A mine water treatment system for use underground in coal mines

Abstract

The present invention provides a mine water treatment system for underground coal mines, comprising a sewage tank, a clean water tank, a sedimentation tank, a sludge tank, a dosing device, a sludge treatment unit, and a filter unit; the filter unit comprises a cylinder body, a cylinder cover, and a filter assembly; the interior of the cylinder body is laterally divided into a sewage collecting chamber, a filter chamber, and a clean water chamber; the filter assembly comprises a filter screen, an aeration pipe, and filter material; in the present invention, multi-stage filtration treatment is performed on sewage by cooperating with an infiltration assembly through the upper and lower multi-layer filter units, so that flocculants, particles, and colloids in the sewage are filtered more thoroughly and the filtration effect is good; clean water simultaneously flushes the filter material from the vertical direction and the lateral direction of the filter screen, further improving the backwash cleaning effect; gas is transported to the filter material through the aeration pipe to stir the filter material particles, thereby increasing the gap between adjacent filter material particles and making the pollutants between the filter material particles cleaned more thoroughly.

Description

Technical Field

[0001] The present invention relates to the technical field of mine water treatment, in particular to a mine water treatment system for underground coal mines. Background Art

[0002] When treating mine water, flocculants and coagulants are typically added to the water to form flocs from suspended solids, particles, and colloids, which then settle and separate from the water. The settled water is then filtered through a multi-media filter to produce clean water. Multi-media filters filter water through multiple layers of filter media within them. Over time, the flocculent content within the media increases, affecting the flow efficiency and, consequently, the filtration effect. Regular replacement of the filter media is necessary, resulting in high media consumption and a complex process, impacting the proper functioning of mine water treatment.

[0003] Chinese invention patent publication number CN103787528A discloses a mobile underground coal mine water treatment system, comprising: a raw water storage tank, a clean water tank, a mobile tubular membrane treatment mechanism, and a mobile sludge treatment system located underground in the coal mine. The raw water storage tank is connected to the inlet of the mobile tubular membrane treatment mechanism via a raw water inlet pipe. The clean water outlet of the mobile tubular membrane treatment mechanism is connected to the clean water tank via a clean water outlet pipe, and the concentrated water outlet of the mobile tubular membrane treatment mechanism is connected to the inlet of the mobile sludge treatment system via a concentrated sludge water outlet pipe. This mine water treatment system filters wastewater through the tubular membrane modules of the mobile tubular membrane treatment mechanism, resulting in poor filtration efficiency. When the tubular membrane modules are backwashed by a backwash mechanism, the water flow from the backwash mechanism flushes the tubular membrane modules in a single direction, failing to completely clean contaminants from the tubular membrane modules, resulting in poor backwashing effectiveness. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a mine water treatment system for underground coal mines, which improves the backwash effect of the filter unit in the treatment system, extends the filter material replacement cycle, and enables the filter unit to maintain a high-quality treatment effect.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A mine water treatment system for underground coal mines, comprising a sewage tank, a clean water tank, a sedimentation tank, a sludge tank, a dosing device, a sludge treatment unit, and a filter unit; the sewage tank, the sedimentation tank, the filter unit, and the clean water tank are sequentially connected through pipelines, the dosing device is connected to the pipeline between the sewage tank and the sedimentation tank, and the sludge treatment unit is connected to the filter unit, the sewage tank, and the sludge tank respectively through pipelines; the filter unit comprises a barrel, a barrel cover, and a filter assembly; the barrel cover is connected to the top of the barrel by bolts; an annular guide cavity is provided on the barrel; an annular air guide pipe is provided in the guide cavity, and an annular The air guide pipe is fixedly connected to the cylinder body; the interior of the cylinder body is horizontally divided into a sewage collecting chamber, a filter chamber and a water purification chamber; the water purification chamber is placed above the filter chamber, and the sewage collecting chamber is placed below the filter chamber; the filter assembly is arranged in the filter chamber; a water purification pipe connected to the water purification chamber is provided on the cylinder cover; an air intake pipe, a sewage pipe and a sludge pipe connected to the sewage collecting chamber are provided on the cylinder body; the air intake pipe is connected to the annular air guide pipe; the sludge pipe is provided at the bottom end of the cylinder body, and the sewage pipe is provided on the side of the cylinder body; multiple groups of filter assemblies are stacked from top to bottom; the filter assembly includes a filter screen, an aeration pipe, and filter material; the filter The outer wall of the mesh cover fits tightly with the inner wall of the cylinder body; the filter mesh cover is provided with a first air hole and a first guide hole, the cylinder body is provided with a second air hole adapted to the first air hole and a second guide hole adapted to the first guide hole, the second air hole is connected to the annular air guide pipe, and the first guide hole is connected to the guide cavity through the second guide hole; the aeration pipe is horizontally arranged in the filter mesh cover; one end of the aeration pipe passes through the first air hole and is connected to the second air hole; the aeration pipe is densely distributed with multiple air outlet holes; the filter material is filled in the filter mesh cover, and the particle diameter of the filter material in the multiple filter components gradually decreases from bottom to top ; An infiltration component is provided on the upper part of the top filter screen; the infiltration component includes a ring and an infiltration membrane; the infiltration membrane is arranged in the ring and fixedly connected to the inner wall of the ring; the outer wall of the ring fits tightly with the inner wall of the cylinder body, and the bottom end of the cylinder cover abuts the upper end of the ring; a third diversion hole is provided on the cylinder body, the third diversion hole is located above the infiltration component, and the third diversion hole connects the diversion chamber and the clean water chamber; a first one-way valve is provided in the third diversion hole; the clean water pipe is connected to the clean water tank, the air inlet pipe is connected to the air pump, the sewage pipe is connected to the sedimentation tank, and the sludge pipe is connected to the sludge treatment unit.

