Dewatering and extruding device for sewage sludge treatment

Abstract

The invention discloses a dewatering and extruding device for sewage and sludge treatment, and relates to the technical field of sewage and sludge treatment, the dewatering and extruding device comprises a conveying belt for conveying mud cakes, and the two sides of the conveying belt are each provided with a uniform pressure driving assembly; a plurality of extrusion assemblies are arranged between the two uniform pressure driving assemblies, the extrusion assemblies are used for extruding sludge and guiding water in the sludge to flow out, and the uniform pressure driving assemblies are used for applying uniform pressure to the extrusion assemblies; the extrusion assembly comprises an extrusion box; the uniform pressure driving assembly comprises a linkage plate, and the linkage plate is used for uniformly distributing pressure; and the plurality of adapters are fixedly connected to one side of the linkage plate at equal intervals. Sludge at different positions can be uniformly extruded at the same time, the water content of a filter cake is reduced, a drier mud cake is obtained, the cost and difficulty of subsequent drying or treatment are reduced, the extrusion time is shortened, and the filtering period is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage sludge treatment, in particular to a dewatering and extruding device for sewage sludge treatment. BACKGROUND

[0002] A large amount of sludge is formed in the sewage treatment process. When the sludge is treated, the water in the sludge needs to be removed. The sludge with a very high water content is extruded by mechanical means to greatly reduce its volume and weight, so as to facilitate subsequent transportation, landfill or resource utilization. The plate-and-frame extrusion filter is one of the common dewatering and extruding devices for sewage sludge treatment. The sewage is extruded by the plate-and-frame, and then the sewage in the sludge seeps out. However, the pressure of the existing plate-and-frame filter is transmitted step by step from the pressing plate at one end to the thrust plate at the other end. Therefore, the pressure will be attenuated due to friction and structural deformation when passing through each plate frame, which means that the filter chamber close to the pressing plate receives the maximum pressure, and the filter chamber far away from the pressing plate receives the minimum pressure. This will result in inconsistent dryness of the same batch of filter cake, affecting the overall filtering effect. In addition, since the pressure is transmitted step by step, it takes a long time, which prolongs the time of sewage sludge extrusion and dewatering. SUMMARY

[0003] The main purpose of the present application is to provide a dewatering and extruding device for sewage sludge treatment, which can effectively solve the technical problems in the background art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A dewatering and extruding device for sewage sludge treatment, comprising a conveying belt for conveying sludge cakes, the conveying belt is provided with uniform pressure driving assemblies on both sides; A plurality of extrusion assemblies are arranged between the two uniform pressure driving assemblies, the extrusion assemblies are used for extruding sludge and guiding the water in the sludge to flow out, and the uniform pressure driving assemblies are used for applying uniform pressure to the plurality of extrusion assemblies; The extrusion assembly comprises an extrusion box; The uniform pressure driving assembly comprises a linkage plate, which is used for uniformly distributing pressure; A plurality of adapter pieces are fixed equidistantly on one side of the linkage plate; A plurality of linkage rods are rotatably connected to the front and rear ends of one side of the adapter piece, and the linkage rods are used for pulling the extrusion box to move; A base is rotatably connected to the end of the linkage rod, and the base is fixedly connected to the back of the extrusion box; A plurality of hydraulic cylinders are equidistantly arranged on the other side of the linkage plate, the piston rod of the hydraulic cylinder is fixedly connected to the linkage plate, and the hydraulic cylinder is used for generating pressure for extruding sludge; A base is fixedly connected to the outside of the hydraulic cylinder body.

[0005] Specifically, it is ensured that the several extrusion boxes are subjected to uniform pressure simultaneously during the extrusion of the sludge, and the sludge at different positions is subjected to extrusion simultaneously, so that the moisture content of the filter cake is reduced, a drier mud cake is obtained, the cost and difficulty of subsequent drying or treatment are reduced, the extrusion time is shortened, the filtration cycle is improved, and the sludge at different positions is not interfered with when being extruded, so that even if the extrusion surface at a certain position fails, it will not affect the completion of the extrusion and dehydration process of the sludge at other positions.

