Sewage treatment device for coal-based solid waste treatment system

Abstract

The invention belongs to the technical field of polluted sewage treatment, and particularly relates to a sewage treatment device for a coal-based solid waste treatment system, which comprises a treatment kettle, a separation mechanism is rotatably mounted in the treatment kettle, a driving assembly is arranged on the treatment kettle, and a feeding mechanism is arranged between the treatment kettle and the separation mechanism. The feeding mechanism is used for mixing sewage with a separating agent and conveying the mixture into the separating mechanism, the driving assembly is used for stirring the sewage in the separating mechanism to be uniformly mixed with the separating agent and driving the separating mechanism to rotate to perform solid-liquid separation on the sewage mixed with the separating agent, and an extrusion mechanism is arranged on the treatment kettle. The extrusion mechanism is used for extruding the sewage in the centrifugal solid-liquid separation process of the sewage. The stirring and discharging mechanism is driven by the motor, so that a sewage separating agent mixture in the separating mechanism can be driven to be mixed again, and sewage mud cakes dehydrated in the separating mechanism can be discharged under the condition that the stirring and discharging mechanism rotates reversely.

Description

Technical Field

[0001] The present invention relates to the technical field of polluted sewage treatment, and in particular to a sewage treatment device for a coal-based solid waste treatment system. Background Art

[0002] With the rapid development of the coal industry, the treatment of coal-based solid waste (such as coal gangue, fly ash, etc.) has become increasingly prominent. In the process of coal-based solid waste treatment, a large amount of high-concentration sewage is often produced. These sewage contains suspended matter, heavy metal ions, organic pollutants and difficult-to-degrade substances. If directly discharged, it will cause serious harm to the environment. At present, the treatment methods for such sewage mainly include physical precipitation, chemical flocculation, biodegradation, etc., but there are generally problems such as low treatment efficiency, high cost, and high risk of secondary pollution.

[0003] In the chemical flocculation method, chemical separation agents (such as polyaluminum chloride, polyacrylamide, etc.) are widely used in the solid-liquid separation process of sewage. Moreover, for the wastewater generated in the coal-based solid waste treatment process, it is also necessary to remove the heavy metal ions therein. For this purpose, a sewage treatment device for a coal-based solid waste treatment system is proposed. Summary of the Invention

[0004] In order to solve the shortcomings of the prior art, the present invention proposes a sewage treatment device for a coal-based solid waste treatment system.

[0005] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a sewage treatment device for a coal-based solid waste treatment system, comprising a treatment kettle, a separation mechanism rotatably installed in the treatment kettle, a drive assembly on the treatment kettle, a feeding mechanism between the treatment kettle and the separation mechanism, the feeding mechanism being used to mix the sewage with the separation agent and transport the mixture into the separation mechanism, the drive assembly being used to stir the sewage and the separation agent in the separation mechanism to mix them evenly and to drive the separation mechanism to rotate to perform solid-liquid separation on the sewage mixed with the separation agent, an extrusion mechanism being provided on the treatment kettle, the extrusion mechanism being used to squeeze the sewage during the centrifugal solid-liquid separation process of the sewage, a wrapping mechanism being wrapped around the outside of the separation mechanism, the wrapping mechanism being used to prevent the sewage from leaking out when the sewage is mixed with the separation agent in the separation mechanism, an electrolytic cell being provided on the outside of the treatment kettle, and the electrolytic cell being connected to the treatment kettle.

[0006] Preferably, the separation mechanism includes a fixedly connected filter cartridge and a conical filter bucket, the feeding mechanism includes a cylinder fixedly mounted on the top of the filter cartridge, the drive assembly includes a motor fixedly mounted on the top of the processing kettle, the output shaft of the motor extends into the processing kettle and is fixedly mounted with a rotating shaft, a one-way bearing is sleeved on the rotating shaft, and a plurality of cross bars distributed in a circular array are fixedly mounted on the side of the one-way bearing, and the ends of the multiple cross bars away from the one-way bearing are fixedly connected to the inner wall of the cylinder.

