A flat sludge dewatering machine

Abstract

The present invention discloses a flat-plate sludge dewatering machine, comprising a dewatering box, a temporary liquid storage chamber provided on one side of the dewatering box, a mud cake funnel provided on the other side of the dewatering box, a solid-liquid separation device provided in the dewatering box, the solid-liquid separation device comprising a solid-liquid separation component and a sludge pushing mechanism, the solid-liquid separation component comprising a plurality of steel plates, a flow channel provided between two adjacent steel plates, the sludge pushing mechanism comprising a plurality of groups of sludge pushing components and a driving mechanism for driving the plurality of groups of sludge pushing components to operate synchronously, each group of sludge pushing components comprising a sludge transmission shaft rotatably connected to the dewatering box and a plurality of elliptical stainless steel rotating plates, the elliptical stainless steel rotating plates rotatably plugged into the flow channel, the groups of sludge pushing components rotating in an interlaced manner to form a wave-shaped pushing mechanism, and a heating wire provided in each steel plate. The present invention is compact in size and can heat and melt solidified grease, facilitating the subsequent oil-water separation of the melted grease and completely recovering the grease.

Description

Technical Field

[0001] The invention belongs to the technical field related to solid-liquid separation in environmental protection equipment, and in particular relates to a flat-plate sludge dewatering machine. Background Art

[0002] Sludge is the inevitable product of sewage treatment in sewage treatment plants and sewage stations. If the sludge is not properly treated and disposed of, it will directly cause secondary pollution to the water and the atmosphere after entering the environment, and will also pose a serious threat to the ecological environment and human activities. Therefore, sludge treatment is very cautious. Sludge treatment can be divided into two processes: sludge dewatering process and sludge drying process.

[0003] With the rapid development of science and technology, sludge dewatering machines have also been technically improved. At present, there are many types of sludge dewatering machines used in my country, and the main ones are spiral sheet extrusion for dehydration treatment, namely, spiral stacking machines. Considering that the spiral stacking machine occupies a large area and has a very small processing capacity, it has relatively high energy consumption, large size, and high noise. At the same time, when the spiral stacking machine is used to treat sludge containing grease, solidified grease is likely to remain on the surface of the spiral sheet after long-term use, which can easily affect the cleaning effect. Moreover, after the sludge after solid-liquid separation is transmitted, if solidified grease remains in the sludge, it can easily affect the later cleaning effect of the sludge. Because the cleaning of solidified grease is relatively inconvenient, if the sludge agglomerates or the grease agglomerates block the filter gap, it is necessary to disassemble the spiral static and dynamic sheets, and the maintenance is time-consuming and labor-intensive, so it needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a flat-plate sludge dewatering machine, which solves the problems of high energy consumption, large volume, high noise and small processing capacity of existing spiral stackers in treating sludge. At the same time, when the spiral stacker treats sludge containing grease, solidified grease is likely to remain on the surface of the spiral blades after long-term use, which easily affects the cleaning effect. Moreover, if solidified grease remains in the sludge after solid-liquid separation, the grease cannot be completely recovered and can only be treated as solid waste.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a flat-plate sludge dewatering machine, comprising a dewatering box, a temporary liquid storage chamber is provided on one side of the dewatering box, an overflow notch is provided on the side of the temporary liquid storage chamber for overflowing sewage into the dewatering box, a mud cake funnel is provided on the side of the dewatering box away from the temporary liquid storage chamber, a solid-liquid separation device is provided in the dewatering box for isolating the dewatering box into an upper and lower layer, the solid-liquid separation device comprises a solid-liquid separation component and a sludge pushing mechanism arranged in the solid-liquid separation component, the solid-liquid separation component comprises one or more steel sheets extending along the length direction of the dewatering box, and a flow passage communicating with the lower layer of the dewatering box is provided between two adjacent steel sheets. The sludge pushing mechanism includes more than one group of sludge pushing components and a driving mechanism that drives multiple groups of sludge pushing components to work synchronously. Each group of sludge pushing components includes a sludge transmission shaft rotatably connected to the dewatering box and more than one elliptical stainless steel rotating plate that is spaced apart and sleeved on the sludge transmission shaft. Each elliptical stainless steel rotating plate is rotatably inserted into a corresponding flow channel. The groups of sludge pushing components rotate alternately to form a wave-shaped pushing mechanism, and the pushing direction of the pushing mechanism is from the overflow notch to the mud cake funnel. A heating wire for heating the steel sheet is provided in each steel sheet.

