A sludge dewatering device for treating pomace wastewater in a factory production of pleurotus eryngii

Abstract

The present application relates to sludge dewatering equipment technical field, especially to a kind of sludge dewatering device for wastewater treatment in apricot mushroom factory production, shell, the shell is provided with filter water cylinder, the wall portion of the filter water cylinder is opened with several water leakage holes and a outlet mouth for sludge;Rotary cylinder, the rotary cylinder is eccentrically arranged in the filter water cylinder, the outer wall of the rotary cylinder and the inner wall of the filter water cylinder form annular dehydration cavity, the volume of which gradually decreases at the outlet mouth for sludge;Pushing piece, the rotary cylinder is circumferentially arranged with multiple pushing pieces.Eccentrically arranged rotary cylinder and filter water cylinder form annular dehydration cavity with gradually changing volume, pushing piece pushes sludge to move from larger volume end to narrow end, implements circumferential progressive extrusion, water is continuously discharged through filter water cylinder, sludge receives continuous and increasing pressure in pushing stroke, realizes deep dewatering, effectively reduces the moisture content of sludge cake.

Description

Technical Field

[0001] This invention relates to the field of sludge dewatering equipment technology, and in particular to a sludge dewatering device for treating wastewater from the industrial production of king oyster mushrooms. Background Technology

[0002] The industrial production of king oyster mushrooms generates a large amount of organic wastewater with high water content. The sludge formed after pretreatment such as flocculation and sedimentation still contains high moisture content and needs to be deeply dehydrated to achieve volume reduction.

[0003] Currently used sludge dewatering equipment, such as plate and frame filter presses and belt filter presses, mostly employ a one-time or staged pressurization method during the extrusion dewatering stage. The pressure gradient is limited, making it difficult to generate continuously increasing extrusion pressure for the high-organic-matter, high-viscosity sludge produced from king oyster mushroom production wastewater. This results in insufficient extraction of internal water from the sludge, leading to a still high moisture content in the dewatered cake. While some equipment using a screw extrusion structure can achieve a certain degree of continuous extrusion, the pressure build-up process in its extrusion chamber is short, similarly failing to meet the requirements for deep dewatering.

[0004] Therefore, it is necessary to provide a dewatering device that can continuously and progressively squeeze sludge, so that the pressure on the sludge gradually increases during the dewatering process, and the water is continuously and fully squeezed out, thereby achieving deep dewatering and effectively reducing the moisture content of the sludge cake after dewatering. Summary of the Invention

[0005] In order to overcome the shortcomings of existing sludge dewatering devices, which are unable to apply continuous and increasing squeezing pressure to sludge, resulting in incomplete dewatering and high moisture content in the sludge cake, this invention provides a sludge dewatering device for treating wastewater from the industrial production of king oyster mushrooms.

[0006] A sludge dewatering device for wastewater treatment in the industrial production of king oyster mushrooms includes: The outer casing contains a water filter cylinder, and the wall of the water filter cylinder has several water leakage holes and a sewage outlet. A rotating cylinder is eccentrically mounted inside the filter cylinder, and an annular dewatering chamber with a gradually decreasing volume at the outlet is formed between the outer wall of the rotating cylinder and the inner wall of the filter cylinder. The drive assembly has a housing provided with a drive assembly for driving the rotating cylinder to rotate at the eccentric position of the filter cylinder; The rotating cylinder has multiple pusher components arranged circumferentially. Each pusher component is movably mounted on the rotating cylinder and can slide and extend relative to the rotating cylinder. An elastic element is provided between each pusher component and the rotating cylinder. Under the action of the elastic element, the outer end of the pusher component always remains in contact with the inner wall of the filter cylinder. This is used to push the sludge along the annular dewatering chamber when the rotating cylinder rotates. The sludge gradually approaches the outlet and is gradually dewatered from the leakage hole under the pressure of the annular dewatering chamber, which has a gradually decreasing volume.

