JPH0979557A - Operation control method of drying/incineration equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lowering of combustion efficiency by setting a delivery value of a matter to be treated from a hopper, and a drive load of a drier as a condition part and the temperature of an exhaust gas from the drier and the supply quantity of the matter to be treated and the supply quantity of combustion air both to an incinerator as a conclusion part to perform a fuzzy reasoning. SOLUTION: A controller sets a delivery value of sludge dehydrated from a dehydrated sludge hopper 16, the level of dry sludge in an intermediate hopper 19, a load current value of an agitator 2 for incineration, a load current value of a rotary drum 13a, a load current value of an agitator 13b for drying and an opening value of a damper 27 of an induction fan 28 as a condition part and a delivery value of the dehydrated sludge from the dehydrated sludge hopper 16, the amount of combustion air from an incineration burning fan 7, a delivery value of dry sludge from an intermediate hopper 19 and a set value of an exhaust gas from a drier 13 as a conclusion part and performs a fuzzy reasoning to accomplish an operation control with a better combustion efficiency. This can keep the air ratio in the incinerator 1 constant thereby preventing a lowering of combustion efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the operation of a dry incineration facility in which exhaust gas from the incineration process is used in the drying process when drying and incinerating sludge such as sewage sludge and night soil sludge. It is about.

[0002]

2. Description of the Related Art Generally, in a dry incinerator, a dryer for drying the dehydrated sludge is connected to the outlet side of the dehydrated sludge hopper, and an outlet for temporarily storing the dried sludge is provided at the outlet side of the dryer. Hopper is connected. An incinerator for incinerating dry sludge with a combustion burner is connected to the outlet side of the intermediate hopper. An exhaust gas circulation path is provided between the incinerator and the dryer. An induction fan is provided in the exhaust gas circulation path on the outlet side of the dryer, and when the induction fan is driven, the exhaust gas is drawn into the dryer from the incinerator. Then, a part of the exhaust gas is re-supplied to the incinerator via the induction fan, and the rest is discharged to the outside of the dry incineration facility.

Conventionally, as a method for controlling the operation of such a dry incineration facility by fuzzy reasoning, for example, Japanese Patent Laid-Open No. 6-8
A device as disclosed in Japanese Patent No. 2023 is known.
That is, in the method described in the publication, the temperature in the incinerator,
The temperature setting in the incinerator, the damper opening of the combustion fan and the dewatering sludge hopper of the incinerator are set with the conditions of the exhaust gas temperature of the dryer, the damper opening of the induction fan and the amount of dewatered sludge cut from the dewatering sludge hopper to the dryer. Fuzzy inference is performed with the cutting amount as the conclusion, and operation control of the dry incineration facility is performed.

[0004]

However, in the above-mentioned conventional operation control method, the amount of combustion air supplied to the incinerator is adjusted regardless of the amount of sludge cut out supplied to the incinerator. Therefore, the air ratio in the incinerator (the amount of combustion air required to incinerate with respect to the amount of sludge, and the ratio is preferably about "1.8" in this type of incinerator). It cannot be kept constant. If the air ratio is too low,
The amount of combustion air to the incinerator tends to be insufficient, resulting in incomplete combustion, which causes carbon monoxide to be generated. On the other hand, if the air ratio is excessively large, the amount of combustion air in the incinerator tends to be excessive, which causes generation of nitrogen oxides (NO _x ), and causes deterioration of fuel efficiency.

Therefore, the present invention has an object to make it possible to prevent the combustion efficiency from decreasing by keeping the air ratio in the incinerator constant.

