A dewatering and squeezing device for sewage sludge treatment

Abstract

This invention discloses a dewatering and extrusion device for sewage sludge treatment, relating to the field of sewage sludge treatment technology. It includes a conveyor belt for conveying sludge cake, with pressure equalization drive components on both sides of the conveyor belt; several extrusion components are arranged between two pressure equalization drive components, the extrusion components being used to extrude the sludge and guide the water out of the sludge, and the pressure equalization drive components being used to apply uniform pressure to the extrusion components; each extrusion component includes an extrusion box; each pressure equalization drive component includes a linkage plate for uniformly distributing pressure; and several adapters are equidistantly fixed to one side of the linkage plate. This invention can simultaneously and uniformly extrude sludge from different locations, reducing the moisture content of the filter cake, obtaining a drier sludge cake, reducing the cost and difficulty of subsequent drying or treatment, while shortening the extrusion time and increasing the filtration cycle.

Description

Technical Field

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

[0002] Wastewater treatment processes generate a large amount of sludge. When treating sludge, it is necessary to remove the water from the sludge and mechanically compress the sludge with extremely high water content to significantly reduce its volume and weight, so as to facilitate subsequent transportation, landfill or resource utilization.

[0003] Plate and frame filter presses are a common type of dewatering and extrusion device used in existing sewage sludge treatment. They work by squeezing sewage through plates and frames, thereby causing the sewage to seep out of the sludge. However, in existing plate and frame filter presses, the pressure is transmitted step by step from the clamping plate at one end to the thrust plate at the other end. Therefore, the pressure decreases as it passes through each plate and frame due to friction and structural deformation. This means that the filter chambers near the clamping plate experience the highest pressure, while the filter chambers farther from the clamping plate experience the lowest pressure. This leads to inconsistent dryness of the filter cake in the same batch, affecting the overall filtration effect. Furthermore, because the pressure is transmitted step by step, it takes a long time, prolonging the time required for sewage sludge dewatering. Summary of the Invention

[0004] The main objective of this invention is to provide a dewatering and squeezing device for sewage sludge treatment, which can effectively solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A dewatering and extrusion device for sewage sludge treatment includes a conveyor belt for conveying sludge cake, and pressure equalization drive components are provided on both sides of the conveyor belt.

[0007] A plurality of extrusion components are provided between the two pressure equalization drive components. The extrusion components are used to extrude sludge and guide water out of the sludge. The pressure equalization drive components are used to apply uniform pressure to the plurality of extrusion components.

[0008] The extrusion assembly includes an extrusion box;

[0009] The pressure equalization drive assembly includes a linkage plate, which is used to evenly distribute pressure.

[0010] Several adapters are fixed at equal intervals on one side of the linkage plate;

[0011] Several linkage rods are rotatably connected to the front and rear ends of one side of the adapter. The linkage rods are used to pull the extrusion box to move.

[0012] The base is rotatably connected to the end of the linkage rod, and the base is fixedly connected to the back of the extrusion box;

[0013] Several hydraulic cylinders are equidistantly arranged on the other side of the linkage plate. The piston rods of the hydraulic cylinders are fixedly connected to the linkage plate. The hydraulic cylinders are used to generate pressure to squeeze the sludge.

[0014] A base that is fixed to the outside of the hydraulic cylinder body.

[0015] Specifically, this ensures that during the sludge compression process, several compression boxes are subjected to uniform pressure simultaneously, compressing sludge from different locations at the same time. This reduces the moisture content of the filter cake, resulting in a drier cake, reducing the cost and difficulty of subsequent drying or processing, while also shortening the compression time and increasing the filtration cycle. Furthermore, the sludge from different locations does not interfere with each other during compression, so even if a compression surface malfunctions in one location, it will not affect the completion of the compression and dewatering process for sludge from other locations.

[0016] As a further embodiment of the present invention, the extrusion assembly further includes a porous support plate that penetrates the front body of the extrusion box and is fixedly connected thereto;

[0017] A slot is provided at the top and bottom of the extrusion box, and the slot is located at the front of the porous support plate;

[0018] The multifilament filter plate frame is inserted into the slot and is used to filter water from the sludge during the extrusion process.

[0019] The water outlet pipes are fixed to the bottom of both sides of the back of the squeezing box. The water outlet pipes pass through the back of the squeezing box and are used to guide the water that has been squeezed and filtered out of the sludge.

