JPH074224B2 - Membrane separation reactor controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is characterized in that after a microbial reaction is carried out in a reactor, a separation membrane separates the microorganism and the product resulting from the microbial reaction,
The present invention relates to a control device for stably and highly efficiently operating a so-called membrane separation reactor, which uses recovered microorganisms by returning them to the reactor.

[Prior Art] Conventionally, there is an apparatus of this type shown in FIG.
In the figure, (1) is a reactor, (2) is a separation membrane, and (3)
Is a pump for supplying a suspension containing microorganisms from the reactor (1) to the separation membrane (2), and (4) returns concentrated water that has passed through the separation membrane (2) to the inlet of the separation membrane (2). A pump for circulation, and (5) is a throttle valve for applying a filtration pressure to the separation membrane (2). (6) is a flow meter for measuring the amount of water flowing into the reactor, (7) is a flow meter for measuring the amount of permeated water from the separation membrane (2), (8) is a controller, and the flow meter (6) and the signal line ( 6a), a flow meter (7) and a signal line (7a), and a pump (4) and a signal line (4a).

Next, the operation will be described. In a membrane separation reactor, the water level of the reactor fluctuates unless the amount of water equal to the amount of inflow water is always separated from the separation membrane as permeate, and in the worst case, the reactor overflows or becomes empty. In the conventional device, the amount of water flowing into the reactor is measured by the flow meter (6), and the amount of permeated water from the separation membrane is measured by the flow meter (7), and the circulating water amount is adjusted so that the permeated water amount becomes equal to the inflow water amount. To do. When the amount of circulating water becomes large, the surface velocity of the separation membrane becomes high, the amount of microbial cake adhering to the surface of the membrane increases, and the amount of permeate increases. On the contrary, when the amount of circulating water becomes small, the amount of microbial cake adhering to the membrane surface is reduced and the amount of permeated water is reduced. Thus, the amount of permeated water can be controlled by adjusting the amount of circulating water.

The control equation in the conventional device is shown in the following equation.

▲ Q ^* _j ▼ = G ₁ × (Qi-Qs) (1) In formula (1), Q ^* j is the set value of the circulating water amount, Qi is the inflow water amount, Qs is the permeated water amount, and G ₁ is the gain of the controller. Is. The inflow water amount is obtained as an output signal of the flow meter (6) through the signal line (6a), and the permeated water amount is obtained as an output signal of the flow meter (7) through the signal line (7a). The calculation of equation (1) is performed by the controller (8), and the set value of circulating water is the signal line (4a).
To the pump (4), and the pump (4) adjusts the amount of circulating water so as to reach this set value.

FIG. 15 also shows a conventional device of this type. In the figure, (5) is an electric throttle valve, which is connected to the controller (8) by a signal line (5a). Others are the same as or similar to those in FIG.

Next, the operation will be described. In the conventional device of FIG. 15,
The amount of inflow water to the reactor is measured by the flow meter (6), and the amount of permeated water from the separation membrane is measured by the flow meter (7), and the throttle valve (5) is operated and filtered so that the amount of permeated water becomes equal to the amount of inflow water. Adjust the pressure to control the amount of permeate. The permeation pressure is the driving force of filtration, and when it increases, the amount of permeate increases, and when it decreases, the amount of permeate decreases. In this way, the amount of permeated water can be controlled by adjusting the filtration pressure.
The control equation in the conventional device of FIG. 15 is shown in the following equation.

▲ θ ^* ₂ ▼ = G ₂ × (Qi-Qs) (2) In equation (2), ▲ θ ^* ₂ ▼ is the set value of the opening of the throttle valve (5) and G ₂ is the gain of the controller. . The inflow water amount is obtained as an output signal of the flow meter (6) through the signal line (6a), and the permeated water amount is obtained as an output signal of the flow meter (7) through the signal (7a). The calculation of formula (2) is performed by the controller (8), and the set value of the circulating water amount is sent to the throttle valve (5) via the signal line (5a), and the set value is obtained by the throttle valve (5). FIG. 16 for adjusting the throttle valve is also a conventional device of this type. In the figure, the pump (3) is connected to the controller (8) by a signal line (3a). Others are the same as or similar to those in FIGS.

Next, the operation will be described. In the conventional device of FIG. 16,
The amount of inflow water to the reactor is measured by the flow meter (6), and the amount of permeated water from the separation membrane is measured by the flow meter (7), and the pump (3) is operated so that the amount of permeated water becomes equal to the amount of inflow water. To control the amount of permeated water. When the amount of supplied water increases, the concentration of circulating water SS (suspended solids) in the separation membrane (2) decreases, and the filtration pressure increases slightly due to an increase in the flow rate, so the amount of permeated water increases, and conversely, when the amount of supplied water decreases The amount of water decreases. In this way, the amount of permeated water can be controlled by adjusting the amount of supplied water. The control equation in the conventional device of FIG. 16 is shown in the following equation.

▲ Q ^* _k ▼ = G ₃ × (Qi-Qs) (3) In the equation (2), ▲ Q ^* _k ▼ is the set value of the amount of water supply, and G ₃ is the gain of the controller. The inflow water amount is obtained as an output signal of the flow meter (6) through the signal line (6a), and the permeated water amount is obtained as an output signal of the flow meter (7) through the signal line (7a). The calculation of equation (3) is performed by the controller (8), and the set value of the circulating water amount is sent to the pump (3) via the signal line (3a), and the pump (3) supplies the set value so that the set value is obtained. Adjust the water volume.

[Problems to be Solved by the Invention] Since the conventional control device for a membrane separation reactor is configured as described above, it has the following drawbacks, and the membrane separation reactor is stable and highly efficient. It was difficult to operate.

The controllability of the permeated water is poor in the system in which the inflow water amount and the feed water SS concentration fluctuate, that is, in the conventional example of FIG. 14, the membrane surface velocity of the separation membrane and the microbial cake remaining and attached to the separation membrane surface. The thickness relationship is not linear, and the residual adhesion and microbial cake thickness differ depending on the SS concentration of circulating water even at the same flow rate, so there is a limit in adjusting only the circulating water amount. In the conventional example of FIG. 15, when the filtration pressure is increased to increase the amount of permeated water, the concentration of circulating water also increases and the SS concentration increases, making it difficult to filter. Even if the permeated water amount is increased by increasing the supplied water amount as in the conventional example of FIG. 16, the circulating water SS concentration does not fall below that of the supplied water, and both the inflow water amount and the supplied water SS concentration increase. There is a limit to filtration.

The controllability of the reactor water level is poor, that is, the permeated water amount is controlled so as to be the inflow water amount in FIGS. 14 to 16, so if there is a difference between the two, the reactor water level changes. The controllability of the reactor water level is poor because the difference between the two can only be considered in the integral operation.

The filtering power is large, that is, in the conventional example shown in FIGS. 14 to 16, only one of the circulating water amount, the filtering pressure, and the supplied water amount is adjusted. . For example, in the example of FIG. 15, when increasing the amount of permeated water, the circulating water SS concentration rises and it becomes difficult to filter, so the filtration pressure must be increased exponentially.
If the amount of supplied water is slightly increased to lower the circulating water SS concentration, the filtration power may be reduced.

The first to thirteenth inventions have been made to solve the problems of the above-described conventional apparatus, and an object thereof is to improve the controllability of the amount of permeate and the reactor water level.

Furthermore, the eighth to thirteenth inventions provide a control device for a membrane separation reactor that improves the controllability of the amount of permeated water and the reactor water level and reduces the filtration power to achieve stable and highly efficient operation. To aim.

[Means for Solving the Problems] The control device for a membrane separation reactor according to the first aspect of the present invention is a water level meter for measuring the water level of the reactor, the measured value of the water level meter and a predetermined water level set value. A first controller for generating an output according to the difference between the first controller and a means for adjusting the amount of water supplied to the separation membrane according to the output of the first controller, and a first flow rate for measuring the amount of water flowing into the reactor. Meter, a second flow meter for measuring the amount of permeated water of the separation membrane, and a second flow meter for producing an output according to the difference between the measured value of the first flow meter and the measured value of the second flow meter.
And a means for adjusting the circulating water amount of the separation membrane in accordance with the outputs of the controller and the second controller.

A control device for a membrane separation reactor according to a second aspect of the present invention generates a water level gauge for measuring the water level of the reactor and an output according to the difference between the measured value of the water level gauge and a preset water level set value. To adjust the filtration pressure of the separation membrane according to the output of the first controller, the first flow meter to measure the amount of water flowing into the reactor, the amount of permeate of the separation membrane 2nd flow meter, the measurement value of the first flow meter and the second
The second controller which generates an output according to the difference from the measured value of the flow meter, and means for adjusting the circulating water amount of the separation membrane according to the output of the second controller.