[0006]

According to a first aspect of the present invention, there is provided a processing object hopper into which a processing object is placed, a dryer for drying the processing object discharged from the processing object hopper, A incinerator that incinerates the object to be processed discharged from the dryer by a heating unit, a combustion air supplier that supplies combustion air to the incinerator, and a circulation path between the dryer and the incinerator. Exhaust gas circulation path, which is provided on the exhaust gas circulation path on the downstream side of the dryer, and has an attracting unit that draws the exhaust gas from the incinerator into the dryer, and uses the exhaust gas from the incinerator to process the object to be treated. In the operation control method of the dry incineration equipment, which is dried in the dryer, the dried object is incinerated in the incinerator by using the exhaust gas re-supplied via the attracting means. Amount of material to be processed from the processed material hopper and drying A driving load value and a condition part,
The cut-out amount of the processed object from the processed object hopper, the temperature of the exhaust gas discharged from the dryer, the supplied amount of the processed object to the incinerator,
The main point is to carry out fuzzy inference using the amount of combustion air supplied to the incinerator as the conclusion. According to this method, the fuzzy theory is ruled by the condition part and the conclusion part. Then, the amount of combustion air sent to the incinerator is determined according to the amount of the material to be processed supplied to the incinerator, and the air ratio in the incinerator becomes constant.

According to a second aspect of the present invention, an intermediate hopper is provided between the dryer and the incinerator, and the amount of material to be processed supplied to the incinerator is the amount cut out from the intermediate hopper. That is the gist. According to this method, the material to be processed from the dryer immediately after the operation of the dry incineration facility is stopped is stored in the intermediate hopper.

A third aspect of the present invention is based on the fact that fuzzy inference is performed by adding the amount of the object to be processed stored in the intermediate hopper to the condition section. According to this method, when the object to be processed is about to overflow from the intermediate hopper, the amount of the object to be processed cut out from the intermediate hopper increases.

According to a fourth aspect of the present invention, the exhaust gas circulation path between the dryer and the attracting means is provided with opening / closing means for opening / closing the circulation path, and the opening degree of the opening / closing means is added to the condition part. The main point is that fuzzy reasoning is performed. According to this method, the low-temperature gas is maximally supplied to the incinerator, and by controlling the temperature of the incinerator, the temperature is kept constant, so that the amount of increased gas is supplied to the dryer by the amount of the increased amount of gas. .

According to a fifth aspect of the present invention, incineration stirring means for stirring the object to be treated is provided in the incinerator, and the drive load value of the incineration stirring means is added to the condition section to fuzzy. Reasoning is done. According to this method, when the driving load of the incineration stirring means becomes excessive, the amount of the object to be supplied to the incinerator is reduced so as to reduce the load.

According to a sixth aspect of the present invention, a drying agitating means for agitating an object to be processed while rotating is provided in the dryer, and a drive load value of the dryer is a drive current of the drying agitating means. The purpose is to be a value. According to this method, fuzzy inference is performed based on the drive current value of the stirring means for drying.

The invention as set forth in claim 7 is characterized in that the dryer is provided with a rotary drum, and the drive load value of the dryer is a drive current value of the rotary drum. According to this method, fuzzy inference is performed based on the drive current value of the rotating drum.

According to an eighth aspect of the present invention, a drying stirring means for stirring the object to be processed while rotating in the dryer,
A rotary drum is provided, and the drive load value of the dryer is
It is a gist that at least one of the drive current value of the agitating means for drying and the drive current value of the rotating drum is used. According to this method, fuzzy inference is performed based on either the drive current value of the drying stirring means or the drive current value of the rotating drum.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, an incinerator 1 is a stirring type incinerator. In the incinerator 1, incineration as an incineration stirring means for stirring dried sludge while rotating. A stirring device 2 is provided. A drive motor of the incinerator agitator 2 is connected to an incinerator agitator current sensor S1 for detecting the load current value thereof. At the side of the incinerator 1, three incinerator burners 3A to 3C are provided as heating means. Each of the incineration burners 3A to 3C has a pair of nozzle tips, and a controller C described later turns on an electromagnetic valve (not shown) provided in each nozzle tip.
By performing the off control, a high combustion state in which both nozzles are operating, a low combustion state in which only one nozzle is operating, or a non-combustible state in which both nozzles are not operating are obtained.

In the incinerator 1, the residue (screen residue) is cut out through the residue conveyor 5 and the residue hopper 6. A combustion air supply pipe 4 is connected to the stirring device 2 of the incinerator 1. An incineration combustion fan 7 is provided in the combustion air supply pipe 4, and the combustion air (high-concentration odor) is sent into the incinerator 1 and incinerated by the incineration combustion fan 7. Further, the combustion air supply pipe 4 is provided with a damper 7a capable of opening and closing the supply pipe 4. The damper 7a is driven by a damper control motor M2. This damper control motor M
2 is driven by being opened / closed by a controller C described later.

