A dewatering device and method

Abstract

This invention discloses a dewatering device and method, belonging to the field of environmental protection technology. It includes a stacked cloth structure, a filter press frame structure, and a filter press structure. The stacked cloth structure includes a conveying mechanism, an upper filter cloth operating mechanism, a feeding mechanism, a lower filter cloth operating mechanism, and a pressing roller. The upper filter cloth operating mechanism includes an upper cloth winding assembly, an upper correction detection assembly, an upper flattening assembly, an upper scraping assembly, and a pressing roller. The lower filter cloth operating mechanism includes a lower cloth winding assembly, a lower correction detection assembly, a first lower flattening assembly, a lower scraping assembly, a second lower flattening assembly, and a traction assembly. The feeding mechanism includes a feed inlet, a support, a feed hopper, a discharge valve, a cloth bucket, a cloth roller, a discharge outlet, and a lifting gate. During cloth winding, both the upper and lower cloth winding assemblies unwind, and the pressing roller, pressing roller, and cloth bucket are all in a low position, causing the stacked cloth structure to reciprocate back and forth. During discharge, both the upper and lower cloth winding assemblies rewind, and the pressing roller, pressing roller, and cloth bucket are in a high position.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection technology, and specifically relates to a dewatering device and method, particularly a dewatering device for sludge dewatering. Background Technology

[0002] Wastewater treatment methods utilize physical, chemical, and biological methods to purify wastewater, reduce pollution, and ultimately achieve wastewater recycling and reuse, making full use of water resources. Urban domestic sewage mainly originates from a range of urban public places and facilities, including households, schools, and businesses. The pollutants in urban domestic sewage are diverse, but in terms of their main content, they are predominantly organic matter, with starch, protein, sugars, mineral oil, and other household waste being the most abundant components.

[0003] Based on the degree of treatment, wastewater treatment (mainly urban domestic sewage and some industrial wastewater) can generally be divided into three levels.

[0004] The primary treatment task is to remove suspended solids from wastewater. Physical treatment methods are commonly used for this purpose. Generally, after primary treatment, the removal rate of suspended solids is 70%-80%, while the removal rate of biochemical oxygen demand (BOD) is only about 25%-40%, resulting in a low level of wastewater purification.

[0005] The task of secondary treatment is to significantly remove organic pollutants from wastewater. Taking BOD as an example, 80%-90% of BOD in wastewater can generally be removed after secondary treatment. For instance, the BOD content in municipal sewage can be below 30 mg / L after treatment. Most treatment units of aerobic biological treatment methods can meet this requirement.

[0006] The task of tertiary treatment is to further remove pollutants that were not removed by secondary treatment, including organic matter, phosphorus, nitrogen and soluble inorganic matter that have not been degraded by microorganisms.

[0007] Wastewater treatment generates a large amount of sludge, which typically has a water content of over 80% and contains a significant amount of organic matter. In current technologies, to effectively treat and utilize sludge for environmental purposes, turning waste into treasure and resources, dewatering the sludge and minimizing its water content is crucial. Mechanical dewatering is one of the most commonly used and fastest dewatering techniques. Common mechanical equipment used for dewatering includes belt filter presses, plate and frame filter presses, screw presses, centrifugal dewatering machines, vacuum suction filters, and multi-layer vertical filter presses.

[0008] For example, patent application number CN202111286939.5 discloses a filter press, including a cloth stacking device, a filter press frame structure, and a filter press device. The filter press frame structure includes a filter press frame that can move between a filter press station and a material preparation station, and a base plate disposed within the filter press frame. The filter press device includes a base, a main oil cylinder, and a pressure plate driven by the main oil cylinder to press the filter cloth located within the filter press frame. The filter cloth includes an upper filter cloth and a lower filter cloth. The cloth stacking device includes: a frame, an upper filter cloth operating mechanism, a lower filter cloth operating mechanism, a sludge discharge mechanism, a sludge separating and pressing mechanism, a pressing roller, and a cloth stacking and feeding mechanism. The lower filter cloth is movably laid on the frame. The sludge discharge mechanism discharges sludge onto the lower filter cloth; the upper filter cloth operating mechanism is mounted on the frame, and includes a first cloth winding mechanism, a first winding and deviation measuring mechanism, and a first filter cloth correction mechanism arranged sequentially. The first cloth winding mechanism includes a winding roller that can move along its own axis and rotate around its own axis. The upper filter cloth is wound around the winding roller of the first cloth winding mechanism. The first winding and deviation measuring mechanism detects whether the upper filter cloth is misaligned. The winding roller of the first cloth winding mechanism adjusts its position by moving along its own axis according to the detection result of the first winding and deviation measuring mechanism. The first filter cloth correction mechanism corrects the deviation of the upper filter cloth. The lower filter cloth operating mechanism... The filter cloth operating mechanism, mounted on the frame, includes a second cloth winding mechanism, a second feeding and correction mechanism, and a second filter cloth correction mechanism arranged sequentially. The second cloth winding mechanism includes a winding roller that can move along its own axial direction and rotate around its own axis. The filter cloth is wound around the winding roller of the second cloth winding mechanism. The second feeding and correction mechanism detects whether the filter cloth is misaligned. The winding roller of the second cloth winding mechanism adjusts its position by moving along its own axial direction according to the detection result of the first feeding and correction mechanism. The second filter cloth correction mechanism corrects the misalignment of the filter cloth. The sludge separating and pressing mechanism is mounted on the frame and located after the sludge discharge mechanism. The structure includes a pressing plate disposed on the frame, the pressing plate having a horizontally arranged pressing part, the length of the pressing plate being at least equal to the width of the lower filter cloth; a pressing roller disposed on the frame and located after the sludge separating and pressing mechanism, the setting height of the pressing roller being adjustable, and the axis of the pressing roller being perpendicular to the moving direction of the lower filter cloth; the upper filter cloth, after passing through the first feeding and measuring mechanism and the first filter cloth correction mechanism, is laid on the lower filter cloth and passes under the pressing roller together with the lower filter cloth; the stacking and feeding mechanism is horizontally movable and disposed on the frame and located at one end of the frame, for transporting sludge bags formed by the upper and lower filter cloths wrapping the sludge.

[0009] In existing technologies, filter cloth stacking is achieved through the back-and-forth movement of the filter press frame assembly. However, during actual use, the applicant discovered that the filter press frame assembly must withstand the pressure of the filter press (approximately 1000 tons), requiring very high strength. This necessitates thicker side walls (including the bottom lifting structure and the filter cloth inside, and the resulting weight variation), leading to significant mass and high energy consumption. Furthermore, the back-and-forth movement of the filter cloth within the frame assembly may cause sludge to be thrown out. Additionally, the feeding of the upper and lower filter cloths requires energy consumption. Summary of the Invention

[0010] To address the aforementioned problems, embodiments of the present invention provide a dehydration device and method that utilizes a stacked fabric structure with back-and-forth movement to achieve layering, resulting in low energy consumption and stable back-and-forth movement. During fabric feeding, the upper and lower fabric winding assemblies do not require operation, further reducing energy consumption and facilitating synchronization. The technical solution is as follows:

[0011] On one hand, embodiments of the present invention provide a dewatering device, including a stacked cloth structure 2, a filter press frame structure 3, and a filter press structure 4. The stacked cloth structure 2 includes a frame 21 arranged in a front-to-back direction, a conveying mechanism 22 arranged in a front-to-back direction at the rear of the frame 21, an upper filter cloth operating mechanism 23 and a feeding mechanism 24 located on the upper part of the frame 21 and above the conveying mechanism 22, a lower filter cloth operating mechanism 25 located at the front of the frame 21, and a pressing roller 26 on the upper side of the rear end of the conveying mechanism 22. The feeding mechanism 24 is located in front of the upper filter cloth operating mechanism 23. The lower filter cloth 5 output by the lower filter cloth operating mechanism 25 is arranged along the upper side of the conveying mechanism 22, and the upper filter cloth 6 output by the upper filter cloth operating mechanism 23 covers the lower filter cloth 5. On the upper side of the filter cloth 5, the pressing roller 26 can move up and down. The upper filter cloth 6, the material to be dewatered, and the lower filter cloth 5 are stacked to form a filter cloth. The frame 21 can move back and forth. When the frame 21 is in the front, the rear end of the conveying mechanism 22 is located above the front side of the filter press frame structure 3. When the frame 21 is in the rear, the rear end of the conveying mechanism 22 is located above the rear side of the filter press frame structure 3. The upper filter cloth operating mechanism 23 includes an upper winding assembly 31, an upper correction detection assembly 32, an upper flattening assembly 33, an upper scraping assembly 34, and a pressing roller 35 arranged sequentially along the upper filter cloth 6. The upper winding assembly 31 can be adjusted left and right according to the detection result of the upper correction detection assembly 32. The upper flattening component 33 is located in front of the upper winding component 31, and the upper scraping component 34 is located in front of and above the pressure roller 35. The pressure roller 35 is arranged in the left-right direction, pressing the upper filter cloth 6 against the upper side of the lower filter cloth 5, and it can move up and down. The lower filter cloth operating mechanism 25 includes a lower winding component 51, a lower correction detection component 52, a first lower flattening component 53, a lower scraping component 54, a second lower flattening component 55, and a traction component 56 arranged sequentially along the lower filter cloth 5. The lower winding component 51 can be adjusted left and right according to the detection result of the lower correction detection component 52. The lower scraping component 54 is located at the front end of the frame 21. The lower winding component 51, the lower correction detection component 52, and the first lower flattening component 53 are connected in sequence. The lower flattening components 53 are all located below the lower filter cloth 5 and are arranged sequentially from back to front. The lower scraping component 54, the second lower flattening component 55, the traction component 56 and the conveying mechanism 22 are arranged sequentially from front to back and are flush. The feeding mechanism 24 includes a feeding port 41, a support 42 on the frame 21, a feeding hopper 43 at the top of the support 42, a discharge valve at the bottom of the feeding hopper 43, a cloth bucket 44 inside the support 42 that can move up and down, a cloth roller 45 inside the cloth bucket 44, a discharge port at the bottom of the rear side of the cloth bucket 44 and a lifting gate on the discharge port that can be adjusted up and down. The feeding port 41 is suspended. When the frame 21 moves back and forth, the feeding hopper 43 is always located directly below the feeding port 41.The fabric hopper 44 is located directly below the feed hopper 43 and adjacent to and above the conveying mechanism 22. The fabric roller 45 is arranged horizontally and located in the lower rear part of the fabric hopper 44. The lifting gate is located above the discharge port and can adjust the height of the discharge port. When the fabric is being laid in the stacked fabric structure 2, both the upper fabric winding assembly 31 and the lower fabric winding assembly 51 are unwound, the bottom plate of the filter press frame structure 3 descends in a step-by-step manner, and the pressing roller 26, the pressing roller 35, and the fabric hopper 44 are all in a low position. The stacked fabric structure 2 reciprocates back and forth to stack the filter cloth in layers within the filter press frame structure 3. When the fabric is being discharged from the stacked fabric structure 2, both the upper fabric winding assembly 31 and the lower fabric winding assembly 51 are wound up at coordinated speeds, the bottom plate rises in a step-by-step manner, and the pressing roller 26, the pressing roller 35, and the fabric hopper 44 are all in a high position. The stacked fabric structure 2 does not move back and forth.

[0012] In this embodiment of the invention, the filter press frame structure 3 includes a filter press frame, a base plate that can move up and down inside the filter press frame, a stepping lifting assembly that drives the base plate to move up and down, and a transverse hydraulic cylinder that drives the filter press frame to move back and forth. The filter press frame can move between the filter press station and the material preparation station. The filter press station is located directly below the filter press structure 4, and the material preparation station is located directly in front of the filter press station and directly below the rear end of the conveying mechanism 22. The filter press structure 4 includes a base, a pressure plate, and a main hydraulic cylinder for driving the pressure plate to move up and down. When the filter press frame is located at the filter press station, the pressure plate is located inside the filter press frame and presses against the top of the stacked filter cloth.

[0013] In this embodiment of the invention, the conveying mechanism 22 is a chain conveyor, with drive shafts at both its front and rear ends. The front drive shaft is located in the middle of the frame 21, and the rear drive shaft is located at the rear end of the frame 21 and is connected to the corresponding conveying drive motor. The bottom of the frame 21 is slidably mounted on a longitudinal slide rail 8, which is arranged along the front-rear direction. The overlapping fabric structure 2 also includes a reciprocating drive mechanism, which is located on the left or right side of the frame 21 and opposite to the conveying drive motor. The reciprocating drive mechanism includes a vertically arranged column 81, a walking track wheel 82 on the column 81 that can move up and down, a rear track wheel coaxially arranged at the end of the rear drive shaft, and the left or right side of the frame 21. The frame 21 comprises a front track wheel, a track 83 arranged in the front-rear direction, and a lifting drive assembly for driving the walking track wheel 82 to move up and down. The front track wheel is located directly in front of the rear track wheel, and the front and rear ends of the track 83 are respectively wrapped around the front and rear track wheels. The walking track wheel 82 is arranged in the left-right direction and is located on the side of the column 81 near the frame 21, between the upper and lower tracks of the track 83. When the walking track wheel 82 is in a high position, it engages with the lower side of the upper track; when the walking track wheel 82 is in a low position, it engages with the upper side of the lower track. The reciprocating movement of the frame 21 in the front-rear direction is achieved by the up-and-down movement of the walking track wheel 82.

[0014] In this embodiment of the invention, the upper winding assembly 31 includes a mounting base, a transverse slide rail arranged along the left and right directions on the mounting base, a slide block slidably disposed on the transverse slide rail, a servo motor between the mounting base and the slide block for driving the slide block to move left and right, a swing arm at the rear of the slide block, a winding shaft at the upper end of the swing arm, a tension controller on the swing arm and located at the end of the winding shaft, a fixed arm at the front of the slide block, an active roller at the upper part of the fixed arm, a pressure roller at the upper end of the fixed arm that can move up and down, and an upper winding cylinder for driving the swing arm to rotate forward. The mounting base is disposed on the frame 21, and the servo motor can adjust the rotation based on the detection results of the upper correction detection assembly 32. In operation, the swing arm is vertically positioned and its lower end is hinged to the slide block; the pressure roller is located directly above the drive roller; when the fabric is being stacked in the fabric structure 2, the swing arm is vertically positioned, the upper filter cloth roll is located behind the drive roller, and the pressure roller rises to move away from the drive roller; when the fabric is being discharged from the fabric structure 2, the swing arm rotates forward, the upper filter cloth roll rests against the rear side of the drive roller, and the pressure roller presses the upper filter cloth 6 against the top of the drive roller; the lower roll assembly 51 reduces the pressure roller relative to the upper roll assembly 31; the mounting base of the upper roll assembly 31 is located above the filter cloth; the mounting base of the lower roll assembly 51 is located at the bottom of the frame 21.

[0015] Specifically, in this embodiment of the invention, the upper filter cloth 6 moves obliquely forward and downward to the upper flattening assembly 33 and passes through the upper correction detection assembly 32, then moves obliquely forward and downward to the upper scraping assembly 34, and then moves obliquely backward and downward to the conveying mechanism 22 and to the front side of the pressure roller 35; the lower filter cloth 5 moves forward to the first lower flattening assembly 53 and passes through the lower correction detection assembly 52, then moves obliquely forward and upward to the lower scraping assembly 54, and then moves backward sequentially to the second lower flattening assembly 55, the traction assembly 56 and the conveying mechanism 22.