[0006] As a further scheme of the present application, the extrusion assembly further comprises a plurality of porous support plates penetrating through the front box body of the extrusion box and fixedly connected thereto. The insertion slot is provided on the upper and lower ends of the extrusion box, and is located at the front of the porous support plate. The multifilament filter plate frame is inserted into the insertion slot, and is used for filtering water in the sludge during extrusion. The water outlet pipe is fixedly connected to the back of the extrusion box near the bottom of both sides, penetrates through the back box body of the extrusion box, and is used to guide the water filtered out of the sludge during extrusion.

[0007] Specifically, it is convenient for solid-liquid separation, and the water formed after extrusion is prevented from returning to the sludge.

[0008] As a further scheme of the present application, the extrusion assembly further comprises a plate slot provided in the middle of the bottom surface of the extrusion box. The magnetic plate one is fixedly connected to the top of the plate slot. The magnetic plate two is fixedly connected to the middle of the bottom of the multifilament filter plate frame, and is magnetically connected to the magnetic plate one.

[0009] Specifically, the multifilament filter plate frame is prevented from being separated from the extrusion box under the action of gravity, and the replacement of the multifilament filter plate frame after damage of the filter cloth is facilitated.

[0010] As a further scheme of the present application, an auxiliary assembly is provided above the conveying belt, and the auxiliary assembly comprises two oppositely arranged head frames. A plurality of auxiliary extrusion frames are arranged between the two head frames. The slide rod is fixedly connected between the two head frames and near the four corners, and the extrusion box is slidably connected with the slide rod. The butt joint sleeve is fixedly connected to the inner wall of the auxiliary extrusion frame and the head frame and near the four corners, and is fixedly connected with the slide rod.

[0011] Specifically, the water in the sludge will seep out due to extrusion, and the sludge will be gradually compressed into a relatively dry mud cake after water loss.

[0012] As a further scheme of the present application, the auxiliary assembly further comprises an auxiliary backflush pipe for conveying compressed air, and the auxiliary backflush pipe penetrates through the frame body of the head frame and the auxiliary extrusion frame and is fixedly connected thereto. a plurality of air outlet holes are formed through the bottom of the auxiliary backflush pipe; a plurality of elastic gaskets are fixed around the air outlet holes; The extrusion assembly further comprises a second air inlet hole formed in the middle of the top of the extrusion box, and a sealing ring fixed on the top of the extrusion box and located at the front and rear ends of the second air inlet hole.

[0013] Specifically, the multifilament filter frame is easy to clean, and is conducive to the reuse of the multifilament filter frame.

[0014] As a further scheme of the present application, the auxiliary assembly further comprises a frame air bag arranged inside the head frame and the auxiliary extrusion frame, and the frame body of the frame air bag is fixed with the inner walls of the head frame and the auxiliary extrusion frame and the butt joint sleeve. a first air inlet hole is formed through the top frame body in the middle of the frame air bag, and the first air inlet hole is communicated with the inside of the auxiliary backflush pipe through the air outlet hole.

[0015] Specifically, after the frame air bag is inflated, the mud cake is pushed out of the head frame and the auxiliary extrusion frame, which facilitates the unloading of the mud cake and improves the efficiency of the whole sludge dewatering process.

[0016] As a further scheme of the present application, the auxiliary assembly further comprises a sludge conveying pipe arranged above the auxiliary backflush pipe, and the sludge conveying pipe is used for conveying sludge. a plurality of sludge distribution pipes are arranged on both sides of the sludge conveying pipe, and the sludge distribution pipes are used for conveying sludge to the inside of the head frame and the auxiliary extrusion frame. a sludge flow guide groove is formed in the top of the frame body of the frame air bag and located on both sides of the first air inlet hole, the sludge flow guide groove is located directly below the sludge distribution pipe, and the sludge flow guide groove is used for flowing sludge.

[0017] Specifically, the sewage sludge is simultaneously conveyed to each extrusion dewatering point, and the processing efficiency of the whole extrusion dewatering process is improved.

