A filter for mine water treatment

Abstract

The utility model discloses a filter for mine water treatment relates to mining technical field, include: bottom disc, flocculator, filter device, backwashing device. The bottom of bottom disc is provided with wheel, flocculator is located in bottom disc, and the bottom of flocculator is provided with pollution discharge subassembly, and flocculator is configured to precipitate and discharge the solid impurity in mine water, filter device is located in bottom disc, and filter device is connected in the water outlet of flocculator, and filter device is configured to be used for filtering the solid impurity in mine water, backwashing device is connected to filter device and flocculator, and backwashing device is configured to be used for washing the solid impurity that filter device intercepts to flocculator. The utility model discloses have the advantage that the water treatment capacity is big.

Description

Technical Field

[0001] This utility model relates to the field of mining technology, and in particular to a filter for mine water treatment. Background Technology

[0002] Mine water originates from groundwater. Coal production activities and the resource utilization of groundwater by coal enterprises have a significant impact. Reusing mine water as a water resource can replace a large amount of surface water and groundwater, which is beneficial for protecting surface and groundwater resources and improving the water environment in water-scarce areas. Therefore, the reuse of treated mine water is not only an expansion of resource development but also the best choice for alleviating water shortages in mining areas. It is also an important way to protect the ecological environment and prevent water pollution. By directly treating and purifying mine water underground, the amount of mine water pumped out can be effectively reduced, transportation energy consumption can be lowered, and the demand for surface facilities and sludge disposal issues can be reduced. However, due to the limited internal size of mines, existing underground water treatment control systems have relatively small water treatment capacity, which cannot meet the production needs of mining. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a filter for mine water treatment, which has the advantage of a large water treatment capacity.

[0004] A filter for mine water treatment according to a first aspect of the present invention includes: a chassis, a flocculation device, a filtration device, and a backwashing device. The chassis is equipped with wheels at its bottom; the flocculation device is disposed on the chassis, and a discharge assembly is provided at its bottom; the flocculation device is configured to settle and discharge solid impurities in the mine water; the filtration device is disposed on the chassis and connected to the outlet end of the flocculation device; the filtration device is configured to filter solid impurities in the mine water; the backwashing device is connected to the filtration device and the flocculation device, and is configured to flush the solid impurities intercepted by the filtration device into the flocculation device.

[0005] A filter for mine water treatment according to an embodiment of this utility model has at least the following beneficial effects: the flocculation device removes most of the solid impurities in the wastewater during the pretreatment stage, and removes most of the solid impurities before entering the precision filtration stage, greatly reducing the burden on the filtration device. The drain assembly promptly discharges the concentrated sludge settled at the bottom. After the filtration device has been running for a period of time, it will become clogged by impurities, leading to a decrease in water production and an increase in pressure, necessitating backwashing. The backwash water contains high-concentration impurities washed off the filter media. It is discharged back to the flocculation device, where the impurities in the backwash wastewater settle again, forming concentrated sludge together with the impurities in the raw mine water, which is then discharged uniformly by the drain assembly. The flocculation device and the filtration device perform staged filtration to increase the water treatment capacity per unit time, and backwashing ensures the rapid recovery of the filtration device, ensuring the continuous operation of the system.

[0006] According to some embodiments of the present invention, the flocculation device includes: a sedimentation tank, wherein the sewage discharge component is disposed at the bottom of the sedimentation tank; and an overflow tank, wherein the overflow tank is connected to the upper end of the sedimentation tank; wherein, after the mine water settles in the sedimentation tank, it can overflow from the upper end to the overflow tank.

[0007] According to some embodiments of the present invention, the flocculation device further includes a hydrocyclone, the inlet end of which is connected to the outlet end of the overflow tank, the bottom outlet end of which is connected to the sedimentation tank, and the top outlet end of which is connected to the filtration device. The hydrocyclone is configured to separate mine water and transport the separated mine water to the filtration device.

[0008] According to some embodiments of the present invention, the sedimentation tank is connected to a water supply pipe to transport the mine water to be treated to the sedimentation tank. The water supply pipe is connected to a dosing pipe, which is used to transport flocculant to the water supply pipe and mix it with the mine water to be treated.

[0009] According to some embodiments of the present invention, the sewage discharge assembly includes a screw, a conveying motor, and a conveying pipe. The conveying pipe is connected to the bottom end of the sedimentation tank. The screw is disposed inside the conveying pipe. The conveying motor is connected to the screw in a transmission. The screw rotates to drive the solid-liquid mixture inside the conveying pipe to move along the conveying pipe.

