A pulp recovery device and recovery method for papermaking wastewater

Abstract

The present invention discloses a pulp recovery device in papermaking wastewater, which belongs to the field of papermaking technology, and comprises a barrel body and a barrel cover arranged at the upper end of the barrel body, wherein the upper end of the barrel cover is provided with a feed hopper, and the bottom surface of the barrel body is divided into a water filter chamber and a material receiving chamber by a partition, and a rotating shaft is provided through the middle of the top surface of the barrel cover, and filter cartridges matched with the lower end of the feed hopper are fixedly provided at both ends of the connecting plate, and a pressing assembly matched with the filter cartridge is provided at the lower end of the barrel cover. The beneficial effects of the present invention are as follows: by arranging the filter cartridge, the lower filter plate, the rotating shaft, the lever, the block, the pressing assembly and the transmission member, when the pressing assembly moves downward, the pulp in one of the filter cartridges is pressed and dehydrated, which is convenient for the staff to recover, and when the pressing assembly moves upward, the filter plate is initially lifted to the outside of the filter cartridge, and the rotating shaft is rotated by continuing to move upward through the transmission member, so as to achieve the effect of switching the positions of the two filter cartridges, and prepare for the next pressing.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking, and in particular to a pulp recovery device and a recovery method thereof in papermaking wastewater. Background Art

[0002] In the process of papermaking, a large amount of wastewater will be generated from the pulping process and the papermaking process. Since some pulp fibers will remain in the wastewater, if the wastewater is directly treated, it will cause a waste of pulp raw materials and increase production costs. Therefore, a recovery device is needed to recover the pulp in the papermaking wastewater.

[0003] Most slurry recovery devices filter sewage by setting up a filter bucket, and then use a pressure plate to filter and dehydrate the slurry in the filter bucket. However, during operation, when filtering sewage in the filter bucket, filter pressing and dehydration cannot be performed. When filter pressing and dehydration are performed, the discharge and filtration of sewage must be stopped, which reduces work efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems and to propose a pulp recovery device in papermaking wastewater.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The filter press of the embodiment of claim 1, wherein the filter press is located adjacent to the filter press and the filter press is located adjacent to the filter press, wherein the filter press is located adjacent to the filter press and the filter press is located adjacent to the filter press.

[0007] As a further description of the above technical solution:

[0008] The pressing assembly includes a pressure rod movably penetrating the barrel cover and an electric push rod fixedly arranged at the upper end of the barrel cover, the upper end of the electric push rod is provided with a top plate for squeezing the pressure rod, the lower end of the pressure rod is provided with a filter plate matched with the filter cartridge, a fixed block is fixedly provided on the outer side of the pressure rod, and the fixed block is connected to the upper end surface of the barrel cover through a spring, the upper end of the barrel cover is provided with a transmission member for driving the rotating shaft to rotate intermittently, the feed hopper is funnel-shaped, and a blocking member for blocking the output end of the feed hopper is provided on one side of the lower end of the top plate.

[0009] As a further description of the above technical solution:

[0010] The transmission member includes a fixed shell fixed to the upper end of the barrel cover and a ratchet tooth plate fixed to the lower end of the top plate, the inner wall of the fixed shell is rotatably provided with a transmission gear that matches the ratchet tooth plate, the upper end of the rotating shaft is provided with a toothed disk that matches the transmission gear, and the rotating connection between the rotating shaft and the barrel cover is provided with a ratchet wheel that limits the one-way rotation of the rotating shaft.

[0011] As a further description of the above technical solution:

[0012] The blocking member comprises a mounting rod arranged at the lower end of the top plate and a piston arranged at the lower end of the mounting rod, and the piston is in close contact with the inner wall of the output end of the feed hopper.

[0013] As a further description of the above technical solution:

[0014] An end cover is arranged at the upper end of the feed hopper, a feed pipe is penetrated through the top surface of the end cover, and a through hole for sliding of the mounting rod is opened in the end cover.

[0015] As a further description of the above technical solution:

[0016] A turntable is provided on the rotating sleeve at the lower end of the outer side of the rotating shaft, a second torsion spring is provided at the rotating connection of the turntable, two knocking rods are symmetrically provided on the outer surface of the turntable for knocking the outer surface of the filter cartridge respectively, incomplete gears are provided on the upper ends of the two rotating shafts, and two ratchet tooth blocks are symmetrically provided on the outer surface of the turntable for respectively matching with the incomplete gears.