[0018] As a further scheme of the present application, a backflush assembly is arranged in front of the conveying belt, and the backflush assembly comprises a gas conveying pipe. An electromagnetic pressure relief valve is arranged at the front end of the gas conveying pipe. A backflush driving system is arranged at one end of the gas conveying pipe. The other end of the gas conveying pipe is connected with the auxiliary backflush pipe through a flange plate.

[0019] Specifically, when the electromagnetic pressure relief valve is opened, pressure relief is facilitated, and the existing gas in the frame air bag cannot be discharged, which affects the extrusion dewatering process.

[0020] As a further scheme of the present application, the backflush driving system comprises an air tank, an air compressor and a pulse valve.

[0021] Specifically, the pulse valve is started to pump gas into the auxiliary backflushing pipe, so as to provide gas required for backflushing cleaning and backflushing unloading.

[0022] As a further scheme of the present application, the water guide groove is arranged on both sides of the conveying belt, and the water guide groove is fixedly connected with the base and located directly below the water outlet pipe.

[0023] Specifically, the water flows to the outside through the water guide groove 4, facilitating water discharge.

[0024] The present application has the following advantages: The present application has the following advantages:

[0025] The present application provides air required for backflushing cleaning through the backflushing assembly, and the compressed air is delivered to the extrusion box through the auxiliary backflushing pipe, so as to clean the surface of the multifilament filter plate frame through air backflushing, avoid filter hole blockage, and facilitate multifilament filter plate regeneration. The present application provides air required for backflushing unloading through the backflushing assembly, and the compressed air is delivered to the frame type air bag through the auxiliary backflushing pipe, so as to facilitate extrusion of the mud cake from the head frame and the auxiliary extrusion frame after the frame type air bag is inflated, facilitate automatic unloading, reduce the time required for the whole sewage sludge extrusion dehydration, and improve the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of the dehydration extrusion device for sewage sludge treatment. Figure 2 It is a demonstration view of the dehydration extrusion device for sewage sludge treatment in an extrusion state. Figure 3 It is a local structure schematic view of the dehydration extrusion device for sewage sludge treatment. Figure 4 It is a structure schematic view of the pressure equalizing and driving assembly in the dehydration extrusion device for sewage sludge treatment. Figure 5 It is a structure exploded view of the extrusion assembly in the dehydration extrusion device for sewage sludge treatment. Figure 6A zone in the dehydrating and extruding device for sewage sludge treatment Figure 5 Figure 7 The bottom view of the dehydrating and extruding device for sewage sludge treatment Figure 5 Figure 8 The structure diagram of the auxiliary assembly in the dehydrating and extruding device for sewage sludge treatment Figure 9 The bottom view of the dehydrating and extruding device for sewage sludge treatment Figure 8 Figure 10 The B zone in the dehydrating and extruding device for sewage sludge treatment Figure 9 Figure 11 The structure diagram of the auxiliary extruding frame in the dehydrating and extruding device for sewage sludge treatment Figure 12 The structure diagram of the frame type air bag in the dehydrating and extruding device for sewage sludge treatment Figure 13 The structure diagram of the backflush assembly in the dehydrating and extruding device for sewage sludge treatment

[0027] In the figure: 1, uniform pressure driving assembly; 101, linkage plate; 102, hydraulic cylinder; 103, base; 104, adapter; 105, linkage rod; 106, base; 2, auxiliary assembly; 201, head frame; 202, auxiliary extruding frame; 203, sliding rod; 204, frame type air bag; 205, auxiliary backflush pipe; 206, elastic gasket; 207, sludge conveying pipe; 208, sludge distribution pipe; 209, air outlet; 210, sludge guide groove; 211, butt joint sleeve; 212, air inlet one; 3, conveying belt; 4, water guide groove; 5, backflush assembly; 501, air conveying pipe; 502, electromagnetic pressure relief valve; 503, backflush driving system; 6, extruding assembly; 601, extruding box; 602, perforated support plate; 603, water outlet pipe; 604, slot; 605, multifilament filter plate frame; 606, air inlet two; 607, sealing ring; 608, plate groove; 609, magnetic plate one; 610, magnetic plate two. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments. ​​​​