[0007] Preferably, a chlorine dioxide generator is fixedly installed inside the cylinder cover.

[0008] Preferably, the clean water pipe, air inlet pipe, sewage pipe and sludge pipe are respectively provided with solenoid valves.

[0009] Preferably, the filter screen is cylindrical with an opening on the top; a plurality of aeration tubes are provided; the aeration tubes are distributed in a circular array with the axis of the filter screen as the center; and the air outlet is provided below the aeration tube.

[0010] Preferably, the filter assembly also includes a positioning seat; the positioning seat includes a column and a cover shell; the bottom of the cover shell is set to an open mouth, the upper part is provided with multiple circular through holes, and the side is provided with multiple slots, and the end of the aeration tube close to the axis of the filter screen cover is clamped in the slot; the column is set below the cover shell, and the top of the column is fixedly connected to the cover shell; the bottom of the column is provided with a socket, and the filter screen cover is provided with a plug rod adapted to the socket.

[0011] Preferably, an arc-shaped guide plate corresponding to the second guide hole is provided inside the guide cavity; the bottom of the arc-shaped guide plate extends to the bottom of the second guide hole and is fixedly connected to the cylinder body; the concave side of the arc-shaped guide plate is arranged toward the second guide hole.

[0012] Preferably, an annular step is integrally provided inside the cylinder body; the filter screen cover of the filter assembly at the bottom abuts against the upper part of the annular step.

[0013] Preferably, a first flange is integrally provided at the bottom of the cylinder cover, a second flange is integrally provided at the top of the cylinder body, and the first flange and the second flange are connected by bolts; an annular sealing ring is provided between the first flange and the second flange.

[0014] Preferably, an annular sleeve is integrally provided at the bottom of the cylinder cover; when the cylinder cover is fixed on the cylinder body, the annular sleeve is inserted into the water purification chamber; the outer wall of the annular sleeve fits tightly with the inner wall of the cylinder body; the bottom of the annular sleeve abuts against the top of the circular ring; and a fourth flow guide hole corresponding to the third flow guide hole is provided on the annular sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the sewage is subjected to multi-stage filtration treatment by using the multi-layer filtration components arranged above and below in conjunction with the infiltration components, so that the flocculants, particles and colloids in the sewage are filtered more thoroughly and the filtration effect is good.