[0007] Preferably, the bottom of the treatment kettle is conical, and a drainage pipe and a circular tube 1 are fixedly installed through the bottom of the treatment kettle. The circular tube 1 is coaxially arranged with the treatment kettle, and the drainage pipe is connected to the electrolytic cell. A circular tube 2 is fixedly installed at the center of the bottom circle of the filter cartridge, and the circular tube 2 is rotatably connected to the circular tube 1. A stirring and discharging mechanism is sleeved on the rotating shaft.

[0008] Preferably, the cylinder is provided with a plurality of slurry inlet holes distributed in a circular array, an annular box is rotatably sleeved on the outside of the cylinder, the side of the annular box is fixedly connected to the inner wall of the processing kettle, the inner side of the annular box is opened, the interior of the cylinder is connected to the interior of the annular box through a plurality of slurry inlet holes, a slurry inlet pipe is fixedly installed on the annular box, the slurry inlet pipe passes through the processing kettle and is fixedly connected to the processing kettle, and a medicine inlet pipe is fixedly installed on the slurry inlet pipe.

[0009] Preferably, an annular plate is fixedly mounted on the top of the cylinder, a retaining cylinder is slidably mounted in the cylinder, a plurality of supports distributed at equal intervals are fixedly mounted on the inner wall of the retaining cylinder, and a spring is fixedly mounted between the support and the annular plate.

[0010] Preferably, the extrusion mechanism includes two hydraulic rods that pass through the top of the processing kettle and are fixedly connected to the processing kettle. The piston rod ends of the two hydraulic rods are fixedly installed with the same connecting ring. The bottom of the connecting ring is rotatably installed with a pressure plate, and the pressure plate is slidably connected to the inner wall of the cylinder and the filter cartridge.

[0011] Preferably, the wrapping mechanism includes a plurality of fan-shaped plates 1 wrapped around the outside of the filter cartridge, a fan-shaped plate 2 is fixedly installed on the bottom end of the fan-shaped plate 1, the top of the fan-shaped plate 2 is fitted with the bottom of the conical filter bucket, and two adjacent fan-shaped plates 1 are fitted with the fan-shaped plate 2, and a plurality of linearly distributed springs 3 are fixedly installed on the side of the fan-shaped plate 1 away from the center of the filter cartridge, and the ends of the plurality of springs 3 away from the fan-shaped plate 1 are fixedly connected to the inner wall of the treatment kettle.

[0012] Preferably, the mixing and discharging mechanism includes a circular box slidably mounted on a rotating shaft, an auger is fixedly mounted on the circular box, the top of the circular box is open, a spring 2 is fixedly mounted between the bottom end of the rotating shaft and the inner wall of the bottom of the circular box, a plurality of guide rods distributed in a circular array are fixedly mounted on the inner wall of the circular box, and a plurality of guide grooves matching the plurality of guide rods are provided on the side of the rotating shaft.

[0013] Preferably, a partition is fixedly installed at the bottom end of the circular box, and the partition is slidably connected to the inner wall of the second circular tube. A valve cover is detachably installed on the first circular tube, and a push rod is fixedly installed at the center of the top of the valve cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention drives the stirring and discharging mechanism by a motor, which can not only drive the sewage separation agent mixture in the separation mechanism to be remixed, but also can discharge the sewage mud cake after dehydration in the separation mechanism when the stirring and discharging mechanism rotates in the reverse direction;

[0016] 2. During the process of stirring the sewage separation agent mixture in the separation mechanism, the wrapping mechanism can completely wrap the separation mechanism, so that the sewage separation agent mixture can be completely in the separation mechanism, which is convenient for subsequent mixing. When the subsequent separation mechanism rotates to centrifugally dehydrate the sewage separation agent mixture, the wrapping mechanism can automatically separate from the separation mechanism under the pressure of water. After that, the water can be discharged from the separation mechanism and flow into the electrolytic cell through the drain pipe to electrolytically separate heavy metal ions;