[0007] Preferably, in order to ensure a better solid-liquid separation effect, the width of the gap between the two side surfaces of each elliptical stainless steel rotating plate and a corresponding flow channel is 0.1-0.3 mm.

[0008] Preferably, in order to facilitate transmission and make the structure simpler, an electric control room is provided in front of the dehydration box, and a cabinet door is hinged on the side of the electric control room. The driving mechanism is placed in the electric control room. The driving mechanism includes a reduction motor, a transmission main shaft, a transmission main gear 1, a synchronous gear 1, and a chain 1. The output shaft of the reduction motor is connected to the transmission main shaft rotatably connected to the dehydration box. The transmission main gear 1 is fixed on the end of the transmission main shaft close to the servo motor. A controller and several synchronous gears 1 are provided in the electric control room. After one end of the sludge transmission shaft is inserted into the electric control room, a transmission auxiliary gear 1 is connected. A closed-loop chain 1 is engaged between all the transmission auxiliary gears 1, the synchronous gear 1, and the transmission main gear 1. The controller is electrically connected to the reduction motor.

[0009] Preferably, in order to play a guiding role, two guide wheels 1 are further provided in the electric control room, and the chain 1 is rotatably connected to the guide wheel 1.

[0010] Preferably, in order to make the transmission method more stable, a transmission main gear 2 is fixed on the end of the transmission main shaft away from the servo motor, and the transmission main gear 2 is located on the back of the dewatering box. The other end of each sludge transmission shaft passes through the back of the dewatering box and is connected to a transmission auxiliary gear 2. Several synchronous gears 2 and guide wheels 2 are also rotatably connected on the back of the dewatering box. A closed-loop chain 2 is engaged between all the transmission auxiliary gears 2, synchronous gears 2, and transmission main gears 2.

[0011] Preferably, in order to improve the sealing performance, the transmission main shaft is outer-connected with two transmission bearings, which are arranged at the connection between the dehydration box and the transmission main shaft, and a sealing ring is provided outside the transmission bearing, the surface of which is against the inner wall of the connection hole on the dehydration box.

[0012] Preferably, in order to achieve automatic temperature control, each steel sheet has a double-layer structure, and the heating wire and the temperature sensor extending along the length direction of the steel sheet are embedded inside the steel sheet, and the temperature sensor and the heating wire are electrically connected to the controller.

[0013] Preferably, in order to have a squeezing effect on the transported sludge, ensure that the sludge has less moisture and is compacted, an inclined cover plate is provided on the upper layer of the dewatering box relative to the top of the solid-liquid separation device, and the high end of the cover plate is hinged to the dewatering box through a rotating shaft, and the low end of the cover plate is close to the mud cake funnel.

[0014] Preferably, in order to facilitate operation, a T-shaped pull ring is provided on the top of the cover plate, and a triangular pressure strip is provided at the lower end of the cover plate.

[0015] Preferably, in order to facilitate opening the cabinet door, a handle is provided on the outer side of the cabinet door.

[0016] The present invention has the following beneficial effects:

[0017] 1. Simply by using multiple steel plates and setting up multiple sets of sludge pushing mechanisms between the steel plates to rotate synchronously, it is possible to ensure that the sludge can be transported quickly and prevent the sludge from falling into the bottom of the dewatering box;

[0018] 2. The overall structure is simpler and has relatively fewer parts, so the overall volume can be made smaller. Under the condition of the same processing capacity, the space occupied by the flat plate sludge dewatering machine is one fiftieth of that of the screw press;

[0019] 3. At the same time, the solidified grease in the sludge can be heated and melted and then enter the lower layer of the dehydration tank, and finally can enter the subsequent processing process (oil-water separation), further improving the filtration effect of sludge and liquid, and realizing complete recovery of grease. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a flat-plate sludge dewatering machine in Example 1;

[0021] Figure 2 for Figure 1 A magnified view of point A;

[0022] Figure 3 This is a front view of a flat-plate sludge dewatering machine in Example 1 without a cabinet door installed;

[0023] Figure 4 This is a schematic diagram of the back of a flat-plate sludge dewatering machine in Example 1;