[0017] 2. In the present invention, clean water flushes the filter material from both the vertical and lateral directions of the filter screen, further improving the backwash cleaning effect.

[0018] 3. In the present invention, gas is transported to the filter material through the aeration pipe to stir the filter material particles, thereby increasing the gaps between adjacent filter material particles and making the pollutants between the filter material particles cleaned more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural block diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the present invention;

[0022] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0023] Figure 5 This is a structural breakdown diagram of the present invention;

[0024] Figure 6 Schematic diagram of the internal structure of the barrel in the present invention;

[0025] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0026] Figure 8 Schematic diagram of the structure of the cylinder cover in the present invention;

[0027] Figure 9 Schematic diagram of the structure of the filter screen cover in the present invention;

[0028] Figure 10 Schematic diagram of the structure of the aeration tube in the present invention;

[0029] Figure 11 It is a structural schematic diagram of the positioning seat in the present invention.

[0030] in:

[0031] 1. Cylinder body; 2. Sludge pipe; 3. Sewage pipe; 4. Air inlet pipe; 5. Water purification pipe; 6. Cylinder cover; 7. Chlorine dioxide generator; 8. Water purification chamber; 9. Infiltration component; 10. Filter chamber; 11. Diversion chamber; 12. Filter unit; 13. Sewage collecting chamber; 14. Annular air guide pipe; 15. Filter screen cover; 16. Aeration pipe; 17. Positioning seat; 18. Second diversion hole; 19. Arc-shaped guide plate; 20. First diversion hole; 21. First air hole; 22. Third diversion hole; 23. Annular sleeve; 24. Annular step; 25. Second air hole; 26. Insert rod; 27. Air outlet; 28. Circular through hole; 29. Column; 30. Slot. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like Figure 1As shown, a mine water treatment system for underground coal mines includes a sewage tank, a clean water tank, a sedimentation tank, a sludge tank, a dosing device, a sludge treatment unit, and a filtering unit 12; the sewage tank, the sedimentation tank, the filtering unit 12 and the clean water tank are connected in sequence through pipelines, the dosing device is connected to the pipeline between the sewage tank and the sedimentation tank, and the sludge treatment unit is connected to the filtering unit 12, the sewage tank and the sludge tank through pipelines respectively; the sewage tank is used to store underground coal mine sewage to be treated; the clean water tank is used to store treated clean water; the dosing device is used to add flocculants and coagulants to the sewage; the sedimentation tank is used for natural sedimentation of sewage to which flocculants and coagulants have been added; the sludge tank is used to store sludge separated from the sewage; the filtering unit 12 is used to filter pollutants in the mine water from the sedimentation tank; the sludge treatment unit is used to treat the pollutants separated by the filtering unit 12 and the sediment in the sedimentation tank, separate the sludge and sewage, and the sewage is returned to the sewage tank and the sludge enters the sludge tank. The sludge treatment unit is a commonly used equipment now; as shown Figures 2 to 5 As shown, the filter unit 12 includes a barrel 1, a barrel cover 6 and a filter assembly; Figure 6 、 Figure 7 As shown, the upper part of the cylinder body 1 is provided with an opening, and the cylinder cover 6 is connected to the top of the cylinder body 1 by bolts; the cylinder body 1 is cylindrical, and the bottom is a downwardly convex hemisphere; an annular guide cavity 11 is provided on the cylinder body 1, and the axis of the guide cavity 11 coincides with the axis of the cylinder body 1; an annular air guide tube 14 is provided in the guide cavity 11, and the annular air guide tube 14 is fixedly connected to the cylinder body 1; the interior of the cylinder body 1 is transversely divided into a sewage collecting chamber 13, a filter chamber 10 and a water purification chamber 8, and the sewage collecting chamber 13 is located in the hemisphere; the water purification chamber 8 is placed above the filter chamber 