[0016] In this embodiment of the invention, the upper flattening assembly 33 includes an upper drive motor, an upper drive chain, an upper drive sprocket, and two upper flattening rollers. The two upper flattening rollers are arranged side by side, with a sprocket coaxially mounted at the same end. The upper drive motor is connected to the rear upper flattening roller. The upper drive sprocket is located directly in front of the sprocket on the front upper flattening roller. The rear end of the upper drive chain is wound around the sprocket of the rear upper flattening roller, the front end is wound around the upper drive sprocket, and the lower part of the chain is wound around the upper side of the sprocket of the front upper flattening roller. The upper filter cloth 6 is obliquely forward and downward to the lower side of the rear upper flattening roller, then obliquely forward and upward to the upper side of the front upper flattening roller, and then obliquely forward and downward to the upper scraping assembly 34. The first lower flattening assembly 53 includes two first lower flattening rollers arranged side by side. The second lower flattening assembly 55 includes a second lower flattening roller, a lower drive motor, a lower drive sprocket, a tension sprocket, and two lower drive chains. The lower filter cloth 5... The chain extends forward to the upper side of the second lower flattening roller, then forward and downward to the lower side of the second lower flattening roller in front, then diagonally forward and upward to the lower scraping assembly 54, then backward to the upper side of the second lower flattening roller, and then backward to the traction assembly 56. The lower drive motor is connected to the second lower flattening roller. The end of the first lower flattening roller is coaxially provided with a sprocket, and the corresponding ends of the second lower flattening roller are provided with two sprockets side by side. The lower drive sprocket is located below the first lower flattening roller in the rear, and the tension sprocket is located between the second lower flattening roller and the first lower flattening roller in front. The upper end of one lower drive chain is wrapped around one sprocket of the second lower flattening roller, and its lower end is wrapped around the lower drive sprocket. The rear side of its middle part is wrapped around the front side of the sprocket on the first lower flattening roller in the rear. The upper end of another lower drive chain is wrapped around another sprocket of the second lower flattening roller, and its lower end is wrapped around the sprocket on the first lower flattening roller in front. The front side of its middle part is wrapped around the rear side of the tension chain.

[0017] In this embodiment of the invention, the upper scraping assembly 34 includes an upper scraping roller, an upper scraping shaft located above and in front of the upper scraping roller, an upper scraper on the upper scraping shaft, an upper swing arm at the end of the upper scraping shaft, and a tension spring between the upper end of the upper swing arm and the frame 21. The upper scraping roller is located between the upper flattening roller and the pressing roller 35 in front, positioned below and in front of the upper flattening roller and above and in front of the pressing roller 35. The upper filter cloth 6 passes around the front side of the upper scraping roller, and the upper scraping shaft is rotatably mounted on the frame 21. The upper scraper is arranged obliquely from top to bottom and rearward, with its upper end fixed to the upper scraping shaft and its lower end abutting against the front side of the upper scraping roller. The upper swing arm is located above the upper scraping shaft. The tension spring is located in front of the upper swing arm and is connected to the upper end of the upper swing arm, used to allow the upper scraper to move towards the upper scraper. The lower scraping assembly 54 includes a lower scraping roller, a lower scraping shaft below the lower scraping roller, a lower scraper on the lower scraping shaft, a lower swing arm at the end of the lower scraping shaft, and a scraping cylinder between the lower end of the lower swing arm and the frame 21. The lower scraping roller is located at the front end of the frame 21, directly in front of the second lower flattening roller and above the front of the first lower flattening roller. The lower scraping shaft is rotatably mounted on the frame 21. The lower scraper is arranged obliquely backward from bottom to top, with its lower end fixed to the lower scraping shaft and its upper end abutting against the lower front side of the lower scraping roller. The lower swing arm is located below the lower scraping shaft. The scraping cylinder is arranged in the front-rear direction, located behind the lower swing arm, with the front end of its telescopic rod hinged to the lower end of the lower swing arm, and its extension is used to drive the lower scraper to rotate backward.

[0018] Furthermore, in this embodiment of the invention, the frame 21 is provided with a fixed frame 7, which is located above the filter cloth; the upper flattening component 33 is located at the top of the fixed frame 7, the upper scraping component 34 is located in the middle of the fixed frame 7, and the pressing roller 35 is located at the lower rear part of the fixed frame 7 and is adjustable up and down on the fixed frame 7.

[0019] In this embodiment of the invention, the feeding hopper 43 is a flat hopper arranged along the front-to-back direction and wider at the top than at the bottom; the material distribution hopper 44 is rectangular and vertically arranged; the support 42 is a rectangular frame structure; four lifting cylinders are respectively provided at the four corners of the top of the support 42; the lifting cylinders are arranged vertically downward, and the lower end of their telescopic rods is fixedly connected to the top of the material distribution hopper 44; the four lifting cylinders are driven synchronously; the top of the support 42 is provided with a drive motor, which is connected to the material distribution roller 45 through a chain; the mud pressing roller 26 and the cloth pressing roller 35 are both driven up and down by corresponding cylinders, and the corresponding cylinders are driven synchronously with the lifting cylinders.

[0020] On the other hand, embodiments of the present invention also provide a dehydration method using the aforementioned dehydration apparatus, the method comprising:

[0021] When the filter cloth is laid in the stacked structure 2, the filter press frame is located in the material preparation position, the feeding mechanism 24 feeds the material, the upper roll cloth assembly 31 and the lower roll cloth assembly 51 both unwind, the bottom plate of the filter press frame structure 3 descends step by step, the mud pressing roller 26, the cloth pressing roller 35 and the material bucket 44 are all in the low position, the swing arm is set vertically, the pressure roller is in the high position, the scraper cylinder retracts, the active roller does not work, and the stacked structure 2 reciprocates back and forth to stack the filter cloth in the filter press frame structure 3.

[0022] During filter cloth filtration, the filter press frame is located at the filter press station, and the pressure plate of the filter press structure 4 moves downward into the filter press frame and presses against the top of the stacked filter cloth to achieve filtration.

[0023] When the stacked fabric structure 2 is discharging material, the filter press frame is located at the material preparation station, the upper fabric roll assembly 31 and the lower fabric roll assembly 51 are both rolled up and their speeds are coordinated, the bottom plate rises in a step-by-step manner, the mud pressing roller 26, the fabric pressing roller 35 and the fabric bucket 44 are all located at high positions, the swing arm is set obliquely forward, the pressure roller is located at a low position, the scraper cylinder extends, the active roller works, the stacked fabric structure 2 does not move back and forth, and the walking track wheel 82 does not mesh with the upper track and the lower track.

[0024] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0025] (1) The stacking structure is used to achieve stacking by moving back and forth, which has low energy consumption and stable back and forth movement. The filter cloth in the filter press frame does not move, which also facilitates the stepping movement of the bottom plate.

[0026] (2) When the cloth is being laid, the upper and lower cloth winding assemblies do not need to work (they move synchronously with the conveying mechanism to ensure the stability and neatness of the upper and lower filter cloth stacks), thus reducing energy consumption; the filter cloth is conveyed backward by the conveying mechanism, which drives the stacked cloth structure to move back and forth, resulting in good synchronization.

[0027] (3) A special flattening structure is set up to ensure that the lower and upper filter cloths are always flat during the feeding and discharging of materials, thus ensuring the filter pressing effect;

[0028] (4) A reciprocating drive mechanism with a special structure is set up to drive the stacked fabric structure to move forward and backward through the conveying mechanism. The conveying mechanism does not need to change direction, but only needs to move the track wheels up and down to achieve switching.

