Sludge dewatering device and dewatering method

Abstract

The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering device and a sludge dewatering method, and solves the problems that in the prior art, sludge is inconvenient to discharge after being dewatered, and continuous work cannot be carried out, the dewatering device comprises a dewatering cylinder, a cover plate is movably connected to the dewatering cylinder, and the cover plate corresponds to an opening of the dewatering cylinder in position; a filter pressing assembly is arranged in the dewatering cylinder; the filter pressing assembly comprises a filter plate movably arranged in the dewatering cylinder, the filter plate and the cover plate form a sludge chamber, and a mud block crushing assembly is arranged in the sludge chamber. The sludge dewatering device has the beneficial effects that after sludge is dewatered in the sludge chamber, dewatered sludge blocks are crushed through the sludge block crushing assembly, so that the sludge blocks are loosened, and the sludge blocks are convenient to clean; after the cover plate is separated from the dewatering cylinder, crushed mud blocks can be pushed out of the dewatering cylinder through the movement of the filter plate, so that the dewatered mud blocks are discharged, the sludge dewatering device can perform continuous sludge dewatering work, and the sludge dewatering efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering device and a dewatering method. Background Art

[0002] During the construction of shield and TBM, complex human conditions will be faced. Groundwater, rock crack water, spray dust or flushing water, drilling wastewater, dumped mortar, concrete slurry lost from grouting support operations, etc. are mixed with soil and sand in the stratum. Over time, a large amount of sewage and sludge will be generated inside the tunnel. It seriously affects the environment inside the tunnel and the construction efficiency. At present, tunnel sludge and sewage need to go through the stages of centralized sewage collection and sludge treatment. The industry uniformly transports tunnel sewage and sludge outside the tunnel. Generally, tertiary sedimentation and chemical water are used to pre-separate the sludge water, and the concentrated sludge is dehydrated by sludge dehydration devices such as plate and frame filter presses and centrifugal dehydrators.

[0003] For the working conditions where there is less water in the tunnel and the amount of sewage sludge is relatively low, it is more complicated and costly to still use the means of transporting outside the tunnel to the ground for large-scale sewage treatment systems. In addition, no matter how the conventional dehydration equipment is upgraded and iterated, its space occupies a large area. For example, the patent with the publication number CN102267794A discloses a sludge dehydrator, including a frame and a support plate connected thereto, and a sludge pumping mechanism and a pressure extrusion mechanism are respectively provided on both sides of the support plate, wherein a frame plate type filter press mechanism is arranged between the pressure extrusion mechanism and the connecting support plate, and the filter press mechanism includes a filter press unit, and a filter plate is also arranged in the filter press unit. The outer peripheral wall of the filter plate is provided with an annular sleeve, and a filter press cavity is formed between the filter plate and the front pressure plate. Filter cloth is arranged on the filter plate surface in the filter press cavity, and a filtrate drainage hole is provided on the plate surface of the filter plate, and the drainage hole is connected to the drainage passage arranged inside the filter plate and extending to the outside, and the filter plate and the rear pressure plate surface are connected to each other as a whole, and a through hole is opened in the middle to communicate with the pipeline of the sludge pumping mechanism.

[0004] The above-mentioned sludge dewatering machine can improve the filter pressing efficiency and control the sludge cake degree by arranging an extrusion mechanism on both sides of the plate and frame mechanism and a sludge pumping mechanism connected to the drain pipe. However, after the sludge is dewatered, the sludge will adhere to the inner wall of the filter press chamber, and then the sludge cannot be removed, causing the sludge dewatering device to be unable to work continuously, affecting the sludge dewatering efficiency. Summary of the invention

[0005] The invention provides a sludge dewatering device and method, which solve the problems in the prior art that the sludge is inconvenient to remove after dewatering and cannot work continuously.

[0006] The technical solution of the present invention is achieved in this way: A sludge dewatering device includes a dewatering cylinder, a cover plate movably connected to the dewatering cylinder, the cover plate corresponds to the opening position of the dewatering cylinder, and a filter press assembly is arranged in the dewatering cylinder; the filter press assembly includes a filter plate movably arranged in the dewatering cylinder, the filter plate and the cover plate form a sludge chamber, and a mud block crushing assembly is arranged in the sludge chamber. The filter plate moves in the dewatering cylinder to press filter and dewater the sludge in the sludge chamber, and the mud block crushing assembly can tear and crush the dehydrated mud blocks to make the mud blocks in a loose state, which is convenient for discharging the dehydrated mud blocks when the cover plate is opened, so that the sludge dewatering device can perform continuous dehydration work and improve the sludge dehydration efficiency.