10, and the sewage collecting chamber 13 is placed below the filter chamber 10; the filter assembly is arranged in the filter chamber 10 for filtering sewage; as shown Figure 8 As shown, the cylinder cover 6 is provided with a clean water pipe 5 connected to the clean water chamber 8, and the filtered clean water is discharged from the clean water pipe 5; the cylinder body 1 is provided with an air inlet pipe 4, a sewage pipe 3 and a sludge pipe 2 connected to the sewage collecting chamber 13; the air inlet pipe 4 is connected to the annular air guide pipe 14; the sludge pipe 2 is arranged at the bottom of the cylinder body 1, and the sewage pipe 3 is arranged on the side of the cylinder body 1. The sewage pipe 3 is connected to the sewage collecting chamber 13, and the sewage enters the sewage collecting chamber 13. Under the action of gravity, some pollutants will settle down to the sludge pipe 2 around the sewage collecting chamber 13. As the water level in the sewage collecting chamber 13 rises, the sewage flows upward and is filtered and purified by the filter assembly layer by layer; the filter assembly is stacked with multiple groups from top to bottom to perform multi-stage filtration on the sewage; the filter assembly includes a filter screen cover 15, an aeration pipe 16, and filter material; the outer wall of the filter screen cover 15 is tightly fitted with the inner wall of the cylinder body 1, so that the sewage can only pass through the filter screen cover 15 and flow upward; as shown Figure 9As shown, the filter screen cover 15 is provided with a first air hole 21 and a first guide hole 20, and the cylinder body 1 is provided with a second air hole 25 adapted to the first air hole 21 and a second guide hole 18 adapted to the first guide hole 20. The second air hole 25 is connected to the annular air guide pipe 14, and the first guide hole 20 is connected to the guide cavity 11 through the second guide hole 18; the aeration pipe 16 is horizontally arranged in the filter screen cover 15; one end of the aeration pipe 16 passes through the first air hole 21 and is connected to the second air hole 25; as shown Figure 10 As shown, the aeration pipe 16 is densely covered with multiple air outlet holes 27, and the gas enters the annular air guide pipe 14 from the air inlet pipe 4 and is discharged from the air outlet holes 27 of the aeration pipe 16; a one-way valve is provided at one end of the aeration pipe 16 near the annular air guide pipe 14, so that air can only enter the aeration pipe 16 from the annular air guide pipe 14, and sewage cannot flow back into the annular air guide pipe 14; filter material is filled in the filter screen 15, and the particle diameter of the filter material in the multiple groups of filter components gradually decreases from bottom to top, realizing multi-stage filtration, and the filter material is commonly used quartz sand, activated carbon and other materials; a permeation component 9 is provided on the top of the filter screen 15; the permeation component 9 includes an annular and a permeable membrane; the permeable membrane is arranged in the ring and fixedly connected to the inner wall of the ring; the outer wall of the ring fits tightly against the inner wall of the cylinder body 1, and the bottom end of the cylinder cover 6 abuts against the upper end of the ring, and the filtered water is permeated and filtered through the permeable membrane; a third guide hole 22 is provided on the cylinder body 1, the third guide hole 22 is located above the permeation component 9, and the third guide hole 22 connects the guide cavity 11 and the clean water cavity 8; a first one-way valve is provided in the third guide hole 22, so that water can only flow from the clean water cavity 8 into the guide cavity 11; the clean water pipe 5 is connected to the clean water tank, the air inlet pipe 4 is connected to the air pump, the sewage pipe 3 is connected to the sedimentation tank, and the sludge pipe 2 is connected to the sludge treatment unit.

[0034] Further, such as Figure 3 As shown, a chlorine dioxide generator 7 is fixedly installed inside the cylinder cover 6 to purify the water filtered by the osmotic membrane.

[0035] Furthermore, solenoid valves are respectively provided on the clean water pipe 5, the air inlet pipe 4, the sewage pipe 3 and the sludge pipe 2 to control the opening and closing of each pipe.