[0024] Figure 5 This is a schematic diagram of the connection structure between the reduction motor and the transmission main shaft, the sealing ring and the bearing in Example 1;

[0025] Figure 6 This is a schematic structural diagram of one of the sludge pushing components in Example 1;

[0026] Figure 7 Schematic diagram of the structure of the solid-liquid separation component in Example 1;

[0027] Figure 8 This is an internal cross-sectional view of a steel sheet in Example 1;

[0028] Figure 9 This is a front reference schematic diagram of the combination of the steel sheet and each sludge pushing component in Example 1;

[0029] Figure 10 This is a schematic top view of the structure of the combination of two steel sheets and an elliptical stainless steel rotating sheet in Example 1;

[0030] Figure 11 for Figure 10 Enlarged view of point C in the figure;

[0031] Figure 12 This is a schematic diagram of the three-dimensional structure of a flat-plate sludge dewatering machine in Example 2;

[0032] Figure 13 This is a schematic diagram of the three-dimensional structure of a flat-plate sludge dewatering machine in Example 2;

[0033] Figure 14 for Figure 13 Enlarged view of point B.

[0034] Reference numerals:

[0035] Dehydration tank 1, temporary liquid storage chamber 2, overflow notch 3, mud cake funnel 4, solid-liquid separation component 5, steel sheet 501, mounting through hole 502, flow channel 6, sludge pushing component 7, sludge transmission shaft 701, elliptical stainless steel rotating plate 702, heating wire 8, electric control room 9, reduction motor 10, transmission main shaft 11, transmission main gear 12, synchronous gear 13, chain 14, transmission auxiliary gear 15, controller 16, cabinet door 17, guide wheel 18, transmission main gear 2 19, transmission auxiliary gear 2 20, synchronous gear 2 21, guide wheel 2 22, chain 2 23, transmission bearing 24, sealing ring 25, temperature sensor 26, cover 27, rotating shaft 28, T-shaped pull ring 29, triangular pressure strip 30, handle 31, positioning long pin 32. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] See also Figure 1-9 As shown, a flat-plate sludge dewatering machine disclosed in this embodiment includes a dewatering box 1, a temporary liquid storage chamber 2 is provided on one side of the dewatering box 1, an overflow notch 3 is provided on the side of the temporary liquid storage chamber 2 for overflowing sewage into the dewatering box 1, a mud cake funnel 4 is provided on the side of the dewatering box 1 away from the temporary liquid storage chamber 2, and a solid-liquid separation device is provided in the dewatering box 1 to separate the dewatering box 1 into two layers, the solid-liquid separation device includes a solid-liquid separation component 5 and a sludge pushing mechanism arranged in the solid-liquid separation component 5, the solid-liquid separation component 5 includes more than one steel sheet 501 extending along the length direction of the dewatering box 1, and a flow channel connected to the lower layer of the dewatering box 1 is provided between two adjacent steel sheets 501. Road 6, the sludge pushing mechanism includes more than one group of sludge pushing components 7 and a driving mechanism that drives multiple groups of sludge pushing components 7 to work synchronously, each group of sludge pushing components 7 includes a sludge transmission shaft 701 rotatably connected to the dewatering box 1 and more than one elliptical stainless steel rotating piece 702 that is spaced apart and sleeved on the sludge transmission shaft 701, each elliptical stainless steel rotating piece 702 is rotatably inserted into a corresponding flow channel 6, and each group of sludge pushing components 7 rotates alternately to form a wave-shaped pushing mechanism, and the pushing direction of the pushing mechanism is from the overflow notch 3 to the mud cake funnel 4, and a heating wire 8 for heating the steel sheet 501 is provided in each steel sheet 501.

[0039] In this embodiment, each steel sheet 501 is provided with two mounting through holes 502. After aligning the mounting through holes 502 on the required number of steel sheets 501 in the later stage, two positioning long pins 32 are first passed through one side of the dehydration box 1, and then passed through the mounting through holes 502 of each steel sheet 501 in turn and locked with the other side of the dehydration box 1 to achieve the fixation of all steel sheets 501. It is also convenient to disassemble the steel sheet 501 in the later stage. In order to facilitate the passage of the sludge transmission shaft 701, a perforation is also provided at the corresponding position of each steel sheet 501. Figure 7 shown.