[0010] According to some embodiments of the present invention, the filtration device includes a cover plate, a filter element, and a housing. The housing has an open upper end and a closed lower end. The filter element is cylindrical, with a closed upper end and an open lower end. The filter element is detachably disposed inside the housing. The cover plate is detachably connected to the upper end of the housing and is used to close the upper end of the housing. The lower end of the cover plate abuts against the upper end of the filter element, and the lower end of the filter element abuts against the lower end of the housing. A first sealing ring is provided at the contact position between the housing and the lower end of the filter element.

[0011] According to some embodiments of the present invention, the cover plate is rotatably mounted on the upper end of the outer shell on one side, and a fixing part is provided on the side of the outer shell. A baffle is rotatably mounted on the fixing part. The baffle has a first position and a second position. When the baffle is in the first position, the lower end of the baffle abuts against the upper end of the cover plate. When the baffle is in the second position, the baffle is separated from the cover plate.

[0012] According to some embodiments of the present invention, the baffle is provided with a threaded hole, and a cover plate locking part is provided in the threaded hole. The cover plate locking part can be adjusted up and down. When the baffle is in the first position, the cover plate locking part can move to abut against the upper end of the cover plate.

[0013] According to some embodiments of the present invention, the inner wall of the outer shell is provided with a ring platform, the ring platform abuts against the lower end of the cover plate, and a second sealing ring is provided between the ring platform and the cover plate.

[0014] According to some embodiments of this utility model, the backwashing device includes a backwashing water pipe and a return water pipe. The return water pipe is connected to the flocculation device. The outer shell is connected to a filter outlet pipe and a filter inlet pipe. The filter outlet pipe is connected to the inner space of the first sealing ring. The filter inlet pipe and the return water pipe are both connected to the outer space of the first sealing ring. The backwashing water pipe is located between the filter outlet pipe and the filter inlet pipe. Valves are provided on the backwashing water pipe, the filter outlet pipe, the filter inlet pipe, and the return water pipe.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the installation structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of a flocculation device according to an embodiment of the present invention; Figure 3 This is an exploded view of a filtration device according to an embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of one embodiment of the present utility model; Figure 5 This is a schematic diagram of the baffle in a first position according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a baffle according to one embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of a filter device according to an embodiment of the present invention.

[0017] Icon labels: Chassis 100, wheels 110; Flocculation device 200, sedimentation tank 210, water supply pipe 211, chemical dosing pipe 212, overflow tank 220, hydrocyclone 230; Sewage discharge assembly 300, screw 310, conveyor motor 320, conveyor pipe 330; Filter device 400, cover plate 410, filter element 420, first sealing ring 421, outer shell 430, fixing part 431, baffle 432, cover plate locking part 433, threaded hole 434, ring platform 440, second sealing ring 441, filter outlet pipe 450, filter inlet pipe 460. Backwashing device 500, backwashing water pipe 510, return water pipe 520, main water pump 530, auxiliary water pump 540. Detailed Implementation The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Reference Figures 1 to 7As shown, an embodiment of this utility model discloses a filter for mine water treatment, comprising: a chassis 100, a flocculation device 200, a filtration device 400, and a backwashing device 500. The chassis 100 is equipped with wheels 110 at its bottom, suitable for situations where mine production sites frequently change. It eliminates the need to construct fixed water treatment facilities at each new work site, allowing for rapid deployment and flexible allocation. Mine water and flocculant are mixed in the flocculation device 200. Suspended solids and flocculant in the mine water settle to the bottom of the flocculation device 200. The flocculant is selected from one or more of polyferric aluminum chloride sulfate, polyferric silicate sulfate, aluminum sulfate, and ferric chloride. The flocculation device 200 is bolted to the top of the chassis 100. A drain assembly 300 is provided at the bottom of the flocculation device 200, used to discharge the settled suspended solids and flocculant from the flocculation device 200. The material discharged by the drain assembly 300 can be used as raw material for mine backfilling or post-mining backfilling. The flocculation device 200 is configured to settle and discharge solid impurities in the mine water. The filter device 400 is mounted on the chassis 100 and connected to the outlet of the flocculation device 200. A main water pump 530 is installed between the filter device 400 and the outlet of the flocculation device 200, increasing the pressure of the mine water entering the filter device 400. This allows the water to flow through the filter media at a higher velocity, increasing the water production per unit time. The filter device 400 is configured to filter solid impurities in the mine water. A backwashing device 500 is connected to the filter device 400 and the flocculation device 200, and is configured to flush the solid impurities intercepted by the filter device 400 into the flocculation device 200. After the impurities intercepted by the filter device 400 are rinsed, they are not directly discharged as wastewater, but are returned to the upstream flocculation device 200 for further sedimentation. The solid impurities in this wastewater settle together with the impurities in the raw mine water. This eliminates the need for separate discharge pipes or treatment facilities for the backwash wastewater, simplifying the system structure. In this embodiment, the flocculation device 200 removes most of the solid impurities from the wastewater during the pretreatment stage, significantly reducing the burden on the filter device 400 before it enters the precision filtration stage. The sludge discharge component 300 promptly discharges the concentrated sludge settled at the bottom. After a period of operation, the filter device 400 becomes clogged with impurities, leading to a decrease in water production and an increase in pressure, necessitating backwashing. The backwash water contains a high concentration of impurities washed off the filter media. This is returned to the flocculation device 200, where the impurities in the backwash wastewater settle again, forming concentrated sludge together with the impurities in the raw mine water, which is then discharged by the sludge discharge component 300. The flocculation device 200 and the filtration device 400 perform staged filtration to increase the amount of water processed per unit time. Backwashing ensures the rapid recovery of the filtration device 400, ensuring the continuous operation of the system and further increasing the amount of water processed per unit time.