[0036] Further, such as Figure 9 As shown, the filter screen cover 15 is cylindrical, and an opening is provided at the top for placing the filter material in the filter screen cover 15; Figure 10 As shown, a plurality of aeration tubes 16 are provided; the plurality of aeration tubes 16 are distributed in a circular array with the axis of the filter screen 15 as the center; the air outlet 27 is provided below the aeration tube 16, and the gas is ejected from the air outlet 27 and moves upward through both sides of the aeration tube 16, so that the filter material around the aeration tube 16 can also be exposed to the gas, thereby expanding the aeration range.

[0037] Further, such as Figures 4 to 6 、 Figure 11 As shown, the filter assembly also includes a positioning seat 17; the positioning seat 17 includes a column 29 and a cover shell; the bottom of the cover shell is set to an open mouth, a plurality of circular through holes 28 are provided on the upper part, and a plurality of slots 30 are provided on the side, and one end of the aeration tube 16 close to the axis of the filter screen cover 15 is clamped in the slot 30; the column 29 is set below the cover shell, and the top of the column 29 is fixedly connected to the cover shell; a plug hole is provided at the bottom of the column 29, and a plug rod 26 that matches the plug hole is provided on the filter screen cover 15. After the aeration tube 16 is plugged into the filter screen cover 15, the positioning seat 17 is plugged into the plug rod 26, and the aeration tube 16 is clamped by the slot 30 on the cover shell of the positioning seat 17, so that both ends of the aeration tube 16 are fixed to prevent the aeration tube 16 from being crooked when the filter material is laid into the filter screen cover 15, which causes a gap to appear at the connection between the aeration tube 16 and the cylinder body 1, resulting in water seepage into the annular air guide tube 14.

[0038] Further, such as Figure 3 、 Figure 4 As shown, the interior of the diversion cavity 11 is provided with an arc-shaped guide plate 19 corresponding to the second diversion hole 18; the bottom of the arc-shaped guide plate 19 extends to the bottom of the second diversion hole 18 and is fixedly connected to the cylinder body 1; the concave side of the arc-shaped guide plate 19 is arranged toward the second diversion hole 18. When the mine water is filtered and purified, part of the sewage enters the diversion cavity 11 from the first diversion hole 20 and the second diversion hole 18. The pollutants in the sewage naturally settle under the action of gravity and flow back to the cylinder body 1 along the arc-shaped guide plate 19, reducing the accumulation of pollutants in the diversion cavity 11; a hatch is provided on the cylinder body 1, which can be opened to clean the diversion cavity 11.

[0039] Further, such as Figure 3 、 Figure 6 As shown, an annular step 24 is integrally provided inside the barrel 1 ; the filter screen cover 15 of the bottom filter assembly abuts against the upper portion of the annular step 24 to provide support for the filter screen cover 15 .

[0040] Further, such as Figure 3 As shown, a first flange is integrally provided at the bottom of the cylinder cover 6, and a second flange is integrally provided at the top of the cylinder body 1. The first flange and the second flange are connected by bolts. After removing the bolts, the cylinder cover 6 can be removed from the cylinder body 1 for cleaning; an annular sealing ring is provided between the first flange and the second flange to perform a sealing function and prevent water leakage.

[0041] Further, such as Figure 8As shown, an annular sleeve 23 is integrally provided at the bottom of the cylinder cover 6; when the cylinder cover 6 is fixed on the cylinder body 1, the annular sleeve 23 is inserted into the water purification chamber 8; the outer wall of the annular sleeve 23 fits tightly with the inner wall of the cylinder body 1; the bottom of the annular sleeve 23 abuts against the top of the circular ring; a fourth guide hole corresponding to the third guide hole 22 is provided on the annular sleeve 23. After the cylinder cover 6 is covered on the cylinder body 1, the circular ring is supported by the annular sleeve 23 to firmly fix the filter component and the permeation component 9.