A control device for a membrane separation reactor according to a third aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
A second flow meter that measures the amount of permeated water of the separation membrane, a calculator that calculates the circulating water amount of the separation membrane that serves as a reference from a measurement value of the first flow meter according to a predetermined arithmetic expression, and a first
Controller that generates an output according to the difference between the measured value of the flow meter and the measured value of the second flow meter, and the circulating water amount of the separation membrane according to the sum of the output of the controller and the output of the calculator. It is equipped with a means for adjusting. A control device for a membrane separation type reactor according to a fourth aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
A second flow meter for measuring the amount of permeated water of the separation membrane, a calculator for calculating the filtration pressure of the separation membrane as a reference by a predetermined calculation formula from the measurement value of the first flow meter, and a first flow meter Controller that generates an output according to the difference between the measured value of the second flow meter and the measured value of the second flow meter, and the filtration pressure of the separation membrane is adjusted according to the sum of the output of the controller and the output of the calculator. It is equipped with a means to do. A control device for a membrane separation reactor according to a fifth aspect of the present invention is a first flow meter for measuring the amount of water flowing into the reactor,
A second flow meter for measuring the amount of permeated water of the separation membrane, a calculator for calculating the amount of water supplied to the separation membrane as a reference from a measurement value of the first flow meter by a predetermined arithmetic expression, a first flow rate The controller that generates an output according to the difference between the measured value of the meter and the measured value of the second flow meter, and the amount of water supplied to the separation membrane is adjusted according to the sum of the output of the controller and the output of the calculator. It is equipped with means. A control device for a membrane separation reactor according to a sixth aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
A second flow meter that measures the amount of permeated water of the separation membrane, a second controller that generates an output according to the difference between the measurement value of the first flow meter and the measurement value of the second flow meter, and the second flow meter. Means for adjusting the circulating water amount of the separation membrane according to the output of the controller, SS meter for measuring the SS concentration of circulating water in the separation membrane, the separation as a reference by a predetermined arithmetic expression from the output of the SS meter A calculator for calculating the amount of water supplied to the membrane, a water level meter for measuring the water level of the reactor, and a first controller for producing an output according to the difference between the measured value of the water level meter and a predetermined water level set value. , And means for supplying the amount of water supplied to the separation membrane according to the sum of the output of the first controller and the output of the computing unit. The control device for a membrane separation reactor according to a seventh aspect of the present invention is a first flow meter for measuring the amount of water flowing into the reactor,
A second flow meter that measures the amount of permeated water of the separation membrane, a second controller that generates an output according to the difference between the measurement value of the first flow meter and the measurement value of the second flow meter, and the second flow meter. A means for adjusting the circulating water amount of the separation membrane according to the output of the controller, an SS meter for measuring the circulating water SS concentration of the separation membrane, the reference serving as a reference by a predetermined arithmetic expression from the measured value of the SS meter A calculator for calculating the filtration pressure of the separation membrane, a water level meter for measuring the water level of the reactor, and a first controller for producing an output according to the difference between the measured value of the water level meter and a predetermined water level set value. , And means for adjusting the filtration pressure of the separation membrane in accordance with the sum of the output of the first controller and the output of the computing unit. A control device for a membrane separation reactor according to an eighth aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
The SS pressure for measuring the SS concentration of the water supplied to the separation membrane, the filtration pressure of the separation membrane serving as a reference according to a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, and the same circulation A calculator for calculating the amount of water and the amount of water supplied to the separation membrane,
A water level meter for measuring the water level of the reactor, a first controller for producing an output according to a difference between a measured value of the water level meter and a preset water level set value, an output of the first controller and the calculation Means for adjusting the amount of water supplied to the separation membrane in accordance with the sum of the reference values of the amount of water supply that is the output of the vessel, the second flow meter for measuring the amount of permeated water of the separation membrane, the measurement value of the first flow meter And the second
Second controller that generates an output according to the difference from the measured value of the flow meter of the above, and the separation membrane according to the sum of the output of the second controller and the reference value of the circulating water amount that is the output of the calculator. Means for adjusting the circulating water amount, a pressure gauge for measuring the filtration pressure of the separation membrane, and an output according to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure which is the output of the computing unit. No. 3 controller, and means for adjusting the filtration pressure of the separation membrane according to the output of the third controller. The control device for a membrane separation reactor according to a ninth aspect of the present invention is a first flow meter for measuring the amount of water flowing into the reactor,
The SS pressure for measuring the SS concentration of the water supplied to the separation membrane, the filtration pressure of the separation membrane serving as a reference according to a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, and the same circulation A calculator for calculating the amount of water and the amount of water supplied to the separation membrane,
A water level meter for measuring the water level of the reactor, a first controller for producing an output according to a difference between a measured value of the water level meter and a preset water level set value, an output of the first controller and the calculation Means for adjusting the filtration pressure of the separation membrane according to the sum of the reference values of the filtration pressure which is the output of the vessel, a second flow meter for measuring the amount of permeate of the separation membrane, and a measurement value of the first flow meter. A second controller that generates an output according to the difference from the measured value of the second flow meter, and the above according to the sum of the output of the second controller and the reference value of the circulating water amount that is the output of the calculator. Means for adjusting the amount of circulating water of the separation membrane, a pressure gauge for measuring the filtration pressure of the separation membrane,
A third controller that produces an output according to the difference between the measured value of the pressure gauge and the reference value of the filtration pressure that is the output of the arithmetic unit,
Further, it is provided with means for adjusting the amount of water supplied to the separation membrane according to the sum of the output of the third controller and the reference value of the amount of water supplied which is the output of the computing unit.

A control device for a membrane separation reactor according to a tenth aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
The SS pressure for measuring the SS concentration of the water supplied to the separation membrane, the filtration pressure of the separation membrane serving as a reference according to a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, and the same circulation A calculator for calculating the amount of water and the amount of water supplied to the separation membrane,
A water level meter for measuring the water level of the reactor, a first controller for producing an output according to a difference between a measured value of the water level meter and a preset water level set value, an output of the first controller and the calculation Means for adjusting the circulating water amount of the separation membrane according to the sum of the reference value of the circulating water amount which is the output of the vessel, the second flow meter for measuring the permeated water amount of the separation membrane, and the measurement value of the first flow meter. A second controller that generates an output according to the difference from the measured value of the second flow meter, and the above according to the sum of the output of the second controller and the reference value of the filtration pressure that is the output of the computing unit. Means for adjusting the filtration pressure of the separation membrane, a pressure gauge for measuring the filtration pressure of the separation membrane,
A third controller that produces an output according to the difference between the measured value of the pressure gauge and the reference value of the filtration pressure that is the output of the arithmetic unit,
Further, it is provided with means for adjusting the amount of water supplied to the separation membrane according to the sum of the output of the third controller and the reference value of the amount of water supplied which is the output of the computing unit.

The control device for a membrane separation reactor according to an eleventh invention of the present invention is the first flow meter for measuring the amount of water flowing into the reactor,
The SS pressure for measuring the SS concentration of the water supplied to the separation membrane, the filtration pressure of the separation membrane serving as a reference according to a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, and the same circulation A calculator for calculating the amount of water and the amount of water supplied to the separation membrane,
A water level meter for measuring the water level of the reactor, a first controller for producing an output according to a difference between a measured value of the water level meter and a preset water level set value, an output of the first controller and the calculation Means for adjusting the amount of water supplied to the separation membrane in accordance with the sum of the reference values of the amount of water supply that is the output of the vessel, the second flow meter for measuring the amount of permeated water of the separation membrane, the measurement value of the first flow meter And the second
Second controller that generates an output in accordance with the difference between the measured value of the flow meter and the separation membrane according to the sum of the output of the second controller and the reference value of the filtration pressure that is the output of the calculator. Means for adjusting the filtration pressure, a pressure gauge for measuring the filtration pressure of the separation membrane, and an output corresponding to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure which is the output of the arithmetic unit. Third
And a means for adjusting the circulating water amount of the separation membrane according to the sum of the output of the third controller and the reference value of the circulating water amount which is the output of the computing unit.

A control device for a membrane separation reactor according to a twelfth aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
The SS pressure for measuring the SS concentration of the water supplied to the separation membrane, the filtration pressure of the separation membrane serving as a reference according to a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, and the same circulation A calculator for calculating the amount of water and the amount of water supplied to the separation membrane,
A water level meter for measuring the water level of the reactor, a first controller for producing an output according to a difference between a measured value of the water level meter and a preset water level set value, an output of the first controller and the calculation Means for adjusting the filtration pressure of the separation membrane according to the sum of the reference values of the filtration pressure which is the output of the vessel, a second flow meter for measuring the amount of permeate of the separation membrane, and a measurement value of the first flow meter. A second controller that generates an output according to the difference from the measured value of the second flow meter, and the above according to the sum of the output of the second controller and the reference value of the supplied water amount that is the output of the calculator. A means for adjusting the amount of water supplied to the separation membrane, a pressure gauge for measuring the filtration pressure of the separation membrane, and an output according to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure which is the output of the arithmetic unit. The generated third controller, and the reference value of the circulating water amount which is the output of the third controller and the output of the above computing unit. Those comprising means for adjusting the circulation water of the separation membrane according to the sum.

A control device for a membrane separation reactor according to a thirteenth aspect of the present invention is a first flow meter for measuring an amount of water flowing into the reactor,
The SS pressure for measuring the SS concentration of the water supplied to the separation membrane, the filtration pressure of the separation membrane serving as a reference according to a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, and the same circulation A calculator for calculating the amount of water and the amount of water supplied to the separation membrane,
A water level meter for measuring the water level of the reactor, a first controller for producing an output according to a difference between a measured value of the water level meter and a preset water level set value, an output of the first controller and the calculation Means for adjusting the circulating water amount of the separation membrane according to the sum of the reference value of the circulating water amount which is the output of the vessel, the second flow meter for measuring the permeated water amount of the separation membrane, and the measurement value of the first flow meter. A second controller that generates an output according to the difference from the measured value of the second flow meter, and the above according to the sum of the output of the second controller and the reference value of the supplied water amount that is the output of the calculator. A means for adjusting the amount of water supplied to the separation membrane, a pressure gauge for measuring the filtration pressure of the separation membrane, and an output according to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure which is the output of the arithmetic unit. A third controller generated, and a hand for adjusting the filtration pressure of the separation membrane according to the output of the third controller. It is those with a.

