A filter press device

Abstract

The utility model discloses a kind of filter-pressing devices, including filter-pressing mechanism, collection structure, thickening mechanism and reflux structure;Filter-pressing mechanism has filter-pressing cavity and with filter-pressing cavity communication feed pipe, filtrate outlet and filter residue mouth;Collection structure has liquid storage cavity and with liquid storage cavity communication drain outlet and discharge port, the inlet of liquid storage cavity is connected with the filtrate outlet of filter-pressing mechanism;Thickening mechanism includes the thickener for being located in liquid storage cavity and being located between drain outlet and discharge port, and the thickening drive part of connecting thickener, thickener is used to under the drive of thickening drive part, the filtrate collected to liquid storage cavity is thickened and handled;Reflux structure connects the discharge port of thickening mechanism and the feed pipe of filter-pressing mechanism, to send back filter-pressing cavity after thickening and handling material, this device realizes the further thickening and handling of filtrate after filter-pressing and the reflux re-filter-pressing of material, effectively improve the recovery rate and utilization efficiency of resource.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, specifically to a filter press device. Background Technology

[0002] In the preparation of ternary precursors for lithium-ion battery cathode materials, solid-liquid separation and washing are key processes affecting product purity, particle morphology, and production efficiency. A pressure filter, driven by pressure, forces the liquid in the suspension through the filter medium, while the solid is retained to form a filter cake.

[0003] Patent CN217773507U discloses a system for recovering regenerated wastewater from the production of ternary cathode precursors. The device includes a high-efficiency thickener, a sedimentation recovery tank, a clarified liquid tank, a precision filter, a regenerated binary liquid tank, a filter press, and an acid dissolution tank. This system transports the precipitated slurry to the filter press for solid-liquid separation, and the filter cake is transported to the acid dissolution tank for acid dissolution. The filtrate from the filter press is then discharged into a T-membrane wastewater treatment system.

[0004] However, the filtrate produced after filtration by a filter press still contains a large amount of useful substances that can be recovered. These fine particles are not fully retained in the traditional process and are discharged from the system with the filtrate, resulting in serious waste of resources and a reduction in recovery rate. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a pressure filter device to solve the technical problems of low resource recovery rate and insufficient retention of useful substances in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a filter press device, including a filter press mechanism, a collection structure, a thickening mechanism, and a reflux structure. The filter press mechanism has a filter press chamber and a feed pipe, a filtrate outlet, and a filter residue outlet communicating with the filter press chamber. The collection structure has a storage chamber and a discharge port and a discharge outlet communicating with the storage chamber. The inlet of the storage chamber is connected to the filtrate outlet of the filter press mechanism. The thickening mechanism includes a thickening element disposed in the storage chamber and located between the discharge port and the discharge port, and a thickening drive element connected to the thickening element. The thickening element is used to thicken the filtrate collected in the storage chamber under the drive of the thickening drive element. The reflux structure connects the discharge port of the thickening mechanism to the feed pipe of the filter press mechanism to send the thickened material back to the filter press chamber.

[0007] In some embodiments, the filter press mechanism includes a filter press cylinder, an extruder, and an extrusion drive. The filter press cylinder is arranged horizontally, with one end connected to a feed pipe and the other end provided with the filter residue inlet. Filter holes are provided on the circumferential wall of the filter press cylinder. The extruder is disposed inside the filter press cylinder, and the extrusion drive is connected to the extruder and is used to drive the extruder to move inside the filter press cylinder to perform a filter press operation on the material entering the filter chamber.

[0008] In some embodiments, the extruder includes a screw rod arranged axially along the filter press cylinder, with helical blades formed on its outer periphery that fit against the inner wall of the filter press cylinder.

[0009] In some embodiments, the extrusion drive includes a motor and a transmission structure. The motor is connected to the screw rod through the transmission structure and is used to drive the screw rod to rotate around its own axis, thereby pushing the material entering the filter press chamber toward the filter residue inlet.