[0042] Working principle:

[0043] While the mine water in the sewage tank is pumped to the sedimentation tank, the dosing device adds flocculants and coagulant aids to the mine water, so that the flocs in the mine water are naturally settled in the sedimentation tank. The settled mine water is pumped to the filter unit 12 and enters the sewage collecting chamber 13 at the bottom of the cylinder body 1 through the sewage pipe 3. Some residual flocs are settled again in the sewage collecting chamber 13. As the water level in the sewage collecting chamber 13 rises, the sewage passes through the multi-layer filter unit 12 from bottom to top, and enters the permeable membrane after being filtered by the filter material in the filter unit 12. After the permeation reaction of the permeable membrane, the clean water enters the clean water chamber 8, reacts with the chlorine dioxide generated by the chlorine dioxide generator 7 in the clean water chamber 8, and the clean water enters the clean water tank from the clean water pipe 5 for storage. When the filter unit 12 needs to be backwashed, the sewage pipe 3 is closed, the sludge pipe 2 is opened, and the clean water tank is connected to the clean water pipe 5. The clean water is pumped through the permeable membrane and flows downward, passing through the multi-layer filter components in sequence, flushing the flocculants in the filter media in the filter components into the sewage collecting chamber 13, and then discharged from the sludge pipe 2 to the sludge treatment unit for treatment. At the same time, the clean water in the clean water tank enters the diversion chamber 11 through the third diversion hole 22 and the fourth diversion hole, and flows into the filter screen 15 through the second diversion hole 18 and the first diversion hole 20, horizontally flushing the filter media in the filter screen 15, so that the flocculants between the gaps between the filter media particles are fully flushed. While the clean water is backwashing the filter media particles, the gas transported to the aeration pipe 16 through the annular air guide pipe 14 is ejected from the air outlet 27. Under the action of the airflow, the filter media particles are pushed upward, the gaps between adjacent filter media particles are increased, and the flocculants sandwiched between the filter media particles are completely cleaned, making the backwashing more thorough. After the pollutants are treated in the sludge treatment unit, they are separated into sewage and sludge. The sludge is transported to the sludge tank for storage, and the sewage is transported to the sewage tank for further purification.

Claims

1. A mine water treatment system for underground coal mines, characterized in that: The invention comprises a sewage tank, a clean water tank, a sedimentation tank, a sludge tank, a dosing device, a sludge treatment unit, and a filter unit (12); the sewage tank, the sedimentation tank, the filter unit (12) and the clean water tank are sequentially connected through pipelines, the dosing device is connected to the pipeline between the sewage tank and the sedimentation tank, and the sludge treatment unit is respectively connected to the filter unit (12), the sewage tank and the sludge tank through pipelines, and the filter unit (12) comprises a barrel (1), a barrel cover (6) and a filter assembly; the barrel cover (6) is connected to the top of the barrel (1) by bolts; an annular guide cavity (11) is provided on the barrel (1); an annular air guide pipe (14) is provided in the guide cavity (11), and the annular air guide pipe (14) is fixedly connected to the barrel (1); the inner of the barrel (1) The cylinder body (1) is laterally divided into a sewage collecting chamber (13), a filter chamber (10) and a water purification chamber (8); the water purification chamber (8) is arranged above the filter chamber (10), and the sewage collecting chamber (13) is arranged below the filter chamber (10); the filter assembly is arranged in the filter chamber (10); a water purification pipe (5) communicating with the water purification chamber (8) is arranged on the cylinder cover (6); an air intake pipe (4), a sewage pipe (3) and a sludge pipe (2) communicating with the sewage collecting chamber (13) are arranged on the cylinder body (1); the air intake pipe (4) is communicated with the annular air guide pipe (14); the sludge pipe (2) is arranged at the bottom end of the cylinder body (1), and the sewage pipe (3) is arranged on the side of the cylinder body (1); a plurality of filter assemblies are stacked from top to bottom; the filter assembly includes a filter screen cover (15) , aeration pipe (16), filter material; the outer wall of the filter screen cover (15) is tightly fitted with the inner wall of the cylinder body (1); the filter screen cover (15) is provided with a first air hole (21) and a first flow guide hole (20); the cylinder body (1) is provided with a second air hole (25) adapted to the first air hole (21) and a second flow guide hole (18) adapted to the first flow guide hole (20); the second air hole (25) is communicated with the annular air guide pipe (14), and the first flow guide hole (20) is communicated with the flow guide cavity (11) through the second flow guide hole (18); the aeration pipe (16) is horizontally arranged in the filter screen cover (15); one end of the aeration pipe (16) passes through the first air hole (21) and is communicated with the second air hole (25); the aeration pipe (16) is tightly fitted with the inner wall of the cylinder body (1); the filter screen cover (15) is provided with a first air hole (21) and a first flow guide hole (20); A plurality of air outlet holes (27) are arranged; filter material is filled in the filter screen cover (15), and the particle diameter of the filter material in the plurality of filter components gradually decreases from bottom to top; a permeation component (9) is arranged on the upper part of the top filter screen cover (15); the permeation component (9) includes a ring and a permeation membrane; the permeation membrane is arranged in the ring and fixedly connected to the inner wall of the ring; the outer wall of the ring is tightly fitted with the inner wall of the cylinder body (1), and the bottom end of the cylinder cover (6) abuts the upper end of the ring; a third guide hole (22) is arranged on the cylinder body (1), the third guide hole (22) is located above the permeation component (9), and the third guide hole (22) is connected to the guide cavity (11) and the clean water cavity (8); a first one-way valve is arranged in the third guide hole (22);The clean water pipe (5) is connected to the clean water tank, the air inlet pipe (4) is connected to an air pump, the sewage pipe (3) is connected to the sedimentation tank, and the sludge pipe (2) is connected to the sludge treatment unit; The filter screen cover (15) is cylindrical and has an opening at the top; a plurality of aeration pipes (16) are provided; the plurality of aeration pipes (16) are distributed in a circular array with the axis of the filter screen cover (15) as the center; the air outlet (27) is provided below the aeration pipe (16); The filter assembly also includes a positioning seat (17); the positioning seat (17) includes a column (29) and a cover shell; the bottom of the cover shell is set as an open mouth, the upper part is provided with a plurality of circular through holes (28), and the side is provided with a plurality of slots (30), and the end of the aeration pipe (16) close to the axis of the filter screen cover (15) is clamped in the slot (30); the column (29) is set below the cover shell, and the top of the column (29) is fixedly connected to the cover shell; the bottom of the column (29) is provided with a socket, and the filter screen cover (15) is provided with a plug rod (26) adapted to the socket.