[Operation] The control device for a membrane separation reactor according to the present invention is provided with a computing unit and the amount of circulating water required to obtain the same amount of permeated water as the amount of influent water at that time according to a predetermined arithmetic expression from the amount of influent water or Calculate the supplied water amount or filtration pressure and use the calculated result as a reference value, or measure the reactor water level and the circulating water SS concentration and feed them back to match the permeated water feedback value. Since at least two of the supplied water amount and the filtration pressure are adjusted, the controllability of the permeated water amount and the reactor water level is good.

Further, according to the eighth to thirteenth inventions, an arithmetic unit is provided to calculate the circulating water amount, the supplied water amount, and the filtration pressure that minimize the filtering power by a predetermined arithmetic expression from the inflow water amount, and use this as a reference value. Alternatively, since the above-mentioned measures are taken against the problems of the conventional device that adjusts the circulating water amount, the supplied water amount, and the filtration pressure as set values, the controllability of the permeated water amount and the reactor water level is good. Moreover, the filtration power can be reduced, and the membrane separation reactor can be operated stably and highly efficiently.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a control device for a membrane separation reactor according to the first aspect of the present invention. In the figure, (9) is a water gauge,
(10) is a controller. (9a), (3a) and (10a) are signal lines, and a manual setting device (not shown) for inputting the set values of the controller (10) and water level gauge (9), pump (3), reactor water level And are connected respectively. The rest is the same as in FIG.

Next, the operation will be described. The controllability of the amount of permeated water and the reactor water level is improved by feedback control of the amount of permeated water and measuring the reactor water level and feeding this back to adjust the supplied water amount. In other words, when it is desired to increase the amount of permeated water, the reactor water level must always rise.Therefore, if the supply water amount is increased to reduce the circulating water SS concentration, and if the filtration pressure is increased to increase the filtration rate, Controllability of water volume and reactor water level is improved. The control formula of the feed water amount control by feedback of the reactor water level is shown by the following formula.

▲ ^Q _{* k} ▼ = the ^{_{G 4 × (WL-WL *}} ) ... (4) (4) equation, ▲ ^Q _{* k} ▼ set value of the feed water, WL
Is the measured value of the reactor water level, WL ^* is the same setting value, and G ₄ is the gain of the controller (10). The measured value of the reactor water level is obtained from the water level gauge (9) via the signal line (9a), and the set value is obtained from the signal line (10a). The calculation of the equation (4) is performed by the controller (10), and the set value of the supplied water amount is sent to the pump (3) via the signal line (3a). The pump (3) adjusts the amount of supplied water according to this set value.

FIG. 2 is an embodiment of the control device for the membrane separation reactor according to the second invention of the present invention. In the figure, (5a) is a signal line, which connects the controller (10) and the throttle valve (5). Others are the same as or similar to those in FIGS. 1 and 15.

Next, the operation will be described. The controllability of the amount of permeate and the reactor water level can be improved by feedback control of the amount of permeate water and by measuring the reactor water level and feeding it back to operate the throttle valve to adjust the filtration pressure.
That is, when it is desired to increase the amount of permeated water, the reactor water level also rises, so if the throttle valve is throttled, the filtration pressure increases and the filtration speed increases, so the controllability of the amount of permeated water and the reactor water level improves. The control formula of the filtration pressure control by the feedback of the reactor water level is shown by the following formula.

θ ^* = G ₅ × (WL−WL ^* ) (5) In the equation (5), G ₅ is the gain of the controller (10).
Measure the reactor water level from the water level gauge (9) to the signal line (9
The same set value is obtained from the signal line (10a) via a). The calculation of the equation (5) is performed by the controller (10), and the set value of the throttle valve opening is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

FIG. 3 is an embodiment of a control device for a membrane separation reactor according to the third invention of the present invention. In the figure, (11) is an arithmetic unit, (12) is an adder, and (6b), (4c), and (4b) are signal lines. The signal line (6b) is a flow meter (6) and a calculator (11).
, And the signal line (4c) connects the computing unit (11) and the adder (12), and the signal line (4b) connects the controller (8) and the adder (12).
The signal line (4a) connects the adder (12) and the pump (4), respectively. Others are the same as or similar to those in FIG.

Next, the operation will be described. The controllability of the amount of permeated water and the reactor water level is improved by obtaining the amount of circulating water required to process the measured amount of inflow water and performing feedback control of the amount of permeated water using this as a reference value (feedforward).

The control equation of the control device of FIG. 3 is shown by the following equation.

^{_{▲ Q * j ▼ = f 1}} (Qi) + G 6 × (Qi-Qs) ... (6) f 1 in the expression (6) (Qi) for determining the circulating water required to handle this from the inlet water volume The arithmetic expression, G ₆ is the gain of the controller (8). The inflow water amount is obtained as a measurement value of the flow meter (6) via the signal lines (6a) and (6b), and the permeated water amount is obtained as a measurement value of the flow meter (7) from the signal line (7a). The operation of the first term on the right side of the equation (6) is performed by the arithmetic unit (11),
The calculation of the second term is performed by the controller (8) respectively, and the feedforward amount (reference circulating water amount) is calculated by the signal line (4
c), the feedback amount is obtained via the signal line (4b). Both are added by the adder (12), and the set value of the circulating water amount, which is the sum of both, is pumped (4) via the signal line (4a).
Sent to. In the pump (4), the amount of circulating water is adjusted so as to reach this set value. The arithmetic expression in the arithmetic unit (11) is
It can be determined from a physical filtration model, a statistical model based on a regression analysis of the circulating water amount and the permeated water amount, and the like.

FIG. 4 shows an embodiment of a control device for a membrane separation reactor according to the fourth invention of the present invention. In the figure, (5c),
(5b) is a signal line. The signal line (5c) connects the computing unit (11) and the adder 12), the signal line (5b) connects the controller (8) and the adder (12), and the signal line (5a) connects the adder (12). And the throttle valve (5) are connected to each other. Others are shown in Fig. 3 and Fig.
15 Same as or similar to the above.

Next, the operation will be described. The controllability of the amount of permeated water and the reactor water level is improved by obtaining the throttle valve opening necessary to process the measured amount of inflow water and performing feedback control of the amount of permeated water using this as a reference value (feedforward). To do.

The control equation of the control device in FIG. 4 is represented by the following equation.

θ ^* = f ₂ (Qi) + G ₇ × (Qi-Qs) (7) In the formula (7), f ₂ (Qi) is an operation for obtaining the throttle valve opening required to process the inflow water amount. The equation, G ₇ is the gain of the controller (8). The inflow water amount is obtained as a measurement value of the flow meter (6) via the signal lines (6a) and (6b), and the permeated water amount is obtained as a measurement value of the flow meter (7) from the signal line (7a). The operation of the first term on the right side of the equation (7) is performed by the operation unit (1
1), the calculation of the second term is performed by the controller (8) respectively, and the feedforward amount (reference throttle valve opening) is sent through the signal line (5c) and the feedback amount is sent through the signal line (5b). Obtained. Both are added by the adder (12), and the set value of the throttle valve opening, which is the sum of the two, is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value. The arithmetic expression in the arithmetic unit (11) can be determined from a physical filtration model, a statistical model by regression analysis of the circulating water amount and the permeated water amount, and the like.

FIG. 5 is an embodiment of the control device for the membrane separation reactor according to the fifth aspect of the present invention. In the figure, (3c),
(3b) is a signal line. The signal line (3c) includes an arithmetic unit (11) and an adder (12), the signal line (3b) includes a controller (8) and an adder (12), and the signal line (3a) includes an adder (12). ) And the pump (3) are connected respectively. Others are 3rd, 4th,
It is the same as or similar to FIG.

Next, the operation will be described. The controllability of the amount of permeated water and the reactor water level is improved by obtaining the amount of supplied water necessary for treating this from the measured value of the amount of inflow water and performing feedback control of the amount of permeated water using this as a reference value (feedforward).

The control equation of the control device of FIG. 5 is shown by the following equation.

^{_{▲ Q * k ▼ = f 3}} (Qi) + G 8 × (Qi-Qs) ... (8) f 3 (8) Equation (Qi) for determining a supply amount of water required to handle this from the inlet water volume The arithmetic expression, G ₈ is the gain of the controller (8). The inflow water amount is obtained as a measurement value of the flow meter (6) via the signal lines (6a) and (6b), and the permeated water amount is obtained as a measurement value of the flow meter (7) from the signal line (7a). The operation of the first term on the right side of the equation (8) is performed by the arithmetic unit (11),
The calculation of the second term is performed by the controller (8) respectively, and the feedforward amount (reference supply water amount) is calculated by the signal line (3
c), the feedback amount is obtained via the signal line (3b). Both of them are added by the adder (12), and the set value of the amount of supplied water, which is the sum of the two, is supplied to the pump (3) via the signal line (3a).
Sent to. The pump (3) adjusts the amount of supplied water so as to reach this set value.

The arithmetic expression in the arithmetic unit (11) can be determined from a physical filtration model, a statistical model by regression analysis of the circulating water amount and the permeated water amount, and the like.