[0010] In some embodiments, the filter press further includes a liquid collection structure having a liquid collection chamber with a cross-sectional area that gradually decreases from its inlet to its outlet. The inlet of the liquid collection structure is connected to the filtrate outlet of the filter press, and the outlet of the liquid collection structure is connected to the liquid storage chamber of the collection structure.

[0011] In some embodiments, the inlet of the liquid collection structure is offset toward the filter cake port of the filter press mechanism.

[0012] In some embodiments, the filter press further includes a clean water tank, which is connected to the drain port.

[0013] In some embodiments, the thickening component includes a thickening plate, which is laterally disposed inside the liquid storage cavity and covers the cross-sectional area of ​​the liquid storage cavity on its side. The thickening plate has a plurality of liquid permeation holes on its surface for moving up and down in the liquid storage cavity under the drive of the thickening drive component to perform thickening treatment.

[0014] In some embodiments, the dense drive is any one of a cylinder, a hydraulic cylinder, or an electric actuator.

[0015] In some embodiments, the reflux structure includes a reflux pipe and a circulation pump. A three-way valve is provided on the feed pipe of the filter press mechanism. One end of the reflux pipe is connected to the discharge port of the thickening mechanism, and the other end is connected to the feed pipe of the filter press mechanism through the three-way valve. The circulation pump is provided on the reflux pipe and is used to transport the thickened material back to the filter press chamber through the reflux pipe.

[0016] Compared with the prior art, the filter press device provided by this utility model collects the filtrate discharged from the filter press mechanism into the storage chamber through a collection structure. Then, the filtrate in the storage chamber is concentrated by the thickening component of the thickening mechanism integrated in the collection chamber, which causes the fine particles in the filtrate to settle and improves the purity of the filtrate discharged from the outlet. At the same time, the concentrated material is sent back to the filter press mechanism through the return structure. The filter cake formed in the chamber can be used to perform secondary filtering on the concentrated material rich in fine particles, which can deeply intercept the extremely fine particles that penetrated in the primary filtration, thereby significantly improving the product yield and the quality of the final filtrate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the filter press device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the main cross-sectional structure of the filter press device provided in this embodiment of the utility model; Figure 3 This is a side view cross-sectional structural schematic diagram of the filter press device provided in this embodiment of the utility model; Figure 4 This is a side view of the filter press device provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Filter press mechanism; 101. Feed pipe; 102. Three-way valve; 103. Filter residue inlet; 11. Filter press cylinder; 12. Extrusion component; 121. Screw rod; 13. Extrusion drive component; 131. Motor; 132. Pulley; 133. Belt; 14. Base; 15. Baffle plate; 16. Fixing frame; 2. Collection structure; 21. Liquid storage chamber; 22. Drain outlet; 23. Material discharge outlet; 3. Thickening mechanism; 31. Thickening component; 311. Thickening plate; 32. Thickening drive component; 4. Reflux structure; 41. Reflux pipe; 42. Circulation pump; 5. Liquid collection structure; 51. Liquid collection hopper; 52. Liquid collection pipe; 53. Liquid collection pump; 6. Clean water tank; 61. Drain outlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problems of low resource recovery rate and insufficient retention of useful substances, this utility model provides a pressure filter device that organically combines pressure filtration, collection, concentration and reflux functions to form a complete and efficient material processing system. It realizes further concentration treatment of the filtrate after pressure filtration and material reflux and re-pressure filtration, effectively improving the resource recovery rate and utilization efficiency.

[0021] Please see Figures 1 to 4 The filter press device includes a filter press mechanism 1, a collection structure 2, a thickening mechanism 3, and a reflux structure 4. The filter press mechanism 1 has a filter press chamber and a feed pipe 101, a filtrate outlet, and a filter cake outlet 103 connected to the filter press chamber. The collection structure 2 has a storage chamber 21 and a discharge port 22 and a discharge port 23 connected to the storage chamber 21. The inlet of the storage chamber 21 is connected to the filtrate outlet of the filter press mechanism 1. The thickening mechanism 3 includes a thickening element 31 disposed within the storage chamber 21 and located between the discharge port 22 and the discharge port 23, and a thickening drive element 32 connected to the thickening element 31. The thickening element 31 is used to thicken the filtrate collected in the storage chamber 21 under the drive of the thickening drive element 32. The reflux structure 4 connects the discharge port 23 of the thickening mechanism 3 to the feed pipe 101 of the filter press mechanism 1, and is used to return the thickened material to the filter press chamber.