[0007] In a preferred embodiment of the present invention, the water leakage holes are opened in the lower half of the outer wall of the filter cylinder and are arranged in a matrix array, with a hole diameter of 2 to 5 millimeters.

[0008] In a preferred embodiment of the present invention, a pre-separation component is further included. The rotating cylinder is equipped with a pre-separation component for preliminary solid-liquid separation of the sludge and conveying the separated sludge to the annular dewatering chamber. The pre-separation component includes a filter cylinder disposed inside the rotating cylinder, the filter cylinder being fixedly connected to a water filter cylinder. An inclined baffle is provided inside the filter cylinder, dividing the interior of the filter cylinder into a sludge chamber and a wastewater chamber. Filter plates are slidably disposed on the baffle along its inclined direction, the filter plates being used to trap sludge and allow liquid to pass through. The filter cylinder has a sludge collection tank located at the lower inclined end of the filter plate. Both ends of the sludge collection tank are connected to a drain pipe, which extends into the annular dewatering chamber. The outlet of the drain pipe corresponds to a large volume area in the annular dewatering chamber away from the wastewater outlet, while the wastewater outlet corresponds to a small volume area in the annular dewatering chamber. The filter cylinder is connected to an inlet pipe for conveying the wastewater to be treated to the top of the filter plate. The filter cylinder is connected to a drain pipe located at the position corresponding to the wastewater chamber for discharging the separated liquid.

[0009] In a preferred embodiment of the present invention, a sludge discharge hopper is further included, which is disposed on one side of the outer shell and connected to the sludge discharge port.

[0010] In a preferred embodiment of the present invention, the driving assembly includes a drive motor, a rotating shaft, a gear, and a gear ring. The drive motor is mounted on the housing, the rotating shaft is poweredly connected to the drive motor, and the rotating cylinder is provided with a gear ring that cooperates with the gear. The drive motor drives the rotating cylinder to rotate through the rotating shaft and the gear.

[0011] In a preferred embodiment of the present invention, a bidirectional spiral conveying rod is further included. The bidirectional spiral conveying rod is rotatably assembled in the sludge collection tank and is used to forcibly push the sludge in the sludge collection tank to the sewage pipes at both ends. The bidirectional spiral conveying rod has two spiral blades with opposite directions of rotation. The bidirectional spiral conveying rod is connected to the drive assembly and is driven by the drive assembly.

[0012] In a preferred embodiment of the present invention, a vibration driving mechanism is further included, which is connected to the filter plate and is used to drive the filter plate to generate reciprocating vibration when the rotating cylinder rotates.

[0013] In a preferred embodiment of the present invention, the vibration driving mechanism includes an elastic reset member connected to the filter plate, a wave surface disposed on the toothed ring, and a roller disposed on the filter plate and rollingly engaging with the wave surface. When the wave surface rotates with the toothed ring, it pushes the filter plate to reciprocate through the roller. The elastic reset member is used to provide elastic force for the filter plate to reset.

[0014] In a preferred embodiment of the present invention, the water filter cylinder is made of stainless steel and its inner wall is polished.

[0015] The beneficial effects are as follows: 1. The eccentrically set rotating cylinder and the filter cylinder form an annular dewatering chamber with gradually changing volume. The pusher pushes the sludge from the larger end to the narrower end, implementing circumferential progressive extrusion. Water is continuously discharged through the filter cylinder. The sludge is subjected to continuous and increasing pressure during the pushing stroke, achieving deep dewatering and effectively reducing the moisture content of the sludge cake.

[0016] 2. The pusher rotates continuously under the drive of the rotating drum. When the dewatering chamber rotates to the outlet of the narrow volume terminal, the mud cake under maximum compression is directly pushed out by the pusher and slides down along the outlet hopper. Each pusher repeats the mud feeding, squeezing and mud discharging actions in sequence. There is no need to stop the machine or use an additional mud discharging mechanism, thus realizing continuous automatic operation of the entire process.