[0007] The mud block breaking assembly includes at least one pull rope, one end of which is connected to the cover plate, and the other end of which is connected to the filter plate. The rotation and linear motion of the filter plate can drive the pull rope to twist or straighten. When the pull rope is twisted, the mud block wraps the pull rope, and when the pull rope is straightened, the pull rope cuts and breaks the mud block, so that the mud block after sludge dehydration can be broken and loosened.

[0008] The dehydration cylinder comprises a cylinder, one end of which is provided with a cylinder sealing plate, the cover plate is sealed and matched with the other end of the cylinder, and the filter plate and the cylinder sealing plate form a filter water chamber. The water separated from the sludge passes through the filter plate into the filter water chamber, and then is discharged from the filter water chamber, so as to realize 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 driving mechanism; the driving mechanism drives the filter plate to rotate and move linearly in the dehydration cylinder through the filter press rod, thereby achieving sludge filtration and crushing of mud blocks after dehydration.

[0010] The cylindrical sealing plate is provided with a first fixed card seat, the cover plate is provided with a second fixed card seat, and the first fixed card seat is connected to the second fixed card seat through a telescopic driving member. The telescopic driving member can adjust the spacing between the first fixed card seat and the second fixed card seat, thereby realizing the relative position adjustment of the cover plate and the dewatering cylinder. Specifically, when the sludge is pressed, the cover plate is tightly fitted with the dewatering cylinder, and when the mud blocks are discharged, the cover plate is away from the dewatering cylinder, and the mud blocks are discharged from the gap between the cover plate and the dewatering cylinder, which is convenient for the continuous dehydration work of the dehydration device.

[0011] The side wall of the cylinder is provided with a water outlet, which is connected to the filter water chamber; the cover plate is provided with a feed inlet, which is connected to the sludge chamber. The feed inlet is arranged at the center of the cover plate, and the sludge enters the sludge chamber through the feed inlet.

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

[0013] A dewatering method using the sludge dewatering device includes a sludge filtration process, a mud block stirring or crushing process, and a mud block discharge process; during the sludge filtration process, the dewatering cylinder contacts the cover plate, the filter plate moves close to the cover plate, the filter plate presses the sludge in the sludge chamber, the water in the sludge passes through the filter plate into the filter water chamber, and the sludge forms mud blocks after dehydration; during the mud block crushing process, the dewatering cylinder contacts the cover plate, the filter plate moves away from the cover plate, and the mud block crushing component stirs or tears and crushes the mud blocks. The mud blocks after filtration are torn and crushed by the mud block crushing component, so that the mud blocks are in a loose state in the sludge chamber, which is convenient for mud block cleaning.

[0014] During the sludge filtration process, the filter plate moves close to the cover plate and rotates at the same time, the filter plate drives the pull rope to contract and twist, and the pull rope is wrapped by the dehydrated mud; during the mud agitation or crushing process, the filter plate moves away from the cover plate and rotates at the same time, the filter plate pulls the pull rope to straighten, and the pull rope stirs or cuts and crushes the mud; the rotation direction of the filter plate when it is close to the cover plate is opposite to the rotation direction of the filter plate when it is away from the cover plate. The flexible deformation characteristics of the pull rope are used to wrap the sludge during filtration, and the rotation of the filter plate can drive the pull rope to be in an irregular bending state in the mud, and the pull rope can cut the mud after it is straightened to achieve mud crushing.

[0015] During the mud block discharge process, the cover plate is separated from the dewatering cylinder, and the filter plate moves close to the cover plate. The filter plate moves to push the mud blocks out of the dewatering cylinder, so that the mud blocks are discharged from the gap between the cover plate and the dewatering cylinder. After the sludge dewatering is completed, the mud blocks can be discharged by opening the cover plate to clean the mud blocks in the sludge chamber, so that the dewatering device can completely realize the whole process of sludge injection, dehydration and discharge, so that the dewatering device can work continuously and improve the sludge dewatering efficiency.

[0016] The beneficial effects of the present invention are as follows: 1. After the sludge is dehydrated in the sludge chamber, the dehydrated sludge is broken by the sludge block breaking component to keep the sludge blocks loose, thereby preventing the sludge blocks from adhering to the inner wall of the sludge chamber and facilitating the cleaning of the sludge blocks.

