A mine water treatment system

Abstract

This invention discloses a mine water treatment system, including an aeration and equalization tank for storing mine water. The aeration and equalization tank uses a high-density booster pump to transport the mine water to a high-density tank for concentration and sedimentation. The supernatant in the upper part of the inclined tube sedimentation zone of the high-density tank overflows to a V-type filter for treatment. The sediment at the bottom of the inclined tube sedimentation zone is transported to a sludge tank by a sludge discharge pump. This invention installs a sludge separator on the outlet pipe of the feed pump of the sludge tank for mine water pretreatment. Multiple large-volume squeeze filter boxes that can be squeezed and overturned are hinged to the outside of the sludge tank of the sludge separator. Through repeated squeezing and use of multiple squeeze filter boxes, the squeeze filter box has a larger volume than the plate and frame filter space, which not only has a higher sludge treatment capacity but also occupies relatively less space. At the same time, the squeeze filter box will not be blocked when liquid is fed in, making the operation more stable. The overturning of the squeeze filter box makes sludge treatment more convenient and efficient when dumping sludge, and the operation of the entire system is more stable.

Description

Technical Field

[0001] This invention relates to the field of mine water treatment, and more specifically to a mine water treatment system. Background Technology

[0002] Mine water is underground water that flows during coal mining and is itself a type of groundwater resource. In my country, coal mining is mainly carried out underground, accounting for about 97% of the total coal production. Since coal-bearing strata are generally below underground aquifers, a large amount of mine water must be drained during the coal mining process to ensure safe production underground.

[0003] The pumping of mine water damages groundwater resources in and around mining areas, causing groundwater levels to drop and leading to water scarcity for coal mining enterprises. If mine water is recycled, the environmental damage caused by over-exploitation of groundwater resources can be effectively mitigated, resulting in significant environmental benefits. Furthermore, treated mine water can meet the needs of production and daily life to varying degrees, and can also avoid paying sewage discharge fees and water resource loss fees, demonstrating substantial economic and social benefits.

[0004] As coal mining progresses underground, a significant amount of mining wastewater is generated, mainly consisting of water inflow from the mining face and water inflow from the goaf. The water inflow from the mining face is approximately 1000 m³ / h, while the water inflow from the goaf is approximately 1250 m³ / h. Since the suspended solids (SS) in mine water are greatly affected by the mining conditions of different coal seams, the deeper the coal seam is mined, the higher the SS content becomes. The SS content is 108.9 mg / L.

[0005] Existing water treatment methods include pretreatment and deep desalination (such as...) Figure 8 As shown in the diagram, pretreatment primarily reduces suspended solids and impurities in the water to ensure the stable operation of the subsequent deep desalination system. During pretreatment, the mine water collected in the aeration equalization tank enters a high-density sedimentation tank for sedimentation. The 37.17 m³ / h sludge produced in the high-density sedimentation tank is stored in a sludge tank and then transported to a plate and frame filter press for dewatering. Treating 37.17 m³ / h of sludge requires three 400 square meter (1.4 m filter plates) filter presses, each with a processing capacity of 12.5 m³ / h. Each filter press produces 3.2 m³ / h of sludge and 9.2 m³ / h of water. However, the plate and frame filter press has a small filtration space and operates intermittently (each working cycle is usually 4 to 6 hours). Multiple filter presses not only occupy a lot of space, but also have short operating cycles, requiring frequent operation by personnel, which is troublesome and difficult to adapt to mine water with high solids content. In addition, the feed port of the plate and frame filter press is prone to clogging during normal operation, making it difficult to remove the filter cake and affecting the stable operation of the entire system. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a mine water treatment system.

[0007] This invention is achieved through the following technical solution:

[0008] A mine water treatment system includes an aeration and equalization tank for storing mine water. The aeration and equalization tank uses a high-density booster pump to transport the mine water to a high-density tank for concentration and sedimentation. The supernatant in the upper part of the inclined tube sedimentation zone of the high-density tank overflows to a V-type filter for treatment. The sediment at the bottom of the inclined tube sedimentation zone is transported to a sludge tank by a sludge discharge pump. The sludge tank uses a feed pump to transport the sludge liquid to a sludge separator for repeated compression and separation. The sludge produced by the sludge separator is transported to the bottom conveyor belt for discharge. The filtrate produced by the sludge separator enters a filtrate tank and is transported to the aeration and equalization tank for recycling treatment via a filtrate pump.