[0020] Specifically, it facilitates solid-liquid separation and prevents the water formed after squeezing from returning to the silt.

[0021] As a further embodiment of the present invention, the extrusion assembly further includes a plate groove formed in the center of the bottom surface of the extrusion box;

[0022] Magnetic plate one fixed to the top of the slot;

[0023] A second magnetic plate is fixed to the center of the bottom of the multifilament filter plate frame, and the second magnetic plate is magnetically connected to the first magnetic plate.

[0024] Specifically, this prevents the multifilament filter plate and frame from detaching from the compression box under gravity, making it easier to replace the multifilament filter plate and frame after the filter cloth is damaged.

[0025] As a further embodiment of the present invention, an auxiliary component is provided directly above the conveyor belt, the auxiliary component including two end cap frames arranged opposite to each other;

[0026] Several auxiliary extrusion frames are set between the two end cap frames;

[0027] The slide rods are fixed between the two end cap frames and near the four corners, and the extrusion box is slidably connected to the slide rods;

[0028] The mating sleeves are fixed to the four corners of the inner wall of the auxiliary extrusion frame and the end cap frame, and the mating sleeves are fixed to the slide rod.

[0029] Specifically, the water in the silt will seep out due to compression, and after the silt loses water, it will gradually be compressed into a relatively dry mud cake.

[0030] As a further aspect of the present invention, the auxiliary component further includes an auxiliary backflush pipe, which is used to deliver compressed air and passes through the frame of the end cap frame and the auxiliary extrusion frame and is fixedly connected to both.

[0031] Several air outlets are opened through the bottom of the auxiliary backflushing pipe;

[0032] Elastic gaskets fixed around the air outlet;

[0033] The extrusion assembly also includes an air inlet 2 located at the center of the top of the extrusion box, and a sealing ring fixed to the top of the extrusion box and located at the front and rear ends of the air inlet 2. The extrusion box and the auxiliary extrusion frame are arranged alternately.

[0034] Specifically, it facilitates the cleaning of multifilament filter plates and frames, and is beneficial for the regeneration and reuse of multifilament filter plates and frames.

[0035] As a further embodiment of the present invention, the auxiliary component further includes a frame-type airbag disposed inside the end cap frame and the auxiliary extrusion frame, wherein the frame of the frame-type airbag is fixedly connected to the inner wall of the end cap frame and the auxiliary extrusion frame and the mating sleeve.

[0036] An air inlet is located in the center of the top frame of the frame-type airbag, and the air inlet is connected to the interior of the auxiliary recoil pipe through the air outlet.

[0037] Specifically, after the frame-type airbag is inflated, it bulges out and pushes the mud cake out from the end cap frame and auxiliary extrusion frame, which facilitates the unloading of the mud cake and improves the efficiency of the entire sludge dewatering process.

[0038] As a further aspect of the present invention, the auxiliary component also includes a sludge conveying pipe disposed above the auxiliary backflushing pipe, the sludge conveying pipe being used to convey sludge;

[0039] Several sludge distribution pipes are installed through both sides of the sludge conveying pipe. The sludge distribution pipes are used to convey sludge to the inside of the end cap frame and the auxiliary extrusion frame.

[0040] The sludge guide channel is located on the top of the frame-type airbag and on both sides of the air inlet. The sludge guide channel is located directly below the sludge distribution pipe and is used to circulate sludge.

[0041] Specifically, this facilitates the simultaneous transport of sewage sludge to each extrusion and dewatering point, thereby improving the overall processing efficiency of the extrusion and dewatering process.

[0042] As a further embodiment of the present invention, a backflush assembly is provided in front of the conveyor belt, and the backflush assembly includes an air supply pipe.

[0043] An electromagnetic pressure relief valve is installed at the front end of the gas pipeline;

[0044] A recoil drive system is installed at one end of the gas pipeline;

[0045] The other end of the gas pipeline is connected to the auxiliary backflushing pipe via a flange.

[0046] Specifically, the electromagnetic pressure relief valve opens to facilitate pressure relief and prevent the gas in the frame-type airbag from being unable to escape, thus affecting the squeezing and dehydration process.

[0047] As a further embodiment of the present invention, the recoil drive system includes an air tank, an air compressor, and a pulse valve.

[0048] Specifically, the pulse valve is activated to pump gas into the auxiliary backflush pipe, which facilitates the supply of gas required for backflush cleaning and backflush unloading.