[0017] 2. After the cover plate is separated from the dewatering cylinder, the crushed mud blocks can be pushed out of the dewatering cylinder through the movement of the filter plate, thereby realizing the discharge of the dehydrated mud blocks, so that the sludge dewatering device can completely realize the whole process of sludge injection, dehydration and discharge, so that the dewatering device can carry out continuous sludge dewatering work and improve the sludge dewatering efficiency.

[0018] 3. After a certain amount of sludge is injected into the sludge chamber, the filter plate can be rotated and linearly moved multiple times in the dewatering cylinder to make the sludge injected into the sludge chamber undergo multiple dehydration and crushing processes, so that the sludge can be fully dehydrated and the dehydration rate can be improved; and the dehydration rate can be controlled to meet the requirements of different working conditions of tunnel construction.

[0019] 4. The dehydration device adopts a cylindrical structure, and the filter press assembly is arranged inside the cylinder, so that the dehydration device has a compact structure, can adapt to the narrow space area restrictions inside the tunnel, reduce transportation costs, and improve pollution cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0022] In the figure: 1, dehydration cylinder, 11, cylinder, 12, cylinder sealing plate, 13, water outlet, 14, first fixed base, 2, filter press assembly, 21, cover plate, 22, filter press rod, 23, pull rope, 24, feed inlet, 25, second fixed base, 26, pull rope fixing bolt, 221, filter plate, 3, telescopic cylinder, 4, sludge chamber, 5, filtered water chamber. DETAILED DESCRIPTION

[0023] 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.

[0024] Embodiment 1, as Figure 1 , Figure 3 As shown, a sludge dewatering device includes a dewatering cylinder 1, a cover plate 21 is movably connected to the dewatering cylinder 1, the cover plate 21 corresponds to the opening position of the dewatering cylinder 1, and a filter press assembly 2 is arranged in the dewatering cylinder 1; the filter press assembly 2 includes a filter plate 221 movably arranged inside the dewatering cylinder 1, the filter plate 221 and the cover plate 21 form a sludge chamber 4, and a mud block crushing assembly is arranged in the sludge chamber 4. After the sludge is passed into the sludge chamber 4, the filter plate 221 moves in the dewatering cylinder 1 to change the volume of the sludge chamber 4, so as to achieve dewatering of the sludge in the sludge chamber 4, and the mud blocks formed after the sludge is dehydrated are torn and crushed by the mud block crushing assembly to loosen the mud blocks, so as to facilitate the cleaning of the mud blocks in the sludge chamber 4; when the mud blocks in the sludge chamber 4 are full, the cover plate 21 is opened to discharge the mud blocks in the sludge chamber 4, so that the dewatering device can perform continuous sludge dewatering work and improve the sludge dewatering efficiency.

[0025] Further, if Figure 3 , Figure 5 As shown, the mud block 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 of the pull rope 23 is connected to the filter plate 221, and the filter plate 221 performs rotation and linear motion in the dewatering cylinder 1. In this embodiment, the number of the pull ropes 23 is four. When the pull ropes 23 are in a straightened state, the four pull ropes 23 are centrally symmetrically arranged with the rotation axis of the filter plate 221 as the center. The cover plate 21 and the filter plate 221 are both provided with a pull rope fixing bolt 26, and the end of the pull rope 23 is sleeved on the pull rope fixing bolt 26. A nut is connected to the pull rope fixing bolt 26. The nut is tightened to fix the end of the pull rope 23, thereby achieving the fixation of the pull rope 23 in the sludge chamber 4. When the filter plate 221 approaches the cover plate 21 through rotation and linear motion, the pull rope 23 bends and twists, and the dehydrated sludge will wrap the pull rope 23. When 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 of the pull rope 23, the pull rope 23 cuts and breaks the mud blocks, keeping the mud blocks in a loose state, which is convenient for multiple sludge dehydration operations and subsequent mud block discharge operations.

[0026] Further, if Figure 2 As shown, the dehydration cylinder 1 includes a cylinder 11, one end of the cylinder 11 is provided with a cylinder sealing plate 12, the cover plate 21 is sealed and matched with the other end of the cylinder 11, and the filter plate 221 and the cylinder sealing plate 12 form a filter water chamber 5. An annular sealing ring is provided between the end surface 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 to ensure the overall sealing of the sludge chamber 4, thereby preventing water in the sludge from leaking from the gap between the cylinder 11 and the cover plate 21.