[0017] 3. The extrusion mechanism can not only extrude the sewage separation agent mixture during the dehydration process to accelerate the separation of water, but also scrape the mud cake formed by dehydration from the separation mechanism, and cooperate with the rotating stirring and discharging mechanism to discharge the mud cake, and the whole process is highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a sewage treatment device for a coal-based solid waste treatment system proposed by the present invention;

[0019] Figure 2 This is a partial side cross-sectional view of a sewage treatment device for a coal-based solid waste treatment system proposed by the present invention;

[0020] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A;

[0021] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of part B;

[0022] Figure 5 This is a side sectional view of an extrusion mechanism and a wrapping mechanism in a sewage treatment device for a coal-based solid waste treatment system proposed by the present invention;

[0023] Figure 6 This is a schematic diagram of the partial structure of a driving component in a sewage treatment device for a coal-based solid waste treatment system proposed in the present invention.

[0024] Figure: 1. Processing kettle; 11. Drain pipe; 12. Round pipe 1; 13. Valve cover; 14. Push rod; 2. Separation mechanism; 21. Filter cartridge; 22. Conical filter bucket; 23. Round pipe 2; 3. Feed mechanism; 31. Cylinder; 32. Slurry inlet hole; 33. Ring box; 34. Slurry inlet pipe; 35. Drug inlet pipe; 36. Ring plate; 37. Stop cylinder; 38. Support; 39. Spring 1; 4. Drive assembly; 41 , motor; 42, rotating shaft; 421, guide groove; 43, one-way bearing; 44, cross bar; 45, mixing and discharging mechanism; 451, round box; 452, auger; 453, guide rod; 454, spring 2; 46, partition; 5, extrusion mechanism; 51, pressure plate; 52, hydraulic rod; 53, connecting ring; 6, wrapping mechanism; 61, fan-shaped plate 1; 62, fan-shaped plate 2; 63, spring 3; 7, electrolytic cell. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Please refer to Figures 1-6 The present invention provides a technical solution: a sewage treatment device for a coal-based solid waste treatment system, comprising a treatment kettle 1, a separation mechanism 2 is rotatably installed in the treatment kettle 1, a driving component 4 is provided on the treatment kettle 1, a feeding mechanism 3 is provided between the treatment kettle 1 and the separation mechanism 2, the feeding mechanism 3 is used to mix the sewage with the separation agent and transport the mixture into the separation mechanism 2, the driving component 4 is used to stir the sewage and the separation agent in the separation mechanism 2 to mix them evenly and drive the separation mechanism 2 to rotate to perform solid-liquid separation on the sewage mixed with the separation agent, an extrusion mechanism 5 is provided on the treatment kettle 1, the extrusion mechanism 5 is used to squeeze the sewage during the centrifugal solid-liquid separation process of the sewage, the outer side of the separation mechanism 2 is wrapped with a wrapping mechanism 6, the wrapping mechanism 6 is used to prevent the sewage from leaking when the sewage is mixed with the separation agent in the separation mechanism 2, an electrolytic cell 7 is provided on the outer side of the treatment kettle 1, and the electrolytic cell 7 is connected to the treatment kettle 1.

[0027] Furthermore, the wastewater generated during the treatment of coal-based solid waste contains a large amount of dust, so the wastewater is usually in a turbid muddy state, so it needs to be separated into solid and liquid.

