Sludge dewatering device and dewatering method

Abstract

The present application relates to sludge treatment technical field, especially point to a kind of sludge dewatering device and dewatering method, solve the sludge dewatering in prior art after inconvenient removal, cannot carry out continuous work Problem, dewatering device includes dehydration cylinder, cover plate is movably connected on dehydration cylinder, cover plate and the opening position of dehydration cylinder correspond, dehydration cylinder is equipped with filter pressing assembly;Filter pressing assembly includes filter plate movably arranged in the inside of dehydration cylinder, filter plate and cover plate form sludge chamber, sludge chamber is equipped with mud block crushing assembly.Affirmative effect is: sludge is dewatered in sludge chamber, and through mud block crushing assembly, the mud block after dewatering is crushed, so that mud block is loose, easy to carry out mud block cleaning;After cover plate and dehydration cylinder separate, the mud block after crushing can be pushed out of dehydration cylinder by the movement of filter plate, and then the discharge of mud block after dewatering is realized, and then make sludge dewatering device can carry out continuous sludge dewatering work, improve sludge dewatering efficiency.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and in particular to a sludge dewatering device and dewatering method. Background Technology

[0002] Tunnel boring machines (TBMs) face complex human factors during construction. Groundwater, water from rock fissures, dust suppression or flushing water, drilling wastewater, spilled mortar, and concrete slurry lost during grouting operations mix with soil and sand particles in the strata, eventually generating large amounts of wastewater and sludge inside the tunnel. This severely impacts the tunnel environment and construction efficiency. Currently, tunnel sludge and wastewater require centralized collection and treatment. The industry standardizes external transportation of tunnel wastewater and sludge, typically employing three-stage sedimentation and chemical dosing for pre-separation of the sludge and water. The concentrated sludge is then dewatered using plate and frame filter presses, centrifugal dewatering machines, and other sludge dewatering devices.

[0003] For tunnels with low water inflow and relatively low sewage and sludge volumes, relying on external transportation to a large-scale sewage treatment system on the surface is complex and costly. Furthermore, upgrading conventional dewatering equipment requires significant space. For example, patent CN102267794A discloses a sludge dewatering machine, including a frame and a support plate connected to it. On both sides of the support plate are a sludge pumping mechanism and a pressure squeezing mechanism. A frame-plate filter press mechanism is installed between the pressure squeezing mechanism and the support plate. The filter press mechanism includes a filter unit, which also contains a filter plate. An annular sleeve is fitted on the outer periphery of the filter plate. The filter plate and the front pressure plate form a filter chamber. Filter cloth is laid on the surface of the filter plate within the filter chamber. Filtrate drainage holes are opened on the surface of the filter plate, connecting to a drainage path inside the filter plate that extends to the outside. The filter plate and the rear pressure plate are integrated, with a through hole in the middle connecting to the pipeline of the sludge pumping mechanism.

[0004] The aforementioned sludge dewatering machine can improve the filter press efficiency and control the dryness of the sludge cake by arranging a squeezing mechanism on both sides of the plate and frame mechanism and a sludge pumping mechanism connected to the drain pipe. However, after sludge dewatering, the sludge will adhere to the inner wall of the filter press chamber, resulting in the sludge being unable to be discharged. This causes the sludge dewatering device to be unable to work continuously, affecting the sludge dewatering efficiency. Summary of the Invention

[0005] This invention proposes a sludge dewatering device and method, which solves the problems of inconvenient sludge removal after dewatering and the inability to carry out continuous operation in the prior art.

[0006] The technical solution of this invention is implemented as follows: A sludge dewatering device includes a dewatering cylinder with a cover plate movably connected to it, the cover plate corresponding to the opening of the dewatering cylinder. A filter press assembly is installed inside the dewatering cylinder. The filter press assembly includes filter plates movably disposed inside the dewatering cylinder, the filter plates and the cover plate forming a sludge chamber. A sludge crushing assembly is installed inside the sludge chamber. The filter plates move within the dewatering cylinder to press and dewater the sludge in the sludge chamber, and the sludge crushing assembly tears and breaks up the dewatered sludge lumps, making them loose and facilitating the discharge of dewatered sludge lumps when the cover plate is open. This allows the sludge dewatering device to perform continuous dewatering operations, improving sludge dewatering efficiency.