[0009] Further optionally, the sludge separator includes a sludge tank, with several squeeze filter boxes annularly hinged to the top outer side of the sludge tank. The squeeze filter boxes are repeatedly squeezed and filtered by a tilting lifter and tilted into the sludge tank for synchronous collection of the filtered sludge. A filtrate tank is fixed to the outside of the sludge tank at the bottom of the squeeze filter box to collect the filtrate. The bottom of the filtrate tank is connected to the filtrate pool through a filtrate pipe.

[0010] Alternatively, the extrusion filter box includes a wedge-shaped box with an open top, an extrusion plate hinged to the outer end of the wedge-shaped box, the top of the extrusion plate being connected to the wire rope of the tilting lifter, a filter cloth matching its shape being installed inside the wedge-shaped box, and several filter holes being opened on the sides of the wedge-shaped box and the extrusion plate.

[0011] Alternatively, the tilting elevator includes a support base located at the upper center of the sludge tank, on which a longitudinal hydraulic winch is mounted, and multiple strands of steel wire rope wound and fixed on the hydraulic winch are respectively connected to the top of the extrusion plate of the corresponding extrusion filter box.

[0012] Further optionally, the tilting and lifting device includes several hydraulic winches arranged in a ring laterally and evenly on the support base, with the steel wire rope wound on the corresponding hydraulic winch connected to the top of the extrusion plate of the corresponding extrusion filter box.

[0013] Alternatively, a ring pipe is fixed to the outside of the support base. The ring pipe is connected to the outlet of the feed pump through an inlet pipe. The outside of the ring pipe is fixed to the top of the sludge tank through several downwardly inclined support guide pipes. One end of the support guide pipe is connected to and fixed to the ring pipe, and the other end of the support guide pipe extends to the outside of the sludge tank and is connected to and fixed to the front end of the side of the squeeze filter box through an inlet hose.

[0014] Alternatively, the extrusion plate on the outside of the wedge-shaped box is provided with a reset device. The reset device includes a connecting block fixed in the center of the outside of the extrusion plate. Both ends of the connecting block are fixed to one end of a tension spring by a reset steel wire rope, and the other end of the tension spring is connected and fixed to a fixing block fixed on the outside of the wedge-shaped box.

[0015] Optionally, a limit device is provided at the lower part of the wedge-shaped box. The limit device includes a pull rope switch, which is fixed to a support block on the outside of the sludge tank for supporting the wedge-shaped box. The steel wire pull rope of the pull rope switch is connected to the tail of the wedge-shaped box, and the pull rope switch is electrically connected to the controller of the hydraulic winch.

[0016] Alternatively, a limiting stop bar for supporting the extrusion plate is fixed to the upper outer end of the wedge-shaped box.

[0017] Alternatively, control valves may be installed at the inlet and outlet of the high-density booster pump, sludge discharge pump, feed pump, and filtrate pump.

[0018] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention installs a sludge separator on the outlet pipeline of the sludge tank of the mine water pretreatment sludge tank, and hinges multiple large-volume squeeze filter boxes that can be squeezed and overturned to the outside of the sludge tank of the sludge separator. Through repeated squeezing and use of multiple squeeze filter boxes, the volume of the squeeze filter box is relatively larger than that of the plate and frame filter space, which not only has a higher sludge treatment capacity but also occupies relatively less space. At the same time, the squeeze filter box will not be blocked when liquid is fed in, and the operation is more stable. When dumping sludge, the overturning of the squeeze filter box makes sludge treatment more convenient and efficient, and the operation of the entire system is more stable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the system of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the sludge separator in the diagram;

[0021] Figure 3 yes Figure 2 Enlarged view of a partial structural diagram;

[0022] Figure 4 yes Figure 1 Top view;

[0023] Figure 5 This is a schematic diagram of another arrangement structure of the hydraulic winch of the present invention;

[0024] Figure 6 This is a schematic diagram of the operation of the extrusion filter box of the present invention;