[0017] As a further description of the above technical solution:

[0018] The toothed disc, transmission gear, spring, fixed block and electric push rod are all located inside the fixed shell, and a through opening for the sliding of the ratchet tooth plate and the pressure rod is opened on the top surface of the fixed shell.

[0019] As a further description of the above technical solution:

[0020] A sealing door matched with the discharge port is hingedly provided on the outer side of the barrel body.

[0021] The present invention also proposes a method for recovering pulp from papermaking wastewater, comprising the following steps:

[0022] Step 1: connect the feed pipe to the discharge end of papermaking wastewater, and feed the papermaking wastewater into the feed hopper from the feed pipe;

[0023] Step 2: Start the electric push rod to drive the top plate to move upward. The upward movement of the top plate releases the squeezing of the pressure rod, so that the pressure rod moves upward under the action of the spring, so that the filter press plate moves upward to the outside of the filter cartridge. At the same time, the upward movement of the top plate drives the piston upward through the mounting rod. During this process, the upward movement of the top plate drives the ratchet tooth plate to move upward. During the process of the ratchet tooth plate and the transmission gear not meshing, then the top plate continues to move upward, so that the ratchet tooth plate and the transmission gear mesh and transmit, so that the toothed disc rotates, and the rotation of the toothed disc drives the rotating shaft to rotate, so that the rotating shaft rotates 180°, that is, the two filter cartridges swap positions. During this process, the piston always slides inside the output end of the feed hopper, and the output end of the feed hopper is in a sealed state. Then the top plate continues to move upward, at this time driving the piston to continue to move upward, so that the output end of the feed hopper is in an open state, and the sewage falls into one of the filter cartridges for filtration;

[0024] Step 3: The rotating shaft drives the two filter cartridges to revolve during the rotation process. During the rotation of one of the filter cartridges, the lever contacts the block. At this time, the filter cartridge continues to revolve, causing the lower filter plate to deflect and open, so that the slurry in the filter cartridge falls into the material receiving chamber. As the filter cartridge continues to revolve, the lever disengages from the block, and then under the action of the first torsion spring, the lower filter plate rotates and resets;

[0025] Step 4, then start the electric push rod to drive the top plate to move downward. The downward movement of the top plate causes the piston to move downward to block the output end of the feed hopper. The top plate moves downward and drives the ratchet tooth plate to move downward. During the process, it will not drive the rotating shaft to rotate in the opposite direction. The top plate continues to move downward to squeeze the pressure rod to move downward, thereby causing the filter press plate to move downward to filter and dehydrate the slurry in the other filter cartridge.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] In the present invention, by arranging the filter cartridge, the lower filter plate, the rotating shaft, the lever, the block, the lower pressure assembly and the transmission member, when the lower pressure assembly moves downward, the pulp in one of the filter cartridges is pressed and dehydrated, which is convenient for the staff to recover; when the lower pressure assembly moves upward, the filter press plate is initially lifted to the outside of the filter cartridge, and the rotating shaft is rotated by the transmission member by continuing to move upward, so as to achieve the effect of switching the positions of the two filter cartridges, and prepare for the next filter pressing;

[0028] In the present invention, by providing an incomplete gear, a rotating disk, a knocking rod and a ratchet tooth block, during the process of switching the positions of the two filter cartridges, the contact between the lever and the block is blocked, thereby causing the lower filter plate to rotate relative to the filter cartridge, so that the lower end of the filter cartridge is gradually opened, and at the same time, the rotation of the lower filter plate causes the incomplete gear to rotate, and under the cooperation of the incomplete gear and the ratchet tooth block, the rotating disk reciprocates, thereby causing the knocking rod to knock on the surface of the filter cartridge, one of the knocking rods knocks on one of the filter cartridges so that the slurry that has been filtered quickly falls into the material receiving chamber, and the other knocking rod knocks on the other filter cartridge so that the slurry is vibrated to control water;