[0017] 3. The filter plates in the pre-separation assembly operate under oblique reciprocating shaking, which effectively breaks the adhesion and bridging of sludge on the filter plate surface, allowing liquid to seep down quickly and solids to slide down smoothly, preventing filter pore blockage, ensuring the continuous and efficient solid-liquid separation process, and providing uniform material for subsequent dewatering.

[0018] 4. The sludge collection tank is equipped with bidirectional spiral conveyor rods rotating in opposite directions, which actively push the sliding sludge towards the drain pipes at both ends, eliminating the risk of sludge accumulating or forming bridges in the tank, ensuring that the sludge continuously and in equal amounts enters the dewatering chamber's capacity zone, providing a stable and uniform feed for extrusion dewatering. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the mounting plate, filter cylinder, and leakage hole components of the present invention.

[0021] Figure 3This is a three-dimensional structural diagram of the filter cylinder, drain pipe, and liquid inlet pipe of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the rotating cylinder, pusher, and filter plate components of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the filter cylinder, the sludge hopper, and the sludge outlet.

[0024] Figure 6 This is a schematic diagram of the planar structure of the rotating cylinder, the pusher, and the buffer spring of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, including the bidirectional spiral conveyor rod, pulley, and flat belt.

[0026] Figure 8 This is a schematic diagram of the planar structure of the support frame, elastic reset member, and connecting block of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the toothed ring, wave surface, roller, and other components of the present invention.

[0028] In the diagram: 1_outer shell, 101_controller, 102_mounting plate, 103_filter cylinder, 104_drain hole, 105_sludge hopper, 106_sludge outlet, 107_rotating cylinder, 108_pusher component, 109_buffer spring, 201_filter cylinder, 202_filter plate, 203_sludge collection tank, 204_sludge discharge pipe, 205_drain pipe, 206_liquid inlet pipe, 207_wastewater hopper, 301_drive motor, 302_rotating shaft, 303_gear, 304_gear ring, 401_bidirectional spiral conveyor rod, 402_pulley, 403_flat belt, 501_support frame, 502_elastic reset component, 503_connecting block, 504_wavy surface, 505_roller. Detailed Implementation

[0029] Although the invention may be described with respect to specific applications or industries, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0030] Example 1: A sludge dewatering device for wastewater treatment in the industrial production of king oyster mushrooms, such as... Figures 1-6As shown, the system includes a housing 1, a controller 101, a mounting plate 102, a filter cylinder 103, a sludge discharge hopper 105, a rotating cylinder 107, a pusher 108, a buffer spring 109, a pre-separation assembly, and a drive assembly. The housing 1 is a frame structure with detachable outer wall panels. The controller 101 is bolted to the lower right side wall of the housing 1. The mounting plates 102 are symmetrically bolted to the upper inner part of the housing 1. The filter cylinder 103 is fixedly connected between the two mounting plates 102. Multiple drainage holes 104 are evenly spaced in the lower half of the outer wall of the filter cylinder 103. The upper left side wall of the filter cylinder 103 has a sludge outlet 106 along the front-to-back direction. The upper half of the left side wall of the outer shell 1 is an open structure, corresponding to the sludge outlet 106. A sludge discharge hopper 105 is fixedly installed at the open structure of the left side wall of the outer shell 1, below the sludge outlet 106. The inner wall of the sludge discharge hopper 105 is smoothly connected to the sludge outlet 106 and the left side wall of the outer shell 1, so that the sludge discharged through the sludge outlet 106 can fall into the sludge discharge hopper 105 and slide down the sludge discharge hopper 105 for discharge. The rotating cylinder 107 is eccentrically mounted on the filter cylinder 103. Inside, its rotation center is offset from the center of the filter cylinder 103. An annular dewatering chamber with gradually decreasing volume is formed between the outer wall of the rotating cylinder 107 and the inner wall of the filter cylinder 103 at the outlet 106, used to squeeze and dewater the sludge. Multiple radial grooves are arranged circumferentially on the outer wall of the rotating cylinder 107. A pusher 108 is slidably fitted in each groove. The pusher 108 can extend and retract radially along the groove. Multiple elastic elements are connected between the inner end of the pusher 108 and the corresponding groove. In this embodiment, the elastic element is a buffer spring 109. Under the elastic force, the outer end of the pusher 108 always abuts against the inner wall of the filter cylinder 103. When the rotating cylinder 107 rotates, it drives the pusher 108 to rotate synchronously. Constrained by the inner wall of the filter cylinder 103, the pusher 108 automatically expands and contracts radially with the change of the gap of the annular dewatering chamber. A pre-separation component is provided inside the rotating cylinder 107 for preliminary solid-liquid separation of sludge and conveying the separated sludge to the dewatering chamber. A drive component is provided on the outer shell 1 for driving the rotating cylinder 107 to rotate at the eccentric position of the filter cylinder 103.