[0025] Figure 7 This is a schematic diagram of the operation of the extrusion filter box flipping and unloading material according to the present invention;

[0026] Figure 8 This is a prior art system diagram of the present invention;

[0027] In the diagram: 1. Aeration regulating tank; 2. High-density lift pump; 3. High-density tank; 4. Inclined tube sedimentation zone; 5. V-type filter; 6. Sludge discharge pump; 7. Sludge tank; 8. Feed pump; 9. Sludge separator; 10. Sludge trough; 11. Extrusion filter box; 11. Wedge-shaped box; 112. Extrusion plate; 113. Filter hole; 114. Filter cloth; 115. Limiting rod; 116. Reset wire rope; 117. Connecting block; 118. Tension spring; 119. Fixing block; 120. Support block; 121. Pull rope switch; 122. Wire rope; 12. Wire rope; 13. Hydraulic winch; 14. Support seat; 15. Ring pipe; 16. Support guide pipe; 17. Inlet hose; 18. Filtration tank; 19. Filtration pipe; 20. Sludge drop pipe; 21. Conveyor belt; 22. Filtration tank; 23. Filtration pump. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0029] like Figure 1 As shown, a mine water treatment system includes an aeration and equalization tank 1 for storing mine water. The aeration and equalization tank 1 uses a high-density booster pump 2 to transport the mine water to a high-density tank 3 for concentration and sedimentation treatment. The supernatant at the top of the inclined tube sedimentation zone 4 of the high-density tank 3 overflows to a V-type filter 5 for treatment. The sediment at the bottom of the inclined tube sedimentation zone 4 is transported to a sludge tank 7 by a sludge discharge pump 6. The sludge tank 7 uses a feed pump 8 to transport the sludge liquid to a sludge separator 9 for repeated squeezing and separation. The sludge generated by the sludge separator 9 is transported to the bottom conveyor belt 21 for discharge. The filtrate generated by the sludge separator 9 enters a filtrate tank 22 and is transported to the aeration and equalization tank 1 for recycling treatment via a filtrate pump 23.

[0030] like Figure 2 As shown, the sludge separator 9 includes a sludge tank 10. Several squeeze filter boxes 11 are annularly hinged to the outer side of the top of the sludge tank 10. The number of squeeze filter boxes is set according to actual use, and generally should not be less than 6. The more boxes, the higher the processing capacity. The volume of the squeeze filter box 11 is 0.8-2m³. If the volume of the squeeze filter box 11 is too large, the load on the hydraulic winch 13 will be too large, reducing its service life. The squeeze filter box 11 is repeatedly squeezed and filtered by the tilting lifter and tilted to the sludge tank 10 for synchronous collection of the filtered sludge. The lower part of the squeeze filter box 11 is provided with a filtrate tank 18 fixed to the outside of the sludge tank 10 to collect the filtrate. The bottom of the filtrate tank 18 is connected to the filtrate pool 22 through the filtrate pipe 19.

[0031] like Figure 2 , 3As shown, the squeeze filter box 11 includes a wedge-shaped box body 111 with an open top. The wedge-shaped box body 111 has a large top outlet, which makes it more convenient to tilt and pour out sludge. Moreover, the outer squeeze plate 112 squeezes the sludge inside, which is equivalent to the lever principle. The inclined squeeze plate 112 uses the bottom hinge as a fulcrum to squeeze the sludge inside, resulting in better squeeze filtration effect. A squeezing plate 112 is hinged to the outer end of the wedge-shaped box 111. The top of the squeezing plate 112 is connected to the wire rope of the tilting elevator. A filter cloth 114 matching its shape is installed inside the wedge-shaped box 111. The filter cloth 114 is of type 200-400 mesh. It can intercept sludge while ensuring the passage of filtrate. When the filter cloth 11 is fixed, its front and rear ends are respectively pasted to the inside of the wedge-shaped box 111 and the inner side of the squeezing plate 112. The two sides of the filter cloth 11 are in a relaxed state to avoid interfering with the subsequent tilting action of the squeezing plate 112. Several filter holes 113 are opened on the sides of the wedge-shaped box 111 and the squeezing plate 112.