[0049] As a further embodiment of the present invention, water inlet channels are provided on both sides of the conveyor belt, the water inlet channels are fixedly connected to the base, and the water inlet channels are located directly below the water outlet pipe.

[0050] Specifically, the water flows to the outside through the water inlet trough 4 to facilitate the drainage of water.

[0051] The beneficial effects of this invention are as follows:

[0052] This invention ensures that during the sludge compression process, the pressure is evenly distributed across several connecting parts via a linkage plate, and then compressed through a linkage rod. This guarantees that the compression boxes are simultaneously subjected to uniform pressure, compressing sludge from different locations at the same time. This reduces the moisture content of the filter cake, resulting in a drier cake and reducing the cost and difficulty of subsequent drying or processing. It also shortens the compression time, increases the filtration cycle, and ensures that the sludge from different locations does not interfere with each other during compression. Therefore, even if a compression surface malfunctions at one location, it will not affect the completion of the compression and dewatering process for sludge from other locations.

[0053] This invention provides the air required for backflushing cleaning by setting up a backflushing component. Compressed air is delivered to the extrusion box through an auxiliary backflushing pipe. The air backflushes the multifilament filter plate frame, which facilitates the cleaning of the surface of the multifilament filter plate frame, avoids filter hole clogging, and facilitates the regeneration and reuse of the multifilament filter plate.

[0054] This invention provides the air required for backflushing and unloading by setting up a backflushing component. Compressed air is delivered to the frame-type airbag through an auxiliary backflushing pipe. When the frame-type airbag is inflated, it is easy to squeeze the sludge cake out from the end cap frame and the auxiliary extrusion frame, which facilitates automatic unloading, reduces the time required for the entire sewage sludge extrusion and dewatering process, and improves the treatment efficiency. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the overall structure of a dewatering and extrusion device for sewage sludge treatment according to the present invention;

[0056] Figure 2 This is a demonstration diagram of a dewatering and extrusion device for sewage sludge treatment under extrusion conditions according to the present invention.

[0057] Figure 3 This is a partial structural schematic diagram of a dewatering and extrusion device for sewage sludge treatment according to the present invention;

[0058] Figure 4 This is a schematic diagram of the pressure equalization drive component in a dewatering and extrusion device for sewage sludge treatment according to the present invention.

[0059] Figure 5 This is a structural exploded view of the extrusion component in a dewatering extrusion device for sewage sludge treatment according to the present invention;

[0060] Figure 6 This invention relates to a dewatering and extrusion device for sewage sludge treatment. Figure 5 Enlarged view of area A in the image;

[0061] Figure 7 This invention relates to a dewatering and extrusion device for sewage sludge treatment. Figure 5 A bottom view;

[0062] Figure 8 This is a schematic diagram of the structure of an auxiliary component in a dewatering and extrusion device for sewage sludge treatment according to the present invention;

[0063] Figure 9 This invention relates to a dewatering and extrusion device for sewage sludge treatment. Figure 8 A bottom view;

[0064] Figure 10 This invention relates to a dewatering and extrusion device for sewage sludge treatment. Figure 9 Enlarged view of area B in the image;

[0065] Figure 11 This is a schematic diagram of the auxiliary extrusion frame in a dewatering extrusion device for sewage sludge treatment according to the present invention;

[0066] Figure 12This is a schematic diagram of the frame-type airbag in a dewatering and squeezing device for sewage sludge treatment according to the present invention.

[0067] Figure 13 This is a schematic diagram of the backflushing component in a dewatering and squeezing device for sewage sludge treatment according to the present invention.

[0068] In the picture:

[0069] 1. Pressure equalization drive assembly; 101. Linkage plate; 102. Hydraulic cylinder; 103. Base; 104. Adapter; 105. Linkage rod; 106. Base;

[0070] 2. Auxiliary components; 201. End cap frame; 202. Auxiliary extrusion frame; 203. Slide rod; 204. Frame-type airbag; 205. Auxiliary backflushing pipe; 206. Elastic gasket; 207. Sludge conveying pipe; 208. Sludge distribution pipe; 209. Air outlet; 210. Sludge guide channel; 211. Connecting sleeve; 212. Air inlet one;

[0071] 3. Conveyor belt; 4. Water inlet trough;

[0072] 5. Backflush assembly; 501. Gas supply pipe; 502. Electromagnetic pressure relief valve; 503. Backflush drive system;

[0073] 6. Extrusion assembly; 601. Extrusion box; 602. Porous support plate; 603. Water outlet pipe; 604. Slot; 605. Multifilament filter plate frame; 606. Air inlet hole two; 607. Sealing ring; 608. Plate groove; 609. Magnetic plate one; 610. Magnetic plate two. Detailed Implementation

[0074] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0075] like Figures 1-13 As shown, a dewatering and extrusion device for sewage sludge treatment is described. Please refer to the following document for details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 It includes a conveyor belt 3 for conveying mud cake, and pressure equalization drive components 1 are provided on both sides of the conveyor belt 3.