[0027] Further, 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 the filter press rod 22 is connected to the drive mechanism through the cylindrical sealing plate 12. 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 the drive motor 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 in parallel with the filter press rod 22, and the telescopic hydraulic cylinder is connected to the drive motor. The telescopic movement of the telescopic hydraulic cylinder can drive the drive motor to move linearly, and then drive the filter press rod 22 to move linearly. The cooperation of the telescopic hydraulic cylinder and the drive motor can drive the filter press rod 22 to rotate and move linearly synchronously, and then drive the filter plate 221 to rotate and move linearly.

[0028] Embodiment 2 is different from Embodiment 1 in that it is a sludge dewatering device, the mud block crushing assembly includes a plurality of elastic rods, one end of the elastic rods is connected to the filter plate 221, and the other end of the elastic rods is connected to the cover plate 21, and the filter plate 221 performs linear motion in the dewatering cylinder 1. The filter press assembly 2 also includes a filter press rod 22, the filter press rod 22 is connected to the filter plate 221, and the filter press rod 22 passes through the cylindrical sealing plate 12 and is connected to the driving mechanism. In this embodiment, the number of the elastic rods is 6, and the 6 elastic rods are arranged in a centrally symmetrical manner. When the filter plate 221 approaches the cover plate 21 through linear motion, the filter plate 221 and the cover plate 21 are compressed together with the elastic rods, causing the elastic rods to bend and deform. At the same time, the filter plate 221 filters the sludge in the sludge chamber 4, and the bent elastic rods will be wrapped by the dehydrated sludge. When the filter plate 221 is away from the cover plate 21, the elastic rods change from a bent state to a straightened state. During the deformation process, the elastic rods cut and crush the mud blocks, making the mud blocks in a loose state, which is convenient for multiple sludge dehydration operations and subsequent mud block discharge operations.

[0029] In addition, in the present embodiment, the filter press rod 22 is fixedly connected to the filter plate 221; the driving mechanism comprises a telescopic hydraulic cylinder, which is arranged in parallel with the filter press rod 22 and connected to the filter press rod 22. The telescopic hydraulic cylinder can drive the filter press rod 22 to perform linear motion, thereby driving the filter plate 221 to perform linear motion.

[0030] Embodiment 3 is different from Embodiment 1 in that it is a sludge dewatering device, the filter press assembly 2 also includes a filter press rod 22, the filter press rod 22 is connected to the filter plate 221, and the filter press rod 22 passes through the cylindrical sealing plate 12 and is connected to the driving mechanism. In this embodiment, the filter press rod 22 is a screw, one end of the filter press rod 22 is fixedly connected to the filter plate 221, a nut is provided on the cylindrical sealing plate 12, and the screw and the nut are threadedly matched; the driving mechanism includes a telescopic hydraulic cylinder, the telescopic hydraulic cylinder is arranged in parallel with the filter press rod 22, the telescopic hydraulic cylinder is rotatably connected to the other end of the filter press rod 22, and the telescopic movement 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 of the screw and the nut, the filter press rod 22 rotates, and at this time, the filter press rod 22 can drive the filter plate 221 to rotate and perform linear motion.

[0031] Embodiment 4 differs from Embodiment 1 in that it is a sludge dewatering device, wherein a spiral groove is provided on the inner wall of the cylinder 11, and a slider is provided at the edge of the filter plate 221, and the slider is slidably matched with the spiral groove. The filter press assembly 2 also includes a filter press rod 22, and the filter press rod 22 is rotatably connected to the filter plate 221. The filter press rod 22 passes through the cylinder sealing plate 12 and is connected to the 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 perform a linear motion, and then the filter press rod 22 drives the filter plate 221 to perform a linear motion in the dewatering cylinder 1, and due to the cooperation of the spiral groove and the slider, the filter plate 221 can rotate while performing a linear motion.