[0032] like Figure 2 , 4 As shown, the tilting and lifting device includes a support base 14 located at the upper center of the sludge tank 10. A longitudinal hydraulic winch 13 is mounted on the support base 14. Multiple strands of steel wire rope are wound and fixed on the hydraulic winch 13 and connected to the top of the extrusion plate 112 of the corresponding extrusion filter box 11. In this way, multiple extrusion filter boxes 11 are extruded and filtered simultaneously by a single longitudinally arranged hydraulic winch 13. The longitudinally arranged hydraulic winch 13 is more energy-efficient. Using one hydraulic winch 13 can accommodate a smaller number and volume of extrusion filter boxes 11, avoiding excessive load on the hydraulic winch 13. The longitudinally arranged hydraulic winch 13 must ensure the perpendicularity of the extrusion plate 112 of the extrusion filter box 11 to the steel wire rope 12 to prevent the extrusion plate 112 from being tilted under force.

[0033] like Figure 5 As shown, the tilting and lifting device includes several hydraulic winches 13 arranged horizontally and evenly in a ring on the support base 14. The steel wire ropes wound on the hydraulic winches 13 are connected to the top of the extrusion plate 112 of the corresponding extrusion filter box 11. Another arrangement uses hydraulic winches 13 arranged one-to-one with the extrusion filter box 11 for operation. In this arrangement, the number of extrusion filter boxes 11 is not limited and the volume can be large for filtration. The hydraulic winches 13 have better adaptability.

[0034] like Figure 2As shown, a ring pipe 15 is fixed to the outside of the support base 14. The ring pipe 15 is connected to the outlet of the feed pump 8 through the liquid inlet pipe. The outside of the ring pipe 15 is fixed to the top of the sludge tank 10 through several downwardly inclined support guide pipes 16. The support guide pipes 16 not only support the support base 14, but also act as diversion pipes, avoiding repeated pipe layout and greatly saving costs. One end of the support guide pipe 16 is connected and fixed to the ring pipe 15, and the other end of the support guide pipe 16 extends to the outside of the sludge tank 10 and is connected and fixed to the front end of the side of the squeeze filter box 11 through the liquid inlet hose 17. The liquid inlet hose 17 can eliminate the displacement changes caused by the flipping of the squeeze filter box 11.

[0035] like Figure 3 As shown, the extrusion plate 112 on the outer side of the wedge-shaped housing 111 is equipped with a reset device. The reset device includes a connecting block 117 fixed in the center of the outer side of the extrusion plate 112. The two ends of the connecting block 117 are fixed to one end of the tension spring 118 through the reset steel wire rope 116. The other end of the tension spring 118 is connected and fixed to the fixing block 119 fixed on the outer side of the wedge-shaped housing 111. When the extrusion plate 112 is subjected to force and flipped, the tension springs 118 on both sides of the reset steel wire rope 116 will be stretched. When the extrusion plate 112 is not subjected to force and returns to its original position, the deformed tension springs 118 will pull the extrusion plate 112 back to its original position through the reset steel wire rope 116, thus ensuring the filtration volume of the entire wedge-shaped housing 111.

[0036] like Figure 6 As shown, a limiting device is provided at the lower part of the wedge-shaped box 111. The limiting device includes a pull rope switch 121, which is fixed on the support block 120 on the outside of the sludge tank 10 for supporting the wedge-shaped box 111. The steel wire pull rope 122 of the pull rope switch 121 is connected to the tail of the wedge-shaped box 111. The pull rope switch 121 is electrically connected to the controller of the hydraulic winch 13. The limiting device can control the position of the wedge-shaped box 111 to flip and pour material, preventing it from flipping beyond the limit and entering the sludge tank 10.

[0037] like Figure 2 As shown, a limiting stop 115 for supporting the extrusion plate 112 is fixed at the upper outer end of the wedge-shaped box 111. The limiting stop 115 can prevent the extrusion plate 112 from flipping to the outside of the wedge-shaped box 111, so that it forms a closed cavity.

[0038] like Figure 1 As shown, control valves are installed at the inlet and outlet of the high-density booster pump 2, the sludge discharge pump 6, the feed pump 8, and the filtrate pump 23.