An ash cooling conveyor 8 is provided below the incinerator 1, and the ash discharged from the incinerator 1 is ash cooling conveyor 8.
It is conveyed while being cooled by and is delivered to the ash conveyor 9. Ash is transported by the ash conveyor 9 to the ash hopper 1
0, and the ash in the ash hopper 10 is carried out of the system by a vehicle such as a truck.

An exhaust gas discharge port is provided at the upper part of the incinerator 1, and an incinerator exhaust gas temperature sensor 11 is provided at the exhaust port. The temperature sensor 11 detects the temperature of the exhaust gas discharged from the incinerator 1. The outlet of the incinerator 1 is connected to the dryer 13 via a connecting pipe 12 that constitutes an exhaust gas circulation path. The connecting pipe 12 is provided with a damper 14 capable of opening and closing the connecting pipe 12.
The damper 14 is driven to open and close by a pneumatic cylinder 14a. The pneumatic cylinder 14a is driven by opening / closing control of an electromagnetic valve provided in an pneumatic driving circuit (not shown) by a controller C described later.

The dryer 13 is a rotary and agitating dryer, and is equipped with a rotary drum 13a. Rotating drum 13
A drying stirring device 13b as a stirring device for drying which stirs sludge and the like while rotating is provided in the dryer 13 of a. The rotating drum 13a and the drying stirring device 13b
A dryer drum current sensor S2 and a dryer stirring current sensor S3 for detecting the load current value are connected to each of the drive motors. And, on the left end of the rotary drum 13a,
Dehydrated sludge cut out is supplied through a dehydrated sludge hopper 16 as a material hopper and its dehydrated sludge conveyor 16a.

The dewatered sludge conveyor 16a has a drive motor M1.
The rotation speed of the drive motor M1 is detected by the rotation speed detector S5. And the drive motor M1
The vertical fluctuation amount of the number of rotations is regarded as the amount of dehydrated sludge cut out from the dehydrated sludge hopper 16. The dehydrated sludge moves in the rotary drum 13a of the dryer 13 while being rotated and agitated by the drying agitator 13b.

The dewatered sludge is transferred to the incinerator 1 during its movement.
It is dried by the heat of the exhaust gas from and is transferred to the right end side of the rotary drum 13a. Further, the dried sludge transferred to the right end side is transferred to the conveyor 18 by the discharge conveyor 17 and stored in the intermediate hopper 19 by the conveyor 18. The intermediate hopper 19 is provided with a dry sludge level sensor L1 for detecting the level of the dry sludge stored therein. Then, the dry sludge in the intermediate hopper 19 is supplied to the incinerator 1 by being cut out via a dry sludge conveyor 19 a provided in the hopper 19. The dry sludge conveyor 19a is driven by a drive motor M3, and the amount of dry sludge cut out from the intermediate hopper 19 is determined by the rotation speed of the drive motor M3. The dried sludge is transferred to the dried sludge hopper 20 on the dried sludge conveyor 18 by opening and closing a damper 18a attached to the conveyor 18. The dried sludge in the dried sludge hopper 20 is carried out of the system by a vehicle such as a truck.

An exhaust gas exhaust port is provided on the upper right side of the dryer 13, and a gas exhaust pipe 26 constituting an exhaust gas circulation path is connected to the exhaust port. A dryer exhaust gas temperature sensor T1 is provided in the gas discharge pipe 26 at a position close to the discharge port of the dryer 13. Same temperature sensor T1
Thus, the temperature of the exhaust gas discharged from the dryer 13 is detected. The circulation connection pipe 22 that constitutes the exhaust gas circulation path has its inlet connected to the outlet of the dryer 13, and the outlet connected to the incinerator 1. This outlet may be connected to any place in the incinerator 1. The circulation connecting pipe 22 has the same connecting pipe 2
An opening / closing damper 23 capable of opening / closing 2 is provided. The open / close damper 23 is driven to open / close by the control motor 23a and can be controlled to an arbitrary open position. The control motor 23a is driven by being controlled to open and close by a controller C described later.