[0007] The sludge crushing assembly includes at least one pull rope, one end of which is connected to a cover plate, and the other end of which is connected to a filter plate. The rotation and linear motion of the filter plate can drive the pull rope to twist or straighten. When the pull rope twists, the sludge wraps around the pull rope, and when the pull rope straightens, the pull rope cuts and crushes the sludge, so that the sludge after dewatering can achieve the effect of being crushed and loosened.

[0008] The dewatering tank includes a cylinder with a cylindrical sealing plate at one end. A cover plate seals the other end of the cylinder, and the filter plate and the cylindrical sealing plate form a filtration chamber. Water extracted from the sludge passes through the filter plate into the filtration chamber and is then discharged from the filtration chamber, thus achieving the reuse of the filtered water.

[0009] The filter press assembly also includes a filter press rod, one end of which is connected to the filter plate, and the other end of which passes through the cylindrical sealing plate and is connected to the drive mechanism. The drive mechanism drives the filter plate to rotate and move linearly within the dewatering cylinder via the filter press rod. This achieves the filtration of sludge and the crushing of sludge lumps after dewatering.

[0010] The cylindrical sealing plate is provided with a first fixed bracket, and the cover plate is provided with a second fixed bracket. The first fixed bracket is connected to the second fixed bracket via a telescopic drive component. The telescopic drive component can adjust the distance between the first and second fixed brackets, thereby adjusting the relative position of the cover plate and the dewatering cylinder. Specifically, during sludge dewatering, the cover plate is in close contact with the dewatering cylinder; during sludge discharge, the cover plate moves away from the dewatering cylinder, and the sludge is discharged from the gap between the cover plate and the dewatering cylinder, facilitating continuous dewatering operation of the dewatering device.

[0011] The cylinder has a water outlet on its side wall, which is connected to the filtration chamber; the cover plate has a feed inlet, which is connected to the sludge chamber. The feed inlet is located at the center of the cover plate, and sludge enters the sludge chamber through the feed inlet.

[0012] The filter plate is provided with filter holes and is covered with filter cloth. Water in the sludge passes through the filter holes and filter cloth into the filtered water chamber and is discharged.

[0013] A dewatering method using the aforementioned sludge dewatering device includes a sludge pressing process, a sludge lumps stirring or crushing process, and a sludge lumps discharge process. During the sludge pressing process, the dewatering cylinder contacts the cover plate, the filter plate moves closer to the cover plate, and the filter plate applies pressure to the sludge in the sludge chamber. Water in the sludge passes through the filter plate and enters the filtered water chamber, resulting in sludge lumps after dewatering. During the sludge lumps crushing process, the dewatering cylinder contacts the cover plate, the filter plate moves away from the cover plate, and the sludge lumps are stirred or torn apart by the sludge lumps crushing component. By tearing apart the sludge lumps after pressing by the sludge lumps crushing component, the sludge lumps are kept in a loose state in the sludge chamber, facilitating sludge lumps cleaning.

[0014] During the sludge dewatering process, the filter plate moves closer to the cover plate while rotating, causing the pull rope to contract and twist, and the rope is enveloped by the dewatered sludge. During the sludge mixing or crushing process, the filter plate moves away from the cover plate while rotating, pulling the pull rope to straighten, and the rope mixes or cuts the sludge. The direction of rotation when the filter plate is closer to the cover plate is opposite to the direction of rotation when it is farther away. Utilizing the flexible deformation characteristics of the pull rope, the sludge can be enveloped during dewatering, and the rotation of the filter plate causes the pull rope to be in an irregular bending state within the sludge. Once the pull rope straightens, it can cut the sludge, thus crushing it.