[0031] The filter cylinder 103 is made of stainless steel, and its inner wall is polished. Stainless steel has good corrosion resistance and structural strength, and can withstand the continuous pressure during the sludge extrusion process. After polishing the inner wall, the frictional resistance of the pusher 108 when sliding on the surface can be reduced, wear can be reduced, and the service life of the pusher 108 seal can be extended. The drainage holes 104 in the lower half of the outer wall of the filter cylinder 103 are arranged in a matrix array with a diameter of 2 to 5 mm. The matrix array arrangement ensures sufficient opening rate per unit area, so that the extruded water can be discharged quickly. The hole diameter range can effectively intercept sludge solids while ensuring smooth drainage and prevent fine particles from being lost with the water.

[0032] like Figures 1-5As shown, the pre-separation assembly includes a filter cylinder 201, a filter plate 202, a sewage pipe 204, a drain pipe 205, an inlet pipe 206, and a wastewater hopper 207. The filter cylinder 201 is rotatably connected to the inner side of the rotating cylinder 107. The filter cylinder 201 is fixedly connected to the water filter cylinder 103. Through holes are provided on both mounting plates 102 at the front and rear ends of the filter cylinder 201 to avoid obstructing the front and rear end faces of the filter cylinder 201. An integrally formed, obliquely arranged partition is provided inside the filter cylinder 201, dividing the interior of the filter cylinder 201 into an upper sludge chamber and a lower wastewater chamber. The filter plate 202 is slidably mounted on the partition along its inclined direction. The filter plate 202 is a plate-shaped filter structure with multiple filter holes for trapping sludge. The filter cylinder 201 at the position corresponding to the wastewater chamber... The rear end is a closed structure, while the front and rear ends corresponding to the sludge chamber are sunken open structures. During equipment maintenance, the rear wall panel of the outer shell 1 can be removed to clean the filter plate 202 through this open area. A sludge collection trough 203 is integrally formed inside the filter cylinder 201 at the lower position corresponding to the sewage chamber. The sludge collection trough 203 is a tubular structure, corresponding to the inclined lower end of the filter plate 202, so that the sludge trapped by the filter plate 202 can slide down the inclined surface into the sludge collection trough 203. The two ends of the sludge collection trough 203 on the front and rear side walls of the filter cylinder 201 are respectively connected to and connected to the two drain pipes 204. Both drain pipes 204 penetrate the mounting plate 102 and the outer wall of the filter cylinder 103 on the same side, and extend into the annular dewatering chamber between the filter cylinder 103 and the rotating cylinder 107. In this process, the sludge in the collection tank 203 is discharged into the annular dewatering chamber via the drain pipe 204. The outlets of the two drain pipes 204 correspond to the wide volume area of ​​the annular dewatering chamber, while the outlet 106 corresponds to the narrow volume area of ​​the annular dewatering chamber. This allows the sludge to be maximally compressed in the narrow volume area under the circumferential pushing of the pusher 108 before being discharged from the outlet 106. A liquid inlet pipe 206 for conveying wastewater is installed through the front and rear side walls of the outer shell 1. The liquid inlet pipe 206 passes through the through hole of the mounting plate 102 and extends to the high position of the sludge chamber inside the filter cylinder 201, and is located above the filter plate 202. Multiple outlets are spaced apart at the bottom of the liquid inlet pipe 206 corresponding to the position of the sludge chamber, thereby achieving diversion of the liquid inlet pipe 206 and ensuring uniform discharge of wastewater. On the filter plate 202, drain pipes 205 are connected to the front and rear side walls of the rotating cylinder 107 at positions corresponding to the sewage chambers. The drain pipes 205 extend from the openings of the corresponding mounting plates 102 and slide through the outer wall of the outer shell 1 to discharge the separated sewage. Inside the outer shell 1, at the bottom position corresponding to the position between the two mounting plates 102, a wastewater hopper 207 is connected. The wastewater hopper 207 has a bucket structure with openings at the top and bottom. The sewage discharged from the drain holes 104 on the filter cylinder 103 falls into the wastewater hopper 207 and is finally discharged from the bottom outlet. The cross-section of the sludge discharge hopper 105 has a tapered structure that is wider at the top and narrower at the bottom. Its inner wall surface is a smooth slope. The tapered structure can guide the discharged dewatered sludge cake to slide down in a concentrated manner, avoiding the dispersion or residue of sludge in the sludge discharge hopper 105.The smooth slope reduces sludge adhesion, ensuring smooth sludge discharge.

