JP2021094488A - Kneading system - Google Patents

Abstract

To provide a kneading system capable of suppressing cost price of an active material mixture.SOLUTION: A kneading system 1 includes a kneader 10, a circulation path 20, and a pump 30. The kneading system 1 includes a centrifugal concentrator 70 for separating a solvent S3 from an active material mixture Em, a first bypass pipe 61, a first three-way valve 501 that connects the circulation path 20 and the first bypass pipe 61 and switches between a closed state where the first bypass pipe 61 and the circulation path 20 are not communicated with each other and an open state where the first bypass pipe 61 and the circulation path 20 are communicated with each other; a second bypass pipe 62; and a second three-way valve 502 that connects the circulation path 20 and the second bypass pipe 62, and switches between a closed state where the second bypass pipe 62 and the circulation path 20 are not communicated with each other and an open state where the second bypass pipe 62 and the circulation path 20 are communicated with each other. When the solvent S3 is charged into a container 11 and insides of the kneader 10 and the circulation path 20 are cleaned, the first three-way valve 501 and the second three-way valve 502 are in the open states.SELECTED DRAWING: Figure 1

Description

The present invention relates to a kneading system.

As described in Patent Document 1, raw materials containing an active material, a binder, and a solvent are kneaded by a kneader.
The kneader has a container into which the raw materials are charged, and kneads the raw materials in the container to produce a slurry-like active material mixture. A plurality of pipes are connected to the container. A circulation path for circulating the active material mixture to the container is formed by a plurality of pipes. A pump is provided in the circulation path, and the active material mixture is circulated to the container through the circulation path by the pump.

After the active material mixture is produced, the inside of the kneader and the circulation path is washed. It is preferable to disassemble and clean the kneader, circulation path, and pump, but it is cleaned and reactivated by the man-hours for disassembling the kneader, circulation path, and pump, and the man-hours for reassembling the kneader, circulation path, and pump. It takes time to produce the substance mixture. Therefore, it is possible to clean the inside of the kneader and the circulation path by putting the solvent as a raw material into the container and circulating the solvent in the circulation path by the pump without disassembling the kneader, the circulation path and the pump. preferable.

Japanese Unexamined Patent Publication No. 2018-098098

By the way, in the circulation cleaning method in which the solvent is circulated in the circulation path, it is necessary to carry out the circulation cleaning a plurality of times because the active material mixture remains in the kneader and the circulation path only by performing the circulation cleaning once. Yes, a large amount of solvent will be used. Therefore, the cost of manufacturing the active material mixture becomes high.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a kneading system capable of suppressing the cost of an active material mixture.

A kneading system that solves the above problems has a container in which raw materials containing an active material, a binder, and a solvent are charged, and kneads the raw materials in the container to produce a slurry-like active material mixture. A kneader, a circulation path connected to the container and circulating the active material mixture in the container, and a pump connected to the circulation path and circulating the active material mixture in the container through the circulation path. A kneading system comprising: a centrifugal concentrator that separates the solvent from the active material mixture, a first bypass pipe for supplying the active material mixture to the centrifugal concentrator, the circulation path, and the above. A first switching valve that connects the first bypass pipe and switches between a closed state in which the first bypass pipe and the circulation path do not communicate with each other and an open state in which the first bypass pipe and the circulation path communicate with each other. A closed state in which the second bypass pipe in which the solvent flows separated by the centrifugal concentrator, the circulation path and the second bypass pipe are connected, and the second bypass pipe and the circulation path are not communicated with each other, and the above. When a second switching valve for switching between the second bypass pipe and the open state in which the circulation path communicates is provided, the solvent is poured into the container, and the inside of the kneader and the circulation path is cleaned, the said. The first switching valve and the second switching valve are opened.

According to this, the active material mixture remaining inside the kneader and the circulation path is used for the first switching valve and the first bypass pipe by the solvent charged into the container when cleaning the inside of the kneader and the circulation path. It is supplied to the centrifugal concentrator via. The solvent is separated from the active material mixture by the centrifugal concentrator, and the separated solvent is returned to the circulation path via the second bypass pipe and the second switching valve. Therefore, the solvent separated from the active material mixture remaining inside the kneader and the circulation path can be returned to the circulation path and reused for cleaning the inside of the kneader and the circulation path. Therefore, it is not necessary to add the solvent a plurality of times to clean the inside of the kneader and the circulation path, and the cost of the active material mixture can be suppressed.