[0029] As Figures 1-13 shown, a dewatering and extruding device for sewage sludge treatment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including a conveyor belt 3 for conveying mud cake, both sides of the conveyor belt 3 are provided with uniform pressure driving assembly 1; A plurality of extrusion assemblies 6 are arranged between the two uniform pressure driving assemblies 1, the extrusion assemblies 6 are used for extruding sludge and guiding water in the sludge to flow out, and the uniform pressure driving assembly 1 is used for applying uniform pressure to the plurality of extrusion assemblies 6; The extrusion assembly 6 comprises an extrusion box 601; The uniform pressure driving assembly 1 comprises a linkage plate 101, which is used for uniformly distributing pressure; A plurality of adapters 104 are fixed equidistantly on one side of the linkage plate 101; A plurality of linkage rods 105 are rotatably connected to the front and rear ends of the adapter 104 on one side, and the linkage rod 105 is used for pulling the extrusion box 601 to move; A base 106 is rotatably connected to the end of the linkage rod 105, and the base 106 is fixedly connected with the back of the extrusion box 601; A plurality of 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 with the linkage plate 101, and the hydraulic cylinder 102 is used for generating pressure for extruding sludge; The base 103 is fixedly connected outside the cylinder body of the hydraulic cylinder 102.

[0030] Specifically, after the sludge is arranged between the two relatively arranged extrusion boxes 601, the hydraulic cylinder 102 is started to drive the linkage plate 101 to move towards the direction of the extrusion box 601, the pressure from the hydraulic cylinder 102 is evenly distributed through the linkage plate 101, and the pressure is evenly applied to the plurality of adapters 104, and then the adapters 104 extrude the linkage rod 105, so that the linkage rod 105 rotates around the base 106 to push the two extrusion boxes 601 arranged back to away from each other, and the two extrusion boxes 601 arranged relatively move close to each other, and then the sludge is extruded by the movement of the extrusion box 601 to extrude the water in the sludge, the pressure is balanced through the linkage plate 101 and applied to the plurality of adapters 104, and then the adapters 104 extrude the extrusion box 601, so that the plurality of extrusion boxes 601 are simultaneously subjected to uniform pressure during the extrusion of the sludge, and the sludge at different positions is simultaneously extruded, thereby reducing the moisture content of the filter cake, obtaining a drier cake, reducing the cost and difficulty of subsequent drying or processing, shortening the extrusion time, improving the filtration cycle, and the sludge at different positions is not interfered with each other when being extruded, so that even if the extrusion surface at a certain position fails, it will not affect the extrusion and dehydration process of the sludge at other positions. After extrusion, the hydraulic cylinder 102 is started again to drive the linkage plate 101 to reset, and the extrusion box 601 is reset through the linkage plate 101 during the resetting process and the linkage rod 105, so as to expose the cake formed after the sludge is extruded, facilitate the cake to complete the unloading and fall on the conveyor belt 3, and then the cake is conveyed to the outside through the conveyor belt 3.

[0031] Please refer to Figure 5 , the extrusion assembly 6 further comprises a plurality of porous support plates 602 penetrating through the front box body of the extrusion box 601 and fixedly connected thereto; The insertion slot 604 is provided on the upper and lower ends of the extrusion box 601, and the insertion slot 604 is located at the front of the plurality of porous support plates 602; The multifilament filter plate frame 605 is inserted into the insertion slot 604, and the multifilament filter plate frame 605 is used for filtering the water in the sludge during the extrusion process; The water outlet pipe 603 is fixedly connected to the back of the extrusion box 601 on both sides of the bottom, the water outlet pipe 603 penetrates through the back box body of the extrusion box 601, and the water outlet pipe 603 is used to guide the filtered water in the sludge to flow out.

[0032] Specifically, when the extrusion box 601 extrudes the sludge, the multifilament filter plate frame 605 is supported by the plurality of porous support plates 602, and the sludge is filtered by the multifilament filter plate frame 605 during the extrusion process. The water in the sludge is sequentially filtered through the filter holes on the multifilament filter plate frame 605 and the plurality of porous support plates 602 and then enters the extrusion box 601, and then is discharged through the water outlet pipe 603, so as to facilitate solid-liquid separation and avoid the water formed after extrusion from returning to the sludge.