2. A mine water treatment system for underground coal mines according to claim 1, characterized in that: A chlorine dioxide generator (7) is fixedly arranged inside the cylinder cover (6).

3. The mine water treatment system for underground coal mines according to claim 1, characterized in that: The clean water pipe (5), the air inlet pipe (4), the sewage pipe (3) and the sludge pipe (2) are respectively provided with electromagnetic valves.

4. The mine water treatment system for underground coal mines according to claim 1, characterized in that: An arc-shaped guide plate (19) corresponding to the second guide hole (18) is provided inside the guide cavity (11); the bottom of the arc-shaped guide plate (19) extends to below the second guide hole (18) and is fixedly connected to the barrel (1); and the concave side of the arc-shaped guide plate (19) is arranged toward the second guide hole (18).

5. The mine water treatment system for underground coal mines according to claim 1, characterized in that: An annular step (24) is integrally provided inside the barrel (1); the filter screen cover (15) of the filter assembly at the bottom abuts against the upper portion of the annular step (24).

6. The mine water treatment system for underground coal mines according to claim 1, characterized in that: The bottom of the cylinder cover (6) is integrally provided with a first flange, and the top of the cylinder body (1) is integrally provided with a second flange. The first flange and the second flange are connected by bolts; an annular sealing ring is provided between the first flange and the second flange.

7. A mine water treatment system for underground coal mines according to claim 6, characterized in that: The bottom of the cylinder cover (6) is integrally provided with an annular sleeve (23); when the cylinder cover (6) is fixed on the cylinder body (1), the annular sleeve (23) is inserted into the water purification chamber (8); the outer wall of the annular sleeve (23) is tightly fitted with the inner wall of the cylinder body (1); the bottom of the annular sleeve (23) abuts against the top of the circular ring; and a fourth flow guide hole corresponding to the third flow guide hole (22) is provided on the annular sleeve (23).

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