[0028] The separation mechanism 2 includes a fixedly connected filter cartridge 21 and a conical filter bucket 22, the feeding mechanism 3 includes a cylinder 31 fixedly mounted on the top of the filter cartridge 21, the drive assembly 4 includes a motor 41 fixedly mounted on the top of the treatment kettle 1, the output shaft of the motor 41 extends into the treatment kettle 1 and is fixedly mounted with a rotating shaft 42, a one-way bearing 43 is sleeved on the rotating shaft 42, and a plurality of cross bars 44 distributed in a circular array are fixedly mounted on the side of the one-way bearing 43, and the ends of the multiple cross bars 44 away from the one-way bearing 43 are fixedly connected to the inner wall of the cylinder 31.

[0029] The bottom of the treatment kettle 1 is conical, and a drain pipe 11 and a circular pipe 12 are fixedly installed through the bottom of the treatment kettle 1. The circular pipe 12 is coaxially arranged with the treatment kettle 1. The drain pipe 11 is connected to the electrolytic cell 7. A circular pipe 23 is fixedly installed at the center of the bottom circle of the filter cartridge 21. The circular pipe 23 is rotatably connected to the circular pipe 12, and a stirring and discharging mechanism 45 is sleeved on the rotating shaft 42.

[0030] The cylinder 31 is provided with a plurality of slurry inlet holes 32 distributed in a circular array, and an annular box 33 is rotatably sleeved on the outside of the cylinder 31. The side of the annular box 33 is fixedly connected to the inner wall of the treatment kettle 1, and the inner side of the annular box 33 is opened. The interior of the cylinder 31 and the interior of the annular box 33 are connected through the plurality of slurry inlet holes 32. A slurry inlet pipe 34 is fixedly installed on the annular box 33, which passes through the treatment kettle 1 and is fixedly connected to the treatment kettle 1. A medicine inlet pipe 35 is fixedly installed on the slurry inlet pipe 34.

[0031] An annular plate 36 is fixedly installed on the top of the cylinder 31, and a retaining cylinder 37 is slidably installed in the cylinder 31. A plurality of supports 38 distributed at equal intervals are fixedly installed on the inner wall of the retaining cylinder 37, and a spring 39 is fixedly installed between the supports 38 and the annular plate 36.

[0032] Furthermore, when the hydraulic rod 52 is above the multiple slurry inlet holes 32, the multiple springs 39 will be in a compressed state. Thereafter, during the downward movement of the hydraulic rod 52, the blocking cylinder 37 will move downward synchronously with the hydraulic rod 52. Therefore, the blocking cylinder 37 can seal and block the multiple slurry inlet holes 32 during the downward movement. Therefore, during the downward movement of the hydraulic rod 52, the multiple slurry inlet holes 32 are blocked by the blocking cylinder 37. When the hydraulic rod 52 moves down to below the multiple slurry inlet holes 32, the sewage separation agent mixture can be prevented from falling on the top of the hydraulic rod 52.

[0033] The extrusion mechanism 5 includes two hydraulic rods 52 that pass through the top of the processing kettle 1 and are fixedly connected to the processing kettle 1. The piston rod ends of the two hydraulic rods 52 are fixedly installed with the same connecting ring 53. The bottom of the connecting ring 53 is rotatably installed with a pressure plate 51. The pressure plate 51 is slidably connected to the inner wall of the cylinder 31 and the filter cartridge 21.

[0034] The wrapping mechanism 6 includes a plurality of fan-shaped plates 61 wrapped around the outside of the filter cartridge 21, a fan-shaped plate 2 62 is fixedly installed on the bottom end of the fan-shaped plate 1 61, the top of the fan-shaped plate 2 62 is in contact with the bottom of the conical filter bucket 22, and two adjacent fan-shaped plates 1 61 and fan-shaped plate 2 62 are in contact with each other. A plurality of springs 3 63 distributed linearly are fixedly installed on the side of the fan-shaped plate 1 61 away from the center of the filter cartridge 21, and the ends of the plurality of springs 3 63 away from the fan-shaped plate 1 61 are fixedly connected to the inner wall of the treatment kettle 1.

