JPS6099090A - Separation of receiving substance and waste - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is useful for separating a liquid into a receiver and a waste, thereby removing heavy contaminants from the liquid;
BACKGROUND OF THE INVENTION Cyclones are commonly used to separate contaminants from liquids. In the manufacture of paper, if the separation is carried out to remove contaminants that are denser than the liquid, approximately 0
．． A slurry of paper fibers and water consisting of 7% by weight fibers is
It is introduced into a conical separator, usually with a lowermost apex, via an inlet recessed from said apex. As a vortex is formed in the conical chamber of the separator, the heavy contaminant particles move to the walls of the cone and then downward to the apex where they are discharged and proceed to the outlet with a good ratio of paper fibers. Most of the fibers and water substantially liberated from the heavy contaminants are discharged through an axial outlet passage located at the inlet end of the cone opposite the apex.

The fibers and water discharged from both outlets are directed to the second chamber to undergo the next separation step. The light fraction of contaminants can also be removed by using an axial outlet tube located coaxially within the water and fiber outlet or at the apex coaxially with the apex orifice.

One of the disadvantages of said type of separator is that a substantial proportion of the good fibers flows out with the M waste, and a second, third and often fourth separator is required to recover the good fibers. This means that it is necessary to establish a group. The above facts result in undesirable additional pump suction and invested capital.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a means of minimizing fiber losses in hydraulic Zyclone and/or other splitter systems with similar evacuation devices.

SUMMARY OF THE INVENTION According to one feature of the invention, a separator with a waste outlet leading to a waste chamber is used to separate the liquid into receiver and waste. In the method, supplying the separator with a liquid to be subjected to separation and passing another liquid through the waste chamber for discharging waste from the separator through the waste outlet. , controlling liquid through the waste chamber to substantially prevent the passage of receptacles while allowing the passage of waste; - thereby controlling the flow of liquid through the waste outlet; A method is provided comprising:

Although it is desirable to prevent the passage of receptacles, a small amount of receptacles may be passed through the separator to the waste chamber along with the waste. However, the flow of acceptor from the separator is greatly reduced compared to the flow that would occur in conventional separators that do not utilize the features of the present invention.

According to one embodiment, said fact controls the pressure of the fluid flowing through the evacuation chamber, and according to another embodiment, the amount of fluid passing through the evacuation chamber. .

Preferably, the waste chamber circulates the waste liquid through the circulation path;
A drainage system consisting of a pump that pressurizes the drainage chamber, a valve that controls the liquid flow rate and liquid pressure in the circulation path, an auxiliary separation means that removes contaminants from the liquid, and a means that supplies only the removed liquid to the circulation path. It forms part of the waste circulation route.

The above method can be used to remove heavy or light waste. That is, the waste circulation path may lead to a light outlet or a heavy outlet. After that, the pollutants separated by the above method.

It is a heavy object or a light object according to the above application example.

According to an embodiment of the invention, heavy particles (
The slurry to be clarified is passed through a separator having an outlet for waste (waste) and passed through a liquid waste chamber for discharging the waste flowing down said opening, with a connection between the separator and the waste chamber. A method for separating M-contaminants from fiber and slurry liquid is provided which comprises controlling the flow of liquid through a waste chamber such that no or substantially no liquid flows through the opening at the time.

More specifically, one or more valves are provided to control the hydraulic pressure flowing through the waste chamber rather than the flow rate.

According to another feature of the invention, a device for controlling the passage of a liquid to a waste outlet of a separator for separating the liquid into a receiver and a waste, the apparatus comprising: an exit opening; means for passing another liquid into said disposal chamber for discharging waste through said disposal outlet; and means for substantially preventing passage of a receiver while allowing passage of waste. Means are provided for controlling the flow of liquid through the waste chamber and thereby controlling the flow of liquid through the waste outlet in order to prevent this from occurring.

The means for passing another liquid into the discharge chamber and the means for controlling the liquid passing through the discharge chamber include the inlet and outlet of the waste circulation path;
Consists of a pump and each valve.

Pumps and valves make it possible to control the pressure in the reject chamber, thereby controlling the passage of accept and 411 waste from the separator.

According to an embodiment of the invention, there is provided a device for controlling liquid passing through a waste outlet of a separator, the device comprising: a passageway or a chamber in which the outlet is open; the liquid flows through said passageway; Apparatus is provided for discharging waste material flowing down the opening and for controlling the flow of liquid through the passageway such that there is substantially no flow of fiber and slurry liquid from the separator through the opening.