The kneading system includes a pressure sensor for detecting the pressure in the circulation path and a control device for inputting a signal output from the pressure sensor, and the control device is detected by the pressure sensor. It is preferable to determine whether or not the pressure in the circulation path has reached a specified value.

For example, when the active material mixture is clogged in the circulation path, it is necessary to disassemble and clean the kneader, the circulation path, the pump, the first bypass pipe, the second bypass pipe, the centrifugal concentrator, and the like. Therefore, it is preferable that the operator cleans the clogged part of the circulation path before the circulation path is clogged, or suspends the kneading of raw materials by the kneader to take measures before the circulation path is clogged. ..

In that respect, according to this, the control device determines whether or not the pressure detected from the pressure sensor has reached a specified value. For example, if the specified value is set to a pressure smaller than the pressure when the circulation path is clogged, the control device provides, for example, an external determination result for determining that the pressure has reached the specified value. By transmitting to the notified means, the operator can be made to recognize that the circulation path is about to be clogged. Therefore, it is possible to connect the determination result of whether or not the pressure detected by the pressure sensor has reached the specified value to the response before the circulation path is clogged.

In the above kneading system, it is preferable to further include a micro-nano bubble generator for mixing micro-nano bubbles into at least a part of the solvent charged into the container when cleaning the inside of the kneader and the circulation path. ..

According to this, the raw material and the active material mixture adhering to the kneader and the circulation path are easily peeled off by the cavitation effect of the micro-nano bubbles mixed in the solvent put into the container. Therefore, the cleaning effect inside the kneader and the circulation path can be improved.

According to the present invention, the cost of the active material mixture can be suppressed.

The schematic diagram of the 1st Embodiment of a kneading system. The schematic diagram of the 2nd Embodiment of a kneading system. The schematic which shows the micro-nano bubble generator of the 3rd Embodiment of a kneading system.

<First Embodiment>
Hereinafter, the first embodiment in which the kneading system is embodied will be described with reference to FIG. The kneading system of the present embodiment is, for example, a kneading system for producing an active material mixture used for an electrode of a lithium ion secondary battery.

As shown in FIG. 1, the kneading system 1 includes a kneading machine 10, a circulation path 20, a pump 30, a disperser 40, a first three-way valve 501 as a first switching valve, and a second switching valve. It includes a second three-way valve 502, a first bypass pipe 61, a second bypass pipe 62, and a centrifugal concentrator 70. Further, the kneading system 1 includes a solenoid valve 90 and an active material mixture storage tank 100.

The kneader 10 includes a container 11 into which the raw material R containing the powdered active material S1, the binder S2, and the solvent S3 is charged, and a stirrer 12 for stirring the raw material R inside the container 11. The container 11 has a disk-shaped bottom wall 11a and a cylindrical peripheral wall 11b extending from the edge of the bottom wall 11a. The container 11 has an opening 11c formed by an end portion of the peripheral wall 11b opposite to the bottom wall 11a. The agitator 12 is rotated inside the container 11 by a motor (not shown) to agitate the raw material R charged into the container 11. The kneader 10 produces a slurry-like active material mixture Em by kneading the raw material R charged into the container 11 with the stirrer 12. Stirring the raw material R inside the container 11 is called rough mixing. Further, as the solvent S3, for example, N-methyl-2-pyrrolidone (NMP) is adopted.