[0022] In this device, the filter press mechanism 1 has a filter press chamber and a feed pipe 101, a filtrate outlet, and a filter cake outlet 103 connected to the filter press chamber. The slurry enters the filter press chamber through the feed pipe 101. The filter press mechanism 1 can first filter and separate the material entering the filter press chamber to obtain filtrate and filter cake. The filtrate and filter cake are discharged through the filtrate outlet and filter cake outlet 103, respectively. The collection structure 2 can collect the filtrate discharged by the filter press mechanism 1 into the storage chamber 21. The thickening mechanism 3, driven by the thickening drive 32, thickens the filtrate in the storage chamber 21 through the thickening component 31, so that the fine particles in the filtrate can be further settled. Finally, the thickened material obtained after thickening can be sent back to the filter press chamber of the filter press mechanism 1 through the set reflux structure 4. The filter cake formed in the filter press chamber is used to filter the thickened material again, thereby realizing the recycling of resources and improving the recovery rate.

[0023] To provide a compact filter press solution capable of continuous feeding and slag discharge, please refer to [link to relevant documentation]. Figure 1 and Figure 2In some possible embodiments, the filter press mechanism 1 consists of a filter press cylinder 11, an extruder 12, and an extrusion drive 13. The filter press cylinder 11 is arranged horizontally, with one end connected to the feed pipe 101 and the other end provided with a filter residue port 103. Filter holes are provided on the circumferential wall of the filter press cylinder 11. The extruder 12 is disposed inside the filter press cylinder 11. The extrusion drive 13 is connected to the extruder 12 and is used to drive the extruder 12 to move inside the filter press cylinder 11 to perform a filter press operation on the material entering the filter chamber, so that the liquid in the slurry seeps out through the filter holes to form filtrate and is discharged from the filtrate outlet, while the solid is squeezed into filter residue and discharged from the filter residue port 103.

[0024] To achieve stable material conveying and effective compression, forming a uniform filter cake layer, please refer to [link / reference needed]. Figures 1 to 3 In some specific embodiments, the extrusion member 12 includes a spiral rod 121, which is arranged axially along the filter press cylinder 11, and the spiral blades formed on its outer periphery are in contact with the inner wall of the filter press cylinder 11. The extrusion drive member 13 includes a motor 131 and a transmission structure, which is a belt structure, including a belt 133 and two pulleys 132. The motor 131 is mounted on the base 14 of the filter press cylinder 11, and the two pulleys 132 are respectively fitted with the output shaft of the motor 131 and the central shaft of the spiral rod 121. The belt 133 is sleeved on the two pulleys 132. Driven by the motor 131, the belt 133 drives the two pulleys 132 to rotate, thereby causing the spiral rod 121 to rotate inside the filter press cylinder 11. When the screw 121 rotates, its spiral blades continuously push the material entering the filter press cylinder 11 towards the filter cake inlet 103. During this pushing process, the material is squeezed by the spiral blades and the inner wall of the filter press cylinder 11. Liquid seeps out through the filter holes to form filtrate, while solids are gradually squeezed into a uniform filter cake layer, which is finally discharged from the filter cake inlet 103. The screw 121 can also be driven to rotate back and forth by adjusting the working mode of the motor 131, which can further optimize the material squeezing effect and make the formed filter cake layer denser and more uniform.