[0076] A plurality of extrusion components 6 are provided between the two pressure equalization drive components 1. The extrusion components 6 are used to extrude sludge and guide the water in the sludge to flow out. The pressure equalization drive component 1 is used to apply uniform pressure to the plurality of extrusion components 6.

[0077] The extrusion assembly 6 includes an extrusion box 601;

[0078] The pressure equalization drive assembly 1 includes a linkage plate 101, which is used to evenly distribute pressure.

[0079] Several adapter pieces 104 are equidistantly fixed to one side of the linkage plate 101;

[0080] Several linkage rods 105 are rotatably connected to the front and rear ends of one side of the adapter 104. The linkage rods 105 are used to pull the extrusion box 601 to move.

[0081] The base 106 is rotatably connected to the end of the linkage rod 105, and the base 106 is fixedly connected to the back of the extrusion box 601;

[0082] Several hydraulic cylinders 102 are equidistantly arranged on the other side of the linkage plate 101. The piston rod of the hydraulic cylinder 102 is fixedly connected to the linkage plate 101. The hydraulic cylinder 102 is used to generate pressure to squeeze the sludge.

[0083] The base 103 is fixed to the outside of the cylinder body of the hydraulic cylinder 102.

[0084] Specifically, after the sludge is positioned between two opposing compression boxes 601, the hydraulic cylinder 102 is activated, causing the linkage plate 101 to move towards the compression box 601. The linkage plate 101 evenly distributes the pressure from the hydraulic cylinder 102, ensuring the pressure is evenly applied to several connecting parts 104. The connecting parts 104 then compress the linkage rod 105, causing the linkage rod 105 to rotate around the base 106. This pushes the two opposing compression boxes 601 away from each other, while the two opposing compression boxes 601 move closer together. The movement of the compression boxes 601 then compresses the sludge, squeezing out the water. The linkage plate 101 balances the pressure and applies it to several connecting parts 104, while the linkage rod 105 further compresses the boxes 601, ensuring that the sludge is evenly compressed. During the sludge removal process, several extrusion boxes 601 are simultaneously subjected to uniform pressure, extruding sludge from different locations. This reduces the moisture content of the filter cake, resulting in a drier cake and reducing the cost and difficulty of subsequent drying or processing. It also shortens the extrusion time and increases the filtration cycle. Furthermore, the sludge from different locations does not interfere with each other during extrusion. Therefore, even if a fault occurs on the extrusion surface at one location, it will not affect the completion of the extrusion and dewatering process for sludge from other locations. After extrusion, the hydraulic cylinder 102 is restarted to reset the linkage plate 101. During the reset process of the linkage plate 101, the linkage rod 105 pulls the extrusion box 601 to reset, which facilitates the exposure of the sludge cake formed after extrusion. This allows the sludge cake to be unloaded onto the conveyor belt 3, which then transports it to the outside.

[0085] Please refer to this carefully. Figure 5 The extrusion assembly 6 also includes a porous support plate 602 that penetrates the front of the extrusion box 601 and is fixed thereto;

[0086] A slot 604 is provided through the upper and lower ends of the extrusion box 601, and the slot 604 is located at the front of the porous support plate 602;

[0087] The multifilament filter plate frame 605 is inserted into the slot 604. The multifilament filter plate frame 605 is used to filter water in the sludge during the extrusion process.

[0088] Water outlet pipes 603 are fixed to the bottom of both sides of the back of the squeezing box 601. The water outlet pipes 603 penetrate the back of the squeezing box 601 and are used to guide the water that has been squeezed and filtered out of the sludge.