The gas discharge pipe 26 is connected to a discharge pipe 31 via a dust collector 25, a main damper 27 as an opening / closing means, an attracting fan 28 as an attracting means, a heat exchanger 29, and a deodorizing furnace 30. The dust collector 25 collects the dust in the exhaust gas discharged from the dryer 13 via the gas discharge pipe 26, and discharges the collected dust to the ash conveyor 9. Further, the purified exhaust gas is attracted by the attracting fan 28 and sent to the heat exchanger 29, where heat is exchanged and heated, and then deodorized in the deodorizing furnace 30. The deodorizing furnace 30 is equipped with a combustion burner 30a, and the odor in the exhaust gas is incinerated by the flame of the combustion burner 30a, and the heated and deodorized exhaust gas is heat-exchanged with the exhaust gas before deodorization by the heat exchanger 29. After that, the gas is discharged into the atmosphere through the exhaust stack 31. Further, the exhaust fan can transfer the exhaust gas from the dryer 13 to the incinerator 1 through the circulation connecting pipe 22 in which the opening / closing damper 23 is opened by the induction fan 28.

The damper 27 provided upstream of the induction fan 28 is opened and closed by the control motor M4. The control motor M4 is driven by being opened / closed by a controller C described later. Further, the opening amount of the damper 27 is detected by the damper opening sensor S4.

As shown in FIG. 2, the above-described dry incineration facility is provided with a controller C for performing fuzzy inference. On the input side of the controller C, the rotation speed detector S5, the drying sludge level sensor L1, the incinerator stirring current sensor S1, the dryer drum current sensor S2, the dryer stirring current sensor S3, the damper opening sensor S4, the drying The machine exhaust gas temperature sensor T1 is connected. The drive motors M1, M3, the damper control motor M2, and the control motor M4 are connected to the output side of the controller C.

Next, the operation flow of the dry incineration facility will be described. First, in the dryer 13, the exhaust gas from the incinerator 1 is supplied into the rotary drum 13a. In this state, when the dehydrated sludge is supplied from the dehydrated sludge hopper 16 into the rotary drum 13a of the dryer 13 by the dehydrated sludge conveyor 16a, the rotary drum 13a and the drying agitator 13b rotate to stir the sludge. While being discharged, it is discharged to the conveyor 18.
When the dried sludge is conveyed to the intermediate hopper 19 by the conveyor 18, the dried sludge is supplied to the incinerator 1 by the dried sludge conveyor 19a and is burned by the sludge residue hopper 6 by the sludge residue conveyor 6a. It is supplied to the furnace 1. Then, the residue and the dried sludge are incinerated in the incinerator 1, and the heat thereof is reused as exhaust gas in the dryer 13.

Further, the exhaust gas supplied into the rotary drum 13a is deprived of heat by drying to reach about 200 ° C., is attracted by the induction fan 28, passes through the heat exchanger 29 and the deodorizing furnace 30, and is then discharged. It is discharged to the outside of the dry incineration facility through the cylinder 31, and is supplied into the incinerator 1 through the circulation connecting pipe 22.

Next, the operation control method of the dry incineration facility will be described. The controller C performs fuzzy inference so that operation control can be performed with good combustion efficiency. That is,
Dewatered sludge cut-out amount in dewatered sludge hopper 16, level of dried sludge in intermediate hopper 19, incinerator agitator 2
Of the load current value of the rotary drum 13a, the load current value of the agitating device 13b for drying, and the opening amount of the damper 27 of the attracting fan 28 as the condition parts, and the sludge cut-out amount from the dehydrated sludge hopper 16 and the incineration combustion. The controller C performs fuzzy inference based on the conclusions of the amount of combustion air from the fan 7, the amount of dried sludge cut out from the intermediate hopper 19, and the set value of the dryer exhaust gas.