[0025] Please see Figure 1 , Figure 2 and Figure 4Furthermore, a baffle plate 15 and a fixing frame 16 are provided at the filter cake inlet 103 of the filter press cylinder 11. A rotatable locking block is provided on the outside of the filter cake inlet 103 of the filter press cylinder 11. The fixing frame 16 is fixed to the slag discharge end of the filter press cylinder 11 and avoids the position of the filter cake inlet 103. The baffle plate 15 corresponds to the position of the filter cake inlet 103 and can slide on the fixing frame 16. When it slides to the position of the filter cake inlet 103, the locking block can be rotated to one side of the baffle plate 15, thereby fixing the baffle plate 15 at the filter cake inlet 103 and blocking the material. When it is necessary to discharge the slag, the locking block is rotated to the outside of the baffle plate 15 to release the fixing of the baffle plate 15. The baffle plate 15 can then be moved away from the position of the filter cake inlet 103 under the action of external force, so that the filter cake can be discharged smoothly from the filter cake inlet 103.

[0026] Of course, in other embodiments, the filter press mechanism 1 can also adopt the structure of a plate and frame filter press or a chamber filter press, forming a filter press chamber through the alternating arrangement of filter plates and filter frames, and using a hydraulic cylinder for periodic pressing and unloading. The extrusion member 12 can also adopt the structure of a piston or an extrusion diaphragm, intermittently pressurizing the material through linear reciprocating motion. The transmission structure can also be a gearbox mechanism; the extrusion drive member 13 can also adopt the structure of a hydraulic motor directly driving the screw rod 121.

[0027] To more effectively collect the filtrate discharged circumferentially from the filter press 11 and guide it to the collection structure 2, please refer to... Figure 2 In some possible embodiments, the filter press device further includes a liquid collection structure 5, which includes a liquid collection hopper 51, a liquid collection pipe 52, and a liquid collection pump 53. The top of the liquid collection hopper 51 corresponds to the filtrate outlet of the filter press cylinder 11, and the bottom is connected to the liquid collection pipe 52. The cross-sectional area of ​​the filter press cylinder 11 gradually decreases from top to bottom, forming a liquid collection chamber. The end of the liquid collection pipe 52 away from the liquid collection hopper 51 is connected to the liquid storage chamber 21 of the collection structure 2. The liquid collection pump 53 is installed on the liquid collection pipe 52. After the material in the filter press cylinder 11 undergoes the filter press operation, the filtrate is discharged through the filtrate outlet. The liquid collection hopper 51 can effectively collect the dispersed filtrate. The filtrate collected in the liquid collection hopper 51 is transported to the liquid storage chamber 21 of the collection structure 2 through the liquid collection pipe 52 under the action of the liquid collection pump 53.

[0028] Further, please refer to Figure 2 In some possible embodiments, the collection hopper 51 is positioned biased towards the filter cake inlet 103 of the filter press cylinder 11, and the filter press cylinder 11 has filter holes corresponding to the position of the collection hopper 51. This allows the filtrate to flow more concentratedly to the collection hopper 51, improving the filtrate collection efficiency. Simultaneously, because the collection hopper 51 is biased towards the filter cake inlet 103, the concentrated material returned to the filter press chamber via the reflux structure 4 can be easily filtered again through the filter cake layer in the filter press mechanism 1 when it enters the filter press chamber.

[0029] Of course, in other embodiments, the liquid collection structure 5 can also adopt other structural forms. For example, it can adopt an annular liquid collection tank surrounding the filter press cylinder 11, with multiple liquid inlets corresponding to the filter holes of the filter press cylinder 11 on the annular liquid collection tank, and a liquid outlet pipe connected to the liquid storage chamber 21 of the collection structure 2 at the bottom, with a liquid collection pump 53 installed on the liquid outlet pipe. This structure can collect the filtrate discharged from the filter press cylinder 11 from all directions.

[0030] For instructions on storing and treating the final purified filtrate, please refer to [link / reference]. Figure 2 In this embodiment, the filter press also includes a clean water tank 6, which is connected to the drain port 22 via a pipe. The capacity of the clean water tank 6 can be designed according to actual needs to ensure that it can store a sufficient amount of clean filtrate. A liquid level sensor can be installed inside the clean water tank 6 to monitor the liquid level in real time. When the liquid level reaches the set upper limit, the sensor will send a signal to remind the operator to process or discharge the clean filtrate in time to prevent the clean water tank 6 from overflowing. At the same time, a drain port 61 is provided at the bottom of the clean water tank 6, and a drain valve is installed at the drain port 61. By controlling the opening and closing of the drain valve, the processed clean filtrate can be easily discharged.