[0029] (5) High efficiency and large processing capacity, up to 240 tons / day (up to 280 tons / day), which is more than 5% higher than the existing structure;

[0030] (6) Different structures of upper scraping assembly and lower scraping assembly were adopted to achieve material discharge and ensure the cleanliness of the filter belt;

[0031] (7) The upper and lower roll-up components are driven by active rollers to roll up the filter cloth, which can ensure a constant speed.

[0032] (8) When feeding, the feeding bucket should be as close as possible to the lower filter cloth so that the sludge flows out from the outlet to the back to ensure the feeding effect; when discharging, the feeding bucket should be raised so that the lower filter cloth and the sludge that has been pressed and filtered on it can pass through. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the dehydration device in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the overlapping fabric structure;

[0035] Figure 3 This is a top view of the overlay structure;

[0036] Figure 4 yes Figure 3 A magnified view of the upper and middle fabric roll assembly;

[0037] Figure 5 yes Figure 3 A magnified view of a portion of the feed mechanism.

[0038] In the diagram: 1. Base, 2. Stacked cloth structure, 3. Filter press frame structure, 4. Filter press structure, 5. Lower filter cloth, 6. Upper filter cloth, 7. Fixed frame, 8. Longitudinal slide rail;

[0039] 21 Frame, 22 Conveying mechanism, 23 Upper filter cloth operating mechanism, 24 Feeding mechanism, 25 Lower filter cloth operating mechanism, 26 Sludge pressing roller;

[0040] 31 Upper fabric winding assembly, 32 Upper deviation correction and detection assembly, 33 Upper flattening assembly, 34 Upper scraping assembly, 35 Pressing roller;

[0041] 41 Feed inlet, 42 Support frame, 43 Feed hopper, 44 Fabric bucket, 45 Fabric roller;

[0042] 51 Lower fabric winding assembly, 52 Lower deviation correction detection assembly, 53 First lower flattening assembly, 54 Lower scraping assembly, 55 Second lower flattening assembly, 56 Traction assembly;

[0043] 81. Column, 82. Track wheel, 83. Track. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Example 1

[0046] See Figure 1-5Example 1 provides a dewatering device, including a base 1, a stacked fabric structure 2, a filter press frame structure 3, and a filter press structure 4. The base 1 is arranged in the front-to-back direction and is a frame structure. The stacked fabric structure 2, the filter press frame structure 3, and the filter press structure 4 are arranged sequentially on the base 1 from front to back. The filter press frame structure 3 includes a filter press frame, a base plate, a stepping lifting assembly, and a horizontal hydraulic cylinder. The filter press frame is vertically arranged and is a rectangular frame arranged in the front-to-back direction. It can move between the filter press station and the material preparation station (front-to-back movement). The base plate is located inside the filter press frame and cooperates with the filter press frame. It can move up and down and is arranged horizontally. The stepping lifting assembly is used to drive the base plate to move up and down (stepping motion), and it can specifically be a screw lifting structure. The horizontal hydraulic cylinder is used to drive the filter press frame to move back and forth. Specifically, the horizontal hydraulic cylinder is arranged in the front-to-back direction and is located between the front side of the filter press frame and the base 1. The filter press station is located directly below the filter press structure 4, and the material preparation station is located directly in front of the filter press station and directly below the rear end of the conveying mechanism 22. The filter press structure 4 includes a base, a pressure plate, and a main hydraulic cylinder, etc. The base is a gantry structure. The pressure plate is horizontally positioned and cooperates with the filter press frame. The main hydraulic cylinder is used to drive the pressure plate to move up and down, and it is vertically positioned. When the filter press frame is in the filter press station, the pressure plate is located inside the filter press frame and presses against the top of the stacked filter cloth to achieve filter pressing.

[0047] The overlapping fabric structure 2 includes a frame 21, a conveying mechanism 22, an upper filter cloth operating mechanism 23, a feeding mechanism 24, a lower filter cloth operating mechanism 25, a pressing roller 26, and a reciprocating drive mechanism. The frame 21 is arranged in the front-to-back direction, with its bottom slidably mounted on a longitudinal slide rail 8, allowing for reciprocating movement in the front-to-back direction. A fixing structure (such as a vertically downward-facing pneumatic pin) can be installed at its bottom. The longitudinal slide rail 8 is arranged in the front-to-back direction and is located at the top of the base 1. The reciprocating drive mechanism drives the frame 21 to reciprocate in the front-to-back direction. The conveying mechanism 22 is arranged in the front-to-back direction and is located at the rear of the frame 21. It is a chain conveyor, etc., and has drive shafts at both its front and rear ends (arranged in the left-to-right direction). The front drive shaft is located in the middle of the frame 21, and the rear drive shaft is located at the rear of the frame 21 and is connected to the corresponding conveyor drive motor. The upper filter cloth operating mechanism 23 is located on the upper part of the frame 21 and above the conveying mechanism 22. It is used for unwinding and rewinding the upper filter cloth 6, and the output upper filter cloth 6 covers the upper side of the lower filter cloth 5. The feeding mechanism 24 is located on the upper part of the frame 21 and above the conveying mechanism 22. It is used for outputting material and is located in front of the upper filter cloth operating mechanism 23. The lower filter cloth operating mechanism 25 is located at the front of the frame 21. It is used for unwinding and rewinding the lower filter cloth 5, and the output lower filter cloth 5 is arranged along the upper side of the conveying mechanism 22. The pressing roller 26 is located on the upper side of the rear end of the conveying mechanism 22. It is arranged in the left-right direction and can move up and down. When the frame 21 is in the front position, the rear end of the conveying mechanism 22 is located above the front side of the filter press frame structure 3. When the frame 21 is in the rear position, the rear end of the conveying mechanism 22 is located above the rear side of the filter press frame structure 3.

[0048] The reciprocating drive mechanism is located on the left or right side of the frame 21, opposite the conveyor drive motor. The reciprocating drive mechanism includes a column 81, a traveling track wheel 82, a rear track wheel, a front track wheel, a track 83, and a lifting drive assembly. The column 81 is vertically positioned on the left or right side of the frame 21, with its lower end fixed to the top of the base 1. The traveling track wheel 82 is mounted on the column 81, arranged horizontally, and can move vertically. It is located on the side of the column 81 closest to the frame 21, between the upper and lower tracks of the track 83. The rear and front track wheels are located on the same side of the frame 21 and are both arranged horizontally. The rear track wheel is coaxially mounted at the end (left or right) of the rear drive shaft. The front track wheel is located on the left or right side of the frame 21, directly in front of the rear track wheel. The track 83 is arranged in a front-to-back direction, with its front and rear ends wrapped around the front and rear track wheels, respectively. A lifting drive assembly is used to drive the walking track wheels 82 to move up and down; it is a conventional structure, but can specifically be a servo lifting structure. When the walking track wheels 82 are in a high position, they engage with the lower side of the upper track. When the walking track wheels 82 are in a low position, they engage with the upper side of the lower track. The up-and-down movement of the walking track wheels 82 achieves the front-to-back reciprocating motion of the frame 21. When the frame 21 is not moving back and forth and the conveyor mechanism 22 is running, the walking track wheels 82 are not engaged with either the upper or lower track.

[0049] The upper filter cloth operating mechanism 23 includes an upper roll assembly 31, an upper correction detection assembly 32, an upper flattening assembly 33, an upper scraper assembly 34, and a pressure roller 35, arranged sequentially along the upper filter cloth 6. The upper roll assembly 31 can adjust left and right according to the detection result of the upper correction detection assembly 32 to achieve correction. The upper flattening assembly 33 is located in front of the upper roll assembly 31, and the upper scraper assembly 34 is located above and in front of the pressure roller 35 and below the upper flattening assembly 33. The pressure roller 35 is arranged in the left and right direction, pressing the upper filter cloth 6 against the upper side of the lower filter cloth 5, and it can move up and down.