The circulation path 20 is composed of a first pipe 21, a second pipe 22, a third pipe 23, a fourth pipe 24, and a fifth pipe 25. One end of the first pipe 21 is connected to the bottom wall 11a of the container 11, and the other end of the first pipe 21 is connected to the suction port of the pump 30. One end of the second pipe 22 is connected to the discharge port of the pump 30, and the other end of the second pipe 22 is connected to the suction port of the disperser 40. The third pipe 23 is a pipe that branches in three directions. The first branch pipe 23a of the third pipe 23 is connected to the discharge port of the disperser 40. The second branch pipe 23b of the third pipe 23 is connected to the active material mixture storage tank 100 via the solenoid valve 90. The solenoid valve 90 switches between a closed state in which the second branch pipe 23b and the active material mixture storage tank 100 do not communicate with each other and an open state in which the second branch pipe 23b and the active material mixture storage tank 100 communicate with each other. The solenoid valve 90 is basically switched to the closed state when the active material mixture Em is being produced in the kneader 10.

The third branch pipe 23c of the third pipe 23 is connected to the first three-way valve 501. Here, the first three-way valve 501 and the second three-way valve 502 are electromagnetic switching valves that have three ports and allow two of the three ports to communicate with each other. Assuming that the three ports of the first three-way valve 501 and the second three-way valve 502 are the first port 51, the second port 52, and the third port 53, the first three-way valve 501 has the first port 51 and the second port. The first state in which the 52 communicates with each other and the second state in which the first port 51 and the third port 53 communicate with each other are switched. The second three-way valve 502 is switched between a second state in which the first port 51 and the third port 53 communicate with each other and a third state in which the second port 52 and the third port 53 communicate with each other. The first three-way valve 501 is switched to the first state when the active material mixture Em is being produced in the kneader 10. The second three-way valve 502 is switched to the second state when the active material mixture Em is being produced in the kneader 10. The third branch pipe 23c of the third pipe 23 is connected to the first port 51 of the first three-way valve 501.

One end of the fourth pipe 24 is connected to the second port 52 of the first three-way valve 501, and the other end of the fourth pipe 24 is connected to the first port 51 of the second three-way valve 502. There is. One end of the fifth pipe 25 is connected to the third port 53 of the second three-way valve 502, and the other end of the fifth pipe 25 is connected to the peripheral wall 11b of the container 11.

One end of the first bypass pipe 61 is connected to the third port 53 of the first three-way valve 501, and the other end of the first bypass pipe 61 is connected to the centrifugal concentrator 70. That is, the first three-way valve 501 connects the first bypass pipe 61 and the circulation path 20. The first bypass pipe 61 supplies the active material mixture Em to the centrifugal concentrator 70. The centrifugal concentrator 70 has a function of separating solid and liquid by centrifugal force. In the present embodiment, the centrifugal concentrator 70 has a function of separating the liquid solvent S3 from the active material mixture Em supplied to the centrifugal concentrator 70 via the first bypass pipe 61. Therefore, the centrifugal concentrator 70 has a suction port for sucking the active material mixture Em, a solvent discharge port for discharging the solvent S3 separated from the active material mixture Em, and a solvent S3 from the active material mixture Em. It has a residue outlet from which the separated residual residue is discharged. The other end of the first bypass pipe 61 is connected to the suction port of the centrifugal concentrator 70. One end of the second bypass pipe 62 is connected to the solvent outlet of the centrifugal concentrator 70, and the other end of the second bypass pipe 62 is connected to the second port 52 of the second three-way valve 502. There is. That is, the second three-way valve 502 connects the second bypass pipe 62 and the circulation path 20. The solvent S3 separated by the centrifugal concentrator 70 flows through the second bypass pipe 62. The residue discharged from the residue discharge port of the centrifugal concentrator 70 is stored in the residue storage tank 110.

The kneading system 1 includes a control device 80 and a pressure sensor 85 provided in the circulation path 20. The pressure sensor 85 is provided in the fourth pipe 24 of the circulation path 20. The pressure sensor 85 detects the pressure Pr in the fourth pipe 24. The signal detected by the pressure sensor 85 is output to the control device 80.

The control device 80 controls a motor (not shown), a pump 30, a disperser 40, a first three-way valve 501, a second three-way valve 502, a centrifugal concentrator 70, and a solenoid valve 90 that rotate the stirrer 12 of the kneader 10. .. When the solvent S3 is charged into the container 11 and the inside of the kneader 10 and the circulation path 20 is cleaned, the control device 80 switches the first three-way valve 501 from the first state to the second state, and sets the second three-way valve 502. Switch from the second state to the third state. The control device 80 has a memory in which a program for controlling each configuration is stored, and a CPU for executing the program.