[0033] like Figures 1-3 As shown, the drive assembly includes a drive motor 301, a rotating shaft 302, a gear 303, and a gear ring 304. The drive motor 301 is bolted to the front sidewall of the housing 1. The drive motor 301 is electrically connected to the controller 101. A rotating shaft 302 is connected to the output shaft of the drive motor 301. This rotating shaft 302 rotates through the front sidewall of the housing 1 and is rotatably connected to the front mounting plate 102. Another rotating shaft 302 is also rotatably connected to the rear mounting plate 102. Gears 303 are fixedly connected to both rotating shafts 302. Gear rings 304 are fixedly connected to the front and rear sidewalls of the rotating cylinder 107 at positions corresponding to the outer sides of each mounting plate 102. The gears 303 mesh with the gear rings 304 on the same side. The drive motor 301 is a low-speed, high-torque variable frequency reduction motor with a rated output speed of 10–25 r / min, preferably 12–18 r / min. The transmission ratio between gear 303 and gear ring 304 is 3:1 to 8:1, preferably 5:1 to 6:1, so that the actual working speed of rotating drum 107 is 2 to 6 r / min, preferably 3 to 4 r / min. The rated load torque of drive motor 301 is not less than 190 N·m, preferably 200 to 400 N·m; the peak load torque is not less than 350 N·m, preferably 400 to 600 N·m, and drive motor 301 has an overload capacity of not less than 1.8 times to overcome load fluctuations during startup, sludge blockage, and compression peak values ​​in the narrow volume area at the front end of sewage outlet 106.

[0034] When treating production wastewater, the wastewater is first connected to the inlet pipe 206 through a pipeline, and the outlet of the drain pipe 205 and the wastewater hopper 207 are connected to an external collection container through external pipelines. At the same time, a sludge collection frame is placed at the corresponding position below the sludge hopper 105. The wastewater conveying is started simultaneously, and the drive motor 301 is started through the controller 101. The drive motor 301 drives the front rotating shaft 302 to rotate. The front rotating shaft 302 meshes with the gear ring 304 on the front side of the rotating cylinder 107 through the gear 303, thereby driving the rotating cylinder 107 to rotate eccentrically inside the filter cylinder 103. The rear gear ring 304 then... The rear gear 303 and the rear rotating shaft 302 move synchronously to ensure the smooth operation of the rotating cylinder 107. At the same time, the wastewater from the production of king oyster mushrooms to be treated is sent to the high position of the sludge chamber inside the filter cylinder 201 through the liquid inlet pipe 206. After the wastewater enters the filter cylinder 201, it is evenly distributed from multiple outlets at the bottom of the liquid inlet pipe 206 and falls downward onto the surface of the inclined filter plate 202. Under the action of gravity, the wastewater passes through the filter plate 202, and the liquid part enters the sewage chamber below. Then it is discharged from the drain pipe 205 to the external collection container, while the solid sludge is intercepted by the filter plate 202 and slides naturally down the inclined surface of the filter plate 202 into the sludge collection tank 203.