FIG. 6 is an embodiment of the control device for the membrane separation reactor according to the sixth aspect of the present invention. In the figure, (13) is an SS meter for measuring the circulating water SS concentration in the separation membrane, and (13a) is a signal line. The signal line (13a) connects the calculator (11) and the SS meter (13), and the signal line (3b) connects the controller (10) and the adder (12).
The signal line (3c) connects the arithmetic unit (11) and the adder (12), and the signal line (3a) connects the adder (12) and the pump (3). Others are the same as or similar to those in FIGS.

Next, the operation will be described. The controllability of the amount of permeated water and the reactor water level can be controlled by feedback control of the amount of permeated water, measuring the SS concentration of circulating water, and determining the reference amount of supplied water from this, and adding the reactor water level as feedback to this to adjust the amount of supplied water. ,improves. That is, when it is desired to increase the amount of permeated water, the reactor water level must be rising.Therefore, the reactor water level and circulating water SS concentration should be taken into consideration to increase the amount of supplied water, lower the circulating water SS concentration, and reduce the filtration pressure. The controllability of the amount of permeated water and the water level of the reactor is improved by increasing the filtration rate and increasing the filtration rate. The control equation of the control device of FIG. 6 is shown by the following equation.

^{_{▲ Q * k ▼ = f 4}} (SSj) + G 9 × (WL-WL *) ... (9) (9) f 4 (SSj) in equation obtaining the average supply amount of water required from the circulating water SS concentration arithmetic expression for, G ₉ represents the gain of the controller (10). Reactor water level is water level gauge (9)
The circulating water SS concentration is measured through the signal line (9a) as
The set value of the reactor water level is obtained from the signal line (10a) via the signal line (13a) as the measurement value of the SS meter (13). The calculation of the first term on the right side of the equation (9) is performed by the calculator (11), and the calculation of the second term is performed by the controller (8). The feedforward amount (reference water supply amount) is calculated by the signal line (3c). )
The feedback amount is obtained via the signal line (3b). Both of them are added by the adder (12), and the set value of the supply water amount, which is the sum of the two, is sent to the pump (3) through the signal line (3a). The pump (3) adjusts the amount of supplied water so as to reach this set value.

The calculation formula f ₄ (SS _J ) is, for example, the following formula from the average value (SSk) of the SS concentration of the supply water, the inflow water amount (Qi), and the SS concentration of the circulating water.

_{f 4 (SSj) = Q kF.F} = SSj · Qi / (SSj-SSk) ... (9a) FIG. 7 is a first embodiment of the seventh invention by membrane separation type reactor of the control device of the present invention . In the figure, the signal line (13
a) add the calculator (11) and SS meter (13), signal line (5b) add the controller (10) and adder (12), signal line (5c) add the calculator (11) The signal line (5a) connects the adder (12) with the throttle valve (5). Others are the same as or similar to those in FIGS.

Next, the operation will be described. The controllability of the permeated water amount and the reactor water level is determined by measuring the circulating water SS concentration together with the feedback control of the permeated water amount and obtaining the reference throttle valve opening from this, and adding the reactor water level as feedback to this to determine the throttle valve opening. It is improved by adjusting.
That is, when it is desired to increase the amount of permeated water, the reactor water level should always rise, so the throttle valve opening should be throttled in consideration of the reactor water level and circulating water SS concentration to raise the filtration pressure and increase the filtration rate. Then, the controllability of the amount of permeate and the reactor water level is improved.

The control equation of the control device of FIG. 7 is shown by the following equation.

_{^{θ * = f 5 (SSj)}} + G 10 × (WL-WL *) ... (10) (10) f 5 (SSj) is for obtaining an average throttle valve opening required from the circulating water SS concentration in formula , G ₁₀ is the gain of the controller (10). The reactor water level is measured by the water level gauge (9) via the signal line (9a) and the circulating water SS
The concentration is obtained as a measurement value of the SS meter (13) via the signal line (13a), and the set value of the reactor water level is obtained from the signal line (10a). The operation of the first term on the right side of the equation (10) is performed by the operation unit (1
1), the calculation of the second term is carried out by the controller (10) respectively, the feedforward amount (reference throttle valve opening) via the signal line (5c) and the feedback amount via the signal line (5b). Obtained. Both are added by the adder (12), and the set value of the throttle valve opening, which is the sum of the two, is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

The arithmetic expression f ₅ (SSj) may be, for example, the above-mentioned expression (9a).

FIG. 8 is an embodiment of the control device for the membrane separation reactor according to the eighth invention of the present invention. In the figure, (14) is a third controller, (15) is a pressure gauge, (16) is an adder, and (11)
a) and (15a) are signal lines. The signal line (3b) connects the calculator (11) and the adder (12), and the signal line (3c) connects the controller (1).
0) and the adder (12), and the signal line (3a) is the adder (12)
And the pump (3), the signal line (4b) to the calculator (11) and the adder (16), the signal line (4c) to the controller (8) and the adder (16), (4a) controls the adder (16) and the pump (4), the signal line (5a) controls the controller (14) and the throttle valve (5), and the signal line (6a) controls the flow meter (6). The signal line (6b) is connected to the flow meter (6) and the calculator (1).
1) and the signal line (7a) is the flow meter (7) and controller (8)
, The signal line (9a) is the water level gauge (9) and the controller (10), the signal line (10a) is the manual setting device (not shown) and the controller (10), and the signal line (11a). ) Is the calculator (11) and controller (1
4), the signal line (13a) connects the calculator (11) and the SS meter (13), and the signal line (15a) connects the pressure gauge (15) and the controller (14). . Others are the same as or similar to those in FIGS.

Next, the operation will be described. To improve the controllability of the permeated water amount and reactor water level and reduce the filtration power, measure the inflow water amount and the SS concentration of the supplied water and obtain the same permeated water amount as the inflow water amount from these by using the filtration model and the filtration power model. Also, the circulating water amount, the supplied water amount, and the filtration pressure that minimize the filtration power are obtained, and these are used as reference values or set values, and the permeated water amount, the reactor water level, and the filtration pressure are fed back to determine the circulating water amount, the supplied water amount, and the filtration pressure. It is achieved by adjusting.

The control equation of the control device in FIG. 8 is shown by the following equation.

^{_{▲ Q * j ▼ = Q jF.F}} + G 11 × (Qi-Qs) ... (11) ▲ Q * k ▼ = Q kF.F + G 12 × (WL-WL *) ... (12) θ * = G 13 × (P-P _FF ) ... (13) In equations (11) to (13), Q _jF.F is the inflow water amount, the supply water SS
Circulating water volume that is obtained from the concentration and that is the same as the inflow water volume and that minimizes the filtration power, Q _kF.F is the same supply water volume,
P _FF is the same filtration pressure, and P is a measurement value of the filtration pressure. G ₁₁ , G ₁₂ , and G ₁₃ are controllers (8), (10),
It is the gain of (14). Calculating the equation (11), the inflow water amount is obtained from the flow meter (6) via the signal line (6a), and the permeated water amount is obtained from the flow meter (7) via the signal line (7a). The calculation of the first term on the right side of the equation (11) is performed by the calculator (11), and the calculation of the second term is performed by the controller (8). The feedforward amount (reference circulating water amount) is calculated by the signal line (4b). ), The feedback amount is obtained via the signal line (4c). Both are added by the adder (16), and the set value of the circulating water amount, which is the sum of the two, is sent to the pump (4) via the signal line (4a). In the pump (4), the amount of circulating water is adjusted so as to reach this set value. Explaining the calculation of the equation (12), the reactor water level is obtained as a measured value of the water level gauge (9) via the signal line (9a), and the set value of the reactor water level is obtained from the signal line (10a). The calculation of the first term on the right side of the equation (12) is the calculator (11), and the calculation of the second term is the controller (10).
The feedforward amount (reference water amount) is obtained through the signal line (3b), and the feedback amount is obtained through the signal line (3c). Both are added by the adder (12), and the set value of the amount of water supplied, which is the sum of both, is the signal line (3a).
To the pump (3). The pump (3) adjusts the amount of supplied water so as to reach this set value. Explaining the calculation of the equation (13), the filtration pressure is measured by the pressure gauge (15) via the signal line (15a), and the set value of the filtration pressure is calculated via the signal line (11a) by the calculator (11). Each obtained. The calculation of equation (13) is performed by the controller (14), and the set value of the throttle valve opening, which is the output of the controller (14), is the signal line (5a).
Through the throttle valve (5). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

The circulating water volume, supply water volume, and filtration pressure that minimize the filtration power while obtaining the same permeation water volume as the inflow water volume are calculated based on the inflow water volume, the supply water SS concentration, and the specifications of the separation membrane device. It can be obtained by the Newton-Raphson method using a dynamic model.

FIG. 9 shows an embodiment of a control device for a membrane separation reactor according to the ninth invention of the present invention. In the figure, (17) is an adder. The signal line (3b) is connected to the arithmetic unit (11) and the adder (1
2) and the signal line (3c) is the controller (14) and the adder (12)
, The signal line (3a) connects the adder (12) and the pump (3), the signal line (4b) connects the computing unit (11) and the adder (16),
The signal line (4c) is the controller (8) and the adder (16), the signal line (4a) is the adder (16) and the pump (4), and the signal line (5b) is the calculator (11). And the adder (17) to the signal line (5
c) is a controller (10) and an adder (17), a signal line (5a)
Is the adder (17) and the throttle valve (5), the signal line (6a) is the flow meter (6) and the controller (8), and the signal line (6b) is the flow meter (6) and the calculator ( 11), the signal line (7a) is the flow meter (7) and the controller (8), the signal line (9a) is the water level meter (9) and the controller (10), and the signal line (10a) Is a manual setting device (not shown) and a controller (10), the signal line (11a) is a calculator (11) and a controller (14), and the signal line (13a) is a calculator (11). The SS gauge (13) and the signal line (15a) are connected to the pressure gauge (15) and the controller (14), respectively. Others are the same as or similar to those in FIGS.