A signal output from the pressure sensor 85 is input to the control device 80. In the memory of the control device 80, a program for determining whether or not the pressure Pr detected by the pressure sensor 85 has reached a specified value is stored. Here, the specified value is when the fourth pipe 24 is clogged with the active material mixture Em remaining in the fourth pipe 24, the powdery active material S1 fixed in the fourth pipe 24, or the like. The pressure is set to be smaller than the pressure in the fourth pipe 24 of. That is, the specified value indicates the pressure indicating the state before the fourth pipe 24 is clogged. Therefore, when the control device 80 determines that the pressure Pr has reached the specified value, it indicates that the active material mixture Em is difficult to flow in the fourth pipe 24. In this embodiment, a notification means such as a speaker (not shown) is provided, and the control device 80 operates the notification means based on the determination result that the pressure Pr has reached the specified value, and the operator operates the notification means. Is urged to clean the fourth pipe 24. Further, the control device 80 is not limited to operating the notification means when the pressure Pr reaches a specified value, for example, the motor and the pump 30 are stopped, and the kneading machine 10 temporarily kneads the raw material R. You may stop it.

The operation of this embodiment will be described.
In the kneading system 1, the raw material R is agitated by the agitator 12 inside the container 11, and the agitated raw material R is used by the power of the pump 30 in the first pipe 21, the second pipe 22, the disperser 40, and the third pipe 23. The active material mixture Em is produced by circulating the first three-way valve 501 in the first state, the fourth pipe 24, the second three-way valve 502 in the second state, the fifth pipe 25, and the container 11 in this order. Here, the circulation path 20 is connected to the container 11 and serves as a path for circulating the active material mixture Em in the container 11. Further, the pump 30 is connected to the circulation path 20 and circulates the active material mixture Em in the container 11 through the circulation path 20. After the active material mixture Em is sufficiently circulated in the container 11 through the circulation path 20, the active material mixture Em inside the container 11 is powered by the pump 30 to be the first pipe 21, the second pipe 22, and the third pipe. It is sent to and stored in the active material mixture storage tank 100 through the second branch pipe 23b of 23 and the solenoid valve 90 in the open state. Here, the first three-way valve 501 is maintained in the first state and the second three-way valve 502 is maintained in the second state until the active material mixture Em is stored in the active material mixture storage tank 100. Will be done. That is, one end of the first bypass pipe 61 and the third branch pipe 23c of the third pipe 23 do not communicate with each other, and the other end of the second bypass pipe 62 and the fourth pipe 24 do not communicate with each other. Is maintained in. Therefore, the first three-way valve 501 is in a closed state in which the first bypass pipe 61 and the circulation path 20 do not communicate with each other, and the second three-way valve 502 is in a closed state in which the second bypass pipe 62 and the circulation path 20 do not communicate with each other. To do. When the active material mixture Em is being produced, the disperser 40 carries out precise mixing in which the raw material R roughly mixed inside the container 11 is further finely mixed. For the disperser 40, for example, a rotary kiln is adopted.

Further, in the kneading system 1, after the active material mixture Em is stored in the active material mixture storage tank 100, the solvent S3 is put into the container 11 to clean the inside of the kneader 10 and the circulation path 20, and the pump is used. The solvent S3 is circulated in the circulation path 20 by 30. At this time, the control device 80 drives the centrifugal concentrator 70. Further, the control device 80 switches the first three-way valve 501 from the first state to the second state, and switches the second three-way valve 502 from the second state to the third state. That is, one end of the first bypass pipe 61 communicates with the third branch pipe 23c of the third pipe 23, and the other end of the second bypass pipe 62 communicates with the fifth pipe 25. Be maintained. Therefore, the first three-way valve 501 is in an open state in which the first bypass pipe 61 and the circulation path 20 communicate with each other, and the second three-way valve 502 is in an open state in which the second bypass pipe 62 and the circulation path 20 communicate with each other. To do. As a result, the solvent S3 charged into the container 11 is powered by the pump 30, the first pipe 21, the second pipe 22, the disperser 40, the third pipe 23, the first three-way valve 501 in the second state, and the first bypass. It circulates in the order of the pipe 61, the centrifugal concentrator 70, the second bypass pipe 62, the second three-way valve 502 in the third state, and the container 11. Therefore, the active material mixture Em remaining in the kneader 10, the first pipe 21, the second pipe 22, the disperser 40, the third pipe 23, and the fifth pipe 25 is washed away by the solvent S3. Then, the active material mixture Em remaining inside the kneader 10 and the circulation path 20 flows through the first three-way valve 501 and the first bypass pipe 61, and the remaining active material mixture Em flows into the centrifugal concentrator 70. Be supplied.