[0040] like Figure 10-11 As shown, preferably, in order to ensure better solid-liquid separation effect, the gap width between the two side surfaces of each elliptical stainless steel rotating sheet 702 and a corresponding flow channel 6 is 0.1-0.3 mm. In this embodiment, the distance H11 mm between the steel sheets 501 and 501, and the width H2 of the elliptical stainless steel rotating sheet 702 is 0.5 mm. Therefore, the calculation formula of the filtration accuracy H3 (that is, the gap width between the two side surfaces of each elliptical stainless steel rotating sheet 702 and a corresponding flow channel 6) is as follows: H3 = (H1-H2) / 2 = 0.25 mm.

[0041] like Figure 3-Figure 6As shown, preferably, in order to facilitate transmission and simplify the structure, an electric control room 9 is provided in front of the dehydration box 1, and a cabinet door 17 is hinged on the side of the electric control room 9. The driving mechanism is placed in the electric control room 9, and the driving mechanism includes a reduction motor 10, a transmission main shaft 11, a transmission main gear 12, a synchronous gear 13, and a chain 14. The output shaft of the reduction motor 10 is connected to the transmission main shaft 11 rotatably connected to the dehydration box 1, and the transmission main gear 12 is fixed on the end of the transmission main shaft 11 relative to the servo motor. A controller 16 and several synchronous gears 13 are provided in the electric control room 9. In this embodiment, there are two synchronous gears 13, which are distributed on the left and right. One end of the sludge transmission shaft 701 is inserted into the electric control room 9 and is connected to a transmission auxiliary gear 15 , a closed-loop chain 14 is engaged between all the transmission auxiliary gears 15, the synchronous gear 13, and the transmission main gear 12, and the controller 16 is electrically connected to the reduction motor 10; when working, the reduction motor 10 works to drive the transmission main shaft 11 to rotate, driving the transmission main gear 12 to rotate, and under the action of the chain 14, the synchronous gear 13 finally drives each transmission auxiliary gear 15 to rotate synchronously, and finally drives all the sludge transmission shafts 701 to rotate synchronously, thereby driving the elliptical stainless steel rotating piece 702 on the sludge transmission shaft 701 to rotate synchronously, and it should be noted that the spacing between two adjacent elliptical stainless steel rotating pieces 702 on a sludge transmission shaft 701 needs to ensure that the steel sheet 501 can be inserted, so as to realize a structure in which a steel sheet 501 is inserted between each two adjacent elliptical stainless steel rotating pieces 702.

[0042] In order to play a guiding role, two guide wheels 18 are also provided in the electric control room 9, and the chain 14 is rotatably connected to the guide wheel 18; in order to make the transmission method more stable, a transmission main gear 2 19 is fixed on the end of the transmission main shaft 11 away from the servo motor, and the transmission main gear 2 19 is located on the back of the dehydration box 1, and the other end of each sludge transmission shaft 701 passes through the back of the dehydration box 1 and is connected to a transmission auxiliary gear 2 20. A number of synchronous gears 21 and guide wheels 2 22 are also rotatably connected on the back of the dehydration box 1. In this embodiment, there are two synchronous gears 21, which are distributed on the left and right, and the guide wheels 2 2 2 is also two, and is distributed left and right, and a closed-loop chain 23 is engaged between all the transmission auxiliary gears 20, the synchronous gear 21, and the transmission main gear 2 19; by setting a transmission group with the same structure as that in the electric control room 9 behind the dehydration box 1, the transmission group is composed of the transmission auxiliary gear 20, several step gears 21 and guide wheels 22 set on each sludge transmission shaft 701, the transmission main gear 2 19 set on the other end of the transmission main shaft 11 and a closed-loop chain 23. It is ensured that when the output shaft of the reduction motor 10 drives the transmission main shaft 11 to work, the transmission groups on both sides rotate synchronously, thereby ensuring the stability of the rotation of several sludge pushing components 7.