[0022] Reference Figure 1 and Figure 4 As shown, the flocculation device 200 includes a sedimentation tank 210 and an overflow tank 220. The lower end of the sedimentation tank 210 is funnel-shaped to facilitate the settling of suspended solids in the sedimentation tank 210 to the bottom. The sludge discharge component 300 is located at the bottom of the sedimentation tank 210. The overflow tank 220 is connected to the upper end of the sedimentation tank 210. After sedimentation in the sedimentation tank 210, the mine water can overflow from the upper end to the overflow tank 220. After sufficient sedimentation in the sedimentation tank 210, the mine water naturally lies at the upper layer of the sedimentation tank 210 and then enters the overflow tank 220, reducing the suspended solids load entering the subsequent filtration device 400.

[0023] Reference Figure 1 and Figure 4 As shown, it can be understood that the flocculation device 200 also includes a hydrocyclone 230. The specific structure of the hydrocyclone 230 is existing technology and will not be described in detail. The inlet end of the hydrocyclone 230 is connected to the outlet end of the overflow tank 220. A secondary water pump 540 is installed between the outlet end of the overflow tank 220 and the inlet end of the hydrocyclone 230. The secondary water pump 540 drives the mine water into the hydrocyclone 230. The secondary water pump 540 only needs to provide a suitable inlet pressure for the hydrocyclone 230, while the main water pump 530 focuses on providing a higher pressure inlet water to the filter device 400. This division of labor allows for more precise pump selection and higher operating efficiency. The bottom outlet end of the hydrocyclone 230 is connected to the sedimentation tank 210, and the top outlet end of the hydrocyclone 230 is connected to the filter device 400. The hydrocyclone 230 is configured to separate the mine water and transport the separated mine water to the filter device 400. The hydrocyclone 230 utilizes centrifugal force to efficiently separate tiny but heavier solid particles carried in the overflow tank 220 effluent that have not completely settled. This reduces the total amount of solids entering the subsequent filtration device 400, extends the backwash interval, and reduces backwash water consumption. Furthermore, the three-stage filtration system—flocculation device 200, hydrocyclone 230, and filtration device 400—processes a larger volume of water per unit time compared to two-stage filtration.

[0024] Reference Figure 1 and Figure 2 As shown, the sedimentation tank 210 is connected to a water supply pipe 211 to transport the mine water to be treated into the sedimentation tank 210. The water supply pipe 211 is connected to a dosing pipe 212, which is used to deliver flocculant to the water supply pipe 211 for mixing with the mine water. The mine water undergoes preliminary mixing with the flocculant while entering the sedimentation tank 210, improving the flocculation effect. This eliminates the need for a mechanical stirring device in the sedimentation tank 210. It is foreseeable that a flow meter is installed on the water supply pipe 211, and a regulating valve is installed on the dosing pipe 212, which controls the flow rate of the dosing pump based on the flow signal from the water supply pipe 211. This ensures optimal flocculation and avoids waste or insufficient use of the flocculant.

[0025] Reference Figure 4 As shown, the sewage discharge assembly 300 includes a screw 310, a conveying motor 320, and a conveying pipe 330. The conveying pipe 330 is connected to the bottom of the sedimentation tank 210. The screw 310 is disposed inside the conveying pipe 330, and the conveying motor 320 is connected to the screw 310 for transmission. The screw 310 rotates to drive the solid-liquid mixture inside the conveying pipe 330 to move along the conveying pipe 330. The sewage discharge assembly 300 is a common screw conveyor, which has the advantages of simple structure and convenient maintenance.