The centrifugal concentrator 70 separates the solvent S3 contained in the remaining active material mixture Em and discharges it to the second bypass pipe 62. That is, the solvent S3 separated by the centrifugal concentrator 70 is returned to the container 11 via the fifth pipe 25, and again the first pipe 21, the second pipe 22, the disperser 40, the third pipe 23, and the second state. The first three-way valve 501, the first bypass pipe 61, the centrifugal concentrator 70, the second bypass pipe 62, the second three-way valve 502 in the third state, and the container 11 circulate in this order. In cleaning the inside of the kneader 10 and the circulation path 20, the active material mixture storage tank 100 may be removed from the second branch pipe 23b of the third pipe 23. Further, the active material mixture Em stored inside the active material mixture storage tank 100 is transferred to, for example, a coating device for coating the electrode with the active material mixture Em, and the active material mixture storage tank 100 is used. The 100 may be connected to the second branch pipe 23b of the third pipe 23. Further, at this time, the solenoid valve 90 may be in the open state or the closed state, but it is in the open state in consideration of cleaning the second branch pipe 23b of the third pipe 23. Is preferable.

The effect of this embodiment will be described.
(1-1) The active material mixture Em remaining inside the kneader 10 and the circulation path 20 is first-three-way by the solvent S3 charged into the container 11 when cleaning the insides of the kneader 10 and the circulation path 20. It is supplied to the centrifugal concentrator 70 via the valve 501 and the first bypass pipe 61. The solvent S3 is separated from the active material mixture Em by the centrifugal concentrator 70, and the separated solvent S3 is returned to the circulation path 20 via the second bypass pipe 62 and the second three-way valve 502. Therefore, the solvent S3 separated from the active material mixture Em remaining inside the kneader 10 and the circulation path 20 can be returned to the circulation path 20 and reused for cleaning the inside of the kneader 10 and the circulation path 20. Therefore, it is not necessary to add the solvent S3 a plurality of times to clean the inside of the kneader 10 and the circulation path 20, and the cost of the active material mixture Em can be suppressed.

(1-2) For example, when the active material mixture Em is clogged in the circulation path 20, the kneader 10, the circulation path 20, the pump 30, the first bypass pipe 61, the second bypass pipe 62, the centrifugal concentrator 70, and the like are used. All need to be separated and washed. Therefore, before the circulation path 20 is clogged, the operator cleans the clogged portion of the circulation path 20 or suspends the kneading of the raw material R by the kneading machine 10 to take measures before the circulation path 20 is clogged. It is preferable to carry out. In particular, in the present embodiment, since the solvent S3 does not flow into the fourth pipe 24 when the kneader 10 and the circulation path 20 are washed, it is necessary to pay attention to the clogging of the fourth pipe 24.

In the present embodiment, the control device 80 determines whether or not the pressure Pr detected from the pressure sensor 85 has reached a specified value. The control device 80 transmits the determination result of determining that the pressure Pr has reached the specified value to, for example, an externally provided notification means to make the operator recognize that the fourth pipe 24 is about to be clogged. be able to. Therefore, the determination result of whether or not the pressure detected by the pressure sensor has reached the specified value can be linked to the response before the circulation path 20 is clogged.