[0031] To accelerate the sedimentation and concentration of fine particles in the filtrate through mechanical extrusion, please refer to [link to relevant documentation]. Figure 2 and Figure 3 In some possible embodiments, the collection structure 2 adopts a box-type structure, and the thickening component 31 includes a thickening plate 311, which is horizontally disposed inside the liquid storage chamber 21. Its shape is adapted to the cross-sectional shape of the liquid storage chamber 21, allowing the thickening plate 311 to move up and down tightly against the inner wall of the liquid storage chamber 21. Multiple liquid permeation holes are formed on the surface of the thickening plate 311. The thickening drive component 32 is any one of a cylinder, hydraulic cylinder, or electric push rod. The thickening drive component 32 is mounted on the collection structure 2, and its output end passes through the box wall of the collection structure 2 and connects to the thickening plate 311. During operation, the thickening drive 32 drives the thickening plate 311 to reciprocate up and down in the liquid storage chamber 21. When the thickening plate 311 moves downward, it will squeeze the filtrate in the liquid storage chamber 21, causing the fine particles in the filtrate to settle faster under pressure and deposit downward through the liquid permeation holes on the thickening plate 311. When the thickening plate 311 moves upward, it will drive the filtrate above to flow, promote the uniform mixing of the filtrate, and further improve the thickening effect.

[0032] Of course, in other embodiments, the thickening element 31 can also adopt the structure of inclined tube packing or inclined plate packing group to achieve thickening statically by increasing the settling area; or, the thickening element 31 can be a slowly rotating sludge scraper, in which case the thickening drive element 32 can be a geared motor 131, which is connected to the sludge scraper through a transmission shaft, driving the sludge scraper to rotate slowly in the liquid storage chamber 21.

[0033] To reliably pump the concentrated material back to filter press 1 and achieve closed-loop processing, please refer to [link to relevant documentation]. Figures 1 to 4 In some possible embodiments, the reflux structure 4 includes a reflux pipe 41 and a circulation pump 42. The inlet end of the reflux pipe 41 is connected to the discharge port 23 of the thickening mechanism 3. A three-way valve 102 is provided on the feed pipe 101 of the filter press cylinder 11. One port of the three-way valve 102 is connected to the feed pipe 101, and the other two ports are respectively connected to an external feed source and the outlet end of the reflux pipe 41. The circulation pump 42 is installed on the reflux pipe 41 and is used to provide power to transport the thickened material discharged from the discharge port 23 of the thickening mechanism 3 back to the filter press chamber of the filter press mechanism 1 through the reflux pipe 41. When an external feed source is required, the three-way valve 102 is adjusted to connect with the external feed source, allowing external materials to enter the filter press chamber for filtration. When material return processing is required, the three-way valve 102 is adjusted to connect with the return pipe 41. At this time, the circulation pump 42 is started, pumping the concentrated material back to the filter press chamber, and the filter cake formed in the filter press chamber is used again to filter the concentrated material, realizing the recycling of resources.

[0034] To better understand this utility model, the following is combined with... Figures 1 to 4 The technical solution of this utility model is described in detail as follows: The slurry enters the filter chamber of the filter press mechanism 1 through the feed pipe 101. After preliminary filter separation, the filter cake is discharged from the filter cake port 103, and the filtrate enters the storage chamber 21 of the collection structure 2 through the filtrate outlet. The thickening mechanism 3 in the storage chamber 21 is activated. The thickening element 31, under the action of the thickening drive element 32, thickens the filtrate, promoting the sedimentation of fine particles. After thickening, the clear liquid at the top is discharged from the drain port 22 to the clear water tank 6, while the concentrated material at the bottom is sent back to the feed pipe 101 of the filter press mechanism 1 through the reflux structure 4 and enters the filter chamber for secondary filter pressing. By using the filter cake formed in the filter chamber as the filter medium, the extremely fine particles that penetrate during the initial filtration can be effectively intercepted, thereby significantly improving the product yield and the purity of the final filtrate.