[0050] The lower filter cloth operating mechanism 25 includes a lower roll assembly 51, a lower correction detection assembly 52, a first lower flattening assembly 53, a lower scraper assembly 54, a second lower flattening assembly 55, and a traction assembly 56 arranged sequentially along the lower filter cloth 5. The lower roll assembly 51 can adjust left and right according to the detection result of the lower correction detection assembly 52 to achieve correction. The lower scraper assembly 54 is located at the front end of the frame 21 to achieve material discharge. The lower roll assembly 51, the lower correction detection assembly 52, and the first lower flattening assembly 53 are all located below the lower filter cloth 5 and are arranged sequentially from back to front. The lower scraper assembly 54, the second lower flattening assembly 55, the traction assembly 56, and the conveying mechanism 22 are arranged sequentially from front to back and are flush. The upper correction detection assembly 32 and the lower correction detection assembly 52 are used for correction detection.

[0051] The upper filter cloth 6 moves diagonally forward and downward to the upper flattening assembly 33 and passes through the upper correction detection assembly 32, then diagonally forward and downward to the upper scraping assembly 34, and then diagonally backward and downward to the conveying mechanism 22 and to the front side of the pressure roller 35. The lower filter cloth 5 moves forward to the first lower flattening assembly 53 and passes through the lower correction detection assembly 52, then diagonally forward and upward to the lower scraping assembly 54, and then backward sequentially to the second lower flattening assembly 55, the traction assembly 56 and the conveying mechanism 22.

[0052] The feeding mechanism 24 includes a feed inlet 41, a support 42, a feed hopper 43, a discharge valve, a material distribution bin 44, a material distribution roller 45, a discharge outlet, and a lifting gate. The feed inlet 41 is suspended above the frame 21 and is connected to the material supply device via a pipeline. The support 42 is mounted on the frame 21 and is specifically a rectangular frame structure. The feed hopper 43 is located at the top of the support 42, directly above the material distribution bin 44, with its bottom (specifically a vertically arranged rectangular tube, slightly smaller than the material distribution bin 44) inserted into the top of the material distribution bin 44. The discharge valve is located at the bottom of the feed hopper 43 and is used to adjust the discharge rate of the feed hopper 43; it is specifically a slide gate valve. The material distribution bin 44 is located inside the support 42 and can move up and down. It is situated above and adjacent to the conveying mechanism 22. Soft baffles (with their lower ends in contact with the lower filter cloth 5) are provided on its front, left, and right bottom sides to prevent sludge from flowing out from the corresponding sides. Its left and right sides are located inside the corresponding sides of the lower filter cloth 5 (preferably at a distance greater than 5 cm). The material distribution roller 45 is arranged horizontally and is located in the lower rear part of the material distribution bin 44. It is used to evenly distribute the material (dispersing the material to both sides). Its left and right sides are provided with spiral blades in opposite directions. The discharge port is located at the rear bottom of the material distribution bin 44 and is specifically a rectangular notch. A lifting gate is located above the discharge port and can be adjusted up and down. It is located above the discharge port and can adjust the height of the discharge port, thus adjusting the material layer thickness. When the frame 21 moves back and forth, the feed hopper 43 is always located directly below the feed inlet 41.

[0053] During the fabric feeding process in the stacked fabric structure 2, both the upper fabric winding assembly 31 and the lower fabric winding assembly 51 unwind. The bottom plate of the filter press frame structure 3 descends in a step-by-step manner to ensure that the top height of the stacked filter cloth remains constant. The mud pressing roller 26, the cloth pressing roller 35, and the material bucket 44 (ensuring that the material can only be conveyed backward) are all in a low position. The stacked fabric structure 2 reciprocates back and forth to stack the filter cloth vertically within the filter press frame structure 3. During the discharge process in the stacked fabric structure 2, both the upper fabric winding assembly 31 and the lower fabric winding assembly 51 rewind at coordinated speeds. The bottom plate rises in a step-by-step manner to ensure that the top height of the stacked filter cloth remains constant. The mud pressing roller 26, the cloth pressing roller 35, and the material bucket 44 (ensuring that the filtered material can pass forward) are all in a high position. The stacked fabric structure 2 does not move back and forth.

[0054] The upper winding assembly 31 includes a mounting base, a transverse slide rail, a slide block, a servo motor, a swing arm, a winding shaft, a tension controller, a fixed arm, a drive roller, a pressure roller, and an upper winding cylinder. The mounting base is mounted on the frame 21, above the filter cloth (upper filter cloth 6 and lower filter cloth 5 stacked vertically). The transverse slide rail is mounted on the mounting base in a left-right direction. The slide block, a rectangular plate arranged in a left-right direction, slides on the transverse slide rail. The servo motor is located between the mounting base and the slide block, driving (through a screw structure, etc.) the slide block to move left and right, and can operate according to the detection results of the upper correction detection assembly 32. The swing arm is vertically arranged, with its lower end hinged (through a left-right rotating shaft) to the rear of the slide block. The winding shaft, arranged in a left-right direction, is located at the upper end of the swing arm, and the filter cloth roll is wound on it. The tension controller is located on the swing arm at the end of the winding shaft, providing tension to the winding shaft; it has a conventional structure. The fixed arm is vertically positioned, with its lower end fixed to the front of the slide block. The drive roller is positioned horizontally, located above the fixed arm, and is driven to rotate by a corresponding motor. The pressure roller is located at the upper end of the fixed arm, capable of vertical movement, and is positioned horizontally, directly above the drive roller. The upper winding cylinder is located between the swing arm and the slide block or fixed arm, and is used to drive the swing arm to rotate forward. Specifically, the upper winding cylinder is positioned obliquely upward from front to back, and is hinged between the middle of the swing arm and the lower part of the fixed arm (via a horizontally rotating shaft). During fabric stacking in structure 2, the swing arm is vertically positioned, the upper filter cloth roll (wound on a winding shaft) is located behind the drive roller, and the pressure roller rises to move away from the drive roller. During fabric discharge in structure 2, the swing arm rotates forward, the top of the upper filter cloth roll rests against the rear side of the drive roller, and the pressure roller presses the upper filter cloth 6 against the top of the drive roller. The lower fabric winding assembly 51 has fewer pressure rollers than the upper fabric winding assembly 31, but its other structure is the same as that of the upper fabric winding assembly 31. The speeds of the drive rollers of the upper fabric winding assembly 31 and the lower fabric winding assembly 51 are coordinated. The mounting base of the lower fabric winding assembly 51 is located at the bottom of the frame 21.

[0055] The upper flattening assembly 33 includes an upper drive motor, an upper drive chain, an upper drive sprocket, and two upper flattening rollers. The upper filter cloth 6 extends diagonally forward and downward to the lower side of the rear upper flattening roller, then diagonally forward and upward to the upper side of the front upper flattening roller, and then diagonally forward and downward to the upper scraping assembly 34. The two upper flattening rollers are arranged side by side, with a sprocket coaxially mounted at the same end (left or right). The upper drive motor is connected to the rear upper flattening roller. The upper drive sprocket is located directly in front of the sprocket on the front upper flattening roller. The rear end of the upper drive chain is wound around the sprocket of the rear upper flattening roller, the front end is wound around the upper drive sprocket, and the lower part of the chain is wound around the upper side of the sprocket of the front upper flattening roller.