[0029] In the present invention, a plugging piece is provided to seal the output end of the feed hopper so that during the position switching process of the two filter cartridges, the sewage in the feed hopper will not be discharged but stored in the feed hopper. During operation, there is no need to stop the discharge of sewage, which further improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The appearance diagram of the recovery device provided according to the embodiment of the present invention is shown;

[0031] Figure 2 It shows an exploded schematic diagram of the recovery device structure provided according to an embodiment of the present invention;

[0032] Figure 3 A partial structural schematic diagram of a recovery device provided according to an embodiment of the present invention is shown;

[0033] Figure 4 A schematic diagram showing the position relationship between the shift lever and the stopper provided in an embodiment of the present invention is shown;

[0034] Figure 5 A schematic diagram of the structure of a rotating disk, an incomplete gear and a knocking rod provided in an embodiment of the present invention is shown;

[0035] Figure 6 A schematic diagram of the structure of a transmission member and a blocking member provided in an embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram of the internal structure of a barrel provided according to an embodiment of the present invention is shown;

[0037] Figure 8 A schematic diagram of the structure of a ratchet tooth plate provided according to an embodiment of the present invention is shown.

[0038] Legend: 1. Barrel body; 2. Barrel cover; 3. Feed hopper; 4. Fixed shell; 5. Drain pipe; 6. End cover; 7. Feed pipe; 8. Top plate; 9. Filter cartridge; 10. Rotating shaft; 11. Toothed disc; 12. Transmission gear; 13. Ratchet toothed plate; 14. Electric push rod; 15. Mounting rod; 16. Piston; 17. Pressure rod; 18. Filter plate; 19. Spring; 20. Fixed block; 21. Partition; 22. Stop block; 23. Discharge port; 24. Connecting plate; 25. Lower filter plate; 26. Connecting block; 27. Push rod; 28. First torsion spring; 29. ​​Second torsion spring; 30. Turntable; 31. Rotating shaft; 32. Incomplete gear; 33. Knocking rod; 34. Ratchet toothed block. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1-8 As shown, a pulp recovery device in papermaking wastewater comprises a barrel body 1 and a barrel cover 2 arranged at the upper end of the barrel body 1, a feed hopper 3 is arranged at the upper end of the barrel cover 2, the inner bottom surface of the barrel body 1 is divided into a water filter chamber and a material receiving chamber by a partition 21, a drainage pipe 5 connected to the water filter chamber is arranged on one side of the barrel body 1, a discharge port 23 connected to the material receiving chamber is arranged on one side of the barrel body 1, a rotating shaft 10 is rotatably penetrated in the middle of the top surface of the barrel cover 2, a connecting plate 24 is arranged at the lower end of the rotating shaft 10, and two ends of the connecting plate 24 are fixedly provided with There is a filter cartridge 9 matched with the lower end of the feed hopper 3, and rotating shafts 31 are rotatably provided at both ends of the connecting plate 24. A first torsion spring 28 is provided at the rotating connection of the two rotating shafts 31, and connecting blocks 26 are provided at the lower ends of the two rotating shafts 31. One side of the two connecting blocks 26 is respectively provided with a lower filter plate 25 matched with the filter cartridge 9, and a lever 27 is fixedly provided at the lower end of the two lower filter plates 25. A stopper 22 matched with the lever 27 is fixedly provided on the inner wall of the barrel body 1, and a pressing assembly matched with the filter cartridge 9 is provided at the lower end of the barrel cover 2.

[0041] Furthermore, the pressing assembly includes a pressure rod 17 movably penetrating the barrel cover 2 and an electric push rod 14 fixedly arranged at the upper end of the barrel cover 2, the upper end of the electric push rod 14 is provided with a top plate 8 for squeezing the pressure rod 17, the lower end of the pressure rod 17 is provided with a filter plate 18 cooperating with the filter cartridge 9, a fixed block 20 is fixedly arranged on the outer side of the pressure rod 17, the fixed block 20 is connected to the upper end surface of the barrel cover 2 through a spring 19, the upper end of the barrel cover 2 is provided with a transmission member for driving the rotating shaft 10 to rotate intermittently, the feed hopper 3 is funnel-shaped, and a blocking member for blocking the output end of the feed hopper 3 is provided on one side of the lower end of the top plate 8.