[0033] Please refer toFigure 7 The extrusion assembly 6 further comprises a plate slot 608 centrally formed in the bottom surface of the extrusion box 601; A magnetic plate one 609 fixed on the top of the plate slot 608; A magnetic plate two 610 fixed on the bottom of the multifilament filter plate frame 605, and the magnetic plate two 610 is magnetically connected with the magnetic plate one 609.

[0034] Specifically, after the multifilament filter plate frame 605 is inserted into the slot 604, the magnetic plate two 610 is clamped into the plate slot 608 and is attracted to the magnetic plate one 609, so that the multifilament filter plate frame 605 can be prevented from being separated from the extrusion box 601 under the action of gravity. When the filter cloth on the multifilament filter plate frame 605 is damaged, the multifilament filter plate frame 605 is pulled downward to be separated from the slot 604, so that the multifilament filter plate frame 605 can be replaced, facilitating the replacement of the multifilament filter plate frame 605 after the filter cloth is damaged.

[0035] Please refer to Figure 8 and Figure 11 An auxiliary assembly 2 is arranged above the conveying belt 3, and the auxiliary assembly 2 comprises two oppositely arranged head frames 201; A plurality of auxiliary extrusion frames 202 are arranged between the two head frames 201; A slide rod 203 is fixed between the two head frames 201 and near the four corners, and the extrusion box 601 is slidably connected with the slide rod 203; A butt joint sleeve 211 is fixed on the inner wall of the auxiliary extrusion frame 202 and the head frame 201 and near the four corners, and the butt joint sleeve 211 is fixed with the slide rod 203.

[0036] Specifically, when the uniform pressure driving assembly 1 moves, the extrusion box 601 is pulled to slide along the slide rod 203. When the extrusion box 601 slides into the head frame 201 and the auxiliary extrusion frame 202, the mud is extruded due to the movement of the extrusion box 601, and the space where the mud is located gradually decreases due to the blocking of the head frame 201 and the auxiliary extrusion frame 202. Therefore, the water in the mud will seep out due to extrusion, and the mud will be gradually compressed into a relatively dry mud cake after losing water.

[0037] Please refer to Figure 9 and Figure 10 The auxiliary assembly 2 further comprises an auxiliary backflush pipe 205 for conveying compressed air, and the auxiliary backflush pipe 205 penetrates the frame of the head frame 201 and the auxiliary extrusion frame 202 and is fixed with the frame; A plurality of air outlets 209 are formed in the bottom of the auxiliary backflush pipe 205; A resilient gasket 206 is fixed around the air outlet 209; The extrusion assembly 6 further comprises a second air inlet hole 606 arranged in the middle 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 second air inlet hole 606. The extrusion box 601 and the auxiliary extrusion frame 202 are arranged alternately.

[0038] Specifically, after the extrusion and dehydration are completed, the uniform pressure driving assembly 1 drives the extrusion box 601 to reset, so that the second air inlet hole 606 is aligned with the air outlet hole 209. The connection between the second air inlet hole 606 and the air outlet hole 209 is sealed by the elastic gasket 206 in cooperation with the sealing ring 607. The gas in the auxiliary backflushing pipe 205 enters the inside of the extrusion box 601 through the air outlet hole 209 in cooperation with the second air inlet hole 606, and then passes through the porous support plate 602 and the multifilament filter plate frame 605 in turn. In the process of passing through the multifilament filter plate frame 605, the gas forms a backflush, which flushes open the blocked filter holes on the multifilament filter plate frame 605, facilitates the cleaning of the multifilament filter plate frame 605, and is beneficial to the regeneration of the multifilament filter plate frame 605.

[0039] Please refer to Figure 10 and Figure 12 The auxiliary assembly 2 further comprises a frame type air bag 204 arranged in the inside of the head frame 201 and the auxiliary extrusion frame 202. The frame body of the frame type air bag 204 is fixed to the inner wall of the head frame 201 and the auxiliary extrusion frame 202 and the butt joint sleeve 211. A first air inlet hole 212 is arranged in the middle of the frame body of the frame type air bag 204. The first air inlet hole 212 is in communication with the inside of the auxiliary backflushing pipe 205 through the air outlet hole 209.