[0056] The first lower flattening assembly 53 includes two first lower flattening rollers arranged side-by-side, and the second lower flattening assembly 55 includes a second lower flattening roller, a lower drive motor, a lower drive sprocket, a tension sprocket, and two lower drive chains. The lower filter cloth 5 moves forward to the upper side of the rear second lower flattening roller, then forward and downward to the lower side of the front second lower flattening roller, then diagonally forward and upward to the lower scraping assembly 54, then backward to the upper side of the second lower flattening roller, and then backward to the traction assembly 56. The lower drive motor is connected to the second lower flattening roller. A sprocket is coaxially mounted on the end (left or right) of the first lower flattening roller, and two sprockets (coaxially mounted with the second lower flattening roller) are arranged side-by-side on the corresponding end (left or right) of the second lower flattening roller. The lower drive sprocket is located below the rear first lower flattening roller, and the tension sprocket is located between the second lower flattening roller and the front first lower flattening roller. One lower drive chain is vertically positioned, with its upper end wrapped around a sprocket of the second lower flattening roller and its lower end wrapped around a lower drive sprocket. The rear part of its middle section is wrapped around the front side of a sprocket on the rear first lower flattening roller. Another lower drive chain is positioned diagonally forward from top to bottom, with its upper end wrapped around another sprocket of the second lower flattening roller and its lower end wrapped around a sprocket on the front first lower flattening roller. The front part of its middle section is wrapped around the rear side of a tension chain.

[0057] The upper drive sprocket, upper flattening roller, first lower flattening roller, second lower flattening roller, lower drive sprocket, and tension sprocket are all arranged in the left-right direction. The left and right sides of the upper flattening roller, the first lower flattening roller, and the second lower flattening roller are provided with spiral blades with opposite spiral directions (used to flatten the filter cloth).

[0058] The upper scraping assembly 34 includes an upper scraping roller, an upper scraping shaft, an upper scraper, an upper swing arm, and tension springs. Both the upper scraping roller and the upper scraping shaft are mounted on the frame 21 in a left-right direction (rotatably mounted). The upper scraping roller is located between the front upper flattening roller and the front pressing roller 35, positioned below and in front of the front upper flattening roller and above and in front of the front pressing roller 35. The upper filter cloth 6 passes over the front side of the upper scraping roller. The upper scraping shaft is located above and in front of the upper scraping roller. The upper scraper is positioned diagonally backward from top to bottom, its upper end fixed to the upper scraping shaft, and its lower end abutting against the front side of the upper scraping roller. It is used to scrape off the material on the upper filter belt 6. The upper swing arm is located at the ends of the upper scraping shaft (left and right ends; correspondingly, there are two tension springs), positioned above the upper scraping shaft. The tension spring is located between the upper end of the upper swing arm and the frame 21. It is located on the front side of the upper swing arm and is arranged in the front-rear direction. Its rear end is connected to the upper end of the upper swing arm and its front end is connected to the frame 21. It is used to rotate the upper scraper backward.

[0059] The lower scraping assembly 54 includes a lower scraping roller, a lower scraping shaft, a lower scraper, a lower swing arm, and scraping cylinders. Both the lower scraping roller and the lower scraping shaft are mounted on the frame 21 in a left-right direction (rotatably mounted). The lower scraping roller is located at the front end of the frame 21, directly in front of the second lower flattening roller and above and in front of the first lower flattening roller. The lower scraping shaft is located below the lower scraping roller (specifically, below and in front). The lower scraper is angled backward from bottom to top, its lower end fixed to the lower scraping shaft, and its upper end abutting against the lower front side of the lower scraping roller. The lower swing arm is located at the ends of the lower scraping shaft (left and right ends; correspondingly, there are two scraping cylinders), below the lower scraping shaft. The scraping cylinder is arranged in a front-rear direction, located behind the lower swing arm, with its extension rod hinged to the lower end of the lower swing arm (via a left-right rotating shaft), its extension used to drive the lower scraper to rotate backward.

[0060] The feeding hopper 43 is a flat hopper arranged in the front-to-back direction, wider at the top and narrower at the bottom. The material distribution hopper 44 is rectangular. Four lifting cylinders are located at the four corners of the top of the support 42. The lifting cylinders are vertically downwards, and the lower end of their extension rods is fixedly connected to the top of the material distribution hopper 44; the four lifting cylinders are driven synchronously. A drive motor (arranged in the left-to-right direction) is located at the top of the support 42, and the drive motor is connected to the material distribution roller 45 via a chain (allowing the material distribution hopper 44 to move up and down). The mud pressing roller 26 and the cloth pressing roller 35 are both driven up and down by corresponding cylinders, and these cylinders are driven synchronously with the lifting cylinders.

[0061] Example 2

[0062] See Figure 1-2 Example 2 provides a dewatering device, the structure of which is basically the same as that of Example 1, except that: a fixed frame 7 is provided on the frame 21 in this example. The fixed frame 7 is located above the filter cloth and is specifically a rectangular frame structure. The upper flattening component 33 is located at the top of the fixed frame 7, the upper scraping component 34 is located in the middle of the fixed frame 7, and the pressing roller 35 is located at the lower rear part of the fixed frame 7 and is adjustable up and down on the fixed frame 7.

[0063] Example 3

[0064] Example 3 provides a dehydration device, which has a structure that is basically the same as that of Example 1, except that the reciprocating drive mechanism in this example is located on the right side of the frame 21, and the conveying drive motor is located on the left side of the frame 21.

[0065] Example 4

[0066] Example 4 provides a dewatering device, the structure of which is basically the same as that of Example 1, except that the material processed in this example is wet sludge from a wastewater treatment plant, with a water content of 80-85%. The filter press frame has a capacity of 10m³. 3The pressure of the main hydraulic cylinder is 1250t, and the feed rate of the feeding mechanism 24 is 10m³. 3 The speed of the filter cloth movement is approximately 10-15 m / min, and the cloth speed is 30-45 min / frame. During discharge, the winding speed of the filter cloth is 20-30 m / min, and the discharge speed is 15-22 min / frame. Under dual circulation, the overall treatment time is 50-65 min / frame, which is at least 5% faster than existing technologies. Based on 24 hours a day, the daily processing capacity is approximately 240 tons, and the moisture content of the treated sludge is less than 55%.

[0067] Example 5

[0068] See Figure 1-5 Example 5 provides a dehydration method using the dehydration apparatus provided in Example 1. The method includes:

[0069] When the filter cloth is laid in the stacked structure 2, the filter press frame is located in the material preparation position, the feeding mechanism 24 feeds the material, the upper roll cloth assembly 31 and the lower roll cloth assembly 51 both unwind, the bottom plate of the filter press frame structure 3 descends step by step, the mud pressing roller 26, the cloth pressing roller 35 and the material bucket 44 are all in the low position, the swing arm is set vertically, the pressure roller is in the high position, the scraper cylinder retracts, the active roller does not work, and the stacked structure 2 reciprocates back and forth to stack the filter cloth in the filter press frame structure 3.

[0070] During filter cloth filtration, the filter press frame is located at the filter press station, and the pressure plate of the filter press structure 4 moves downward into the filter press frame and presses against the top of the stacked filter cloth to achieve filtration.

[0071] When the stacked fabric structure 2 discharges material, the filter press frame is located at the material preparation station, the feeding mechanism 24 does not feed material, the upper fabric winding assembly 31 and the lower fabric winding assembly 51 are both wound up and their speeds are coordinated, the bottom plate rises step by step, the mud pressing roller 26, the fabric pressing roller 35 and the fabric bucket 44 are all located at high positions, the swing arm is set obliquely forward, the pressure roller is located at a low position, the scraper cylinder extends, the active roller works, the stacked fabric structure 2 does not move back and forth (such as being fixed to the base 1 by the pneumatic pin at the bottom of the frame 21), the walking track wheel 82 does not mesh with the upper track and the lower track (that is, the walking track wheel 82 is separated from the track 83); the dewatered material is output from the front end of the conveying mechanism 22.