[0043] In order to improve the sealing performance, two transmission bearings 24 are connected to the outer surface of the transmission shaft 11. The transmission bearings 24 are arranged at the connection between the dehydration box 1 and the transmission shaft 11, and a sealing ring 25 is provided on the outside of the transmission bearing 24, whose surface is against the inner wall of the connecting hole on the dehydration box 1. In this embodiment, since the transmission shaft 11 needs to pass through the front and back of the dehydration box 1 in sequence, connecting holes are provided at the corresponding positions of the front and back of the dehydration box 1 to facilitate the passage of the transmission shaft 11. The connecting holes are provided to avoid affecting the sealing performance of the dehydration box 1. Therefore, two transmission bearings 24 are connected to the outer surface of the transmission shaft 11, that is, to ensure the flexibility of the rotation of the transmission shaft 11. At the same time, the transmission bearings 24 are provided in the connecting holes at the corresponding positions of the front and back of the dehydration box 1, and the sealing performance is improved by adding a sealing ring 25 on the outside of the transmission bearing 24.

[0044] like Figure 7-Figure 8As shown, as a preference, in order to achieve automatic temperature control, each steel sheet 501 is a double-layer structure, and the heating wire 8 and the temperature sensor 26 extending along the length direction of the steel sheet 501 are embedded in the steel sheet 501. The temperature sensor 26 and the heating wire 8 are both electrically connected to the controller 16. In this embodiment, when working, by presetting the final temperature requirement of the steel sheet 501, when working, since the heating wire 8 is inserted into the steel sheet 501, the heating wire 8 is used to heat the steel sheet 501, and then the temperature sensor 26 is used to detect in real time whether the temperature of the steel sheet 501 reaches the preset temperature requirement. If the temperature reaches the preset requirement, the controller 16 controls the heating wire 8 in the corresponding steel sheet 501 to stop working. At this time, since the temperature of the steel sheet 501 is heated, the solidified grease in the solid residue can be heated and melted and enter the lower layer of the dehydration box 1, and finally can enter the subsequent processing step (oil-water separation) instead of directly entering the garbage bin, affecting the cleaning of the garbage bin in the later stage; to avoid the need for further processing of the mixed sludge in the later stage due to the mixing of the solidified grease with the sludge, which affects the treatment effect of the sludge in the later stage, so in this embodiment, the role of the steel sheet is as follows:

[0045] 1. The role of the interval arrangement of multiple steel sheets 501 is to separate solid and liquid;

[0046] 2. At the same time, the steel sheet 501 with the heating wire 8 can also heat the solid residue, so that the solidified grease in the solid residue is heated and melted and enters the subsequent processing process (oil-water separation), instead of directly entering the trash can, affecting the later cleaning of the trash can.

[0047] Preferably, in order to facilitate opening of the cabinet door, a handle 31 is provided on the outer side of the cabinet door 17 , and the handle 31 facilitates the subsequent opening operation of the cabinet door 17 .

[0048] The specific working principle of this structure is as follows: when working, the sludge to be filtered is pumped into the temporary liquid storage chamber 2 through the sewage pump, and overflows into the dehydration box 1 through the overflow gap 3 to achieve early buffering. Then the liquid in the sludge flows into the lower layer of the dehydration box 1 through the flow channel 6 between the two steel plates 501. At this time, due to the synchronous rotation of multiple groups of sludge pushing mechanisms, the sludge is slowly transported from the temporary liquid storage chamber 2 to the mud cake funnel 4. During the transportation process, due to the action of the heating wire 8, the solidified oil in the sludge is heated and melted and also enters the lower layer of the dehydration box 1, and finally it is convenient to enter the subsequent processing process (oil-water separation) instead of directly passing through The mud cake funnel 4 and the filter are simply achieved by using multiple steel plates 501 and arranging multiple groups of sludge pushing mechanisms between the steel plates to rotate synchronously, which ensures that the sludge can be transported quickly and prevents the sludge from falling into the bottom of the dehydration box 1; the overall structure is simpler and has relatively fewer components, so the overall volume can be made smaller. Under the conditions of the same processing capacity, the space occupied by the flat-plate sludge dewatering machine is one-fiftieth of that of the screw press; at the same time, the solidified grease in the sludge can be heated and melted and then enter the lower layer of the dehydration box 1, and finally it can be conveniently entered into the subsequent processing process (oil-water separation), further improving the filtering effect of sludge and liquid, and realizing complete recovery of grease.