The device described above is particularly suitable for use with a cyclone separator, but may also be used with any other separator having a similar rejection device.

The device is provided with means for controlling the pressure at the opening of the passageway or chamber.

Preferably, said means consist of one or more valves in the circuit defining the waste circulation path and connecting with the waste chamber. In order to remove contaminants from the liquid in the waste circuit, it is preferred to provide an auxiliary separator in the waste circuit itself. When removing heavy or light contaminants, the above-mentioned apparatus may be provided with a suitable disposal chamber in each state, ie at the light outlet or at the M figurine outlet.

In one embodiment, the waste chamber is cylindrical and coaxial with the waste outlet of the separator. The inlet and outlet of the rejection chamber intersect in a manner analogous to the linear dimension or chord of said chamber "KW" and are substantially perpendicular to the axis of the separator outlet.

In another embodiment, the waste chamber is a tubular passage, the axis of which is arranged at right angles to the axis of the waste outlet.

The present invention also provides a separator device with an inlet for liquids subjected to separation, displacing waste in at least one outlet while collecting accepts in the other outlet, to provide a flow to said device. means for causing at least one outlet for the waste opening of the or each waste passageway or chamber; passing another liquid into the waste chamber for the purpose of discharging the waste passing through the waste outlet; means for controlling the liquid through the waste chamber to substantially prevent the passage of the receptacle while allowing the passage of the waste;
This provides an apparatus for separating liquid into receiver and waste, comprising means for controlling the flow of liquid through said waste outlet.

According to one embodiment, the hydraulic pressure flowing through the evacuation chamber is controlled.

According to other embodiments, the volume of liquid in the waste chamber is controlled.

According to another embodiment of the invention, a separator is provided with an inlet for the fibers and the slurry liquid, the heavy contaminants being transferred to one outlet, and the fibers and the slurry liquid being substantially freed from said heavy contaminants. comprises means for producing a flow in the device, which is collected at the other outlet, and an outlet for the waste opening of the passage or chamber through which the liquid flows, for the purpose of discharging the waste flowing down the opening;
controlling the flow of liquid through the passageway or chamber such that fiber and slurry liquid substantially does not flow through the opening;
An apparatus for removing heavy contaminants from fiber and slurry liquids is provided.

Since the liquid circulates through the circulation path, the waste chamber is preferably a part of the waste circulation path that combines a pump and a valve to control the liquid pressure and/or the amount of liquid. .

If the above-mentioned device is for removing only heavy contaminants, it is preferable to arrange the waste outlet below the inlet, and the heavy contaminants are removed from the waste chamber from the waste outlet. flows down through the

If the up-and-down device is for removing light dirt, the device can be reversed so that the dirt floats upward to the waste outlet.

If the above separator is designed to remove both heavy and light pollutants, then the flI is an inverted vortex separator for heavy waste removal and a single-flow separator for light weight removal downstream of it. In this case, two outlets are provided at opposite upper and lower ends of the device, each leading to a light waste chamber and a heavy waste chamber, respectively.

According to the invention, contaminants are removed in an effective manner with virtually no fiber loss.

A valve is used to control the amount and pressure of liquid passing through the waste chamber, and a sensor is provided to measure the liquid pressure characteristics or the amount of liquid flowing through the waste circulation path. and the desired value; automatically fi! I will control you.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be further explained by way of example only with reference to the accompanying drawings, in which: FIG.

Referring to FIG. 1, a cyclone separation bidiagnostic separator is indicated at 1. The separator has a conical shape with its lowest apex and an outlet 8 (flff) at the apex 5.

The inlet is indicated by 2 and the other exit numbers are also indicated by 6. An orifice 8 opens into a cylindrical chamber 7, which is arranged coaxially to the axis of the conical separator 1. As shown in chamber 7, an inlet passage and an outlet passage are provided. intersects the chamber 7 tangentially or chordally.The chamber 7 forms part of the waste circulation, the side of which is shown in FIG. 3.FIG. 2c. shows another embodiment in which the passage 9.10 acts as the chamber 7, i.e. the chamber is tubular rather than cylindrical and its axis is arranged at right angles to the opening axis, said axes intersecting. are doing.

In the embodiment shown in FIG. 2, the separator 1 operates according to the reverse vortex principle. That is, the dirty paper fibers and slurry liquid enter the separator through the inlet 2, and a downward spiral vortex is generated in the separator, displacing the heavy material to the wall 4 of the separator and then towards the apex 5. Proceed downward. The fibers and liquid substantially freed from the weight move upwards and are discharged through the outlet 6.