[0015] During the sludge discharge process, the cover plate separates from the dewatering cylinder, and the filter plate moves closer to the cover plate. This movement pushes the sludge blocks out of the dewatering cylinder, allowing them to exit through the gap between the cover plate and the cylinder. After sludge dewatering is complete, the sludge blocks can be discharged by opening the cover plate, thus cleaning the sludge chamber. This allows the dewatering device to fully realize the entire process of sludge injection, dewatering, and discharge, enabling continuous operation and improving sludge dewatering efficiency.

[0016] The beneficial effects of this invention are: 1. After the sludge is dewatered in the sludge chamber, the sludge is crushed by the sludge crushing component, so that the sludge remains in a loose state, preventing the sludge from adhering to the inner wall of the sludge chamber and making it easier to clean the sludge.

[0017] 2. After the cover plate separates from the dewatering cylinder, the movement of the filter plate can push the crushed sludge out of the dewatering cylinder, thereby realizing the discharge of the dewatered sludge. This allows the sludge dewatering device to completely realize the entire process of sludge injection, dewatering and discharge, enabling the dewatering device to carry out continuous sludge dewatering work and improve sludge dewatering efficiency.

[0018] 3. After a certain amount of sludge is injected into the sludge chamber, the filter plate can rotate and move linearly in the dewatering cylinder multiple times, so that the sludge injected into the sludge chamber at one time can undergo multiple dewatering and crushing processes, thereby enabling the sludge to be fully dewatered and improving the dewatering rate; and the dewatering rate can be controlled to meet the requirements of different working conditions in tunnel construction.

[0019] 4. The dewatering device adopts a cylindrical structure and the filter press assembly is set inside the cylinder, making the dewatering device compact and adaptable to the limited space inside the tunnel, reducing transportation costs and improving cleaning efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the sludge dewatering device according to the present invention; Figure 2 This is a schematic diagram of the dehydration tank structure; Figure 3 Schematic diagram of the cover plate, mud crushing component and filter press component; Figure 4 This is a schematic diagram of the filter plate structure; Figure 5 This is a schematic diagram of the rope structure; Figure 6 This is a schematic diagram of the mud discharge process.

[0022] In the diagram: 1. Dewatering cylinder, 11. Cylinder, 12. Cylinder sealing plate, 13. Outlet, 14. First fixing bracket, 2. Filter press assembly, 21. Cover plate, 22. Filter press rod, 23. Pull rope, 24. Feed inlet, 25. Second fixing bracket, 26. Pull rope fixing bolt, 221. Filter plate, 3. Telescopic cylinder, 4. Sludge chamber, 5. Filter water chamber. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1, as Figure 1 , Figure 3 As shown, a sludge dewatering device includes a dewatering cylinder 1, with a cover plate 21 movably connected to the dewatering cylinder 1. The cover plate 21 corresponds to the opening of the dewatering cylinder 1. A filter press assembly 2 is provided inside the dewatering cylinder 1. The filter press assembly 2 includes a filter plate 221 movably disposed inside the dewatering cylinder 1. The filter plate 221 and the cover plate 21 form a sludge chamber 4, and a sludge crushing assembly is provided inside the sludge chamber 4. After sludge is introduced into the sludge chamber 4, the filter plate 221 moves within the dewatering cylinder 1, changing the volume of the sludge chamber 4, thereby dewatering the sludge inside the sludge chamber 4. The sludge lumps formed after dewatering are torn and broken by the sludge crushing assembly, making the sludge lumps loose and facilitating the cleaning of the sludge lumps inside the sludge chamber 4. When the sludge lumps in the sludge chamber 4 are full, the cover plate 21 can be opened to discharge the sludge lumps from the sludge chamber 4, enabling the dewatering device to perform continuous sludge dewatering work and improving the sludge dewatering efficiency.