[0040] Specifically, after the extrusion and dehydration are completed, the gas in the auxiliary backflushing pipe 205 enters the frame type air bag 204 through the air outlet hole 209 in cooperation with the first air inlet hole 212 to inflate the frame type air bag 204. After the frame type air bag 204 is inflated, it bulges to push the mud cake out of the head frame 201 and the auxiliary extrusion frame 202, which facilitates the unloading of the mud cake and improves the efficiency of the whole sludge dehydration process.

[0041] Please refer to Figure 10 and Figure 12 The auxiliary assembly 2 further comprises a sludge conveying pipe 207 arranged above the auxiliary backflushing pipe 205. The sludge conveying pipe 207 is used for conveying sludge. A plurality of sludge distribution pipes 208 are arranged on both sides of the sludge conveying pipe 207. The sludge distribution pipes 208 are used for conveying sludge to the inside of the head frame 201 and the auxiliary extrusion frame 202. A sludge flow guide groove 210 is arranged on the top of the frame body of the frame type air bag 204 and located on both sides of the first air inlet hole 212. The sludge flow guide groove 210 is located directly below the sludge distribution pipes 208. The sludge flow guide groove 210 is used for flowing sludge.

[0042] Specifically, when the sewage sludge is dehydrated, the uniform pressure driving assembly 1 is started to drive the extrusion box 601 to slide along the slide rod 203 by a distance, so that the box body of the extrusion box 601 is immersed into the head frame 201 and the auxiliary extrusion frame 202, and cavities for containing sludge are formed between the extrusion box 601 and the head frame 201 and between the extrusion box 601 and the auxiliary extrusion frame 202. The sludge conveying pipe 207 is connected with the screw pump, the sewage sludge is conveyed into the sludge conveying pipe 207 by the screw pump, and then is conveyed by the sludge distribution pipe 208. When the sludge flows to the sludge guide groove 210, it is guided into the cavities of the head frame 201 and the auxiliary extrusion frame 202 through the sludge guide groove 210, so as to conveniently convey the sewage sludge to each extrusion dehydration point at the same time, and improve the processing efficiency of the entire extrusion dehydration process.

[0043] Please refer to Figure 1 and Figure 13 , the front of the conveying belt 3 is provided with a backflushing assembly 5, the backflushing assembly 5 includes a gas conveying pipe 501; The electromagnetic pressure relief valve 502 is arranged at the front end of the gas conveying pipe 501; The backflushing driving system 503 is arranged at one end of the gas conveying pipe 501; The other end of the gas conveying pipe 501 is connected with the auxiliary backflushing pipe 205 through a flange.

[0044] Specifically, after the backflushing driving system 503 is started, compressed air is conveyed into the gas conveying pipe 501, and then is conveyed into the auxiliary backflushing pipe 205 through the gas conveying pipe 501, so as to provide air required for backflushing cleaning and backflushing unloading. When extrusion dehydration is performed again, the backflushing driving system 503 is closed, and at the same time, the electromagnetic pressure relief valve 502 is opened, so as to relieve pressure and avoid that gas in the frame type air bag 204 cannot be discharged, thereby affecting the extrusion dehydration process.

[0045] The backflushing driving system 503 includes an air tank, an air compressor and a pulse valve.

[0046] Specifically, after the air compressor is operated, air is compressed and stored in the air tank. When backflushing cleaning and backflushing unloading are performed, the pulse valve is started to pump gas into the auxiliary backflushing pipe 205, so as to provide gas required for backflushing cleaning and backflushing unloading.

[0047] Please refer to Figure 1 , the two sides of the conveying belt 3 are provided with water guide grooves 4, the water guide grooves 4 are fixedly connected with the base 103, and the water guide grooves 4 are located directly below the water outlet pipe 603.

[0048] Specifically, water generated in the extrusion dehydration process flows into the water guide groove 4 through the water outlet pipe 603, and then flows to the outside through the water guide groove 4, so as to facilitate the discharge of water.