Next, the operation will be described. To improve the controllability of the permeated water amount and reactor water level and reduce the filtration power, measure the inflow water amount and the SS concentration of the supplied water and obtain the same permeated water amount as the inflow water amount from these by using the filtration model and the filtration power model. Also, the circulating water amount, the supplied water amount, and the filtration pressure that minimize the filtration power are obtained, and these are used as reference values or set values, and the permeated water amount, the reactor water level, and the filtration pressure are fed back to determine the circulating water amount, the supplied water amount, and the filtration pressure. It is achieved by adjusting. The control equation of the control device in FIG. 9 is represented by the following equation.

▲ Q ^* _j ▼ = Q _jF.F + G ₁₄ × (Qi-Qs) (14) ▲ Q ^* _k ▼ = Q _kF.F + G ₁₅ × (P-P ^* )… (15) θ ^* = P _FF + G ₁₆ × (WL-WL ^* ) (16) In the equations (14) to (16), G ₁₄ , G ₁₅ , and G ₁₆ are the gains of the controllers (8), (10), and (14), respectively. . (14)
Explaining the calculation of the formula, the inflow water flow rate is measured by the flow meter (6).
The permeated water amount is obtained from the flowmeter (7) via the signal line (7a) via the signal line (6a). The calculation of the first term on the right side of the equation (14) is performed by the calculator (11) and the calculation of the second term is performed by the controller (8). The feedforward amount (reference circulating water amount) is calculated by the signal line (4b). ), The feedback amount is obtained via the signal line (4c). Both are added by the adder (16), and the set value of the circulating water amount, which is the sum of the two, is sent to the pump (4) via the signal line (4a). In the pump (4), the amount of circulating water is adjusted so as to reach this set value.
Explaining the calculation of equation (15), the filtering pressure is measured by the pressure gauge (15) via the signal line (15a), and the setting value of the filtering pressure is calculated via the signal line (11a) by the calculator (11). ) Respectively. The calculation of the first term on the right side of the equation (15) is performed by the computing unit (11), and the computation of the second term is performed by the controller (8). The feedforward amount (reference water supply amount)
Is obtained through the signal line (3b), and the feedback amount is obtained through the signal line (3c). Both of them are added by the adder (12), and the set value of the supply water amount, which is the sum of the two, is sent to the pump (3) through the signal line (3a). The pump (3) adjusts the amount of supplied water so as to reach this set value.

To explain the calculation of equation (16), the reactor water level is measured by the water level gauge (9) via the signal line (9a), and the reactor water level set value is measured via the signal line (11a) by a manual setting device (Fig. (Not shown). The calculation of the first term on the right side of the equation (16) is performed by the calculator (11), and the calculation of the second term is performed by the controller (10). The feedforward amount (a reference throttle valve opening) is calculated by the signal line. (5b) is obtained via the signal line (5c) as the output of the controller (10) with the feedback amount. Both are added by the adder (17), and the set value of the throttle valve opening, which is the sum of the two, is sent to the throttle valve (5) via the signal line (5a). The throttle valve (5) is adjusted to this setting.

FIG. 10 shows one embodiment of the control device for the membrane separation reactor according to the tenth invention of the present invention. In the figure, the signal line (3
b) is an arithmetic unit (11) and an adder (12), a signal line (3c)
Is the controller (14) and the adder (12), the signal line (3a) is the adder (12) and the pump (3), and the signal line (4b) is the calculator (11) and the adder (16). ) And the signal line (4c) is the controller (1
0) and the adder (16), and the signal line (4a) is the adder (16)
And the pump (4), the signal line (5b) to the arithmetic unit (11) and the adder (17), the signal line (5c) to the controller (8) and the adder (17), (5a) is an adder (17) and a throttle valve (5), the signal line (6a) is a flow meter (6) and a controller (8), and the signal line (6b) is a flow meter (6). Calculator (1
1) and the signal line (7a) is the flow meter (7) and controller (8)
, The signal line (9a) is the water level gauge (9) and the controller (10), the signal line (10a) is the manual setting device (not shown) and the controller (10), and the signal line (11a). ) Is the calculator (11) and controller (1
4), the signal line (13a) connects the calculator (11) and the SS meter (13), and the signal line (15a) connects the pressure gauge (15) and the controller (14). . Others are the same as or similar to those in FIGS.

Next, the operation will be described. To improve the controllability of the permeated water amount and reactor water level and reduce the filtration power, measure the inflow water amount and the SS concentration of the supplied water and obtain the same permeated water amount as the inflow water amount from these by using the filtration model and the filtration power model. Also, the circulating water amount, the supplied water amount, and the filtration pressure that minimize the filtration power are obtained, and these are used as reference values or set values, and the permeated water amount, the reactor water level, and the filtration pressure are fed back to determine the circulating water amount, the supplied water amount, and the filtration pressure. It is achieved by adjusting. The control equation of the control device in FIG. 10 is shown by the following equation.

^{_{▲ Q * j ▼ = Q jF.F}} + G 17 × (WL-WL *) ... (17) ▲ Q * k ▼ = Q kF.F + G 18 × (P-P *) ... (18) θ * = P _FF + G ₁₉ × (Qi−Qs) (19) In the equations (17) to (19), G ₁₇ , G ₁₈ , and G ₁₉ are gains of the controllers (8), (10), and (14), respectively. . (17)
To explain the calculation of the equation, the reactor water level is obtained from the water level gauge (9) via the signal line (9a), and the set value of the reactor water level is obtained from the manual setting device (not shown) via the signal line (10a). To be The calculation of the first term on the right side of the equation (17) is performed by the computing unit (11), and the computation of the second term is performed by the controller (10). The feedforward amount (reference circulating water amount)
Is obtained through the signal line (4b), and the feedback amount is obtained through the signal line (4c). Both are added by the adder (16), and the set value of the circulating water amount, which is the sum of the two, is sent to the pump (4) via the signal line (4a). In the pump (4), the amount of circulating water is adjusted so as to reach this set value. Explaining the calculation of the equation (18), the filtration pressure is measured by the pressure gauge (15) via the signal line (15a), and the set value of the filtration pressure is measured by the signal line (11).
It is obtained from the computing unit (11) via a). (1
The calculation of the first term on the right side of the equation 8) is performed by the calculator (11), and the calculation of the second term is performed by the controller (14), and the feedforward amount (reference water supply amount) is the signal line (3b). The feedback amount is obtained via the signal line (3c). Both of them are added by the adder (12), and the set value of the supply water amount, which is the sum of the two, is sent to the pump (3) through the signal line (3a).
The pump (3) adjusts the amount of supplied water so as to reach this set value. Explaining the calculation of equation (19), the inflow water amount is the calculated value of the flow meter (6) via the signal line (6a), and the permeated water amount is the measured value of the flow meter (7) via the signal line (7a). Can be obtained respectively. The calculation of the first term on the right side of the equation (19) is performed by the calculator (11), and the calculation of the second term is performed by the controller (8). The feedforward amount (a reference throttle valve opening) is calculated by the signal line. (5b), the feedback amount is obtained as an output of the controller (8) via the signal line (5c). Both are added by the adder (17), and the set value of the throttle valve opening, which is the sum of the two, is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

FIG. 11 is an embodiment of the control device for the membrane separation reactor according to the eleventh invention of the present invention. In the figure, the signal line (3
b) is an arithmetic unit (11) and an adder (12), a signal line (3c)
Is the controller (10) and the adder (12), the signal line (3a) is the adder (12) and the pump (3), and the signal line (4b) is the calculator (11) and the adder (16). ) And the signal line (4c) is the controller (1
4) and the adder (16), and the signal line (4a) is the adder (16)
And the pump (4), the signal line (5b) to the arithmetic unit (11) and the adder (17), the signal line (5c) to the controller (8) and the adder (17), (5a) is an adder (17) and a throttle valve (5), the signal line (6a) is a flow meter (6) and a controller (8), and the signal line (6b) is a flow meter (6). Calculator (1
1) and the signal line (7a) is the flow meter (7) and controller (8)
, The signal line (9a) is the water level gauge (9) and the controller (10), the signal line (10a) is the manual setting device (not shown) and the controller (10), and the signal line (11a). ) Is the calculator (11) and controller (1
4), the signal line (13a) connects the calculator (11) and the SS meter (13), and the signal line (15a) connects the pressure gauge (15) and the controller (14). . Others are the same as or similar to those in FIGS.

Next, the operation will be described. To improve the controllability of the permeated water amount and reactor water level and reduce the filtration power, measure the inflow water amount and the SS concentration of the supplied water and obtain the same permeated water amount as the inflow water amount from these by using the filtration model and the filtration power model. And, the circulating water amount, the supply water amount, and the filtration pressure that minimize the filtration power are obtained, and this is set as the reference value or set value, and the permeated water amount,
This is achieved by feeding back the reactor water level and the filtration pressure and adjusting the circulating water amount, the feed water amount, and the filtration pressure. The control equation of the control device in FIG. 11 is shown by the following equation.