[0035] The sludge flowing into the collection tank 203 is continuously fed out through the drain pipes 204 on both sides. The outlet of the drain pipe 204 corresponds precisely to the volume area of ​​the annular dewatering chamber between the filter cylinder 103 and the rotating cylinder 107. The rotation of the rotating cylinder 107 drives the pusher 108 on it to rotate, and the sludge enters the chamber between adjacent pushers 108 in sequence. As the rotating cylinder 107 rotates eccentrically, the volume of the annular dewatering chamber gradually narrows circumferentially, forming a continuous extrusion channel. During the rotation of the rotating drum 107, the outer end of the pusher 108, under the elastic force of the buffer spring 109, remains in contact with the inner wall of the filter cylinder 103. Two adjacent pushers 108, together with the outer wall of the rotating drum 107 and the inner wall of the filter cylinder 103, form an independent dewatering working chamber. When the working chamber rotates to its maximum capacity, it receives sludge from the discharge pipe 204. As the rotating drum 107 continues to rotate, the volume of the working chamber gradually decreases, and the sludge is progressively compressed. The water content is reduced under pressure. Wastewater continuously seeps out from the drain hole 104 of the filter cylinder 103, falling into the wastewater hopper 207 below and converging along the inclined surface inside the wastewater hopper 207. Finally, it is discharged from the bottom outlet into an external collection container. The sludge in the dewatering chamber is continuously pushed towards the narrow volume by the pusher 108. During this process, the moisture content of the sludge gradually decreases, achieving deep dewatering. When the pusher 108 carrying the dewatered sludge cake rotates to the narrow volume end position corresponding to the sewage outlet 106... When the sludge is placed, it has been squeezed to the maximum extent. At this time, under the continuous pushing force of the pusher 108, the dewatered sludge blocks are directly pushed out of the outlet 106 and fall into the outlet hopper 105. Then, they slide down along the outlet hopper 105 to the sludge collection box placed below, completing a single dewatering and sludge discharge cycle. As the rotating drum 107 rotates continuously, each pusher 108 repeats the actions of feeding sludge, squeezing and dewatering, and discharging sludge in sequence. The whole set of equipment realizes continuous sludge dewatering treatment of the wastewater from the production of king oyster mushrooms.

[0036] Example 2: Based on Example 1, such as Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, it also includes a bidirectional spiral conveyor rod 401, pulleys 402, and a flat belt 403. The bidirectional spiral conveyor rod 401 is rotatably mounted inside the sludge collection tank 203 along its length. The front and rear ends of the main shaft of the bidirectional spiral conveyor rod 401 rotatably pass through the sewage pipes 204 on both sides and extend to the outside. The spiral blades of the front section and the spiral blades of the rear section of the bidirectional spiral conveyor rod 401 rotate in opposite directions to force the sludge in the sludge collection tank 203 to the sewage pipes 204 on both sides. The front and rear ends of the main shaft of the bidirectional spiral conveyor rod 401 are fixedly connected to pulleys 402 at positions corresponding to the outside of the sewage pipes 204. The two rotating shafts 302 are also fixedly connected to pulleys 402. A flat belt 403 is wound between the two pulleys 402 on the same side.