[0049] In this embodiment, the size of the entire dehydration box 1 can be 0.87*0.43*0.38 (unit: m) in length, width and height, making the overall volume smaller and the processing capacity can reach 20 tons per hour. At the same time, only a 90-watt reduction motor 10 is used, so the power consumption is relatively lower; while the ordinary screw stacking machine consumes several kilowatts of energy.

[0050] In this embodiment, there are 6 groups of sludge pushing components 7 to ensure more compact transmission. In addition, in this embodiment, due to the simple structure, the gap width between the two side surfaces of each elliptical stainless steel rotating plate 702 and the corresponding flow channel 6 can be set within 0.1-0.3mm, ultimately ensuring that the filtration accuracy can be controlled within 0.2mm, making the effluent water quality more stable and the solid-liquid separation effect better. In addition, multiple groups of sludge pushing components 7 use a reduction motor 10 to cooperate with the transmission main shaft 11, the transmission main gear 12, the transmission auxiliary gear 15 and the chain 1 to ensure synchronization and coordination between the elliptical stainless steel rotating plates 702 to prevent solid residue from passing through the gap and falling to the lower part and affecting the subsequent liquid cleaning effect.

[0051] Example 2

[0052] See also Figure 12As shown, the general structure of a flat-plate sludge dewatering machine disclosed in this embodiment is the same as that of Example 1, except that, as a preference, in order to be able to have a squeezing effect on the transmitted sludge, ensure that the sludge has less moisture and is compacted, an inclined cover plate 27 is provided on the upper layer of the dewatering box 1 relative to the top of the solid-liquid separation device, and the high end of the cover plate 27 is hinged to the dewatering box 1 through a rotating shaft 28, and the low end of the cover plate 27 is close to the mud cake funnel 4. In this embodiment, an inclined cover plate 27 is added above the solid-liquid separation device to press the sludge pushed by the sludge pushing assembly 7, so as to crush the sludge to further improve the solid-liquid separation effect and ensure that the sludge discharged to the mud cake funnel 4 later is free of moisture; therefore, the function of the cover plate 27 is to have a squeezing effect on the transmitted sludge, ensure that the sludge has less moisture and is compacted, and the closer the cover plate 27 is to the mud cake funnel 4, the smaller the distance from the solid-liquid separation device, so that the output sludge is compacted more firmly.

[0053] Example 3

[0054] See also Figure 13-14 As shown, the general structure of a flat-plate sludge dewatering machine disclosed in this embodiment is the same as that of Example 1, except that, as a preference, for the convenience of operation, a T-shaped pull ring 29 is provided above the cover plate 27, and a triangular pressure strip 30 is provided at the lower end of the cover plate 27. By providing the T-shaped pull ring 29, it is convenient to open the entire cover plate 27 by hand later, exposing the solid-liquid separation device below, and facilitating the cleaning of the flow channel 6 in the solid-liquid separation device and the upper surface of the steel sheet 501. Moreover, since the lower end of the cover plate 27 close to the mud cake funnel 4 is provided with a triangular pressure strip 30, it is ensured that when the sludge approaches the mud cake funnel 4, the sludge conveying channel is expanded from the original small spacing to a relatively large spacing, thereby further improving the discharge efficiency of the sludge in the later stage.

[0055] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions described in the aforementioned embodiments, any equivalent replacement of some of the technical features therein, and any modification, equivalent replacement, and improvement made are within the scope of protection of the present invention.

Claims

1. A flat-plate sludge dewatering machine, comprising a dewatering tank (1), characterized in that: A temporary liquid storage chamber (2) is provided on one side of the dewatering box (1), and an overflow notch (3) for overflowing sewage into the dewatering box (1) is provided on the side of the temporary liquid storage chamber (2). A mud cake funnel (4) is provided on the side of the dewatering box (1) away from the temporary liquid storage chamber (2). A solid-liquid separation device is provided in the dewatering box (1) to separate the dewatering box (1) into two layers, the solid-liquid separation device includes a solid-liquid separation component (5) and a sludge pushing mechanism provided in the solid-liquid separation component (5). The solid-liquid separation component (5) includes one or more steel sheets (501) extending along the length direction of the dewatering box (1), and a flow channel (6) communicating with the lower layer of the dewatering box (1) is provided between two adjacent steel sheets (501). The sludge pushing mechanism includes one or more A sludge pushing assembly (7) and a driving mechanism for driving multiple groups of sludge pushing assemblies (7) to work synchronously, wherein the driving mechanism includes a reduction motor (10), each group of sludge pushing assemblies (7) includes a sludge transmission shaft (701) rotatably connected to the dewatering box (1) and more than one elliptical stainless steel rotating piece (702) spaced apart and sleeved on the sludge transmission shaft (701), each elliptical stainless steel rotating piece (702) is rotatably plugged into a corresponding flow channel (6), and each group of sludge pushing assemblies (7) rotates alternately to form a wave-shaped pushing mechanism, and the pushing direction of the pushing mechanism is from the overflow notch (3) to the mud cake funnel (4), and a heating wire (8) for heating the steel sheet (501) is provided in each steel sheet (501).