[0035] The mixing and discharging mechanism 45 includes a circular box 451 that is slidably mounted on the rotating shaft 42, and a screw dragon 452 is fixedly mounted on the circular box 451. The top of the circular box 451 is open, and a spring 2 454 is fixedly installed between the bottom end of the rotating shaft 42 and the inner wall of the bottom of the circular box 451. A plurality of guide rods 453 distributed in a circular array are fixedly installed on the inner wall of the circular box 451, and a plurality of guide grooves 421 that are compatible with the plurality of guide rods 453 are opened on the side of the rotating shaft 42.

[0036] A partition 46 is fixedly installed at the bottom end of the circular box 451, and the partition 46 is slidably connected to the inner wall of the circular tube 23. A valve cover 13 is detachably installed on the circular tube 12, and a push rod 14 is fixedly installed at the center of the top of the valve cover 13.

[0037] Furthermore, when the valve cover 13 is installed on the circular pipe 12, the push rod 14 will press against the bottom of the partition 46, thereby blocking the circular pipe 23 through the partition 46, thereby preventing the sewage separation agent mixture in the separation mechanism 2 from being discharged through the circular pipe 23;

[0038] Through the cooperation between the guide groove 421 and the guide rod 453 , the rotating shaft 42 can drive the entire mixing and discharging mechanism 45 to rotate synchronously.

[0039] In this embodiment, when in use, the two hydraulic rods 52 are first fully retracted. At this time, the pressing plate 51 is located above the multiple pulp inlet holes 32. Then, sewage is injected into the annular box 33 through the pulp inlet pipe 34, and the separation agent is injected into the drug inlet pipe 35 at the same time. The sewage mixed with the separation agent enters the annular box 33 and then enters the filter cartridge 21 and the conical filter bucket 22 through the multiple pulp inlet holes 32.

[0040] Then, the motor 41 is started to drive the rotating shaft 42 to rotate clockwise, and the rotating shaft 42 then drives the mixing and discharging mechanism 45 to rotate clockwise. At this time, the mixing and discharging mechanism 45 will drive the sewage separation agent mixture in the filter cartridge 21 and the conical filter bucket 22 to surge and mix from bottom to top. During this process, since the one-way bearing 43 can only transmit in one direction, the multiple cross bars 44 will not drive the separation mechanism 2 to rotate;

[0041] After the sewage separation agent mixture is fully mixed in the separation mechanism 2, the motor 41 can be used to drive the rotating shaft 42 to rotate counterclockwise, and the rotating shaft 42 drives multiple cross bars 44 to rotate synchronously through the one-way bearing 43. The multiple cross bars 44 then drive the entire separation mechanism 2 to rotate through the cylinder 31. During the high-speed rotation of the separation mechanism 2, the water in the sewage separation agent mixture will pass through the filter holes on the filter cartridge 21 and the conical filter bucket 22 under the action of centrifugal force. Under the action of the centrifugal force, the push sector plate 1 61 overcomes the elastic force of the spring 3 63 and moves away from the axis of the filter cartridge 21. The sector plate 1 61 drives the sector plate 2 62 to separate from the conical filter bucket 22. At this time, the water will flow out through the gap between the adjacent sector plates 1 61 and 2 62. The water will then flow into the electrolytic cell 7 through the drain pipe 11 for electrolysis. The electrolytic cell 7 can then be used to electrolyze and separate the heavy metal ions in the water. The water separated by the heavy metals in the electrolytic cell 7 can then be discharged.

[0042] After the separation mechanism 2 rotates for a period of time, the two hydraulic rods 52 are controlled to extend, and the two hydraulic rods 52 push the pressure plate 51 downward. The pressure plate 51 squeezes the sewage separation agent mixture in the separation mechanism 2, thereby promoting the removal of water in the sewage separation agent mixture.