[0042] Furthermore, the transmission member includes a fixed shell 4 fixed to the upper end of the barrel cover 2 and a ratchet tooth plate 13 fixed to the lower end of the top plate 8, the inner wall of the fixed shell 4 is rotatably provided with a transmission gear 12 that cooperates with the ratchet tooth plate 13, the upper end of the rotating shaft 10 is provided with a toothed disk 11 that cooperates with the transmission gear 12, and the rotating connection between the rotating shaft 10 and the barrel cover 2 is provided with a ratchet wheel that limits the unidirectional rotation of the rotating shaft 10.

[0043] Furthermore, the blocking member includes a mounting rod 15 disposed at the lower end of the top plate 8 and a piston 16 disposed at the lower end of the mounting rod 15 , and the piston 16 is in close contact with the inner wall of the output end of the feed hopper 3 .

[0044] Furthermore, an end cover 6 is provided at the upper end of the feed hopper 3 , a feed pipe 7 is penetrated through the top surface of the end cover 6 , and a through hole for sliding the mounting rod 15 is opened in the end cover 6 , so as to facilitate the connection between the sewage discharge end and the feed pipe 7 .

[0045] Further, a rotating disk 30 is rotatably sleeved at the lower end of the outer side of the rotating shaft 10, a second torsion spring 29 is provided at the rotating connection of the rotating disk 30, two knocking rods 33 are symmetrically provided on the outer surface of the rotating disk 30 for knocking the outer surface of the filter cartridge 9 respectively, incomplete gears 32 are provided at the upper ends of the two rotating shafts 31, and two ratchet tooth blocks 34 are symmetrically provided on the outer surface of the rotating disk 30 respectively matching with the incomplete gears 32, and during the deflection of the lower filter plate 25, the rotating shaft 31 is rotated, and the rotation of the rotating shaft 31 drives the incomplete gears 32 Rotation, with the cooperation of the incomplete gear 32 and the ratchet tooth block 34, makes the turntable 30 reciprocate. The reciprocating rotation of the turntable 30 drives the two knocking rods 33 to knock on the outer surfaces of the two filter cartridges 9 respectively. One of the knocking rods 33 knocks on the outer surface of one of the filter cartridges 9, so that the slurry after pressure filtration and dehydration in the filter cartridge 9 falls into the material receiving chamber quickly under the action of vibration, and the other knocking rod 33 knocks on the outer surface of the other filter cartridge 9, so that the slurry to be pressure filtration and dehydration in the filter cartridge 9 is controlled under the action of vibration.

[0046] Furthermore, the toothed disc 11, transmission gear 12, spring 19, fixed block 20 and electric push rod 14 are all located inside the fixed shell 4. The top surface of the fixed shell 4 is provided with a through opening for the sliding of the ratchet tooth plate 13 and the pressure rod 17, which effectively improves the aesthetics of the device and improves the safety of the device during operation.

[0047] Furthermore, a sealing door that cooperates with the discharge port 23 is hingedly provided on the outer side of the barrel body 1. When the sealing door is closed, the slurry is concentrated in the receiving chamber, thereby preliminarily achieving the effect of temporary storage of the slurry. When cleaning is required, the slurry in the receiving chamber can be cleaned and recovered from the discharge port 23 by opening the sealing door.

[0048] The present invention also proposes a method for recovering pulp from papermaking wastewater, comprising the following steps:

[0049] Step 1: connect the feed pipe 7 to the papermaking wastewater discharge end, and feed the papermaking wastewater into the feed hopper 3 from the feed pipe 7;

[0050] Step 2, start the electric push rod 14 to drive the top plate 8 to move upward, and the top plate 8 moves upward to release the squeezing of the pressure rod 17, so that the pressure rod 17 moves upward under the action of the spring 19, so that the filter press plate 18 moves upward to the outside of the filter cartridge 9, and at the same time, the top plate 8 moves upward through the mounting rod 15 to drive the piston 16 to move upward. In this process, the top plate 8 moves upward to drive the ratchet tooth plate 13 to move upward. During the process, the ratchet tooth plate 13 and the transmission gear 12 are not engaged, and then the top plate 8 continues to move upward, so that the ratchet tooth plate 13 and the transmission gear 12 are engaged and transmitted, so that the toothed disc 11 rotates, and the rotation of the toothed disc 11 drives the rotating shaft 10 to rotate, so that the rotating shaft 10 rotates 180°, that is, the two filter cartridges 9 exchange positions. In this process, the piston 16 always slides inside the output end of the feed hopper 3, and the output end of the feed hopper 3 is in a sealed state. Then the top plate 8 continues to move upward, and at this time, it drives the piston 16 to continue to move upward, so that the output end of the feed hopper 3 is in an open state, and the sewage falls into one of the filter cartridges 9 for filtration;