[0049] Working principle The uniform pressure driving assembly 1 drives the extrusion box 601 to slide along the slide rod 203 for a distance, so that the box body of the extrusion box 601 is immersed into the head frame 201 and the auxiliary extrusion frame 202, and cavities for containing sludge are formed between the extrusion box 601 and the head frame 201 and between the extrusion box 601 and the auxiliary extrusion frame 202. The sewage sludge is simultaneously transported into the cavities at each extrusion dehydration point through the sludge conveying pipe 207 cooperating with the sludge distribution pipe 208. Then the hydraulic cylinder 102 drives the linkage plate 101 to move towards the direction of the extrusion box 601, and the pressure from the hydraulic cylinder 102 is evenly distributed through the linkage plate 101, so that the pressure is uniformly applied to the plurality of adapters 104. Then the adapters 104 extrude the linkage rod 105, so that the linkage rod 105 rotates around the base 106, thereby pushing the extrusion box 601 to move towards the direction of the frame air bag 204, and then the sludge is extruded by the movement of the extrusion box 601, so that the water in the sludge is extruded out. The water extruded out of the sludge enters the extrusion box 601 in sequence through the filter holes on the multifilament filter plate frame 605 and the porous support plate 602, and then is discharged to the waterway 4 through the water outlet pipe 603. The pressure is balanced through the linkage plate 101 and applied to the plurality of adapters 104, and then the adapters 104 extrude the extrusion box 601, so that the plurality of extrusion boxes 601 are simultaneously subjected to uniform pressure during the extrusion of the sludge, and the sludge at different positions is simultaneously extruded, thereby reducing the moisture content of the filter cake, obtaining a drier mud cake, reducing the cost and difficulty of subsequent drying or treatment, shortening the extrusion time, improving the filtration cycle, and the sludge at different positions is not interfered with each other when being extruded. Therefore, even if the extrusion surface at a certain position fails, it will not affect the completion of the extrusion dehydration process of the sludge at other positions. After extrusion, the uniform pressure driving assembly 1 drives the extrusion box 601 to reset, so that the air inlet hole two 606 is aligned with the air outlet hole 209. Then the backflushing assembly 5 is started to deliver compressed air to the auxiliary backflushing pipe 205. The gas in the auxiliary backflushing pipe 205 enters the inside of the frame air bag 204 and the extrusion box 601 through the air outlet hole 209 cooperating with the air inlet hole one 212 and the air inlet hole two 606. After the gas enters the frame air bag 204, the frame air bag 204 inflates and bulges to push the mud cake out of the head frame 201 and the auxiliary extrusion frame 202, so as to facilitate the completion of the unloading of the mud cake, and the fallen mud cake directly falls onto the conveyor belt 3 for conveying to the outside, thereby improving the efficiency of the whole sludge dehydration process. After the gas enters the extrusion box 601, it passes through the porous support plate 602 and the multifilament filter plate frame 605 in sequence. In the process of the gas passing through the multifilament filter plate frame 605, the filter holes on the multifilament filter plate frame 605 are backflushed to be unblocked, thereby facilitating the cleaning of the multifilament filter plate frame 605 and being conducive to the reuse of the multifilament filter plate frame 605.