[0043] When the sewage separation agent mixture in the separation mechanism 2 is fully dehydrated, the two hydraulic rods 52 are controlled to continue to push the pressure plate 51 downward, and at the same time, the valve cover 13 is removed from the circular tube 12. Subsequently, during the downward movement of the pressure plate 51, the mud cake attached to the inner wall of the filter cartridge 21 can be scraped off, and the scraped mud cake will be gathered at the bottom center of the conical filter bucket 22. When the pressure plate 51 contacts the top of the round box 451, it will push the entire stirring and discharging mechanism 45 downward. After the partition 46 extends from the circular tube 23, part of the stirring and discharging mechanism 45 will fill the entire circular tube 23. Subsequently, during the counterclockwise rotation of the stirring and discharging mechanism 45 driven by the rotating shaft 42, the mud cake gathered at the center of the conical filter bucket 22 can be transported downward and discharged from the circular tube 23.

[0044] After the pressure plate 51 cannot move downward any more, the two hydraulic rods 52 are controlled to reset. At this time, under the reset of multiple compressed springs 3 63, the fan plate 1 61 and the fan plate 2 62 will be respectively close to the filter cartridge 21 and the conical filter bucket 22, and the adjacent fan plates 1 61 and the adjacent fan plates 2 62 will fit tightly together, so as to completely wrap the separation mechanism 2. At the same time, the valve cover 13 is reinstalled on the circular tube 1 12, and the push rod 14 will push the partition plate 46 upward and reset. Subsequently, when the sewage separation agent mixture enters the separation mechanism 2, it will be completely in the separation mechanism 2. Subsequently, during the rotation of the stirring and discharging mechanism 45, the sewage and the separation agent can be fully mixed.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sewage treatment device for a coal-based solid waste treatment system, comprising a treatment kettle (1), characterized in that: A separation mechanism (2) is rotatably mounted in the treatment kettle (1). A driving assembly (4) is provided on the treatment kettle (1). A feeding mechanism (3) is provided between the treatment kettle (1) and the separation mechanism (2). The feeding mechanism (3) is used to mix the sewage with the separation agent and transport the mixture into the separation mechanism (2). The driving assembly (4) is used to stir the sewage in the separation mechanism (2) and the separation agent for uniform mixing, and to drive the separation mechanism (2) to rotate to perform solid-liquid separation on the sewage mixed with the separation agent. The treatment kettle (1) is provided with an extrusion mechanism (5). The extrusion mechanism (5) is used to squeeze the sewage during the centrifugal solid-liquid separation process. The outer side of the separation mechanism (2) is wrapped with a wrapping mechanism (6). The wrapping mechanism (6) is used to prevent the sewage from leaking out when the sewage is mixed with the separation agent in the separation mechanism (2). An electrolytic cell (7) is provided on the outer side of the treatment kettle (1). The electrolytic cell (7) is connected to the treatment kettle (1).

2. The sewage treatment device for a coal-based solid waste treatment system according to claim 1, characterized in that: The separation mechanism (2) comprises a filter cartridge (21) and a conical filter bucket (22) which are fixedly connected. The feeding mechanism (3) comprises a cylinder (31) fixedly mounted on the top of the filter cartridge (21). The driving assembly (4) comprises a motor (41) fixedly mounted on the top of the treatment kettle (1). The output shaft of the motor (41) extends into the treatment kettle (1) and is fixedly mounted with a rotating shaft (42). A one-way bearing (43) is sleeved on the rotating shaft (42). A plurality of cross bars (44) distributed in a circumferential array are fixedly mounted on the side of the one-way bearing (43). The ends of the plurality of cross bars (44) away from the one-way bearing (43) are fixedly connected to the inner wall of the cylinder (31).