[0025] Furthermore, such as Figure 3 , Figure 5 As shown, the sludge crushing assembly includes at least one pull rope 23. One end of the pull rope 23 is connected to the cover plate 21, and the other end is connected to the filter plate 221. The filter plate 221 rotates and moves linearly within the dewatering cylinder 1. In this embodiment, there are four pull ropes 23. When the pull ropes 23 are taut, the four pull ropes 23 are arranged symmetrically about the rotation axis of the filter plate 221. Both the cover plate 21 and the filter plate 221 are provided with pull rope fixing bolts 26. The ends of the pull ropes 23 are sleeved on the pull rope fixing bolts 26, and nuts are connected to the pull rope fixing bolts 26. Tightening the nuts fixes the ends of the pull ropes 23, thereby fixing the pull ropes 23 within the sludge chamber 4. As the filter plate 221 approaches the cover plate 21 through rotation and linear movement, the pull rope 23 bends and twists. The dewatered sludge will wrap around the pull rope 23. As the filter plate 221 moves away from the cover plate 21, the pull rope 23 stretches from the bent and twisted state to a straight state. During the deformation process of the pull rope 23, the pull rope 23 will cut and break the sludge blocks, keeping the sludge blocks in a loose state, which facilitates multiple dewatering operations of the sludge and subsequent sludge block discharge operations.

[0026] Furthermore, such as Figure 2 As shown, the dewatering tank 1 includes a cylinder 11, with a cylindrical sealing plate 12 at one end. A cover plate 21 is fitted to the other end of the cylinder 11, and a filter plate 221 and the cylindrical sealing plate 12 form a filtration chamber 5. An annular sealing ring is provided between the end face of the cylinder 11 and the cover plate 21. When the cover plate 21 contacts the cylinder 11, the annular sealing ring seals the gap between the cylinder 11 and the cover plate 21, ensuring the overall airtightness of the sludge chamber 4, thereby preventing water in the sludge from leaking out from the gap between the cylinder 11 and the cover plate 21.

[0027] Furthermore, the filter press assembly 2 also includes a filter press rod 22, one end of which is connected to the filter plate 221, and the other end of which passes through the cylindrical sealing plate 12 and is connected to the drive mechanism. In this embodiment, the filter press rod 22 is fixedly connected to the filter plate 221; the drive mechanism includes a drive motor and a telescopic hydraulic cylinder, the output end of which is connected to the end of the filter press rod 22, and the drive motor drives the filter press rod 22 to rotate; the telescopic hydraulic cylinder is arranged parallel to the filter press rod 22, and is connected to the drive motor. The extension and retraction of the telescopic hydraulic cylinder can drive the drive motor to move linearly, thereby driving the filter press rod 22 to move linearly. Through the cooperation of the telescopic hydraulic cylinder and the drive motor, the filter press rod 22 can be driven to rotate and move linearly synchronously, thereby driving the filter plate 221 to rotate and move linearly.

[0028] Example 2 differs from Example 1 in that it includes a sludge dewatering device. The sludge crushing assembly comprises multiple elastic rods, one end of which is connected to a filter plate 221, and the other end is connected to a cover plate 21. The filter plate 221 moves linearly within the dewatering cylinder 1. The filter press assembly 2 also includes a filter press rod 22, which is connected to the filter plate 221 and passes through a cylindrical sealing plate 12 to connect to a drive mechanism. In this embodiment, there are 6 elastic rods, which are arranged symmetrically in a central position. When the filter plate 221 moves close to the cover plate 21 through a linear motion, the filter plate 221 and the cover plate 21 compress the elastic rods, causing the elastic rods to bend and deform. At the same time, the filter plate 221 presses and filters the sludge in the sludge chamber 4. The bent elastic rods are wrapped by the dewatered sludge. When the filter plate 221 moves away from the cover plate 21, the elastic rods change from a bent state to a straight state. During the deformation process, the elastic rods cut and break the sludge blocks, making the sludge blocks loose, which facilitates multiple dewatering operations of the sludge and subsequent sludge block discharge operations.

[0029] In addition, in this embodiment, the filter rod 22 is fixedly connected to the filter plate 221; the driving mechanism includes a telescopic hydraulic cylinder, which is arranged in parallel with the filter rod 22 and connected to the filter rod 22. The extension and retraction of the telescopic hydraulic cylinder can drive the filter rod 22 to move linearly, thereby driving the filter plate 221 to move linearly.