<Second embodiment>
Hereinafter, a second embodiment in which the kneading system is embodied will be described with reference to FIG. The present embodiment has basically the same configuration as the first embodiment. The main difference from the first embodiment of this embodiment is that the configurations of the piping and the switching valve are different. Hereinafter, the differences from the first embodiment will be described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 2, the circulation path 20 includes a first pipe 21, a second pipe 22, and a third pipe 23. The third pipe 23 is composed of a first branch pipe 23a, a second branch pipe 23b, and a third branch pipe 23d. One end of the third branch pipe 23d is integrally provided with the first branch pipe 23a and the second branch pipe 23b at the intersection of the first branch pipe 23a and the second branch pipe 23b, and the third branch pipe 23d is provided. The other end of 23d is connected to the peripheral wall 11b of the container 11 of the kneader 10. The third branch pipe 23d has a first subdivision pipe 23e and a second subdivision pipe 23f.

The kneading system 1 includes a first solenoid valve 541 as a first switching valve and a second solenoid valve 542 as a second switching valve. The first subdivision pipe 23e of the third branch pipe 23d is connected to the first solenoid valve 541. The second subdivision pipe 23f of the third branch pipe 23d is connected to the second solenoid valve 542. Here, the first solenoid valve 541 and the second solenoid valve 542 are solenoid switching valves having two ports and shutting off or communicating the two ports. The first solenoid valve 541 and the second solenoid valve 542 switch between a fourth state in which the two ports are shut off and a fifth state in which the two ports are communicated with each other. The first solenoid valve 541 and the second solenoid valve 542 are switched to the fourth state when the active material mixture Em is being manufactured. The first solenoid valve 541 and the second solenoid valve 542 are switched from the fourth state to the fifth state by the control device 80 when cleaning the inside of the kneader 10 and the circulation path 20. The first subdivision pipe 23e of the third branch pipe 23d is connected to the first port 54a of the first solenoid valve 541. The second subdivision pipe 23f of the third branch pipe 23d is connected to the first port 54a of the second solenoid valve 542. Further, one end of the first bypass pipe 61 is connected to the second port 54b of the first solenoid valve 541, and the other end of the first bypass pipe 61 is connected to the suction port of the centrifugal concentrator 70. ing. One end of the second bypass pipe 62 is connected to the solvent discharge port of the centrifugal concentrator 70, and the other end of the second bypass pipe 62 is connected to the second port 54b of the second solenoid valve 542. There is.

The pressure sensor 85 is provided between the first subdivision pipe 23e and the second subdivision pipe 23f of the third branch pipe 23d. The pressure sensor 85 detects the pressure Pr between the first subdivision pipe 23e and the second subdivision pipe 23f of the third branch pipe 23d, and the signal output from the pressure sensor 85 is input to the control device 80. .. The control device 80 performs the same control as in the first embodiment based on the pressure Pr.

In this embodiment, the same actions and effects as those in the first embodiment can be obtained.
Each of the above embodiments can be modified and implemented as follows. Each of the above embodiments and the following modified examples can be implemented in combination with each other within a technically consistent range.

○ The following configurations may be added to each of the above embodiments.
As shown in FIG. 3, the kneading system 1 is a micro-nano bubble generator 120 for mixing micro-nano bubbles into at least a part of the solvent S3 charged into the container 11 when cleaning the inside of the kneading machine 10 and the circulation path 20. It has.

By adding the micro-nano bubble generator 120, the raw material R and the active material mixture Em adhering to the kneader 10 and the circulation path 20 are easily peeled off due to the cavitation effect of the micro-nano bubbles mixed in the solvent S3 charged into the container 11. Become. Therefore, the same effect as that of the first embodiment can be obtained, and the cleaning effect of the kneader 10 and the circulation path 20 can be improved.

○ The kneading system 1 preferably includes an ultrasonic wave generator that generates ultrasonic waves in addition to the micro-nano bubble generator 120. For example, when the solvent S3 mixed with micro-nano bubbles is passed through a curved portion of the circulation path 20 in which the active material mixture Em and the active material S1 of the raw material R are likely to accumulate, and ultrasonic waves are generated by an ultrasonic wave generator, circulation occurs. The raw material R and the active material mixture Em adhering to the bent portion of the path 20 are more easily peeled off, and the cleaning effect is further improved.