[0037] When the drive motor 301 drives the gear ring 304 and the rotating cylinder 107 to rotate via the rotating shaft 302 and gear 303, the pulleys 402 fixed on the front and rear rotating shafts 302 rotate synchronously. The power is transmitted through the flat belt 403 to the pulleys 402 at both ends of the main shaft of the bidirectional spiral conveyor 401, thereby driving the bidirectional spiral conveyor 401 to rotate stably in the sludge collection tank 203. Since the spiral blades of the front and rear sections of the bidirectional spiral conveyor 401 rotate in opposite directions, the sludge falling into the sludge collection tank 203 is pushed evenly in both directions under the axial thrust of the blades and is forced into the drain pipes 204 on both sides. This active conveying method eliminates the possibility of sludge accumulating or forming bridges in the sludge collection tank 203, ensuring that the sludge can continuously and equally enter the annular dewatering chamber between the filter cylinder 103 and the rotating cylinder 107 through the drain pipe 204, providing a uniform and stable feeding guarantee for subsequent continuous extrusion dewatering.

[0038] like Figure 5 , Figure 8 and Figure 9 As shown, it also includes a support frame 501, an elastic reset component 502, a connecting block 503, and rollers 505. The support frame 501 is bolted to the bottom surface of the partition inside the filter cylinder 201. The filter plate 202 is slidably connected to the support frame 501. The front and rear sides of the support frame 501 are fitted with elastic reset components 502, which are reset springs. The two ends of the elastic reset component 502 are fixedly connected to the support frame 501 and the filter plate 202, respectively. The front and rear ends of the upper part of the filter plate 202 are bolted to the connecting blocks 503. The closed surfaces of the front and rear side walls of the filter cylinder 201 are provided with clearance grooves corresponding to the movement paths of the connecting blocks 503. The connecting blocks 503 extend from the corresponding clearance grooves. Rollers 505 are rotatably connected to each connecting block 503. The inner circumferential surfaces of the two toothed rings 304 are both set as wavy surfaces 504. The rollers 505 on the two connecting blocks 503 respectively form a rolling fit with the wavy surfaces 504 of the corresponding side toothed rings 304.

[0039] During the eccentric rotation of the rotating cylinder 107, the toothed ring 304 rotates synchronously circumferentially. The wavy surface 504 on the inner circumferential surface of the toothed ring 304 has alternating convex and concave parts distributed circumferentially. Under the elastic force of the elastic reset member 502, the roller 505 always keeps close to the wavy surface 504 and forms a rolling fit. When the convex part of the wavy surface 504 rotates to contact the roller 505, the convex part pushes the roller 505, the connecting block 503 and the filter plate 202 as a whole to slide downward along the guide slope of the support frame 501, while compressing the elastic reset member 502. When the concave part of the wavy surface 504 rotates... When the roller reaches position 505, the elastic force accumulated in the elastic reset member 502 is released, pushing the filter plate 202 to slide upward along the inclined surface of the support frame 501 to return to its original position. The toothed ring 304 rotates continuously, and the filter plate 202 then generates high-frequency oblique reciprocating vibration. This vibration effectively breaks the adhesion and bridging phenomenon of sludge on the surface of the filter plate 202, accelerates the solid-liquid separation process, and causes the intercepted sludge to slide quickly down the inclined surface into the sludge collection tank 203, significantly improving the initial filtration efficiency. In coordination with the bidirectional spiral conveyor rod 401, the entire sludge dewatering process is smoother and more efficient.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sludge dewatering device for wastewater treatment in the industrial production of king oyster mushrooms, characterized in that, include: The outer shell (1) is provided with a water filter cylinder (103) inside the outer shell (1). The wall of the water filter cylinder (103) is provided with several water leakage holes (104) and a sewage outlet (106). Rotating cylinder (107) is eccentrically mounted inside the filter cylinder (103). The outer wall of the rotating cylinder (107) and the inner wall of the filter cylinder (103) form an annular dewatering chamber with a gradually decreasing volume at the sewage outlet (106). The drive assembly is provided on the housing (1) for driving the rotating cylinder (107) to rotate at the eccentric position of the filter cylinder (103); The rotating cylinder (107) has multiple pusher components (108) arranged circumferentially. Each pusher component (108) is movably mounted on the rotating cylinder (107) and can slide and extend relative to the rotating cylinder (107). An elastic element is provided between each pusher component (108) and the rotating cylinder (107). The outer end of the pusher component (108) is always in contact with the inner wall of the filter cylinder (103) under the action of the elastic element. It is used to push the sludge along the annular dewatering chamber when the rotating cylinder (107) rotates. The sludge gradually approaches the outlet (106) and is gradually dewatered from the drain hole (104) under the pressure of the annular dewatering chamber with gradually decreasing volume.