In each element of the condition section, the number of rotations of the dehydrated sludge conveyor 16a in the dehydrated sludge hopper 16 (dewatered sludge cut-out amount) is detected by the rotational speed detector S5, and the intermediate hopper 1
The level of the dry sludge in 9 is the dry sludge level sensor L
1, the load current value of the incinerator agitator 2 is detected by the incinerator agitator current sensor S1, and the rotary drum 13a
Load current value of the dryer drum current sensor S2, the load current value of the drying agitator 13b is detected by the dryer agitator current sensor S3, and the damper 2 of the induction fan 28 is detected.
The opening amount of 7 is detected by the damper opening amount sensor S4.

Based on these detection results, the controller C controls the amount of dewatered sludge cut out from the dewatered sludge hopper 16 by changing the rotation speed of the drive motor M1 to drive the drive motor M3.
The amount of dry sludge cut out from the intermediate hopper 19 is controlled by changing the number of revolutions of the exhaust gas, the amount of combustion air from the incineration combustion fan 7 is controlled by the damper control motor M2, and the temperature of the exhaust gas discharged from the dryer 13 is set. To control.

Here, the dehydrated sludge hopper 1 in the condition section
6, the number of rotations of the dehydrated sludge conveyor 16a (cut-out amount of dehydrated sludge), the level of the dried sludge in the intermediate hopper 19, the load current value of the incinerator agitator 2, the rotary drum 13a.
3 (a) to FIG. 3 (a) to FIG.
It is defined as "large", "medium", and "small" as shown in (d). It should be noted that the dryer drum current value, the dryer agitation current value, and the incinerator agitation current value shown in FIG. 3C are “large”, which means that each current value is high, and “small” is low. Means
Moreover, the large amount of dewatered sludge hopper cut-out amount shown in FIG. 3A means that it is large, and the small amount means that it is small. Furthermore, the intermediate hopper level shown in FIG. 3 (b) being "large" means that it is high.

Further, in the conclusion section, the amount of dehydrated sludge cut out from the dehydrated sludge hopper 16, the amount of dried sludge cut out from the intermediate hopper 19, the amount of combustion air, and the set temperature of the dryer exhaust gas temperature sensor T1 are the experience of the operator. Based on the following, as shown in Table 1,
"↓↓", "↓", "↑↑", and "↑" are defined.

[0032]

[Table 1]

The rules combining "large", "medium", and "small" in each element of the condition part thus defined can be set in about 72 ways in consideration of their importance. Part of this rule is shown in Tables 2 and 3.

[0034]

[Table 2]

[0035]

[Table 3]

In Tables 2 and 3, the conclusion is "XX".
The part indicated by shows the state that is impossible in reality,
The part indicated by "-" indicates that nothing is done. Therefore, regarding specific fuzzy inference, some control states will be described by selecting from the above valid rules.

For example, according to Rule 7 in Table 2, the dryer drum current value or dryer agitation current value in the condition section is "large", the amount of dewatered sludge cut out is "large", and the incinerator agitation current value is "medium". In the following, the control is defined when the induction fan damper opening is “medium” or less and the dry sludge cutout amount is “large”. In this case, when the dryer drum current value or the dryer agitation current value is high, the rotating drum 13a or the drying agitator 1 is operated even if the dehydrated sludge hopper cutting amount is "large".
3b is overloaded. That is, the dryer 13
When the water content of the dry sludge inside is high, the dry state is poor. If the level of dry sludge in the intermediate hopper 19 is high, the dry incineration facility may stop. Therefore, the controller C lowers the rotation speed of the drive motor M1 to reduce the amount of dehydrated sludge cut out from the dehydrated sludge hopper 16, and the dryer 13
The temperature of the exhaust gas from is set high to improve the drying efficiency.
Further, the controller C increases the rotation speed of the drive motor M3 to increase the amount of dry sludge cut out from the intermediate hopper 19 and prevent the dry incineration facility from stopping. At the same time, as the dry sludge cut-out amount increases, the controller C controls the damper control motor M2 on the open side in proportion to the increase of the dry sludge cut-out amount to increase the combustion air amount.