^{_{▲ Q * j ▼ = Q jF.F}} + G 20 × (P-P *) ... (20) ▲ Q * k ▼ = Q kF.F + G 21 × (WL-WL *) ... (21) θ * = P _FF + G ₂₂ × (Qi-Qs) (22) In the formulas (20) to (22), G ₂₀ , G ₂₁ , and G ₂₂ are the gains of the controllers (8), (10), and (14), respectively. . (20)
Explaining the calculation of the formula, the filtration pressure is measured with a pressure gauge (15).
The set value of the filtration pressure is obtained from the computing unit (11) via the signal line (11a) via the signal line (15a). The calculation of the first term on the right side of the equation (20) is performed by the calculator (11), and the calculation of the second term is performed by the controller (14). The feedforward amount (reference circulating water amount) is calculated by the signal line (4b). )
The feedback amount is obtained via the signal line (4c). Both are added by the adder (16), and the set value of the circulating water amount, which is the sum of the two, is sent to the pump (4) via the signal line (4a). In the pump (4), the amount of circulating water is adjusted so as to reach this set value. Explaining the calculation of equation (21),
The reactor water level is measured by the water level gauge (9) and the signal line (9
Via a) the set point of the reactor water level is respectively obtained from a manual setter (not shown) via signal line (10a).
The calculation of the first term on the right side of the equation (21) is performed by the computing unit (11), and the computation of the second term is performed by the controller (10). The feedforward amount (reference water supply amount) is calculated by the signal line (3b). ), The feedback amount is obtained via the signal line (3c). Both of them are added by the adder (12), and the set value of the supply water amount, which is the sum of the two, is sent to the pump (3) through the signal line (3a). The pump (3) adjusts the amount of supplied water so as to reach this set value. (To explain the calculation of Equation 22, the inflow water amount is measured by the flow meter (6) via the signal line (6a),
The amount of permeated water is obtained as a measurement value of the flow meter (7) via the signal line (7a). The calculation of the first term on the right side of the equation (22) is performed by the calculator (11), and the calculation of the second term is performed by the controller (8). The feedforward amount (a reference throttle valve opening) is calculated by the signal line. (5b), the feedback amount is obtained as an output of the controller (8) via the signal line (5c). Both are added by the adder (17), and the set value of the throttle valve opening, which is the sum of the two, is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

FIG. 12 is an embodiment of the control device for the membrane separation reactor according to the twelfth invention of the present invention. In the figure, the signal line (3
b) is an arithmetic unit (11) and an adder (12), a signal line (3c)
Is the controller (8) and the adder (12), the signal line (3a) is the adder (12) and the pump (3), and the signal line (4b) is the calculator (11) and the adder (16). ) And the signal line (4c) is the controller (1
4) and the adder (16), and the signal line (4a) is the adder (16)
And the pump (4), the signal line (5b) to the calculator (11) and the adder (17), the signal line (5c) to the controller (10) and the adder (17), (5a) is an adder (17) and a throttle valve (5), the signal line (6a) is a flow meter (6) and a controller (8), and the signal line (6b) is a flow meter (6). Calculator (1
1) and the signal line (7a) is the flow meter (7) and controller (8)
, The signal line (9a) is the water level gauge (9) and the controller (10), the signal line (10a) is the manual setting device (not shown) and the controller (10), and the signal line (11a). ) Is the calculator (11) and controller (1
4), the signal line (13a) connects the calculator (11) and the SS meter (13), and the signal line (15a) connects the pressure gauge (15) and the controller (14). . Others are the same as or similar to those in FIGS.

Next, the operation will be described. To improve the controllability of the permeated water amount and reactor water level and reduce the filtration power, measure the inflow water amount and the SS concentration of the supplied water and obtain the same permeated water amount as the inflow water amount from these by using the filtration model and the filtration power model. And, the circulating water amount, the supply water amount, and the filtration pressure that minimize the filtration power are obtained, and this is set as the reference value or set value, and the permeated water amount,
This is achieved by feeding back the reactor water level and the filtration pressure and adjusting the circulating water amount, the feed water amount, and the filtration pressure. This is achieved by adjusting the pressure.

The control equations of the control device in FIG. 12 are represented by equations (23) to (24). (23) to (25), G _23, G _24, G ₂₅ each Controller (8), (10), a gain of (14).

^{_{▲ Q * j ▼ = Q jF.F}} + G 23 × (P-P *) ... (23) ▲ Q * k ▼ = Q kF.F + G 24 × (Qi-Qs) ... (24) θ * = P FF ＋ G ₂₅ × (WL-WL ^* ) (25) Explaining the calculation of equation (23), the filtration pressure is set from the pressure gauge (15) via the signal line (15a), and the set value of the filtration pressure is calculated by the calculator ( 11) via the signal line (11a). The calculation of the first term on the right side of the equation (23) is performed by the arithmetic unit (11),
The calculation of the second term is performed by the controller (14) respectively, and the feedforward amount (reference circulating water amount) is calculated by the signal line (4).
b), the feedback amount is obtained via the signal line (4c). Both are added by the adder (16), and the set value of the circulating water amount, which is the sum of the two, is pumped (4) via the signal line (4a).
Sent to. In the pump (4), the amount of circulating water is adjusted so as to reach this set value. Explaining the calculation of equation (24), the amount of inflow water is calculated by the flowmeter (6) as a signal line (6
The amount of permeated water is obtained via the signal line (7a) as a measurement value of the flowmeter (7) via a). The calculation of the first term on the right side of the equation (24) is performed by the calculator (11), and the calculation of the second term is performed by the controller (10). The feedforward amount (reference supply water amount) is calculated by the signal line ( In 3b), the feedback amount is obtained via the signal line (3c). Both of them are added by the adder (12), and the set value of the supply water amount, which is the sum of the two, is sent to the pump (3) through the signal line (3a). The pump (3) adjusts the amount of supplied water so as to reach this set value.
To explain the calculation of equation (25), the reactor water level is measured by the water level gauge (9) via the signal line (9a), and the reactor water level set value is measured via the signal line (10a) by a manual setting device (Fig. (Not shown). The calculation of the first term on the right side of the equation (25) is performed by the calculator (11), and the calculation of the second term is performed by the controller (10). The feedforward amount (a reference throttle valve opening) is a signal. The line (5b) and the feedback amount are obtained as the output of the controller (10) via the signal line (5c). Both are added by the adder (17), and the set value of the throttle valve opening, which is the sum of the two, is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

FIG. 13 is an embodiment of a control device for a membrane separation reactor according to the thirteenth invention of the present invention. In the figure, the signal line (3
b) is an arithmetic unit (11) and an adder (12), a signal line (3c)
Is the controller (8) and the adder (12), the signal line (3a) is the adder (12) and the pump (3), and the signal line (4b) is the calculator (11) and the adder (16). ) And the signal line (4c) is the controller (1
0) and the adder (16), and the signal line (4a) is the adder (16)
And pump (4), signal line (5a) for controller (14) and throttle valve (5), signal line (6a) for flow meter (6) and controller (8), (6b) is a flow meter (6) and a calculator (1
1) and the signal line (7a) is the flow meter (7) and controller (8)
, The signal line (9a) is the water level gauge (9) and the controller (10), the signal line (10a) is the manual setting device (not shown) and the controller (10), and the signal line (11a). ) Is the calculator (11) and controller (1
4), the signal line (13a) connects the calculator (11) and the SS meter (13), and the signal line (15a) connects the pressure gauge (15) and the controller (14). . Others are the same as or similar to those in FIGS.

Next, the operation will be described. To improve the controllability of the permeated water amount and reactor water level and reduce the filtration power, measure the inflow water amount and the SS concentration of the supplied water and obtain the same permeated water amount as the inflow water amount from these by using the filtration model and the filtration power model. And, the circulating water amount, the supply water amount, and the filtration pressure that minimize the filtration power are obtained, and this is set as the reference value or set value, and the permeated water amount,
This is achieved by feeding back the reactor water level and the filtration pressure and adjusting the circulating water amount, the feed water amount, and the filtration pressure.

The control system of the control device in FIG. 13 is expressed by the equations (26) to (28).

▲ Q ^* _j ▼ = Q _jF.F + G ₂₆ (WL−WL ^* )… (26) ▲ Q ^* _k ▼ = Q _kF.F + G ₂₇ × (Qi−Qs)… (27) θ ^* = G ₂₈ × in ^{(P-P *) ... (} 28) (26) ~ (28) _{formula, G 26, G 27, G} 28 each Controller (8), a gain of (10), (14). (26)
Calculating the formula, the reactor water level is measured by the water level gauge (9) via the signal line (9a), and the reactor water level setting value is manually set via the signal line (10a) (not shown). Each obtained from. The calculation of the first term on the right side of the equation (26) is the calculator (11), and the calculation of the second term is the controller (10).
The feed-forward amount (reference circulating water amount) is obtained through the signal line (4b), and the feedback amount is obtained through the signal line (4c). Both are added by the adder (16), and the set value of the circulating water amount, which is the sum of the two, is the signal line (4a).
To the pump (4). In the pump (4), the amount of circulating water is adjusted so as to reach this set value. Explaining the calculation of equation (27), the inflow water amount is measured value of the flow meter (6) via the signal line (6a), and the permeated water amount is measured value of the flow meter (7) via the signal line (7a). Can be obtained respectively. The operation of the first term on the right side of the equation (27) is performed by the arithmetic unit (11),
The calculation of the second term is performed by the controller (8), and the feedforward amount (reference water supply amount) is obtained through the signal line (3b) and the feedback amount is obtained through the signal line (3c). Both of them are added by the adder (12), and the set value of the supply water amount, which is the sum of the two, is sent to the pump (3) through the signal line (3a). The pump (3) adjusts the amount of supplied water so as to reach this set value. Explaining the calculation of equation (28), the filtration pressure is measured from the pressure gauge (15)) to the signal line (15a).
The set value of the filtration pressure is obtained from the calculator (11) via the signal line (11a). The calculation of the equation (28) is performed by the controller (14), and the set value of the throttle valve opening obtained as this output is sent to the throttle valve (5) via the signal line (5a). In the throttle valve (5), the throttle valve is adjusted so as to reach this set value.