[0089] Specifically, when the squeezing box 601 squeezes the sludge, the multifilament filter plate frame 605 is supported by the porous support plate 602. During the squeezing process, the sludge is filtered by the multifilament filter plate frame 605. The water squeezed out of the sludge passes through the filter holes on the multifilament filter plate frame 605 and the porous support plate 602 in sequence and enters the squeezing box 601. Then it is discharged through the water outlet pipe 603, which facilitates solid-liquid separation and prevents the water formed after squeezing from returning to the sludge.

[0090] Please refer to this carefully. Figure 7 The extrusion assembly 6 also includes a plate groove 608 located in the center of the bottom surface of the extrusion box 601;

[0091] Magnetic plate 609 is fixed to the top of the plate groove 608;

[0092] A second magnetic plate 610 is fixed to the center of the bottom of the multifilament filter plate frame 605, and the second magnetic plate 610 is magnetically connected to the first magnetic plate 609.

[0093] Specifically, after the multifilament filter plate frame 605 is inserted into the slot 604, the second magnetic plate 610 is engaged in the plate groove 608 and attracts each other with the first magnetic plate 609. This prevents the multifilament filter plate frame 605 from detaching from the compression box 601 under gravity. At the same time, when the filter cloth on the multifilament filter plate frame 605 is damaged, the multifilament filter plate frame 605 can be pulled down to disengage from the slot 604, making it easy to replace the multifilament filter plate frame 605 after the filter cloth is damaged.

[0094] Please refer to this carefully. Figure 8 and Figure 11 An auxiliary component 2 is provided directly above the conveyor belt 3. The auxiliary component 2 includes two end cap frames 201 arranged opposite to each other.

[0095] Several auxiliary extrusion frames 202 are set between the two end cap frames 201;

[0096] The slide rod 203 is fixed between the two end cap frames 201 and near the four corners, and the extrusion box 601 is slidably connected to the slide rod 203;

[0097] The mating sleeves 211 are fixed to the four corners of the inner wall of the auxiliary extrusion frame 202 and the end cap frame 201, and the mating sleeves 211 are fixed to the slide rod 203.

[0098] Specifically, when the pressure equalization drive component 1 moves, the traction extrusion box 601 slides along the slide bar 203. When the extrusion box 601 slides into the end cap frame 201 and the auxiliary extrusion frame 202, the sludge is extruded due to the movement of the extrusion box 601. At the same time, due to the obstruction of the end cap frame 201 and the auxiliary extrusion frame 202, the space where the sludge is located gradually decreases. Therefore, the water in the sludge will seep out due to the extrusion, and after the sludge loses water, it will gradually be compressed into a relatively dry mud cake.

[0099] Please refer to this carefully. Figure 9 and Figure 10 The auxiliary component 2 also includes an auxiliary backflush pipe 205, which is used to deliver compressed air. The auxiliary backflush pipe 205 passes through the frame of the end cap frame 201 and the auxiliary extrusion frame 202 and is fixedly connected to both.

[0100] Several air outlets 209 are opened through the bottom of the auxiliary backflushing pipe 205;

[0101] Elastic gaskets 206 are fixed around the vent 209;

[0102] The extrusion assembly 6 also includes an air inlet 606 located at the center of the top of the extrusion box 601, and a sealing ring 607 fixed to the top of the extrusion box 601 and located at the front and rear ends of the air inlet 606. The extrusion box 601 and the auxiliary extrusion frame 202 are arranged alternately.

[0103] Specifically, after the extrusion and dehydration are completed, the pressure equalization drive component 1 is activated to reset the extrusion box 601, aligning the second air inlet 606 with the air outlet 209. The connection between the second air inlet 606 and the air outlet 209 is sealed by the elastic gasket 206 and the sealing ring 607. The gas in the auxiliary backflushing pipe 205 enters the interior of the extrusion box 601 through the air outlet 209 and the second air inlet 606, and then passes through the porous support plate 602 and the multifilament filter plate frame 605 in sequence. During the process of the gas passing through the multifilament filter plate frame 605, a backflushing is formed, which opens the blocked filter holes on the multifilament filter plate frame 605, making it easier to clean the multifilament filter plate frame 605 and facilitating the regeneration and reuse of the multifilament filter plate frame 605.

[0104] Please refer to this carefully. Figure 10 and Figure 12 The auxiliary component 2 also includes a frame-type airbag 204 disposed inside the end cap frame 201 and the auxiliary compression frame 202. The frame of the frame-type airbag 204 is fixedly connected to the inner wall of the end cap frame 201 and the auxiliary compression frame 202 and the docking sleeve 211.