[0039] The implementation principle of a mine water treatment system according to an embodiment of this application is as follows:

[0040] Aeration equalization tank 1 collects mine water with SS of 108.9 mg / L. Aeration is used to stir the water and homogenize its volume. The effluent from aeration equalization tank 1 is pumped to high-density tank 3 by high-density lift pump 2. Sodium hydroxide, sodium carbonate, quicklime, PAC and PAM are added to high-density tank 3 to remove calcium and magnesium hardness. The permeate produced after sedimentation in inclined tube sedimentation zone 4 flows by gravity to V-type filter 5. The residual small suspended solids in the water are removed by the filtration and adsorption of the filter media in V-type filter 5 and then enter the deep desalination system for treatment. The sludge produced in inclined tube sedimentation zone 4 (sludge concentration 30000 mg / L) is connected to sludge tank 7 for storage.

[0041] The sludge in the sludge tank 7 is transported to the sludge separator 9 by the feed pump 8 for dewatering and separation. After being pressurized by the feed pump 8, it is transported to the ring pipe 15 of the sludge separator 9. After being distributed by the ring pipe 15, it enters the squeeze filter box 11 along the support guide pipe 16 and the liquid inlet hose 17. After being filtered by the filter cloth 114 in the squeeze filter box 11, part of the liquid in the sludge permeates along the filter cloth 114 and is discharged from the filter hole 113 to the lower filtrate tank 18, thus achieving the preliminary filtration of the liquid in the sludge.

[0042] After preliminary filtration, the sludge in the squeeze filter box 11 accumulates inside. When the amount of sludge in the squeeze filter box 11 exceeds 1 / 2-2 / 3, the feeding pump 8 stops feeding, and the hydraulic winch 13 on the upper part of the sludge tank 10 is activated. The hydraulic winch 13 drives the various steel wire ropes 12 wound on it to pull the squeeze plate 112 hinged to the outside of the wedge-shaped box 111 of the squeeze filter box 11. The squeeze plate 112 will flip inward to the inside of the wedge-shaped box 111, squeezing the sludge accumulated inside the wedge-shaped box 111, reducing the water content of the sludge and increasing the dryness of the sludge. The squeezed liquid will continue to fall into the filtrate tank 18 along the filter holes 113. After squeezing, the hydraulic winch 13 is operated in reverse to release the steel wire ropes 12 from the squeeze plate 112. Under the action of the tension spring 118 of the reset device, the reset device returns to its original position, completing one squeezing process (e.g., Figure 6 (as shown)

[0043] After repeated operations of the above process (generally 2-3 cycles of compression), the sludge concentration of the precipitate is 400,000-450,000 mg / L. During the final compression, the hydraulic winch 13 continues to pull the compression plate 112 via the wire rope 12. When the compression plate 112 reaches its limit position, it drives the wedge-shaped box 111 to rotate along the upper part of the sludge tank 10. When the wedge-shaped box 111 rotates to a certain position on the upper part of the sludge tank 10 (e.g., ...), ... Figure 7As shown, pulling the steel wire rope 122 will trigger the rope switch 121. The rope switch 121 sends a signal to the controller of the hydraulic winch 13 to stop the hydraulic winch 13, preventing the wedge-shaped box 111 from flipping into the sludge tank 10. The sludge inside the wedge-shaped box 111 that has flipped into the upper part of the sludge tank 10 will be collected in the sludge tank 10 and finally fall down along the sludge drop pipe 20 to the conveyor belt 21 for transportation.