[0030] Example 3 differs from Example 1 in that a sludge dewatering device, the filter press assembly 2 further includes a filter press rod 22, which is connected to the filter plate 221. The filter press rod 22 passes through the cylindrical sealing plate 12 and is connected to the drive mechanism. In this example, the filter press rod 22 is a screw, one end of which is fixedly connected to the filter plate 221. A nut is provided on the cylindrical sealing plate 12, and the screw and nut are threadedly engaged. The drive mechanism includes a telescopic hydraulic cylinder, which is arranged parallel to the filter press rod 22. The other end of the telescopic hydraulic cylinder is rotatably connected to the filter press rod 22. The extension and retraction of the telescopic hydraulic cylinder can drive the filter press rod 22 to perform linear motion. During the linear motion of the filter press rod 22, due to the cooperation between the screw and the nut, the filter press rod 22 rotates. At this time, the filter press rod 22 can drive the filter plate 221 to rotate and move linearly.

[0031] Example 4 differs from Example 1 in that it includes a sludge dewatering device. The inner wall of the cylinder 11 is provided with a spiral groove, and a slider is provided at the edge of the filter plate 221. The slider slides in conjunction with the spiral groove. The filter press assembly 2 also includes a filter press rod 22, which is rotatably connected to the filter plate 221. The filter press rod 22 passes through the cylindrical sealing plate 12 and is connected to a telescopic hydraulic cylinder. The telescopic hydraulic cylinder is arranged parallel to the filter press rod 22. The extension and retraction of the telescopic hydraulic cylinder can drive the filter press rod 22 to move linearly, thereby causing the filter press rod 22 to drive the filter plate 221 to move linearly within the dewatering cylinder 1. Furthermore, due to the cooperation between the spiral groove and the slider, the filter plate 221 can rotate while moving linearly.

[0032] Example 5, based on Example 1, provides a sludge dewatering device. A first fixing seat 14 is provided on the cylindrical sealing plate 12, and a second fixing seat 25 is provided on the cover plate 21. The first fixing seat 14 is connected to the second fixing seat 25 via a telescopic drive component. In this example, the telescopic drive component is a telescopic hydraulic cylinder 3. Three telescopic hydraulic cylinders 3 are evenly arranged on the outside of the cylindrical 11. When the telescopic hydraulic cylinders 3 extend or retract, they can adjust the distance between the cover plate 21 and the cylindrical sealing plate 12, thereby achieving contact or separation between the cover plate 21 and the opening of the dewatering cylinder 1. Specifically, during the dewatering process, the cover plate 21 contacts the opening of the dewatering cylinder 1; during the sludge discharge process, the cover plate 21 separates from the opening of the dewatering cylinder 1, allowing the sludge to be discharged from the gap between the cover plate 21 and the dewatering cylinder 1.

[0033] Furthermore, a water outlet 13 is provided on the side wall of the cylinder 11, which is connected to the filter water chamber 5; a feed inlet 24 is provided on the cover plate 21, which is connected to the sludge chamber 4. Water in the sludge passes through the filter plate 221 and is then discharged from the water outlet 13, and the discharged water can be reused. In this embodiment, the feed inlet 24 is located in the middle of the cover plate 21, and the sludge enters the sludge chamber 4 through the feed inlet 24. A valve is provided at the feed inlet 24. After a certain amount of sludge is injected into the sludge chamber 4, the valve is closed, keeping the sludge chamber 4 sealed. At this time, the filter plate 221 in the dewatering cylinder 1 moves to achieve pressure filtration and dewatering of the sludge in the sludge chamber 4.

[0034] Furthermore, such as Figure 4 As shown, filter plate 221 is provided with filter holes, and filter cloth is wrapped on filter plate 221. Water in sludge passes through the filter holes and filter cloth into the filtered water chamber 5, and is discharged through the outlet 13.