3. The sewage treatment device for a coal-based solid waste treatment system according to claim 2, characterized in that: The bottom of the treatment kettle (1) is conical, and a drainage pipe (11) and a circular pipe (12) are fixedly installed through the bottom of the treatment kettle (1). The circular pipe (12) is coaxially arranged with the treatment kettle (1). The drainage pipe (11) is connected to the electrolytic cell (7). A circular pipe (23) is fixedly installed at the center of the bottom circle of the filter cartridge (21). The circular pipe (23) is rotatably connected to the circular pipe (12). A stirring and discharging mechanism (45) is sleeved on the rotating shaft (42).

4. The sewage treatment device for a coal-based solid waste treatment system according to claim 2, characterized in that: The cylinder (31) is provided with a plurality of pulp inlet holes (32) distributed in a circular array. An annular box (33) is rotatably sleeved on the outer side of the cylinder (31). The side of the annular box (33) is fixedly connected to the inner wall of the processing kettle (1). The inner side of the annular box (33) is open. The interior of the cylinder (31) is connected to the interior of the annular box (33) through the plurality of pulp inlet holes (32). A pulp inlet pipe (34) is fixedly installed on the annular box (33). The pulp inlet pipe (34) passes through the processing kettle (1) and is fixedly connected to the processing kettle (1). A medicine inlet pipe (35) is fixedly installed on the pulp inlet pipe (34).

5. The sewage treatment device for a coal-based solid waste treatment system according to claim 4, characterized in that: An annular plate (36) is fixedly installed on the top of the cylinder (31), a retaining cylinder (37) is slidably installed in the cylinder (31), a plurality of supports (38) distributed at equal intervals are fixedly installed on the inner wall of the retaining cylinder (37), and a spring (39) is fixedly installed between the support (38) and the annular plate (36).

6. The sewage treatment device for a coal-based solid waste treatment system according to claim 2, characterized in that: The squeezing mechanism (5) comprises two hydraulic rods (52) that pass through the top of the processing kettle (1) and are fixedly connected to the processing kettle (1); the piston rod ends of the two hydraulic rods (52) are fixedly mounted with a same connecting ring (53); a pressing plate (51) is rotatably mounted on the bottom of the connecting ring (53); and the pressing plate (51) is slidably connected to the inner wall of the cylinder (31) and the filter cartridge (21).

7. The sewage treatment device for a coal-based solid waste treatment system according to claim 2, characterized in that: The wrapping mechanism (6) includes a plurality of fan-shaped plates (61) wrapped around the outside of the filter cartridge (21), a fan-shaped plate (62) fixedly mounted on the bottom end of the fan-shaped plate (61), the top of the fan-shaped plate (62) fits in contact with the bottom of the conical filter bucket (22), and two adjacent fan-shaped plates (61) and fan-shaped plate (62) fit in contact with each other, a plurality of springs (63) linearly distributed are fixedly mounted on the side of the fan-shaped plate (61) away from the center of the filter cartridge (21), and the ends of the plurality of springs (63) away from the fan-shaped plate (61) are fixedly connected to the inner wall of the treatment kettle (1).

8. The sewage treatment device for a coal-based solid waste treatment system according to claim 3, characterized in that: The mixing and discharging mechanism (45) comprises a circular box (451) slidably sleeved on the rotating shaft (42), an auger (452) fixedly sleeved on the circular box (451), the top of the circular box (451) is open, a second spring (454) is fixedly installed between the bottom end of the rotating shaft (42) and the inner wall of the bottom of the circular box (451), a plurality of guide rods (453) distributed in a circumferential array are fixedly installed on the inner wall of the circular box (451), and a plurality of guide grooves (421) adapted to the plurality of guide rods (453) are opened on the side of the rotating shaft (42).

9. The sewage treatment device for a coal-based solid waste treatment system according to claim 8, characterized in that: A partition (46) is fixedly installed at the bottom end of the circular box (451), and the partition (46) is slidably connected to the inner wall of the second circular tube (23). A valve cover (13) is detachably installed on the first circular tube (12), and a push rod (14) is fixedly installed at the center of the top of the valve cover (13).

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