Also, in Rule 5 in Table 2, unlike Rule 7, when the induction fan damper opening becomes "large",
Although it is necessary to keep the internal pressure of the incinerator 1, the gas discharge pipe 26, etc. at a negative pressure in order to discharge the incineration exhaust gas, there is no room for attraction. Therefore, in order to prevent the internal pressure of the incinerator 1, the gas discharge pipe 26, etc. from becoming a positive pressure, the controller C keeps the combustion air amount as it is without controlling the damper control motor M3, and reduces the dry sludge cut-out amount. . Furthermore, in Rule 3 in Table 2, unlike Rule 7,
When the incinerator current value becomes "large", the moisture content of sludge that is incinerated is high, and the incineration efficiency is poor. Therefore, the controller C reduces the amount of dewatered sludge cut out from the dewatered sludge hopper 16 in order to reduce the drive load of the incineration agitator 2, and sets the exhaust gas temperature of the dryer 13 to a high level to reduce the moisture content of the dried sludge. To allow stable incineration in the incinerator 1.

Further, according to rule 48 in Table 3, the dryer drum current value or the dryer stirring current value in the condition section is "medium", the dewatering sludge hopper cutout amount is "small", and the incinerator stirring current value is "medium". Below, the control is defined when the induction fan damper opening is "medium" or less and the intermediate hopper level is "large". The operating condition in this case is that the amount of cut-out from the dehydrated sludge hopper 16 is small and the dry incineration efficiency is poor, despite having sufficient drying and incineration capabilities. Therefore, the controller C increases the amount of dehydrated sludge cut out from the dehydrated sludge hopper 16 and enhances the dry incineration efficiency. Further, the controller C maintains the current incineration and drying capacity without setting the exhaust gas temperature from the dryer 13 and controlling the drive motor M3 and the damper control motor M2.

In addition, according to rule 56 in Table 3, the dryer drum current value or dryer agitation current value in the condition section is "small", the amount of dewatered sludge cut out is "large", and the incinerator agitation current value is "medium". Below, the control is defined when the induction fan damper opening is below "medium" and the amount of dried sludge cut out is below "medium".
In this case, the operating condition is the rotating drum 13 of the dryer 13.
a, a large amount of dehydrated sludge is supplied from the dehydrated sludge hopper 16 to the dryer 13, and a large amount of dried sludge is supplied from the dryer 13 to the incinerator 1. Is being supplied. Therefore,
Since this is an ideal operating condition, the controller C does not control the dewatered sludge cutout amount, the setting of the dryer exhaust gas temperature, the dried sludge cutout amount, and the combustion air amount.

This embodiment has the following effects (1) to (5). (1) Since the amount of combustion air sent to the incinerator 1 is controlled in proportion to the amount of dried sludge cut out from the intermediate hopper 19, it is possible to prevent the air ratio in the incinerator from fluctuating. Therefore, it is possible to prevent the dry sludge from being discharged to the outside of the dry incineration facility as it is incompletely burned, and to prevent the deterioration of fuel efficiency, and to prevent the combustion efficiency in the incinerator 1 from decreasing.

(2) Since the dry sludge level sensor L1 provided in the intermediate hopper 19 sets the level of the dry sludge as an element of the condition section in the fuzzy inference, it is possible to prevent the dry sludge from overflowing from the intermediate hopper 19. Therefore, it is possible to prevent the peripheral equipment from breaking down due to the sudden stop of the operation of the dry incineration equipment, the operating efficiency of the equipment is lowered, and the dry sludge overflowing to the equipment around the intermediate hopper 19 is generated. Therefore, it is possible to prevent those devices from breaking down.

(3) Under the control of the control motor M4, the opening amount of the main damper 27 of the induction fan 28 on the gas exhaust pipe 26 is used as an element of the condition part of the fuzzy reasoning.
Therefore, when the opening is fully open, the combustion air that exceeds the allowable discharge amount of the induction fan 28 will not be supplied to the incinerator 1. Therefore, the incinerator 1 and the gas discharge pipe 26
There is no positive pressure inside, and since it is always kept in a negative pressure state, incinerator exhaust gas can be reliably discharged, and exhaust gas leaks from devices such as the incinerator 1 and the gas exhaust pipe 26, and those devices are It is possible to prevent damage in advance.