In the above embodiment, the time continuous analog type is used, but the same effect can be obtained by using a digital type or a time discontinuous analog type (sample value type).

Further, in the above-mentioned example, the membrane separation type reactor is constituted by the reactor and the separation membrane, and the example in which the water level meter for measuring the reactor water level is installed is shown, but there is an adjusting tank between the reactor and the separation membrane, and the reactor is simply In the overflow membrane separation reactor, a water level gauge may be installed in the adjusting tank.

As a reference, the membrane separation reactor was described in the above embodiment, but a membrane treatment system for producing ultrapure water in semiconductor production, a membrane treatment system for advanced treatment of sewage treatment water, seawater, desalination system, etc. The same effect can be obtained by applying the present invention to a membrane separation system including a separation membrane and an adjustment tank.

[Effects of the Invention] As described above, according to the first to thirteenth inventions, an arithmetic unit is provided to obtain an amount of permeated water equal to the amount of inflow water at that time by a predetermined arithmetic expression from the amount of inflow water. Calculate the required circulating water amount or supply water amount or filtration pressure and use the calculation result as a reference value, or measure the reactor water level and circulating water SS concentration and feed this back to the feedback of the permeated water amount. Since at least two of the circulating water amount, the supply water amount, and the filtration pressure are adjusted, the controllability of the permeated water amount and the reactor water level can be improved. Further, according to the eighth to thirteenth inventions, a calculator is provided to calculate the circulating water amount, the supply water amount, and the filtration pressure at which the filtration power is the minimum, from the inflow water amount and the supply water SS concentration by a predetermined arithmetic expression, Circulating water volume with this as a set value or reference value,
Since the amount of supplied water and the filtration pressure are adjusted, the controllability of the amount of permeated water and the reactor water level is good, the filtration power can be reduced, and the extremely excellent effect that the membrane separation reactor can be operated stably and highly efficiently is achieved. is there.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the control device for a membrane separation reactor according to the first invention of the present invention, and FIG. 2 is one embodiment of the control device for a membrane separation reactor according to the second invention of the present invention. FIG. 3 is a configuration diagram showing an example, FIG. 3 is a configuration diagram showing an embodiment of a control device for a membrane separation reactor according to the third invention of the present invention, and FIG.
FIG. 5 is a block diagram showing an embodiment of a control device for a membrane separation reactor according to the fourth invention of the present invention, and FIG. 5 is an embodiment of a control device for a membrane separation reactor according to the fifth invention of the present invention. FIG. 6 is a configuration diagram showing a first embodiment of a control device for a membrane separation reactor according to the sixth invention of the present invention, and FIG. 7 is a control diagram of a membrane separation reactor according to the seventh invention of the present invention. FIG. 8 is a block diagram showing one embodiment of the apparatus, FIG. 8 is a block diagram showing one embodiment of a control apparatus for a membrane separation reactor according to the eighth invention of the present invention, and FIG. 9 is a view showing the ninth invention of the present invention. FIG. 10 is a configuration diagram showing an embodiment of a control device for a membrane separation reactor, and FIG. 10 is a view showing a control device for a membrane separation reactor according to a tenth aspect of the present invention.
11 is a configuration diagram showing an embodiment, FIG. 11 is a configuration diagram showing one embodiment of a control device for a membrane separation reactor according to the eleventh invention of the present invention, and FIG. 12 is a membrane separation type according to the twelfth invention of the present invention. FIG. 13 is a block diagram showing one embodiment of a reactor control device, FIG. 13 is a block diagram showing one embodiment of a membrane separation reactor control device according to the thirteenth invention of the present invention, and FIGS. It is a block diagram which shows the control apparatus of a membrane separation reactor. In the figure, (1) is a reactor, (2) is a separation membrane,
(3) and (4) are pumps, (5) is a throttle valve, (6),
(7) is a flow meter, (8), (10), (14) is a controller,
(9) is a water gauge, (11) is a calculator, (12), (15),
(16) is an adder, (13) is an SS meter, (15) is a pressure gauge, (3
a), (3b), (3c), (4a), (4b), (4c), (5
a), (5b), (5c), (6a), (6b), (7a), (9
a), (11a), (13a), and (15a) are signal lines. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (13)