[0105] An air inlet 212 is provided in the center of the top frame of the frame airbag 204. The air inlet 212 is connected to the interior of the auxiliary recoil pipe 205 through the air outlet 209.

[0106] Specifically, after the extrusion and dewatering are completed, the gas in the auxiliary backflushing pipe 205 enters the frame-type airbag 204 through the air outlet 209 and the air inlet 212 to inflate it. After the frame-type airbag 204 is inflated, it pushes the mud cake out from the end cap frame 201 and the auxiliary extrusion frame 202, which facilitates the unloading of the mud cake and improves the efficiency of the entire sludge dewatering process.

[0107] Please refer to this carefully. Figure 10 and Figure 12 The auxiliary component 2 also includes a sludge conveying pipe 207 disposed above the auxiliary backflushing pipe 205, which is used to convey sludge.

[0108] Several sludge distribution pipes 208 are installed through both sides of the sludge conveying pipe 207. The sludge distribution pipes 208 are used to convey sludge to the interior of the end cap frame 201 and the auxiliary extrusion frame 202.

[0109] A sludge guide channel 210 is provided on the top of the frame of the frame-type airbag 204 and on both sides of the air inlet 212. The sludge guide channel 210 is located directly below the sludge distribution pipe 208 and is used to circulate sludge.

[0110] Specifically, during the dewatering of sewage sludge, the pressure equalization drive component 1 is activated, causing the extrusion box 601 to slide a certain distance along the slide bar 203, so that the box body of the extrusion box 601 is submerged in the end cap frame 201 and the auxiliary extrusion frame 202. A cavity for accommodating sludge is formed between the extrusion box 601 and the end cap frame 201, and between the extrusion box 601 and the auxiliary extrusion frame 202. The sludge conveying pipe 207 is connected to a screw pump. Sewage sludge is conveyed to the sludge conveying pipe 207 by the screw pump, and then diverted through the sludge distribution pipe 208. When the sludge flows to the sludge guide channel 210, it is then guided through the sludge guide channel 210 to the cavity of the end cap frame 201 and the auxiliary extrusion frame 202, which facilitates the simultaneous delivery of sewage sludge to each extrusion dewatering point and improves the processing efficiency of the entire extrusion dewatering process.

[0111] Please refer to this carefully. Figure 1 and Figure 13 A backflush assembly 5 is provided in front of the conveyor belt 3. The backflush assembly 5 includes an air supply pipe 501.

[0112] An electromagnetic pressure relief valve 502 is installed at the front end of the gas pipeline 501;

[0113] A recoil drive system 503 is installed at one end of the gas pipeline 501;

[0114] The other end of the gas pipeline 501 is connected to the auxiliary backflushing pipe 205 via a flange.

[0115] Specifically, after the backflush drive system 503 is started, compressed air is delivered to the air supply pipe 501, and then delivered to the auxiliary backflush pipe 205 through the air supply pipe 501, so as to provide the air required for backflush cleaning and backflush unloading. When the extrusion dehydration is performed again, the backflush drive system 503 is turned off, and the electromagnetic pressure relief valve 502 is opened to facilitate pressure relief and prevent the gas present in the frame airbag 204 from not being able to be discharged, which would affect the extrusion dehydration process.

[0116] The recoil drive system 503 includes an air tank, an air compressor, and a pulse valve.

[0117] Specifically, after the air compressor is running, it compresses the air and stores it in the air tank. When backflushing and backflushing are performed, the pulse valve is activated to pump the gas into the auxiliary backflushing pipe 205, so as to provide the gas required for backflushing and backflushing.

[0118] Please refer to this carefully. Figure 1 Water inlet troughs 4 are provided on both sides of the conveyor belt 3. The water inlet troughs 4 are fixedly connected to the base 103 and are located directly below the water outlet pipe 603.

[0119] Specifically, the water generated during the squeezing and dehydration process flows into the water inlet tank 4 through the water outlet pipe 603, and then flows to the outside through the water inlet tank 4 to facilitate the discharge of water.