[0035] The filter press device provided by this utility model collects the filtrate discharged from the filter press mechanism 1 into the storage chamber 21 through the collection structure 2. The filtrate in the storage chamber 21 is concentrated by the thickening component 31 of the thickening mechanism 3 integrated in the collection chamber, so that the fine particles in the filtrate settle down and the purity of the filtrate discharged from the outlet 22 is improved. At the same time, the concentrated material is sent back to the filter press chamber of the filter press mechanism 1 through the return structure 4. The filter cake formed in the chamber can be used to perform secondary filtering on the concentrated material rich in fine particles, which can deeply intercept the extremely fine particles that penetrated in the primary filtration, thereby significantly improving the product yield and the quality of the final filtrate.

[0036] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0037] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A filter press device, characterized in that, include: A filter press mechanism has a filter press chamber and a feed pipe, a filtrate outlet and a filter residue outlet communicating with the filter press chamber; The collection structure has a liquid storage chamber and a drain outlet and a discharge outlet communicating with the liquid storage chamber. The inlet of the liquid storage chamber is connected to the filtrate outlet of the filter press mechanism. A thickening mechanism includes a thickening component disposed in a liquid storage chamber and located between a liquid outlet and a discharge outlet, and a thickening drive component connected to the thickening component. The thickening component is used to thicken the filtrate collected in the liquid storage chamber under the drive of the thickening drive component. as well as A reflux structure connects the discharge port of the thickening mechanism to the feed pipe of the filter press mechanism, so as to send the thickened material into the filter press chamber.

2. The filter press according to claim 1, characterized in that, The filter press mechanism includes a filter press cylinder, an extruder, and an extrusion drive. The filter press cylinder is horizontally arranged, with one end connected to the feed pipe and the other end provided with the filter residue inlet. Filter holes are provided on the circumferential wall of the filter press cylinder. The extruder is disposed inside the filter press cylinder. The extrusion drive is connected to the extruder and is used to drive the extruder to move inside the filter press cylinder to perform a filter press operation on the material entering the filter chamber.

3. The filter press according to claim 2, characterized in that, The extrusion component includes a screw rod arranged along the axial direction of the filter press cylinder, and the spiral blades formed on its outer periphery are in contact with the inner wall of the filter press cylinder.

4. The filter press according to claim 3, characterized in that, The extrusion drive includes a motor and a transmission structure. The motor is connected to the screw rod through the transmission structure and is used to drive the screw rod to rotate around its own axis, so as to push the material entering the filter chamber toward the filter residue inlet.

5. The filter press according to claim 1, characterized in that, It also includes a liquid collection structure having a liquid collection cavity with a cross-sectional area that gradually decreases from its inlet to its outlet. The inlet of the liquid collection structure is connected to the filtrate outlet of the filter press mechanism, and the outlet of the liquid collection structure is connected to the liquid storage cavity of the collection structure.

6. The filter press according to claim 5, characterized in that, The inlet of the liquid collection structure is biased toward the filter cake port of the filter press mechanism.

7. The filter press according to claim 1, characterized in that, It also includes a clean water tank, which is connected to the drain outlet.

8. The filter press according to claim 1, characterized in that, The thickening component includes a thickening plate, which is horizontally disposed inside the liquid storage cavity and covers the cross-sectional area of ​​the liquid storage cavity on its side. The thickening plate has multiple liquid permeation holes on its surface, which are used to move up and down in the liquid storage cavity under the drive of the thickening drive component to perform thickening treatment.

9. The filter press according to claim 1, characterized in that, The dense drive component is any one of a cylinder, a hydraulic cylinder, or an electric actuator.

10. The filter press according to claim 1, characterized in that, The reflux structure includes a reflux pipe and a circulation pump. A three-way valve is installed on the feed pipe of the filter press mechanism. One end of the reflux pipe is connected to the discharge port of the thickening mechanism, and the other end is connected to the feed pipe of the filter press mechanism through the three-way valve. The circulation pump is installed on the reflux pipe and is used to transport the thickened material back to the filter press chamber through the reflux pipe.

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