[0051] Step 3: The rotating shaft 10 drives the two filter cartridges 9 to revolve during the rotation process. During the rotation of one of the filter cartridges 9, the lever 27 contacts the stopper 22. At this time, the filter cartridge 9 continues to revolve, causing the lower filter plate 25 to deflect and open, so that the slurry in the filter cartridge 9 falls into the material receiving chamber. As the filter cartridge 9 continues to revolve, the lever 27 disengages from the stopper 22, and then under the action of the first torsion spring 28, the lower filter plate 25 rotates and resets;

[0052] Step four, then start the electric push rod 14 to drive the top plate 8 to move downward. The downward movement of the top plate 8 causes the piston 16 to move downward to block the output end of the feed hopper 3. The top plate 8 moves downward and drives the ratchet tooth plate 13 to move downward. During this process, it will not drive the rotating shaft 10 to rotate in the opposite direction. The top plate 8 continues to move downward to squeeze the pressure rod 17 to make it move downward, thereby causing the filter press plate 18 to move downward to filter and dehydrate the slurry in the other filter cartridge 9.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pulp recovery device in papermaking wastewater, comprising a barrel (1) and a barrel cover (2) arranged at the upper end of the barrel (1), wherein a feed hopper (3) is arranged at the upper end of the barrel cover (2), characterized in that: The inner bottom surface of the barrel body (1) is divided into a water filter chamber and a material receiving chamber by a partition (21); a drainage pipe (5) connected to the water filter chamber is provided on one side of the barrel body (1); a discharge port (23) connected to the material receiving chamber is provided on one side of the barrel body (1); a rotating shaft (10) is rotatably penetrated through the middle of the top surface of the barrel cover (2); a connecting plate (24) is provided at the lower end of the rotating shaft (10); filter cartridges (9) matched with the lower end of the feed hopper (3) are fixed at both ends of the connecting plate (24); and the connecting plate (24) is rotatably disposed at both ends of the connecting plate (24). A rotating shaft (31) is provided, a first torsion spring (28) is provided at the rotation connection of the two rotating shafts (31), a connecting block (26) is provided at the lower end of the two rotating shafts (31), a lower filter plate (25) matching with the filter cartridge (9) is provided on one side of the two connecting blocks (26), a lever (27) is fixedly provided at the lower end of the two lower filter plates (25), a stopper (22) matching with the lever (27) is fixedly provided on the inner wall of the barrel body (1), and a pressing assembly matching with the filter cartridge (9) is provided at the lower end of the barrel cover (2); The pressing assembly comprises a pressure rod (17) movably penetrating the barrel cover (2) and an electric push rod (14) fixedly arranged at the upper end of the barrel cover (2); the upper end of the electric push rod (14) is provided with a top plate (8) for pressing the pressure rod (17); the lower end of the pressure rod (17) is provided with a filter plate (18) matched with the filter cartridge (9); a fixing block (20) is fixedly arranged on the outer side of the pressure rod (17); the fixing block (20) is connected to the upper end surface of the barrel cover (2) through a spring (19); the upper end of the barrel cover (2) is provided with a transmission member for driving the rotating shaft (10) to rotate intermittently; the feed hopper (3) is funnel-shaped; and a blocking member for blocking the output end of the feed hopper (3) is provided on one side of the lower end of the top plate (8); The transmission member comprises a fixed shell (4) fixed to the upper end of the barrel cover (2) and a ratchet tooth plate (13) fixed to the lower end of the top plate (8); a transmission gear (12) matching with the ratchet tooth plate (13) is rotatably provided on the inner wall of the fixed shell (4); a toothed disc (11) matching with the transmission gear (12) is provided on the upper end of the rotating shaft (10); and a ratchet wheel for limiting the unidirectional rotation of the rotating shaft (10) is provided at the rotation connection between the rotating shaft (10) and the barrel cover (2); A rotating disk (30) is rotatably sleeved at the lower end of the outer side of the rotating shaft (10), a second torsion spring (29) is provided at the rotating connection of the rotating disk (30), two knocking rods (33) are symmetrically provided on the outer surface of the rotating disk (30) for knocking the outer surface of the filter cartridge (9) respectively, incomplete gears (32) are provided at the upper ends of the two rotating shafts (31), and two ratchet tooth blocks (34) are symmetrically provided on the outer surface of the rotating disk (30) for respectively matching with the incomplete gears (32).