[0035] Example 6, based on Example 1, provides a dewatering method using the sludge dewatering device, including a sludge pressing process, a sludge block crushing process, and a sludge block discharge process. During the sludge pressing process, the dewatering cylinder 1 contacts the cover plate 21, the filter plate 221 moves closer to the cover plate 21, the filter plate 221 applies pressure to the sludge in the sludge chamber 4, and the water in the sludge passes through the filter plate 221 and enters the filter water chamber 5, forming sludge blocks after dewatering. During the sludge block crushing process, the dewatering cylinder 1 contacts the cover plate 21, the filter plate 221 moves away from the cover plate 21, and the sludge block crushing component tears and crushes the sludge blocks. The filter plate 221 can achieve the sludge pressing and sludge crushing process by making one round trip in the dewatering tank 1. Specifically, when the filter plate 221 moves close to the cover plate 21, the sludge in the sludge chamber 4 is dewatered and filtered. When the filter plate 221 moves away from the cover plate 21, the sludge crushing component tears and crushes the pressed sludge, so that the sludge is in a loose state in the sludge chamber, thus realizing the sludge pressing and sludge crushing process.

[0036] In this embodiment, after a certain amount of sludge is injected into the sludge chamber 4, the filter plate 221 performs a reciprocating motion to carry out the sludge pressing and sludge block crushing process; then the sludge blocks are discharged. This achieves continuous sludge dewatering and improves sludge dewatering efficiency.

[0037] Example 7, based on Example 6, provides a dewatering method using the aforementioned sludge dewatering device. During the sludge pressing process, the filter plate 221 moves closer to the cover plate 21 while rotating, causing the pull rope 23 to contract and twist, with the pull rope 23 being wrapped by the dewatered sludge blocks. During the sludge block crushing process, the filter plate 221 moves away from the cover plate 21 while rotating, pulling the pull rope 23 to straighten, and the pull rope 23 cuts and crushes the sludge blocks. The rotation direction of the filter plate 221 when it is close to the cover plate 21 is opposite to the rotation direction when it is away from the cover plate 21. By utilizing the flexible deformation properties of the pull rope 23, the sludge can be wrapped during filter pressing. Furthermore, since the filter plate 221 rotates while moving in a straight line, it can cause the pull rope 23 to bend and twist, thereby wrapping the pull rope 23 in a bent state with the sludge. When the filter plate 221 moves in the opposite direction, it pulls the pull rope 23 to straighten, and the pull rope 23 cuts the sludge, thus breaking it up.

[0038] In this embodiment, after a certain amount of sludge is injected into the sludge chamber 4, the filter plate 221 performs at least two reciprocating movements to carry out the sludge pressing and sludge block crushing process, and then the sludge block discharge process. The above process repeatedly presses and dewaters the sludge entering the sludge chamber 4, which can effectively improve the sludge dewatering rate and achieve control over the dewatering rate. In addition, during the sludge block crushing process, the pull rope 23 also has the function of stirring the dewatered sludge, so that the water in the sludge can be better discharged when the filter plate 221 performs the next press and dewatering.