[0120] Working principle

[0121] The pressure equalization drive assembly 1 starts, causing the extrusion box 601 to slide a certain distance along the slide bar 203, so that the box body of the extrusion box 601 is submerged in the end cap frame 201 and the auxiliary extrusion frame 202. Cavities for accommodating sludge are formed between the extrusion box 601 and the end cap frame 201, and between the extrusion box 601 and the auxiliary extrusion frame 202. The sewage sludge is simultaneously transported to the cavities of each extrusion and dewatering point through the sludge conveying pipe 207 and the sludge distribution pipe 208. Then, the hydraulic cylinder 102 starts, causing the linkage plate 101 to move towards the extrusion box 601. The linkage plate 101 evenly distributes the pressure from the hydraulic cylinder 102, so that the pressure is evenly applied to several adapter pieces 104. Then, through the adapter... The compression rod 105 is pressed by component 104, causing it to rotate around the base 106. This pushes the compression box 601 towards the frame-type airbag 204, thereby compressing the sludge and squeezing out the water. The squeezed water passes through the filter holes on the multifilament filter plate frame 605 and the porous support plate 602 before entering the compression box 601. It is then discharged into the water inlet trough 4 through the water outlet pipe 603. The pressure is balanced by the linkage plate 101 and applied to several connecting components 104. The compression box 601 is then compressed by the linkage rod 105, ensuring that several compression boxes 601 are subjected to uniform pressure simultaneously during the sludge compression process. Simultaneously, the sludge at different locations is squeezed, reducing the moisture content of the filter cake and resulting in a drier cake. This reduces the cost and difficulty of subsequent drying or processing, shortens the squeezing time, and increases the filtration cycle. Furthermore, the squeezing of sludge at different locations does not interfere with each other; therefore, even if a squeezing surface malfunctions at one location, it will not affect the squeezing and dewatering process of sludge at other locations. After squeezing, the pressure equalization drive assembly 1 resets the squeezing box 601, aligning the second air inlet 606 with the air outlet 209. Then, the backflushing assembly 5 is activated, delivering compressed air to the auxiliary backflushing pipe 205. The gas in the auxiliary backflushing pipe 205 passes through the air outlet 209, cooperating with the first air inlet 212 and the air intake. The gas enters the frame-type airbag 204 and the squeezing box 601 through hole 606. After the gas enters the frame-type airbag 204, the airbag 204 is inflated and bulges, pushing the mud cake out from the end cap frame 201 and the auxiliary squeezing frame 202, which facilitates the unloading of the mud cake. The fallen mud cake falls directly onto the conveyor belt 3 and is transported to the outside, improving the efficiency of the entire sludge dewatering process. After the gas enters the squeezing box 601, it passes through the porous support plate 602 and the multifilament filter plate frame 605 in sequence. During the process of the gas passing through the multifilament filter plate frame 605, a backflow is formed, which opens the filter holes blocked on the multifilament filter plate frame 605, making it easier to clean the multifilament filter plate frame 605 and facilitating the regeneration and reuse of the multifilament filter plate frame 605.

[0122] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A dewatering and extrusion device for sewage sludge treatment, comprising a conveyor belt (3) for conveying sludge cake, characterized in that: Both sides of the conveyor belt (3) are provided with pressure equalization drive components (1); A plurality of extrusion components (6) are provided between the two pressure equalization drive components (1). The extrusion components (6) are used to extrude sludge and guide the water in the sludge to flow out. The pressure equalization drive component (1) is used to apply uniform pressure to the plurality of extrusion components (6). The extrusion assembly (6) includes an extrusion box (601); The pressure equalization drive assembly (1) includes a linkage plate (101), which is used to evenly distribute pressure. Several adapters (104) are fixed at equal intervals on one side of the linkage plate (101). Several linkage rods (105) are rotatably connected to the front and rear ends of one side of the adapter (104). The linkage rods (105) are used to pull the extrusion box (601) to move. The base (106) is rotatably connected to the end of the linkage rod (105), and the base (106) is fixedly connected to the back of the extrusion box (601); Several hydraulic cylinders (102) are equidistantly arranged on the other side of the linkage plate (101). The piston rod of the hydraulic cylinder (102) is fixedly connected to the linkage plate (101). The hydraulic cylinder (102) is used to generate pressure to squeeze the sludge. A base (103) is fixed to the outside of the cylinder body of the hydraulic cylinder (102).

2. The dewatering and squeezing device for sewage sludge treatment according to claim 1, characterized in that: The extrusion assembly (6) also includes a porous support plate (602) that penetrates the front of the extrusion box (601) and is fixed thereto. A slot (604) is provided at the top and bottom of the extrusion box (601), and the slot (604) is located at the front of the porous support plate (602); A multifilament filter plate frame (605) is inserted into the slot (604) and is used to filter water in the sludge during the extrusion process; Water outlet pipes (603) are fixed to the bottom of both sides of the back of the squeezing box (601). The water outlet pipes (603) penetrate the back of the squeezing box (601) and are used to guide the water that has been squeezed and filtered out of the sludge.