According to the embodiment described above, the invention is provided with means for recovering heavy objects from the outlet opening 8 while preventing the removal of fibers and water. This is achieved by passing the liquid into the waste chamber in such a controlled manner that any tendency of the liquid in the separator to flow out of the opening is counteracted by the pressure exerted by the liquid flowing through the circuit. In practice, the above is achieved by regulating the flow rate and hydraulic pressure of the waste circuit. For the above purpose, valves 11.12.
20 is provided.

One arrangement for the waste circuit is shown in FIG.

The circuit includes a tank 14 containing a suitable liquid such as water, a pump 15 for circulating water through the circuit, and an auxiliary separator for removing heavy substances from the water in this embodiment in the waste circulation circuit. It consists of The outlet 9 from the evacuation chamber is the valve 1
2 and 20 and communicates with the tank 14. The inlet 10 to the waste chamber is fed from the tank 14 via an auxiliary separator 16, and a valve 11.17 is provided to control the flow rate. The pressure value is set by valve 20.

A system implemented with the purpose of measuring the pressure in the evacuation chamber with a pressure gauge 13 may be operated as follows.

Close the valves 11,12 and operate the conical separator 1 under normal conditions. There is a flow through the orifice 6.2 but not into the chamber 7. The pressure PR is recorded. Next, valve 18.
19 is closed and valves 11, 12 and 20 are opened. The pump 15 is started and the valve 20 is adjusted so that the pressure value PR is the same as previously recorded but there is substantially flow in the waste circuit. Then stop the pump. When the valves and pressures are set, the system can be fully operated. Shortly after starting the waste circuit pump, start the conical separator pump and close valve 18.19.11.1.
2 and leave the valve 20 at the setting reached as above.

When a steady state is reached, a zero or microflow exists in the orifice 8. Pressure values PR are recorded during two setting operations. The heavy contaminants migrate to the wall 4 and finally to the tip 5 of the separator.
Move to. Although there is virtually no flow in the orifice 8, due to the density of the dirt particles and the pressure fluctuations in the system, the dirt particles flow down into the chamber 7 and are discharged in the waste circuit. An auxiliary cyclone 16 is included in the circuit to prevent unacceptable build-up of contaminants in the circuit. A drainage chamber is provided below the conical apex of the cyclone, similar to chamber 7, but instead of a through flow, a valve 22 is provided.
The only exit from the chamber is through the. Valve 22 is opened periodically to clear the chamber and circuit. Valve 23 is used to replace liquid losses.

Tests with the above device were successfully performed on stock containing synthetic plastic particles. Synthetic plastic particles were effectively removed and fiber losses in the waste circuit were found at pollutant concentrations of the order of 0 to 1.4%. Similar tests using the cyclone screener without the control orifice of the present invention resulted in fiber rejection of 11 inches to 18%. The test apparatus was a full-sized device, but constructed of transparent materials to simplify set-up and operating procedures.

It is anticipated that commercially available selectors will require some type of system to actually control valve 20 and control the periodic flow of the auxiliary selector through valve 22. This can be done in a variety of ways, but reference is made below to Figures 4, 5 or 6 showing various other arrangements.

If there is no flow in the circuit, the 24 tanks 14 shown in FIG.
The liquid level remains unchanged and valve 22 remains closed. The rise and fall of the liquid level in the tank is therefore due to the flow from the separator through the orifice 8.

Therefore, the zero flow criterion in the orifice 8 can be easily maintained by the liquid level control system (FIG. 4). For only small changes, the free surface of the bath 14 must be small in order to obtain the necessary sensitivity.

A liquid level control device consisting of a sensor 25, a control unit 26 and an automatic valve 20 controls the pressure PR in the chamber 8 so that there is no flow through the orifice 8. - The system is as accurate as normal liquid level control, since the rise in liquid level 24 requires the closing of valve 20. During the installation experiment, bypass valve 3
1 was found to be useful. In a test for automatic liquid level control using the valve 20, the valve is always vibrated near its intermediate position under normal operating conditions. It also ensures that the waste circuit never closes.

This protects the system from full pump pressure if system instability or operator error causes the valve to close.

A bypass valve 31 is likewise included in the apparatus shown in FIGS. 5 and 6.

The rest of the control system requires a microprocessor 27 programmed with known equilibrium pressures "A,""F," and "R" (FIG. 5) that control the PR by means of the control valve 20.

Another method is to include a short parallel or conical extension 29 below the orifice 8 (FIG. 6), which separates the substantially clean waste circuit water from the substantially opaque separator. The interface between the material and the paper stock is monitored.