2. A flat-plate sludge dewatering machine according to claim 1, characterized in that: The gap width between the two side surfaces of each elliptical stainless steel rotating plate (702) and a corresponding flow channel (6) is 0.1-0.3 mm.

3. The flat-plate sludge dewatering machine according to claim 1, characterized in that: An electric control room (9) is provided in front of the dehydration box (1), and a cabinet door (17) is hinged on the side of the electric control room (9). The driving mechanism is placed in the electric control room (9), and the driving mechanism also includes a transmission main shaft (11), a transmission main gear (12), a synchronous gear (13), and a chain (14). The output shaft of the reduction motor (10) is connected to the transmission main shaft (11) rotatably connected to the dehydration box (1). The transmission main shaft (11) is fixed relative to the end of the servo motor. The transmission main gear 1 (12) is fixed, the electric control room (9) is provided with a controller (16) and a plurality of the synchronous gears 1 (13), one end of the sludge transmission shaft (701) is inserted into the electric control room (9) and connected to a transmission auxiliary gear 1 (15), all the transmission auxiliary gears 1 (15), the synchronous gear 1 (13) and the transmission main gear 1 (12) are meshed with a closed-loop chain 1 (14), and the controller (16) is electrically connected to the reduction motor (10).

4. A flat-plate sludge dewatering machine according to claim 3, characterized in that: Two guide wheels (18) are also provided in the electric control room (9), and the chain (14) is rotatably connected to the guide wheel (18).

5. The flat-plate sludge dewatering machine according to claim 4, characterized in that: A transmission main gear 2 (19) is fixed on the end of the transmission main shaft (11) away from the servo motor. The transmission main gear 2 (19) is located on the back of the dewatering box (1). The other end of each sludge transmission shaft (701) passes through the back of the dewatering box (1) and is connected to a transmission auxiliary gear 2 (20). A plurality of synchronous gears 2 (21) and guide wheels 2 (22) are also rotatably connected to the back of the dewatering box (1). A closed-loop chain 2 (23) is engaged between all the transmission auxiliary gears 2 (20), the synchronous gears 2 (21) and the transmission main gear 2 (19).

6. The flat-plate sludge dewatering machine according to claim 5, characterized in that: The transmission main shaft (11) is outer-connected with two transmission bearings (24), and the transmission bearings (24) are arranged at the connection between the dehydration box (1) and the transmission main shaft (11), and a sealing ring (25) is provided on the outside of the transmission bearing (24), the surface of which abuts against the inner wall of the connection hole on the dehydration box (1).

7. A flat-plate sludge dewatering machine according to claim 3, characterized in that: Each steel sheet (501) has a double-layer structure, and the heating wire (8) and the temperature sensor (26) extending along the length direction of the steel sheet (501) are embedded inside the steel sheet (501). The temperature sensor (26) and the heating wire (8) are both electrically connected to the controller (16).

8. A flat-plate sludge dewatering machine according to claim 1, 2, 3 or 4, characterized in that: The upper layer of the dehydration box (1) is provided with an inclined cover plate (27) above the solid-liquid separation device. The upper end of the cover plate (27) is hinged to the dehydration box (1) through a rotating shaft (28), and the lower end of the cover plate (27) is close to the mud cake funnel (4).

9. The flat-plate sludge dewatering machine according to claim 8, characterized in that: A T-shaped pull ring (29) is provided above the cover plate (27), and a triangular pressure strip (30) is provided at the lower end of the cover plate (27).

10. The flat-plate sludge dewatering machine according to claim 3, characterized in that: A handle (31) is provided on the outer side of the cabinet door (17).

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