[0050] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A dewatering and squeezing device for treating sewage sludge, comprising a conveyor belt (3) for conveying mud cakes, characterized in that: Both sides of the conveyor belt (3) are provided with a uniform pressure driving assembly (1); A plurality of extrusion assemblies (6) are provided between the two uniform pressure drive assemblies (1), the extrusion assemblies (6) being used to squeeze the sludge and guide the water in the sludge to flow out, and the uniform pressure drive assembly (1) being used to apply uniform pressure to the plurality of extrusion assemblies (6); The extrusion assembly (6) comprises an extrusion box (601); The uniform pressure driving assembly (1) comprises a linkage plate (101), and the linkage plate (101) is used to uniformly distribute pressure; A plurality of adapters (104) equidistantly fixed to one side of the linkage plate (101); A plurality of linkage rods (105) connected to the front and rear ends of one side of the adapter (104) are rotatably connected, and the linkage rods (105) are used to pull the extrusion box (601) to move; The base (106) connected to the end of the linkage rod (105) is rotated, and the base (106) is fixedly connected to the back of the extrusion box (601); A plurality of hydraulic cylinders (102) are equidistantly arranged on the other side of the linkage plate (101), piston rods of the hydraulic cylinders (102) are fixedly connected to the linkage plate (101), and the hydraulic cylinders (102) are used to generate pressure for squeezing silt; A base (103) is fixedly connected 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) further comprises a porous support plate (602) that penetrates the front box body of the extrusion box (601) and is fixed thereto; A slot (604) is provided through the upper and lower ends of the extrusion box (601), and the slot (604) is located in front of the porous support plate (602); A multifilament filter plate frame (605) inserted into the slot (604), the multifilament filter plate frame (605) is used to filter water in the sludge during the extrusion process; The water outlet pipes (603) are fixedly connected to the bottom of both sides of the back of the squeezing box (601). The water outlet pipes (603) penetrate the back box body of the squeezing box (601). The water outlet pipes (603) are used to guide the water squeezed and filtered in the sludge to flow out.

3. The dewatering and squeezing device for sewage sludge treatment according to claim 1, characterized in that: The extrusion assembly (6) further includes a plate groove (608) provided in the center of the bottom surface of the extrusion box (601); A magnetic plate 1 (609) fixed to the top of the plate slot (608); A second magnetic plate (610) is fixedly connected 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 squeezing device for sewage sludge treatment according to claim 1, characterized in that: An auxiliary component (2) is provided directly above the conveyor belt (3), and the auxiliary component (2) comprises two head frames (201) arranged opposite to each other; A plurality of auxiliary extrusion frames (202) arranged between the two head frames (201); A sliding rod (203) is fixedly connected between the two head frames (201) and close to the four corners, and the extrusion box (601) is slidably connected to the sliding rod (203); The butt joint sleeves (211) are fixedly connected to the inner walls of the auxiliary extrusion frame (202) and the head frame (201) at four corners, and the butt joint sleeves (211) are fixedly connected to the slide rod (203).

5. The dewatering and squeezing device for sewage sludge treatment according to claim 4, characterized in that: The auxiliary component (2) further includes an auxiliary recoil pipe (205), the auxiliary recoil pipe (205) being used to convey compressed air, the auxiliary recoil pipe (205) penetrating the frame of the head frame (201) and the auxiliary extrusion frame (202) and being fixedly connected to the two. A plurality of air outlet holes (209) are provided through the bottom of the auxiliary recoil pipe (205); an elastic gasket (206) fixedly connected to the periphery of the air outlet (209); The extrusion assembly (6) further includes a second air inlet (606) provided in 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 second air inlet (606), and the extrusion box (601) and the auxiliary extrusion frame (202) are arranged alternately.

6. The dewatering and squeezing device for sewage sludge treatment according to claim 4, characterized in that: The auxiliary component (2) further comprises a frame-type airbag (204) arranged inside the head frame (201) and the auxiliary extrusion frame (202); the frame body of the frame-type airbag (204) is fixedly connected to the inner walls of the head frame (201) and the auxiliary extrusion frame (202) and the docking sleeve (211); An air inlet hole (212) is provided in the center of the top frame of the frame-type air bag (204), and the air inlet hole (212) is communicated with the interior of the auxiliary recoil pipe (205) through the air outlet hole (209).

7. The dewatering and squeezing device for sewage sludge treatment according to claim 4, characterized in that: The auxiliary component (2) further comprises a sludge conveying pipe (207) arranged above the auxiliary backwash pipe (205), and the sludge conveying pipe (207) is used to convey sludge; A plurality of sludge distribution pipes (208) are provided on both sides of the sludge delivery pipe (207), and the sludge distribution pipes (208) are used to transport the sludge to the interior of the head frame (201) and the auxiliary extrusion frame (202); A silt guide groove (210) is provided on the top of the frame of the frame-type air bag (204) and is located on both sides of the air inlet hole (212). The silt guide groove (210) is located directly below the silt distribution pipe (208). The silt guide groove (210) is used to circulate silt.

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

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

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

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