Marking materials can be added to the waste circuit to sharpen the interface. A distinct type uses dyes.

The type of product may include magnetic, optical, ultrasonic, radioactive, visual or other sensors 28. Sensor 28 can be a miniature flow meter. By whatever means, the sensor sends a signal to the controller 27 which controls the pressure PR by means of the operating valve 20 to substantially prevent flow through the orifice 8.

Test data shows that 10 selectors require only one auxiliary device, thus providing significant potential energy and capital savings over conventional equipment using multiple steps. The cost of transducers and instruments is offset by their inclusion in the entire factory monitoring system.

Referring now to Figures 7a and 7b, there is shown an apparatus for use in removing light contaminants from liquids such as fibers and slurry liquids. The lightweight contaminants may be plastic materials or oil particles. The device of Figure 7a has an inlet 2' for the liquid to be purified and an outlet 3 for the light waste.
7 and an outlet 39 for the purified liquid. The light waste outlet 37 leads to a dumping chamber 41, which may be provided with a structure corresponding to the device described in FIGS. 2, 2b or 2c. The separator is of the unidirectional flow type. Substantially, the light object removal device is a reversal of the device in section 1, the entire waste circulation path corresponding to that described with respect to FIG.
a corresponding valve 11' for controlling the pressure and flow of 1;
12' and 20'. A sifter 16' is also provided to purify the liquid in the waste circuit. This constitutes a lightweight waste removal device. All other equipment includes:
The same reference numerals as those used in FIGS. 2 and 3 are used.

Similarly, the device of FIG. 7b consists of a separator 35 with the same reference numerals, an inlet 2'' for the liquid to be purified and an outlet 3'' for the light waste.
7// and a purified liquid outlet 39''.

The separator has a conical shape and has an outlet 39'' at its lowest apex and an inlet 2'' and an outlet 37'' at the other end. The outlet 37'' leads to a waste chamber 41''. The waste chamber 41'' is part of a waste circuit with an inlet 10'' and an outlet 9'' and is substantially identical to that described with respect to FIG. 7a. A auxiliary separator 16'' of a different shape is used. The separator 35'' and the auxiliary separator 16'' are reversed with the lightweight separator.

The operation of the apparatus of Figures 7a and 7b is substantially the same as in the case of heavy load removal, with the pressure in the depletion chamber being controlled so that there is substantially no flow from the separator into the waste circuit. No liquid flows through the outlet opening, only light pollution exits.

The separator devices of FIGS. 3 and 7 may be combined into a single device for removing heavy and light materials, with each waste outlet provided in a waste circuit.

[Brief explanation of the drawing]

FIG. 1 is a view from a weight-contamination perspective according to one aspect of the invention; FIG. 3 is a schematic diagram of an apparatus according to the invention showing the waste circulation circuit; FIGS. FIG. 6 is a schematic diagram illustrating another device for maintaining desired flow characteristics, FIG. 7a.
Figures 7b and 7b are schematic illustrations of a waste treatment device according to the invention for removing light pollution. 1... Cyclone separator, 2, 2', 2''... Inlet, 3... Vortex, 4... Wall, 5... Apex, 6... Outlet, 7
...Cylindrical chamber (discharge chamber), 8...Outlet, 9,9"...Exit passage, ], 0, 10"...Inlet passage, 11.11'
...Valve, 12.12'...Valve, 13...Pressure gauge, 214
・・Tank, 15I・Pump, 16.16', 16" ・・
Auxiliary separator, 17, 18, 1.9... Valve, 20, 2
0'...Valve, 21...Discharge chamber, 22.23...Valve, 24
...Liquid level, 25..Sensor, 26..Control unit good [,
27..Microprocessor, 28..Sensing6.29.
・Extension part, 30・・Interface, 31 ・・ノ(Innox valve, 35・・Separation chamber, 37; 37″・・Outlet, 3
9゜39''... Exit, 41... Disposal chamber. FI G, 2b FI G, 2c FI G, 3 FIG, 5 FIG, 6 1 - Scream

Claims (1)

[Claims] In the method of separating a liquid into a receiving material and a waste material using a separator having a liquid inlet, a receiving material outlet, a waste material outlet, and a waste chamber communicating with the waste material outlet, supplying a separator with a liquid to be subjected to separation; passing another liquid through the waste chamber for discharging waste from the separator through the waste outlet; controlling the flow of liquid through the waste chamber, thereby controlling the flow of liquid through the waste outlet, to substantially prevent the passage of the receiver while allowing the passage of the waste material; 4' How to separate from Jto cultural relics.