[0039] Example 8, based on Example 6 or Example 7, a dewatering method using the sludge dewatering device, such as... Figure 6 As shown, during the mud discharge process, the cover plate 21 separates from the dewatering cylinder 1, and the filter plate 221 moves close to the cover plate 21. The movement of the filter plate 221 pushes the mud out of the dewatering cylinder 1, so that the mud is discharged from the gap between the cover plate 21 and the dewatering cylinder 1. Specifically, after sludge dewatering by filter press, the filter plate 221 is positioned away from the cover plate 21. At this time, the telescopic cylinder 3 between the cover plate 21 and the cylindrical sealing plate 12 extends, creating a gap between the cover plate 21 and the dewatering cylinder 1. The filter plate 221 then moves towards the cover plate 21 inside the dewatering cylinder 1, pushing the sludge blocks out of the dewatering cylinder 1. The dewatered sludge blocks fall through the gap, cleaning the sludge blocks in the sludge chamber 4. After the sludge blocks are cleaned, the telescopic cylinder 3 retracts, and the cover plate 21 re-contacts the dewatering cylinder 1, resealing the sludge chamber 4 and preparing for the next sludge dewatering. Through the sludge block discharge process, the dewatering device can completely realize the entire process of sludge injection, dewatering, and discharge, enabling the dewatering device to work continuously and improving sludge dewatering efficiency.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sludge dewatering device, characterized in that, The system includes a dewatering tank (1), a cover plate (21) is movably connected to the dewatering tank (1), the cover plate (21) corresponds to the opening position of the dewatering tank (1), and a filter press assembly (2) is provided inside the dewatering tank (1); the filter press assembly (2) includes a filter plate (221) movably disposed inside the dewatering tank (1), the filter plate (221) and the cover plate (21) form a sludge chamber (4), and a sludge crushing assembly is provided inside the sludge chamber (4); The mud crushing assembly includes at least one pull rope (23), one end of which is connected to a cover plate (21), and the other end of which is connected to a filter plate (221); the filter plate (221) is capable of a combined rotational and linear motion. During the sludge dewatering process, the filter plate (221) moves close to the cover plate (21) and rotates. The filter plate (221) drives the pull rope (23) to contract and twist. The pull rope (23) is wrapped by the dewatered sludge. During the mud mixing and crushing process, the filter plate (221) moves away from the cover plate (21) and rotates. The filter plate (221) pulls the rope (23) to straighten, and the rope (23) mixes and cuts the mud. The direction of rotation of the filter plate (221) when it is close to the cover plate (21) is opposite to the direction of rotation when it is away from the cover plate (21).

2. The sludge dewatering device according to claim 1, characterized in that, The dehydration tank (1) includes a cylinder (11), one end of which is provided with a cylinder sealing plate (12), and the cover plate (21) is sealed to the other end of the cylinder (11). The filter plate (221) and the cylinder sealing plate (12) form a filter water chamber (5).

3. The sludge dewatering device according to claim 2, characterized in that, The filter press assembly (2) also includes a filter press rod (22), one end of which is connected to the filter plate (221), and the other end of which passes through the cylindrical sealing plate (12) and is connected to the drive mechanism.

4. The sludge dewatering device according to claim 2 or 3, characterized in that, The cylindrical sealing plate (12) is provided with a first fixed bracket (14), and the cover plate (21) is provided with a second fixed bracket (25). The first fixed bracket (14) is connected to the second fixed bracket (25) through a telescopic drive component.

5. The sludge dewatering device according to claim 4, characterized in that, The cylinder (11) has an outlet (13) on its side wall, which is connected to the filter water chamber (5); the cover plate (21) has an inlet (24), which is connected to the sludge chamber (4).

6. The sludge dewatering device according to claim 1 or 5, characterized in that, The filter plate (221) has filter holes and is covered with filter cloth.

7. A dewatering method using the sludge dewatering apparatus as described in any one of claims 1 to 6, characterized in that, This includes the sludge dewatering process, the sludge mixing and crushing process, and the sludge discharge process; During the sludge dewatering process, the dewatering tank (1) contacts the cover plate (21), the filter plate (221) moves close to the cover plate (21), the filter plate (221) applies pressure to the sludge in the sludge chamber (4), and the water in the sludge passes through the filter plate (221) and enters the filter water chamber (5). After the sludge is dewatered, it forms mud blocks. During the mud crushing process, the dewatering cylinder (1) contacts the cover plate (21), the filter plate (221) moves away from the cover plate (21), and the mud crushing component stirs and cuts the mud.

8. The dehydration method according to claim 7, characterized in that, During the mud discharge process, the cover plate (21) separates from the dewatering cylinder (1), and the filter plate (221) moves close to the cover plate (21). The movement of the filter plate (221) pushes the mud out of the dewatering cylinder (1), allowing the mud to be discharged from the gap between the cover plate (21) and the dewatering cylinder (1).

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