2. The sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 1, characterized in that: The water leakage holes (104) are located in the lower half of the outer wall of the filter cylinder (103) and are arranged in a matrix array with a diameter of 2 to 5 millimeters.

3. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 1, characterized in that: It also includes a pre-separation component. The rotating cylinder (107) is equipped with a pre-separation component for preliminary solid-liquid separation of sludge and conveying the separated sludge to the annular dewatering chamber. The pre-separation component includes a filter cylinder (201) disposed inside the rotating cylinder (107). The filter cylinder (201) is fixedly connected to the water filter cylinder (103). The filter cylinder (201) is provided with an inclined partition, which divides the interior of the filter cylinder (201) into a sludge chamber and a wastewater chamber. A filter plate (202) is slidably disposed on the partition along its inclined direction. The filter plate (202) is used to trap sludge and allow liquid to pass through. The filter cylinder (201) contains a filter plate (202). 202) A sludge collection tank (203) is provided at the lower inclined position. Both ends of the sludge collection tank (203) are connected to a drain pipe (204). The drain pipe (204) extends into the annular dehydration chamber. The outlet of the drain pipe (204) corresponds to the large volume area in the annular dehydration chamber away from the outlet (106). The outlet (106) corresponds to the small volume area in the annular dehydration chamber. The filter cylinder (201) is connected to an inlet pipe (206) for transporting the wastewater to be treated to the top of the filter plate (202). The filter cylinder (201) is connected to a drain pipe (205) at the position corresponding to the wastewater chamber for exporting the separated liquid.

4. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 3, characterized in that: It also includes a sludge discharge hopper (105), which is disposed on one side of the outer shell (1) and connected to the sludge outlet (106).

5. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 3, characterized in that: The drive assembly includes a drive motor (301), a rotating shaft (302), a gear (303), and a gear ring (304). The drive motor (301) is mounted on the housing (1). The rotating shaft (302) is poweredly connected to the drive motor (301). The rotating cylinder (107) is provided with the gear ring (304) that cooperates with the gear (303). The drive motor (301) drives the rotating cylinder (107) to rotate through the rotating shaft (302) and the gear (303).

6. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 5, characterized in that: It also includes a bidirectional spiral conveyor rod (401), which is rotatably mounted in the sludge collection tank (203) and is used to forcefully push the sludge in the sludge collection tank (203) to the sewage pipes (204) at both ends. The bidirectional spiral conveyor rod (401) has two spiral blades with opposite directions of rotation. The bidirectional spiral conveyor rod (401) is connected to the drive assembly and is driven by the drive assembly.

7. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 6, characterized in that: It also includes a vibration drive mechanism, which is connected to the filter plate (202) and is used to drive the filter plate (202) to generate reciprocating vibration when the rotating cylinder (107) rotates.

8. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 7, characterized in that: The vibration drive mechanism includes an elastic reset member (502) connected to the filter plate (202), a wave surface (504) disposed on the toothed ring (304), and a roller (505) disposed on the filter plate (202) and rollingly engaged with the wave surface (504). When the wave surface (504) rotates with the toothed ring (304), it pushes the filter plate (202) to reciprocate through the roller (505). The elastic reset member (502) is used to provide the elastic force for the filter plate (202) to reset.

9. A sludge dewatering device for industrialized production wastewater treatment of king oyster mushrooms according to claim 1, characterized in that: The filter cylinder (103) is made of stainless steel and its inner wall is polished.

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