2. The pulp recovery device in papermaking wastewater according to claim 1, characterized in that: The blocking member comprises a mounting rod (15) arranged at the lower end of the top plate (8) and a piston (16) arranged at the lower end of the mounting rod (15), and the piston (16) is in close contact with the inner wall of the output end of the feed hopper (3).

3. The pulp recovery device in papermaking wastewater according to claim 2, characterized in that: The upper end of the feed hopper (3) is provided with an end cover (6), the top surface of the end cover (6) is penetrated by a feed pipe (7), and the end cover (6) is provided with a through hole for sliding of a mounting rod (15).

4. The pulp recovery device in papermaking wastewater according to claim 1, characterized in that: The toothed disc (11), the transmission gear (12), the spring (19), the fixed block (20) and the electric push rod (14) are all located inside the fixed shell (4), and the top surface of the fixed shell (4) is provided with a through opening for the sliding of the ratchet tooth plate (13) and the pressure rod (17).

5. The pulp recovery device in papermaking wastewater according to claim 1, characterized in that: The barrel body (1) is hingedly provided with a sealing door on the outside thereof which matches the discharge port (23).

6. A method for recovering pulp from papermaking wastewater according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: connecting the feed pipe (7) to the papermaking wastewater discharge end, and feeding the papermaking wastewater into the feed hopper (3) from the feed pipe (7); Step 2: Start the electric push rod (14) to drive the top plate (8) to move upward. The top plate (8) moves upward to release the compression of the pressure rod (17), so that the pressure rod (17) moves upward under the action of the spring (19), so that the filter plate (18) moves upward to the outside of the filter cartridge (9). At the same time, the top plate (8) moves upward to drive the piston (16) to move upward through the mounting rod (15). In this process, the top plate (8) moves upward to drive the ratchet tooth plate (13) to move upward. During the process, the ratchet tooth plate (13) and the transmission gear (12) are not engaged, and then the top plate (8) continues to move upward, so that The ratchet tooth plate (13) is meshed with the transmission gear (12) to drive the toothed disc (11) to rotate, and the rotation of the toothed disc (11) drives the rotating shaft (10) to rotate, so that the rotating shaft (10) rotates 180 degrees, that is, the two filter cartridges (9) are swapped. During this process, the piston (16) always slides inside the output end of the feed hopper (3), and the output end of the feed hopper (3) is in a sealed state. Then the top plate (8) continues to move upward, and at this time drives the piston (16) to continue to move upward, so that the output end of the feed hopper (3) is in an open state, and the sewage falls into one of the filter cartridges (9) for filtration; Step 3: The rotating shaft (10) drives the two filter cartridges (9) to revolve during the rotation process. During the rotation process of one of the filter cartridges (9), the lever (27) contacts the stopper (22). At this time, the filter cartridge (9) continues to revolve, causing the lower filter plate (25) to deflect and open, so that the slurry in the filter cartridge (9) falls into the material receiving chamber. As the filter cartridge (9) continues to revolve, the lever (27) disengages from the stopper (22), and then under the action of the first torsion spring (28), the lower filter plate (25) rotates and resets. Step 4, then start the electric push rod (14) to drive the top plate (8) to move downward. The downward movement of the top plate (8) causes the piston (16) to move downward, thereby blocking the output end of the feed hopper (3). The top plate (8) moves downward and drives the ratchet tooth plate (13) to move downward, but will not drive the rotating shaft (10) to rotate in the opposite direction. The top plate (8) continues to move downward, squeezing the pressure rod (17) to move downward, thereby causing the filter press plate (18) to move downward to filter and dehydrate the slurry in the other filter cartridge (9).

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