(4) Since the incinerator agitator 2 for agitating the dried sludge while rotating is provided in the incinerator 1 and the rotational load of the incinerator agitator 2 is used as an element of the condition section, the incinerator agitator is used. When the rotational load of 2 is high, the intermediate hopper 1
By reducing the amount of the dried sludge cut out from No. 9, it is possible to prevent the rotational load from exceeding the allowable value and prevent the breakdown of the incinerator agitator 2.

(5) Since the rotating load of the incineration stirring device 2, the rotating drum 13a of the dryer 13 and the drying stirring device 13b is a current value proportional to the load, the rotating torque is conditioned by a complicated control method. Fuzzy control can be realized with a control method that is easier and cheaper than using elements as parts.

The present invention may be configured as follows in addition to the above embodiment. (A) In the above embodiment, the intermediate hopper 19 is provided between the incinerator 1 and the dryer 13, but it may be omitted and only the dry sludge conveyor 19a may be provided.

(B) In the above embodiment, the intermediate hopper 1 is used as one of the elements in the condition part in fuzzy inference.
Although the dry sludge level of 9 is set, a weight sensor may be provided in the intermediate hopper 19 to set the weight of the dry sludge detected by the weight sensor.

(C) In the above embodiment, the number of rotations of the dehydrated sludge conveyor 16 in the dehydrated sludge hopper 16 is taken as the amount of the dehydrated sludge cut out from the hopper 16, but the fluctuation of the sludge weight or the vertical fluctuation of the dehydrated sludge level. May be the amount of dewatered sludge cut out.

(D) In the above embodiment, the driving load values of the incineration stirring device 2, the rotary drum 13a of the dryer 13 and the drying stirring device 13b are all set as the load current value, but the torque value is used as the condition part. It is also possible to With this configuration, the drive load values of the incineration stirring device 2, the rotary drum 13a, and the drying stirring device 13b are highly accurate, and fuzzy control with even higher combustion operation efficiency can be performed.

(E) In the above embodiment, the load current value of the rotary drum 13a of the dryer 13 or the drying stirring device 13b.
Although one of the load current values is used as the condition part of the fuzzy inference, both current values may be used as the condition part.

Next, technical ideas other than the claims that can be understood from the above-described embodiment will be described together with their effects. (A) The operation control method of the dry incineration facility according to any one of claims 1 to 5, wherein the drive load value of the incineration stirring means is a drive current value for driving the incineration stirring means. According to this method, the operation of the dry incineration facility can be easily controlled.

(B) The drying agitator for agitating an object to be processed is provided in the dryer, and the driving load value of the dryer is a rotational torque value of the agitator for drying. The operation control method for the dry incineration facility according to claim 5. According to this configuration, fuzzy control with higher combustion operation efficiency can be performed.

(C) The dryer is provided with a rotary drum, and the drive load value of the dryer is a rotary torque value of the rotary drum. Operation control method. According to this configuration, fuzzy control with higher combustion operation efficiency can be performed.

[0054]

According to the invention described in claim 1, since the air ratio in the incinerator can be made constant, it is possible to prevent the combustion efficiency from decreasing.

According to the invention described in claim 2, according to claim 1,
In addition to the effect of the invention described in (1), even if the operation of the dry incineration facility is stopped, the unburned object to be treated can be temporarily stored, so that it can be surely incinerated.

According to the invention of claim 3, claim 2
In addition to the effect of the invention described in (1), it is possible to prevent the object to be processed from overflowing from the intermediate hopper, so that it is possible to prevent the operating efficiency of the dry incineration facility from being lowered.

According to the invention of claim 4, claim 1
In addition to the effects of the invention described in any one of claims 3 to 3,
The amount of heat for drying can be increased or decreased without supplying excess combustion air to the incinerator.

According to the invention of claim 5, claim 1
In addition to the effects of the invention described in any one of claims 4 to 4,
It is possible to prevent an excessive drive load from being applied to the incineration stirring means, and prevent damage to the incineration stirring means.

According to the invention of claim 6, claim 1
In addition to the effects of the invention according to any one of claims 5 to 5,
The operation of the dry incineration facility can be controlled more easily than when the torque value of the stirring means for drying is set to the driving load.