[0032] Embodiment 5, based on embodiment 1, a sludge dewatering device, a first fixed card seat 14 is provided on the cylinder sealing plate 12, a second fixed card seat 25 is provided on the cover plate 21, and the first fixed card seat 14 is connected to the second fixed card seat 25 through a telescopic drive member. In this embodiment, the telescopic drive member is a telescopic oil cylinder 3, the number of which is three, and the telescopic oil cylinder 3 is evenly arranged on the outside of the cylinder 11. When the telescopic oil cylinder 3 is extended and retracted, the spacing between the cover plate 21 and the cylinder sealing plate 12 can be adjusted, thereby realizing the contact or separation of the cover plate 21 and the opening of the dewatering cylinder 1. Specifically, when the dewatering process is being carried out, the cover plate 21 is in contact with the opening of the dewatering cylinder 1, and when the mud block discharge process is being carried out, the cover plate 21 is separated from the opening of the dewatering cylinder 1, so that the mud blocks can 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, and the water outlet 13 is connected to the filtered water chamber 5; a feed port 24 is provided on the cover plate 21, and the feed port 24 is connected to the sludge chamber 4. The water in the sludge passes through the filter plate 221, and then is discharged from the water outlet 13, and the discharged water can be reused. In this embodiment, the feed port 24 is set in the middle position of the cover plate 21, and the sludge enters the sludge chamber 4 through the feed port 24. A valve is provided at the feed port 24. After a certain amount of sludge is injected into the sludge chamber 4, the valve is closed to keep the sludge chamber 4 closed. At this time, the filter plate 221 in the dehydration cylinder 1 moves to achieve pressure filtration and dehydration of the sludge in the sludge chamber 4.

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

[0035] Embodiment 6, on the basis of Embodiment 1, a dewatering method using the sludge dewatering device includes a sludge filter pressing process, a mud block crushing process and a mud block discharging process; during the sludge filter pressing process, the dewatering cylinder 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 into the filter water chamber 5, and the sludge is dehydrated to form mud blocks; during the mud 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 mud block crushing assembly tears and crushes the mud blocks. The filter plate 221 can realize the sludge filtration process and the mud block crushing process by performing a reciprocating motion in the dehydration cylinder 1. Specifically, when the filter plate 221 moves close to the cover plate 21, the filter plate 221 dehydrates and filters the sludge in the sludge chamber 4. When the filter plate 221 moves away from the cover plate 21, the mud block crushing component tears and crushes the mud blocks after filtration, so that the mud blocks are in a loose state in the sludge chamber, thereby realizing the sludge filtration process and the mud block 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 perform the sludge filtration process and the mud block crushing process, and then performs the mud block discharge process, thereby achieving continuous sludge dehydration and improving sludge dehydration efficiency.

[0037] Embodiment 7, on the basis of Embodiment 6, a dewatering method using the sludge dewatering device, during the sludge filtration process, the filter plate 221 moves close to the cover plate 21 and the filter plate 221 rotates, the filter plate 221 drives the pull rope 23 to contract and twist, and the pull rope 23 is wrapped by the dehydrated mud blocks; during the mud block crushing process, the filter plate 221 moves away from the cover plate 21 and the filter plate 221 rotates, the filter plate 221 pulls the pull rope 23 to straighten, and the pull rope 23 cuts and crushes the mud blocks; the rotation direction of the filter plate 221 when it is close to the cover plate 21 is opposite to the rotation direction of the filter plate 221 when it is away from the cover plate 21. By utilizing the flexible deformation characteristics of the pull rope 23, the sludge can be wrapped during filtration, and because the filter plate 221 rotates while performing linear motion, the filter plate 221 can drive the pull rope 23 to bend and twist, thereby causing the pull rope 23 to be wrapped by the mud blocks in a bent state; when the filter plate 221 moves in the opposite direction, the pull rope 23 is pulled to straighten, and the pull rope 23 cuts the mud blocks to achieve the crushing of the mud blocks.

[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 perform the sludge filtration process and the mud block crushing process, and then performs the mud block discharge process; in the above process, the sludge entering the sludge chamber 4 is repeatedly subjected to multiple pressure filtration and dehydration, which can effectively improve the dehydration rate of the sludge and realize the control of the dehydration rate; in addition, during the mud block crushing process, the pull rope 23 also has the function of stirring the dehydrated sludge, so that the filter plate 221 can better discharge the water in the sludge during the next pressure filtration and dehydration.