[0072] 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 dewatering device, comprising a stacked cloth structure (2), a filter press frame structure (3), and a filter press structure (4), wherein the stacked cloth structure (2) comprises a frame (21) arranged in a front-to-back direction, a conveying mechanism (22) arranged in a front-to-back direction at the rear of the frame (21), an upper filter cloth operating mechanism (23) and a feeding mechanism (24) located on the upper part of the frame (21) and above the conveying mechanism (22), a lower filter cloth operating mechanism (25) at the front of the frame (21), and the rear end of the conveying mechanism (22). The upper pressing roller (26); the feeding mechanism (24) is located in front of the upper filter cloth operating mechanism (23), the lower filter cloth (5) output by the lower filter cloth operating mechanism (25) is arranged along the upper side of the conveying mechanism (22), the upper filter cloth (6) output by the upper filter cloth operating mechanism (23) covers the upper side of the lower filter cloth (5), the pressing roller (26) can move up and down, and the upper filter cloth (6), the material to be dewatered and the lower filter cloth (5) are stacked to form a filter cloth; characterized in that, The frame (21) can move back and forth; when the frame (21) is in front, the rear end of the conveying mechanism (22) is above the front side of the filter press frame structure (3); when the frame (21) is in the rear, the rear end of the conveying mechanism (22) is above the rear side of the filter press frame structure (3). The upper filter cloth operating mechanism (23) includes an upper roll assembly (31), an upper correction detection assembly (32), an upper flattening assembly (33), an upper scraper assembly (34), and a pressing roller (35) arranged sequentially along the upper filter cloth (6). The upper roll assembly (31) can be adjusted left and right according to the detection result of the upper correction detection assembly (32). The upper flattening assembly (33) is located in front of the upper roll assembly (31), and the upper scraper assembly (34) is located in front of and above the pressing roller (35). The pressing roller (35) is arranged in the left and right direction, and it presses the upper filter cloth (6) against the upper side of the lower filter cloth (5). It can move up and down. The lower filter cloth operating mechanism (25) includes a lower roll cloth assembly (51), a lower correction detection assembly (52), a first lower flattening assembly (53), a lower scraper assembly (54), a second lower flattening assembly (55), and a traction assembly (56) arranged sequentially along the lower filter cloth (5). The lower roll cloth assembly (51) can be adjusted left and right according to the detection result of the lower correction detection assembly (52). The lower scraper assembly (54) is located at the front end of the frame (21). The lower roll cloth assembly (51), the lower correction detection assembly (52), and the first lower flattening assembly (53) are all located below the lower filter cloth (5) and are arranged sequentially from back to front. The lower scraper assembly (54), the second lower flattening assembly (55), the traction assembly (56), and the conveying mechanism (22) are arranged sequentially from front to back and are flush. The feeding mechanism (24) includes a feeding port (41), a support (42) on the frame (21), a feeding hopper (43) at the top of the support (42), a discharge valve at the bottom of the feeding hopper (43), a cloth bucket (44) inside the support (42) that can move up and down, a cloth roller (45) inside the cloth bucket (44), a discharge port at the bottom rear side of the cloth bucket (44), and a lifting gate on the discharge port that can be adjusted up and down. The feeding port (41) is suspended. When the frame (21) moves back and forth, the feeding hopper (43) is always located directly below the feeding port (41). The cloth bucket (44) is located directly below the feeding hopper (43) and is located adjacent to and above the conveying mechanism (22). The cloth roller (45) is arranged in the left and right direction and is located in the lower rear part of the cloth bucket (44). The lifting gate is located above the discharge port and can adjust the height of the discharge port. The conveying mechanism (22) is a chain plate conveyor, with drive shafts at both the front and rear ends; the front drive shaft is located in the middle of the frame (21), and the rear drive shaft is located at the rear end of the frame (21) and is connected to the corresponding conveying drive motor; the bottom of the frame (21) is slidably mounted on the longitudinal slide rail (8), which is arranged along the front and rear direction. The stacked fabric structure (2) also includes a reciprocating drive mechanism, which is located on the left or right side of the frame (21) and opposite to the conveyor drive motor. The reciprocating drive mechanism includes a vertically arranged column (81), a walking track wheel (82) on the column (81) that can move up and down, a rear track wheel coaxially arranged at the end of the drive shaft at the rear end, a front track wheel on the left or right side of the frame (21), a track (83) arranged in the front-rear direction, and a lifting drive assembly for driving the walking track wheel (82) to move up and down. The front track wheel is located directly in front of the rear track wheel. The front and rear ends of (83) are respectively wrapped around the front track wheel and the rear track wheel; the walking track wheel (82) is arranged in the left and right direction, and it is located on the side of the column (81) close to the frame (21), and it is located between the upper track and the lower track of the track (83); when the walking track wheel (82) is in the high position, the walking track wheel (82) meshes with the lower side of the upper track; when the walking track wheel (82) is in the low position, the walking track wheel (82) meshes with the upper side of the lower track; the frame (21) reciprocates in the front and back direction through the up and down movement of the walking track wheel (82); When the fabric is laid in the stacked fabric structure (2), both the upper fabric roll assembly (31) and the lower fabric roll assembly (51) are unwound, the bottom plate of the filter press frame structure (3) descends step by step, the mud pressing roller (26), the fabric pressing roller (35) and the fabric bucket (44) are all in a low position, and the stacked fabric structure (2) moves back and forth to stack the filter cloth in the filter press frame structure (3); when the fabric is discharged from the stacked fabric structure (2), both the upper fabric roll assembly (31) and the lower fabric roll assembly (51) are wound up at the same speed, the bottom plate rises step by step, the mud pressing roller (26), the fabric pressing roller (35) and the fabric bucket (44) are all in a high position, and the stacked fabric structure (2) does not move back and forth.

2. The dehydration device according to claim 1, characterized in that, The filter press frame structure (3) includes a filter press frame, a base plate inside the filter press frame that can move up and down, a stepping lifting assembly that drives the base plate to move up and down, and a transverse hydraulic cylinder that drives the filter press frame to move back and forth. The filter press frame can move between the filter press station and the material preparation station. The filter press station is located directly below the filter press structure (4), and the material preparation station is located directly in front of the filter press station and directly below the rear end of the conveying mechanism (22). The filter press structure (4) includes a base, a pressure plate, and a main hydraulic cylinder for driving the pressure plate to move up and down. When the filter press frame is located at the filter press station, the pressure plate is located inside the filter press frame and presses against the top of the stacked filter cloth.

3. The dehydration device according to claim 2, characterized in that, The upper fabric winding assembly (31) includes a mounting base, a transverse slide rail arranged in the left and right directions on the mounting base, a slide block slidably arranged on the transverse slide rail, a servo motor between the mounting base and the slide block for driving the slide block to move in the left and right directions, a swing arm at the rear of the slide block, a winding shaft at the upper end of the swing arm, a tension controller on the swing arm and located at the end of the winding shaft, a fixed arm at the front of the slide block, an active roller at the upper part of the fixed arm, a pressure roller at the upper end of the fixed arm that can move up and down, and an upper winding cylinder for driving the swing arm to rotate forward. The mounting base is mounted on the frame (21). The servo motor can operate according to the detection result of the upper correction detection assembly (32). The swing arm is vertically arranged... The lower end of the roller is hinged to the slide block; the pressure roller is located directly above the drive roller; when the fabric is being laid in the stacked structure (2), the swing arm is vertically positioned, the upper filter cloth roll is located behind the drive roller, and the pressure roller rises away from the drive roller; when the fabric is being discharged from the stacked structure (2), the swing arm rotates forward, the upper filter cloth roll rests against the rear side of the drive roller, and the pressure roller presses the upper filter cloth (6) against the top of the drive roller; the lower roll assembly (51) reduces the pressure roller relative to the upper roll assembly (31); the mounting seat of the upper roll assembly (31) is located above the filter cloth; the mounting seat of the lower roll assembly (51) is located at the bottom of the frame (21).