[0044] After the sludge is dumped, the hydraulic winch 13 is reversed to drive the wedge-shaped box 111 back to its original position for the next filtration process. The squeeze filter box 11 has a larger volume than the plate and frame filter space and is repeatedly squeezed and filtered by the squeeze plate 112. Using 8 squeeze filter boxes 11 with a volume of 2m³ (1 sludge separator), the sludge that was previously processed by 3 plate and frame filter presses can be filtered. Moreover, one operating cycle is extended to 7-9 hours. It not only occupies less space but also greatly improves the processing capacity. In addition, the squeeze filter box 11 will not be blocked when liquid is fed in, and the operation is more stable. At the same time, the sludge is more convenient and efficient to process by flipping and dumping the squeeze filter box 11. The operation of the entire system is more stable.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mine water treatment system, comprising an aeration regulating tank (1) for storing mine water, wherein the aeration regulating tank (1) transports the mine water to a high-density tank (3) for concentration and sedimentation treatment via a high-density booster pump (2), and the supernatant in the inclined tube sedimentation zone (4) of the high-density tank (3) overflows to a V-type filter (5) for treatment, characterized in that: The sediment at the bottom of the inclined tube sedimentation zone (4) is transported to the sludge tank (7) by the sludge discharge pump (6). The sludge tank (7) transports the sludge liquid to the sludge separator (9) by the feed pump (8) for repeated squeezing and separation. The sludge generated by the sludge separator (9) is transported to the bottom conveyor belt (21) for discharge. The filtrate generated by the sludge separator (9) enters the filtrate tank (22) and is transported to the aeration regulating tank (1) by the filtrate pump (23) for recycling. The sludge separator (9) includes a sludge tank (10). Several squeeze filter boxes (11) are annularly hinged to the top outer side of the sludge tank (10). The squeeze filter boxes (11) are repeatedly squeezed and filtered by a flipping lifter and flipped to the sludge tank (10) to collect the filtered sludge synchronously. The lower part of the squeeze filter box (11) is provided with a filtrate tank (18) fixed to the outside of the sludge tank (10) to collect the filtrate. The bottom of the filtrate tank (18) is connected to the filtrate pool (22) through a filtrate pipe (19). The extrusion filter box (11) includes a wedge-shaped box body (111) with an open top. An extrusion plate (112) is hinged to the outer end of the wedge-shaped box body (111). The top of the extrusion plate (112) is connected to the wire rope of the tilting lifter. A filter cloth (114) matching its shape is provided inside the wedge-shaped box body (111). Several filter holes (113) are opened on the sides of the wedge-shaped box body (111) and the extrusion plate (112). The tilting and lifting device includes a support base (14) set at the upper center of the sludge tank (10), and a longitudinal hydraulic winch (13) is provided on the support base (14). Multiple strands of steel wire ropes wound and fixed on the hydraulic winch (13) are respectively connected to the top of the extrusion plate (112) of the corresponding extrusion filter box (11). A ring pipe (15) is fixed to the outside of the support base (14). The ring pipe (15) is connected to the outlet of the feed pump (8) through the liquid inlet pipe. The outside of the ring pipe (15) is fixed to the top of the sludge tank (10) through several downwardly inclined support guide pipes (16). One end of the support guide pipe (16) is connected to the ring pipe (15) and fixed. The other end of the support guide pipe (16) extends to the outside of the sludge tank (10) and is connected to the front end of the side of the squeeze filter box (11) through the liquid inlet hose (17).

2. The mine water treatment system according to claim 1, characterized in that: The tilting and lifting device includes a number of hydraulic winches (13) arranged in a ring and horizontally on the support base (14), and the steel wire rope wound on the hydraulic winches (13) is connected to the top of the extrusion plate (112) of the corresponding extrusion filter box (11).

3. The mine water treatment system according to claim 1, characterized in that: The extrusion plate (112) on the outside of the wedge-shaped box (111) is provided with a reset device. The reset device includes a connecting block (117) fixed in the center of the outside of the extrusion plate (112). The two ends of the connecting block (117) are fixed to one end of the tension spring (118) by a reset steel wire rope (116). The other end of the tension spring (118) is connected and fixed to the fixing block (119) fixed on the outside of the wedge-shaped box (111).

4. A mine water treatment system according to claim 3, characterized in that: The lower part of the wedge-shaped box (111) is provided with a limiting device, which includes a pull rope switch (121). The pull rope switch (121) is fixed on the support block (120) on the outside of the sludge tank (10) for supporting the wedge-shaped box (111). The steel wire pull rope (122) of the pull rope switch (121) is connected to the tail of the wedge-shaped box (111). The pull rope switch (121) is electrically connected to the controller of the hydraulic winch (13).

5. A mine water treatment system according to claim 4, characterized in that: The upper outer end of the wedge-shaped box (111) is fixed with a limiting stop (115) for supporting the extrusion plate (112).

6. A mine water treatment system according to claim 1, characterized in that: The high-density booster pump (2), sludge discharge pump (6), feed pump (8) and filtrate pump (23) are all equipped with control valves at their inlet and outlet.

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