[0039] Embodiment 8, based on embodiment 6 or embodiment 7, a dewatering method using the sludge dewatering device, such as Figure 6 As shown, during the mud block discharging process, the cover plate 21 is separated from the dehydration cylinder 1, and the filter plate 221 moves close to the cover plate 21. The filter plate 221 moves to push the mud blocks out of the dehydration cylinder 1, so that the mud blocks are discharged from the gap between the cover plate 21 and the dehydration cylinder 1. Specifically, after the sludge is pressed and dehydrated, the filter plate 221 is in a position away from the cover plate 21. At this time, the telescopic cylinder 3 between the cover plate 21 and the cylindrical sealing plate 12 is extended, and a gap is generated between the cover plate 21 and the dehydration cylinder 1. At this time, the filter plate 221 moves toward the cover plate 21 in the dehydration cylinder 1, and the filter plate 221 pushes the mud blocks in the dehydration cylinder 1 out of the dehydration cylinder 1, and the dehydrated mud blocks fall from the gap, thereby cleaning the mud blocks in the sludge chamber 4. After the mud blocks are cleaned, the telescopic cylinder 3 contracts, and the cover plate 21 contacts the dehydration cylinder 1 again, so that the sludge chamber 4 is re-closed to prepare for the next sludge dehydration. Through the mud block discharge process, the dehydration device can completely realize the whole process of sludge injection, dehydration and discharge, so that the dehydration device can work continuously and improve the sludge dehydration 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge dewatering device, characterized in that: The invention comprises a dehydration cylinder (1), a cover plate (21) movably connected to the dehydration cylinder (1), the cover plate (21) corresponding to the opening position of the dehydration cylinder (1), and a filter press assembly (2) arranged in the dehydration cylinder (1); the filter press assembly (2) comprises a filter plate (221) movably arranged in the dehydration cylinder (1), the filter plate (221) and the cover plate (21) forming a sludge chamber (4), and a mud block crushing assembly arranged in the sludge chamber (4).

2. The sludge dewatering device according to claim 1, characterized in that: The mud block crushing assembly comprises at least one pull rope (23), one end of the pull rope (23) is connected to the cover plate (21), and the other end of the pull rope (23) is connected to the filter plate (221).

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

4. The sludge dewatering device according to claim 3, characterized in that: The filter press assembly (2) further comprises a filter press rod (22), one end of the filter press rod (22) being connected to the filter plate (221), and the other end of the filter press rod (22) passing through the cylindrical sealing plate (12) and being connected to the driving mechanism.

5. The sludge dewatering device according to claim 1 or 4, characterized in that: A first fixed card seat (14) is provided on the cylindrical sealing plate (12), a second fixed card seat (25) is provided on the cover plate (21), and the first fixed card seat (14) is connected to the second fixed card seat (25) via a telescopic driving member.

6. The sludge dewatering device according to claim 5, characterized in that: A water outlet (13) is provided on the side wall of the cylinder (11), and the water outlet (13) is communicated with the filtration water chamber (5); a feed inlet (24) is provided on the cover plate (21), and the feed inlet (24) is communicated with the sludge chamber (4).

7. The sludge dewatering device according to claim 1 or 6, characterized in that: The filter plate (221) is provided with filter holes, and the filter plate (221) is wrapped with filter cloth.

8. A dewatering method using the sludge dewatering device as described in any one of 1 to 7, characterized in that: It includes the sludge filter pressing process, the mud agitation or crushing process and the mud agglomeration discharge process; During the sludge filtration process, the dewatering cylinder (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), water in the sludge passes through the filter plate (221) and enters the filter water chamber (5), and the sludge is dehydrated to form a mud block; During the mud 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 mud block crushing component stirs or tears the mud blocks for crushing.

9. The dehydration method according to claim 8, characterized in that: During the sludge filtration process, the filter plate (221) moves close to the cover plate (21) and the filter plate (221) rotates, the filter plate (221) drives the pull rope (23) to perform contraction and twisting movements, and the pull rope (23) is wrapped by the dehydrated mud blocks; When the mud is being stirred or crushed, the filter plate (221) moves away from the cover plate (21) and the filter plate (221) rotates, the filter plate (221) pulls the pull rope (23) to straighten, and the pull rope (23) stirs or cuts and crushes the mud; The rotation direction of the filter plate (221) when it approaches the cover plate (21) is opposite to the rotation direction of the filter plate (221) when it moves away from the cover plate (21).

10. The dehydration method according to claim 9, characterized in that: During the mud block discharge process, the cover plate (21) is separated from the dewatering cylinder (1), and the filter plate (221) moves closer to the cover plate (21). The filter plate (221) moves to push the mud blocks out of the dewatering cylinder (1), so that the mud blocks are discharged from the gap between the cover plate (21) and the dewatering cylinder (1).

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