3. The dewatering and extrusion device for sewage sludge treatment according to claim 1, characterized in that: The extrusion assembly (6) also includes a plate groove (608) located in the center of the bottom surface of the extrusion box (601). Magnetic plate 1 (609) is fixed to the top of the plate groove (608); A second magnetic plate (610) is fixed to the center of the bottom of the multifilament filter plate frame (605), and the second magnetic plate (610) is magnetically connected to the first magnetic plate (609).

4. The dewatering and extrusion device for sewage sludge treatment according to claim 1, characterized in that: An auxiliary component (2) is provided directly above the conveyor belt (3). The auxiliary component (2) includes two end cap frames (201) arranged opposite to each other. Several auxiliary extrusion frames (202) are set between the two end cap frames (201); The slide rod (203) is fixed between the two end cap frames (201) and near the four corners, and the extrusion box (601) is slidably connected to the slide rod (203); The mating sleeves (211) are fixed to the four corners of the inner walls of the auxiliary extrusion frame (202) and the end cap frame (201), and the mating sleeves (211) are fixed to the slide rod (203).

5. A dewatering and extrusion device for sewage sludge treatment according to claim 4, characterized in that: The auxiliary component (2) also includes an auxiliary backflush pipe (205), which is used to transport compressed air. The auxiliary backflush pipe (205) passes through the frame of the end cap frame (201) and the auxiliary extrusion frame (202) and is fixedly connected to both. Several air outlets (209) are opened through the bottom of the auxiliary backflush pipe (205). An elastic gasket (206) is fixed around the air outlet (209). The extrusion assembly (6) also includes an air inlet 2 (606) located at the center of the top of the extrusion box (601), a sealing ring (607) fixed to the top of the extrusion box (601) and located at the front and rear ends of the air inlet 2 (606), and the extrusion box (601) and the auxiliary extrusion frame (202) are arranged alternately.

6. A dewatering and extrusion device for sewage sludge treatment according to claim 4, characterized in that: The auxiliary component (2) also includes a frame-type airbag (204) disposed inside the end cap frame (201) and the auxiliary compression frame (202), the frame of the frame-type airbag (204) being fixedly connected to the inner wall of the end cap frame (201) and the auxiliary compression frame (202) and the docking sleeve (211); An air inlet (212) is provided in the center of the top frame of the frame airbag (204), and the air inlet (212) is connected to the interior of the auxiliary recoil pipe (205) through the air outlet (209).

7. A dewatering and extrusion device for sewage sludge treatment according to claim 4, characterized in that: The auxiliary component (2) also includes a sludge conveying pipe (207) disposed above the auxiliary backflushing pipe (205), the sludge conveying pipe (207) being used to convey sludge; Several sludge distribution pipes (208) are installed on both sides of the sludge conveying pipe (207). The sludge distribution pipes (208) are used to convey sludge to the interior of the end cap frame (201) and the auxiliary extrusion frame (202). A sludge guide channel (210) is provided on the top of the frame of the frame airbag (204) and on both sides of the air inlet (212). The sludge guide channel (210) is located directly below the sludge distribution pipe (208) and is used to circulate sludge.

8. A dewatering and extrusion device for sewage sludge treatment according to claim 1, characterized in that: A backflush assembly (5) is provided in front of the conveyor belt (3), and the backflush assembly (5) includes an air supply pipe (501). An electromagnetic pressure relief valve (502) is installed at the front end of the gas pipeline (501); A recoil drive system (503) is installed at one end of the gas pipeline (501). The other end of the gas pipeline (501) is connected to the auxiliary backflushing pipe (205) via a flange.

9. A dewatering and extrusion device for sewage sludge treatment according to claim 8, characterized in that: The recoil drive system (503) includes an air tank, an air compressor, and a pulse valve.

10. A dewatering and extrusion device for sewage sludge treatment according to claim 1, characterized in that: Water inlet channels (4) are provided on both sides of the conveyor belt (3). The water inlet channels (4) are fixed to the base (103) and the water inlet channels (4) are located directly below the water outlet pipe (603).

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