According to the invention of claim 7, claim 1
In addition to the effects of the invention according to any one of claims 5 to 5,
The operation of the dry incineration facility can be controlled more easily than when the torque value of the rotating drum is used as the driving load.

According to the invention described in claim 8, claim 1
In addition to the effects of the invention according to any one of claims 5 to 5,
Since only one of the drive current value of the drying agitating means and the drive current value of the rotary drum may be used as the condition section, it is possible to prevent an increase in equipment cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a dry incineration facility according to an embodiment.

FIG. 2 is a block diagram showing a fuzzy controller of the dry incineration facility.

3 (a) to 3 (d) are explanatory views showing a membership function of a condition part in fuzzy inference.

[Explanation of symbols]

1 ... incinerator, 2 ... incineration stirring device (incineration stirring means),
12 ... Connection pipe (exhaust gas circulation path), 13 ... Dryer, 13a
... Rotary drum, 13b ... Drying stirring device (drying stirring means), 16 ... Dewatered sludge hopper (processing object hopper), 19
... Intermediate hopper, 22 ... Circulation connecting pipe (exhaust gas circulation path), 2
6 ... Gas pipe exhaust pipe (exhaust gas circulation path), 27 ... Damper (opening / closing means), 28 ... Induction fan (induction means), 3A to 3C
… Incineration burner (heating means).

Claims (8)

[Claims] 1. A to-be-processed object hopper into which a to-be-processed object is charged, a dryer for drying the to-be-processed object discharged from the to-be-processed object hopper, and a heating means for heating the to-be-processed object discharged from the dryer. An incinerator that incinerates at, a combustion air supplier that supplies combustion air to the incinerator, an exhaust gas circulation path that forms a circulation path between the dryer and the incinerator, and a downstream side of the dryer. It is provided on the exhaust gas circulation path and is provided with an attracting means for drawing the exhaust gas from the incinerator into the dryer, and the exhaust gas from the incinerator is used to dry the object to be processed in the dryer, and the dried object to be processed is In the operation control method of the dry incineration facility, which uses the exhaust gas re-supplied via the attraction means to incinerate the object to be incinerated in the incinerator, the amount of the object to be extracted from the object hopper, With the drive load value of the dryer as the condition part, And the object to be processed cut emissions from the object hopper, the temperature of the exhaust gas discharged from the dryer, and the object to be treated supply to the incinerator,
A method for controlling the operation of a dry incinerator that performs fuzzy inference based on the conclusion of the amount of combustion air supplied to the incinerator. 2. The dry incineration according to claim 1, wherein an intermediate hopper is provided between the dryer and the incinerator, and the amount of the material to be treated supplied to the incinerator is the amount cut out from the intermediate hopper. Operation control method for equipment. 3. The operation control method for a dry incineration facility according to claim 2, wherein the fuzzy inference is performed by adding the amount of the object to be processed stored in the intermediate hopper to the condition section. 4. An exhaust gas circulation path between the dryer and the attracting means is provided with opening / closing means for opening / closing the circulation path, and fuzzy inference is performed by adding the opening degree of the opening / closing means to the condition part. The operation control method of the dry incineration facility according to any one of claims 1 to 3. 5. An incineration stirring means for stirring an object to be processed is provided in the incinerator, and fuzzy inference is performed by adding a driving load value of the incineration stirring means to the condition section. The operation control method of the dry incineration facility according to claim 4. 6. A dryer stirring means for stirring a workpiece while rotating is provided in the dryer, and a drive load value of the dryer is a drive current value of the dryer stirring means. The operation control method for the dry incineration facility according to claim 5. 7. The drying incineration facility according to claim 1, wherein the dryer is provided with a rotary drum, and the drive load value of the dryer is a drive current value of the rotary drum. Operation control method. 8. A dryer stirring means for stirring the object to be processed while rotating and a rotating drum are provided in the dryer.
The drive load value of the dryer is at least one of a drive current value of a stirring device for drying and a drive current value of a rotating drum, and the dry incineration facility according to any one of claims 1 to 5. Operation control method.