4. The dehydration device according to claim 1, characterized in that, The upper filter cloth (6) is inclined forward and downward to the upper flattening assembly (33) and passes through the upper correction detection assembly (32), then inclined forward and downward to the upper scraping assembly (34), then inclined backward and downward to the conveying mechanism (22) and to the front side of the pressure roller (35); the lower filter cloth (5) is forward to the first lower flattening assembly (53) and passes through the lower correction detection assembly (52), then inclined forward and upward to the lower scraping assembly (54), then backward sequentially to the second lower flattening assembly (55), the traction assembly (56) and the conveying mechanism (22).

5. The dehydration device according to claim 4, characterized in that, The upper flattening assembly (33) includes an upper drive motor, an upper drive chain, an upper drive sprocket, and two upper flattening rollers. The two upper flattening rollers are arranged side by side and have a sprocket on the same end. The upper drive motor is connected to the upper flattening roller behind it. The upper drive sprocket is located directly in front of the sprocket on the upper flattening roller in front of it. The rear end of the upper drive chain is wrapped around the sprocket of the upper flattening roller behind it, and its front end is wrapped around the upper drive sprocket. The lower part of the chain is wrapped around the upper side of the sprocket of the upper flattening roller in front of it. The upper filter cloth (6) is obliquely forward and downward to the lower side of the upper flattening roller behind it, then obliquely forward and upward to the upper side of the upper flattening roller in front of it, and then obliquely forward and downward to the upper scraping assembly (34). The first lower flattening assembly (53) includes two first lower flattening rollers arranged side by side. The second lower flattening assembly (55) includes a second lower flattening roller, a lower drive motor, a lower drive sprocket, a tension sprocket, and two lower drive chains. The lower filter cloth (5) moves forward to the upper side of the second lower flattening roller behind it, then forward and downward to the lower side of the second lower flattening roller in front of it, then diagonally forward and upward to the lower scraping assembly (54), then backward to the upper side of the second lower flattening roller, and then backward to the traction assembly (56). The lower drive motor is connected to the second lower flattening roller in a transmission connection. The ends of the first lower flattening roller are coaxially arranged. There are sprockets, and two sprockets are arranged side by side on the left and right sides of the corresponding ends of the second lower flattening roller; the lower drive sprocket is located below the rear first lower flattening roller, and the tension sprocket is located between the second lower flattening roller and the front first lower flattening roller; the upper end of one lower drive chain is wrapped around one sprocket of the second lower flattening roller, the lower end is wrapped around the lower drive sprocket, and the rear side of its middle part is wrapped around the front side of the sprocket on the rear first lower flattening roller; the upper end of another lower drive chain is wrapped around the other sprocket of the second lower flattening roller, the lower end is wrapped around the sprocket on the front first lower flattening roller, and the front side of its middle part is wrapped around the rear side of the tension chain.

6. The dehydration apparatus according to claim 5, characterized in that, The upper scraping assembly (34) includes an upper scraping roller, an upper scraping shaft above the front of the upper scraping roller, an upper scraper on the upper scraping shaft, an upper swing arm at the end of the upper scraping shaft, and a tension spring between the upper end of the upper swing arm and the frame (21); the upper scraping roller is located between the front upper flattening roller and the pressing roller (35), it is located below the front upper flattening roller, and it is located above the front of the pressing roller (35); the upper filter cloth (6) passes around the front side of the upper scraping roller, and the upper scraping shaft is rotatably mounted on the frame (21); the upper scraper is arranged obliquely from top to bottom and rearward, its upper end is fixed on the upper scraping shaft, and its lower end abuts against the front side of the upper scraping roller; the upper swing arm is located on the upper side of the upper scraping shaft; the tension spring is located on the front side of the upper swing arm, it is connected to the upper end of the upper swing arm, and it is used to rotate the upper scraper backward; The lower scraping assembly (54) includes a lower scraping roller, a lower scraping shaft below the lower scraping roller, a lower scraper on the lower scraping shaft, a lower swing arm at the end of the lower scraping shaft, and a scraping cylinder between the lower end of the lower swing arm and the frame (21). The lower scraping roller is located at the front end of the frame (21), directly in front of the second lower flattening roller, and above and in front of the first lower flattening roller. The lower scraping shaft is rotatably mounted on the frame (21). The lower scraper is arranged obliquely from bottom to top and rearward, with its lower end fixed on the lower scraping shaft and its upper end abutting against the lower front side of the lower scraping roller. The lower swing arm is located on the lower side of the lower scraping shaft. The scraping cylinder is arranged in the front-rear direction, located on the rear side of the lower swing arm, with the front end of its telescopic rod hinged to the lower end of the lower swing arm, and its extension is used to drive the lower scraper to rotate backward.

7. The dehydration apparatus according to claim 6, characterized in that, The frame (21) is provided with a fixed frame (7), which is located above the filter cloth; the upper flattening component (33) is located at the top of the fixed frame (7), the upper scraping component (34) is located in the middle of the fixed frame (7), and the pressing roller (35) is located at the lower rear part of the fixed frame (7) and is adjustable up and down on the fixed frame (7).

8. The dehydration device according to claim 1, characterized in that, The feeding hopper (43) is a flat hopper that is arranged in the front-to-back direction and is larger at the top and smaller at the bottom. The cloth feeding hopper (44) is rectangular and vertically arranged. The support (42) is a rectangular frame structure. Four lifting cylinders are respectively provided at the four corners of the top of the support (42). The lifting cylinders are arranged vertically downward, and the lower end of their telescopic rods is fixedly connected to the top of the cloth feeding hopper (44). The four lifting cylinders are driven synchronously. The top of the support (42) is provided with a drive motor, which is connected to the cloth feeding roller (45) through a chain. The mud pressing roller (26) and the cloth pressing roller (35) are both driven up and down by corresponding cylinders, and the corresponding cylinders are driven synchronously with the lifting cylinders.

9. A dehydration method, employing the dehydration apparatus as described in any one of claims 1-8, characterized in that, The method includes: When the filter press frame is in the preparation position, the feeding mechanism (24) feeds the material, the upper roll assembly (31) and the lower roll assembly (51) unwind the material, the bottom plate of the filter press frame structure (3) descends step by step, the mud roller (26), the cloth roller (35) and the material bucket (44) are all in the low position, the swing arm is set vertically, the pressure roller is in the high position, the scraper cylinder retracts, the active roller does not work, and the back-and-forth reciprocating motion of the filter press frame structure (3) stacks the filter cloth in the filter press frame structure (3); During filter cloth pressing, the filter press frame is located at the filter press station, and the pressure plate of the filter press structure (4) moves downward into the filter press frame and presses against the top of the stacked filter cloth to achieve pressing. When the stacked fabric structure (2) discharges material, the filter press frame is located at the material preparation station. The upper fabric roll assembly (31) and the lower fabric roll assembly (51) are both rolled up and their speeds are matched. The bottom plate rises step by step. The mud pressing roller (26), the fabric pressing roller (35) and the fabric bucket (44) are all located at high positions. The swing arm is set at an angle forward. The pressure roller is located at a low position. The scraper cylinder extends. The active roller works. The stacked fabric structure (2) does not move back and forth. The walking track wheel (82) does not mesh with the upper track and the lower track.

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