[Claims] 1. A water level gauge for measuring the water level of a reactor, and a first water level meter for outputting a control target value of the amount of water supplied to a separation membrane in accordance with the difference between the measured value of the water level gauge and a predetermined water level set value. Controller, a supply water amount adjusting means for adjusting the amount of water supplied to the separation membrane according to the output of the first controller, a first flow meter for measuring the amount of water flowing into the reactor, and the separation membrane. A second flow meter for measuring the amount of permeate of water, and a control target value of the circulating water amount of the separation membrane is output according to the difference between the measurement value of the first flow meter and the measurement value of the second flow meter. A control device for a membrane separation reactor, comprising: a second controller; and a circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane according to the output of the second controller. 2. A water level gauge for measuring the water level of the reactor, and a first water level meter for outputting a control target value of the filtration pressure of the separation membrane in accordance with the difference between the measured value of the water level gauge and a predetermined water level set value. A controller, a filtration pressure adjusting means for adjusting the filtration pressure of the separation membrane according to the output of the first controller, a first flow meter for measuring the amount of water flowing into the reactor, and a permeation of the separation membrane. A second flow meter that measures the amount of water, and a second flow meter that outputs a control target value of the circulating water amount of the separation membrane according to the difference between the measured value of the first flow meter and the measured value of the second flow meter. And a circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane according to the output of the second controller. 3. A first flow meter for measuring the amount of water flowing into the reactor, and a second flow meter for measuring the amount of permeate of the separation membrane.
An arithmetic unit that calculates the circulating water amount of the separation membrane, which serves as a reference for processing the inflow water amount from the measured value of the first flow meter according to a predetermined arithmetic expression, and the measured value of the first flow meter and the above A controller that outputs a control feedback amount of the circulating water amount of the separation membrane according to the difference from the measurement value of the second flow meter, and a separation membrane with the sum of the output of the controller and the output of the calculator as the control target value. And a circulating water amount adjusting means for adjusting the circulating water amount. 4. A first flow meter for measuring the amount of water flowing into the reactor, and a second flow meter for measuring the amount of permeate of the separation membrane.
An arithmetic unit that calculates the filtration pressure of the separation membrane that serves as a reference for processing the inflow water amount from the measurement value of the first flow meter according to a predetermined arithmetic expression, the measurement value of the first flow meter and the above A controller that outputs a control feedback amount of the filtration pressure of the separation membrane according to the difference from the measurement value of the second flow meter, and a separation membrane with the sum of the output of the controller and the output of the calculator as the control target value. And a filtration pressure adjusting means for adjusting the filtration pressure of the membrane separation type reactor. 5. A first flowmeter for measuring the amount of water flowing into the reactor, and a second flowmeter for measuring the amount of permeate of the separation membrane.
A calculator for calculating the amount of water supplied to the separation membrane, which serves as a reference for processing the amount of inflow water, from the measured value of the first flow meter according to a predetermined arithmetic expression, and the measured value of the first flow meter. A controller that outputs a control feedback amount of the amount of water supplied to the separation membrane according to the difference from the measurement value of the second flow meter, and the sum of the output of the controller and the output of the calculator as the control target value. A control device for a membrane separation type reactor, comprising: a supply water amount adjusting means for adjusting the supply water amount to a separation membrane. 6. A first flow meter for measuring the amount of water flowing into the reactor, and a second flow meter for measuring the amount of permeate water of the separation membrane.
The second controller that outputs a target value of the circulating water amount of the separation membrane according to the difference between the measurement value of the first flow meter and the measurement value of the second flow meter, and the second controller Circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane according to the output, SS meter to measure the circulating water SS concentration of the separation membrane, the inflow water amount by a predetermined arithmetic expression from the measured value of the SS meter A calculator for calculating the amount of water supplied to the separation membrane that serves as a reference for treatment, a water level meter for measuring the water level of the reactor, and a difference between the measured value of the water level meter and a predetermined water level set value. The first controller that outputs the control feedback amount of the circulating water amount of the separation membrane, and the sum of the output of the first controller and the output of the calculator is used as a control target value to adjust the amount of water supplied to the separation membrane. A control device for a membrane separation type reactor, comprising a supply water amount adjusting means. 7. A first flow meter for measuring the amount of water flowing into the reactor, and a second flow meter for measuring the amount of permeate of the separation membrane.
The second controller that outputs a target value of the circulating water amount of the separation membrane according to the difference between the measurement value of the first flow meter and the measurement value of the second flow meter, and the second controller Circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane according to the output, SS meter to measure the circulating water SS concentration of the separation membrane, the inflow water amount by a predetermined arithmetic expression from the measured value of the SS meter A calculator for calculating the filtration pressure of the separation membrane that serves as a reference for processing,
A water level meter that measures the water level of the reactor, and a first controller that outputs a control feedback amount of the filtration pressure of the separation membrane according to the difference between the measured value of the water level meter and a predetermined water level set value, A control device for a membrane separation type reactor, comprising: a filtration pressure adjusting means for adjusting the filtration pressure of the separation membrane by using the sum of the output of the first controller and the output of the arithmetic unit as a control target value. 8. A first flow meter for measuring the amount of water flowing into the reactor, an SS meter for measuring the SS concentration of the water supplied to the separation membrane, a measurement value of the first flow meter and a measurement of the SS meter. Calculate the reference value of the filtration pressure of the separation membrane, the circulating water volume, and the amount of water supplied to the separation membrane while minimizing the filtration power while obtaining the amount of permeated water equivalent to the amount of inflow water by a predetermined arithmetic expression from the value A computing unit, a water level meter that measures the water level of the reactor, and outputs a control feedback amount of the amount of water supplied to the separation membrane according to the difference between the measured value of the water level meter and a predetermined water level set value. A controller for controlling the amount of water supplied to the separation membrane by using the sum of the output of the first controller and the reference value of the amount of water supplied from the calculator as a control target value; The second flow meter for measuring the amount of permeated water of the membrane and the first flow meter A second controller that outputs a control feedback amount of the circulating water amount of the separation membrane according to the difference between the measured value and the measured value of the second flow meter, the output of the second controller, and the output of the calculator. Circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane using the sum of the reference value of the circulating water amount which is the output as a control target value, a pressure gauge for measuring the filtration pressure of the separation membrane, and the measured value of the pressure gauge and the above. A third controller that outputs a control feedback amount of the filtration pressure of the separation membrane according to the difference from the reference value of the filtration pressure that is the output of the calculator, and the output of the third controller is separated as the control target value. A control device for a membrane separation reactor, comprising a filtration pressure adjusting means for adjusting the filtration pressure of the membrane. 9. A first flow meter for measuring the amount of water flowing into the reactor, an SS meter for measuring the SS concentration of the water supplied to the separation membrane, a measurement value of the first flow meter and a measurement of the SS meter. Calculate the reference value of the filtration pressure of the separation membrane, the circulating water volume, and the amount of water supplied to the separation membrane while minimizing the filtration power while obtaining the amount of permeated water equivalent to the amount of inflow water by a predetermined arithmetic expression from the value Which outputs the control feedback amount of the filtration pressure of the separation membrane according to the difference between the measured value of the water level gauge for measuring the water level of the reactor and the predetermined water level set value. Controller, filtration pressure adjusting means for adjusting the filtration pressure of the separation membrane with the sum of the output of the first controller and the reference value of the filtration pressure output from the calculator as a control target value, and Measurement of the second flow meter that measures the amount of permeated water and the above-mentioned first flow meter And a second controller that outputs a control feedback amount of the circulating water amount of the separation membrane according to the difference between the measured value of the second flow meter and the output value of the second controller and the output of the calculator. A circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane with the sum of reference values of certain circulating water amounts as control target values, a pressure gauge for measuring the filtration pressure of the separation membrane, a measured value of the pressure gauge and the computing unit. The third controller that outputs the control feedback amount of the amount of water supplied to the separation membrane according to the difference from the reference value of the filtration pressure that is the output of the above, and the output of the third controller and the output of the calculator. A control device for a membrane separation reactor, comprising: a supply water amount adjusting means for adjusting the supply amount of water to a separation membrane using a sum of reference values of a certain supply amount of water as a control target value. 10. A first flow meter for measuring the amount of water flowing into the reactor, and an SS meter for measuring the SS concentration of the water supplied to the separation membrane.
The filtration pressure of the separation membrane that minimizes the filtration power while obtaining the permeated water amount equivalent to the inflow water amount by a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, Depending on the difference between the measured value of the circulating water amount and the reference value of the amount of water supplied to the separation membrane, the water level meter that measures the water level of the reactor, and the preset value of the water level. And a first controller that outputs a control feedback amount of the circulating water amount of the separation membrane, and a separation membrane with the sum of the output of the first controller and the reference value of the circulating water amount that is the output of the calculator as the control target value. The circulating water amount adjusting means for adjusting the circulating water amount, the second flow meter for measuring the permeated water amount of the separation membrane, and the difference between the measured value of the first flow meter and the measured value of the second flow meter. According to the second control, the control feedback amount of the filtration pressure of the separation membrane is output. A node meter, filtration pressure adjusting means for adjusting the filtration pressure of the separation membrane with the sum of the output of the second controller and the reference value of the filtration pressure output from the calculator as a control target value; A pressure gauge for measuring the filtration pressure, and a third output for outputting a control feedback amount of the amount of water supplied to the separation membrane according to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure which is the output of the arithmetic unit. Membrane provided with a controller, and a supply water amount adjusting means for adjusting the amount of water supplied to the separation membrane by using the sum of the output of the third controller and the reference value of the amount of supply water as the output of the calculator as a control target value. Control device for separate reactor. 11. A first flow meter for measuring the amount of water flowing into the reactor, and an SS meter for measuring the SS concentration of the water supplied to the separation membrane.
The filtration pressure of the separation membrane that minimizes the filtration power while obtaining the permeated water amount equivalent to the inflow water amount by a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, Depending on the difference between the measured value of the circulating water amount and the reference value of the amount of water supplied to the separation membrane, the water level meter that measures the water level of the reactor, and the preset value of the water level. Separates the first controller that outputs a control feedback amount of the amount of water supplied to the separation membrane, and the sum of the output of the first controller and the reference value of the amount of water supplied that is the output of the calculator as the control target value. A supply water amount adjusting means for adjusting the supply amount of water to the membrane, a second flow meter for measuring the amount of permeated water of the separation membrane, a measurement value of the first flow meter and a measurement value of the second flow meter. The control feedback amount of the filtration pressure of the separation membrane is output according to the difference. Controller, filtration pressure adjusting means for adjusting the filtration pressure of the separation membrane with the sum of the output of the second controller and the reference value of the filtration pressure output from the calculator as a control target value, and the separation membrane. Of the pressure gauge for measuring the filtration pressure of No. 3, and a third control unit for outputting the control feedback amount of the circulating water amount of the separation membrane according to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure which is the output of the arithmetic unit. Membrane separation including a controller and circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane with the sum of the output of the third controller and the reference value of the circulating water amount output from the computing unit as a control target value. Type reactor control device. 12. A first flow meter for measuring the amount of water flowing into the reactor, and an SS meter for measuring the SS concentration of the water supplied to the separation membrane.
The filtration pressure of the separation membrane that minimizes the filtration power while obtaining the permeated water amount equivalent to the inflow water amount by a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, Depending on the difference between the measured value of the circulating water amount and the reference value of the amount of water supplied to the separation membrane, the water level meter that measures the water level of the reactor, and the preset value of the water level. And a first controller that outputs a control feedback amount of the filtration pressure of the separation membrane, and the separation membrane with the sum of the output of the first controller and the reference value of the filtration pressure that is the output of the calculator as the control target value. To a difference between the measurement value of the first flow meter and the measurement value of the second flow meter; Secondly, according to which the control feedback amount of the amount of water supplied to the separation membrane is output. A controller, a water supply amount adjusting means for adjusting the amount of water supplied to the separation membrane by using the sum of the output of the second controller and the reference value of the amount of water supplied from the calculator as a control target value, and the separation membrane A pressure gauge for measuring the filtration pressure of
A third controller that outputs a control feedback amount of the circulating water amount of the separation membrane according to the difference between the measured value of the pressure gauge and the reference value of the filtration pressure that is the output of the calculator, and the third controller. And a circulating water amount adjusting means for adjusting the circulating water amount of the separation membrane with the sum of the reference value of the circulating water amount as the output of the calculator as a control target value. 13. A first flow meter for measuring the amount of water flowing into the reactor, and an SS meter for measuring the SS concentration of the water supplied to the separation membrane.
The filtration pressure of the separation membrane that minimizes the filtration power while obtaining the permeated water amount equivalent to the inflow water amount by a predetermined arithmetic expression from the measurement value of the first flow meter and the measurement value of the SS meter, Depending on the difference between the measured value of the circulating water amount and the reference value of the amount of water supplied to the separation membrane, the water level meter that measures the water level of the reactor, and the preset value of the water level. And a first controller that outputs a control feedback amount of the circulating water amount of the separation membrane, and a separation membrane with the sum of the output of the first controller and the reference value of the circulating water amount that is the output of the calculator as the control target value. The circulating water amount adjusting means for adjusting the circulating water amount, the second flow meter for measuring the permeated water amount of the separation membrane, and the difference between the measured value of the first flow meter and the measured value of the second flow meter. Secondly, according to which the control feedback amount of the amount of water supplied to the separation membrane is output. A controller, a water supply amount adjusting means for adjusting the amount of water supplied to the separation membrane by using the sum of the output of the second controller and the reference value of the amount of water supplied from the calculator as a control target value, and the separation membrane A pressure gauge for measuring the filtration pressure of
A third controller that outputs a control feedback amount of the filtration pressure of the separation membrane according to the difference between the measurement value of the pressure gauge and the reference value of the filtration pressure that is the output of the calculator, and the third controller. Control device for a membrane separation type reactor, which comprises a filtration pressure adjusting means for adjusting the filtration pressure of the separation membrane by using the output of the control target value.