○ The pressure sensor 85 may be provided in any of the pipes 21, 22, 23, 25 except the fourth pipe 24, or may be provided in each of the pipes 21, 22, 23, 24, 25. Good. The pressure sensor 85 is preferably provided in a portion of the circulation path 20 where the raw material R and the active material mixture Em are likely to remain.

○ In the kneading system 1, the pressure sensor 85 may be omitted.
○ In the first embodiment, the first three-way valve 501, the second three-way valve 502, the first bypass pipe 61, the second bypass pipe 62, and the centrifugal concentrator 70 are moved upstream of the circulation path 20 with reference to the pump 30. It may be arranged. That is, the first bypass pipe 61 may be connected to the first pipe 21 via the first three-way valve 501, and the second bypass pipe 62 may be connected to the first pipe 21 via the second three-way valve 502. Further, one end of the first bypass pipe 61 is connected to the first pipe 21 via the first three-way valve 501, and the other end of the second bypass pipe 62 is connected to the first pipe 21 via the second three-way valve 502. It may be changed to connect to the pipe 22. In this case, the centrifugal concentrator 70 employs, for example, a generally known centrifugal concentrator pump, and when cleaning the inside of the kneader 10 and the circulation path 20, the operation of the pump 30 is stopped and the centrifugal concentrator 70 is used. It is preferable to draw in the remaining active material mixture Em by the power of 70. The second embodiment may be changed in the same manner.

○ The kneading system 1 includes a kneading machine 10, a circulation path 20, a pump 30, a first three-way valve 501, a second three-way valve 502, a first bypass pipe 61, a second bypass pipe 62, and centrifugal concentration. The configuration of the disperser 40, the solenoid valve 90, and the active material mixture storage tank 100 may be omitted.

1 ... kneading system, 10 ... kneading machine, 11 ... container, 20 ... circulation path, 21 ... first pipe, 22 ... second pipe, 23 ... third pipe, 24 ... fourth pipe, 25 ... fifth pipe, 30 ... Pump, 61 ... 1st bypass pipe, 62 ... 2nd bypass pipe, 70 ... Centrifugal concentrator, 80 ... Control device, 85 ... Pressure sensor, 120 ... Micro-nano bubble generator, 501 ... 1st three-way valve, 502 ... No. 2 Three-way valve, 541 ... 1st solenoid valve, 542 ... 2nd solenoid valve, Pr ... Pressure, R ... Raw material, S1 ... Active material, S2 ... Binder, S3 ... Solenoid, Em ... Active material mixture.

Claims (3)

A kneader having a container into which raw materials containing an active material, a binder, and a solvent are charged, and kneading the raw materials in the container to produce a slurry-like active material mixture.
A circulation path connected to the container and circulating the active material mixture to the container,
A kneading system including a pump connected to the circulation path and circulating the active material mixture to the container through the circulation path.
A centrifugal concentrator that separates the solvent from the active material mixture,
A first bypass pipe for supplying the active material mixture to the centrifugal concentrator, and
A second that connects the circulation path and the first bypass pipe and switches between a closed state in which the first bypass pipe and the circulation path do not communicate with each other and an open state in which the first bypass pipe and the circulation path communicate with each other. 1 switching valve and
A second bypass pipe through which the solvent separated by the centrifugal concentrator flows, and
A second that connects the circulation path and the second bypass pipe and switches between a closed state in which the second bypass pipe and the circulation path do not communicate with each other and an open state in which the second bypass pipe and the circulation path communicate with each other. Equipped with 2 switching valves
A kneading system characterized in that the first switching valve and the second switching valve are opened when the solvent is put into the container and the inside of the kneading machine and the circulation path is washed. A pressure sensor that detects the pressure in the circulation path and
A control device for inputting a signal output from the pressure sensor is provided.
The kneading system according to claim 1, wherein the control device determines whether or not the pressure in the circulation path detected by the pressure sensor has reached a specified value. The first or second aspect of the present invention, further comprising a micro-nano bubble generator for mixing micro-nano bubbles into at least a part of the solvent charged into the container when cleaning the inside of the kneader and the circulation path. Kneading system.

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