[0026] Reference Figures 3 to 7 As shown, the filter device 400 includes a cover plate 410, a filter element 420, and a housing 430. The housing 430 is a cylindrical shape with an open top and a closed bottom. The filter element 420 is also cylindrical, with a closed top and an open bottom. The filter element 420 and the housing 430 are coaxially designed, providing the maximum filtration area within a given volume of the housing 430. The filter element 420 is detachably disposed inside the housing 430. The cover plate 410 is detachably connected to the upper end of the housing 430, and is used to close the upper end of the housing 430. The lower end of the cover plate 410 abuts against the upper end of the filter element 420, and the lower end of the filter element 420 abuts against the lower end of the housing 430. A first sealing ring 421 is provided at the contact position between the lower end of the housing 430 and the lower end of the filter element 420. The first sealing ring 421 ensures that unfiltered mine water can only enter the filter element 420 from the outside through the filter media, and cannot flow out directly through the gap between the filter element 420 and the bottom of the outer casing 430. While ensuring filtration efficiency, maintenance is simple. During maintenance, simply open the removable cover 410 to remove the entire cylindrical filter element 420 from the outer casing 430 and insert a new or cleaned filter element 420. This reduces downtime and ensures continuous mine production.

[0027] Reference Figures 3 to 7 As shown, it can be understood that the cover plate 410 is rotatably mounted on the upper end of the housing 430. A handle for easy operation is provided at the upper end of the cover plate 410. A fixing part 431 is welded to the side of the housing 430. A rotating shaft is vertically mounted on the upper end of the fixing part 431. A baffle 432 is rotatably mounted on the fixing part 431 and is sleeved on the rotating shaft. Two nuts are threaded onto the rotating shaft. The baffle 432 is located between the two nuts. The two nuts are used to adjust and limit the height of the baffle 432. The baffle 432 has a first position and a second position. When the baffle 432 is in the first position, its lower end abuts against the upper end of the cover plate 410. When the baffle 432 is in the second position, it is separated from the cover plate 410. The operator can open the cover plate 410 by simply rotating the baffle 432 to the second position without using any tools. To close, the cover plate 410 is lowered and the baffle 432 is rotated back to the first position to lock it.

[0028] Reference Figures 5 to 7 As shown, the baffle 432 has a threaded hole 434, and a cover locking part 433 is provided in the threaded hole 434. The cover locking part 433 is a hand-tightening bolt or a bolt with an operating handle, so that the operator can operate it without tools. The cover locking part 433 can be adjusted up and down. When the baffle 432 is in the first position, the cover locking part 433 can move to abut against the upper end of the cover 410. The cover locking part 433 is threaded in the threaded hole 434 to provide precisely controlled clamping force. During manufacturing and assembly, there may be slight tolerances in the dimensions of components such as the cover 410, filter element 420, and housing 430. A fixed-height baffle 432 may be too loose, causing leakage, or too tight, causing installation difficulties. The cover locking part 433 ensures that the cover 410 receives just the right clamping force under any circumstances.

[0029] Reference Figure 7 As shown, it can be understood that the inner wall of the outer casing 430 is provided with an annular platform 440, which abuts against the lower end of the cover plate 410. A second sealing ring 441 is provided between the annular platform 440 and the cover plate 410. The function of the second sealing ring 441 between the annular platform 440 and the cover plate 410 is to prevent high-pressure water from leaking to the outside from the joint surface between the cover plate 410 and the outer casing 430. The main function of the first sealing ring 421 between the lower end of the filter element 420 and the bottom of the outer casing 430 is to prevent water flow "short-circuiting" and ensure that water must pass through the filter element 420.

[0030] Reference Figure 1 and Figure 3 As shown, the backwashing device 500 includes a backwash water pipe 510 and a return water pipe 520. The return water pipe 520 is connected to the flocculation device 200, allowing the wastewater and impurities generated during backwashing to return to the flocculation device 200. This is similar to the underflow return of the hydrocyclone 230. The outer casing 430 is connected to a filter outlet pipe 450 and a filter inlet pipe 460. The filter inlet pipe 460 is connected to the outlet of the main water pump 530. The filter outlet pipe 450 is connected to the inner space of the first sealing ring 421, and both the filter inlet pipe 460 and the return water pipe 520 are connected to the outer space of the first sealing ring 421. The backwash water pipe 510 is located between the filter outlet pipe 450 and the filter inlet pipe 460. Valves are installed on the backwash water pipe 510, the filter outlet pipe 450, the filter inlet pipe 460, and the return water pipe 520. The backwashing device 500 changes the direction of water flow by closing and opening specific valves, allowing clean backwash water to flow in the opposite direction from the inside of the filter element 420 to the outside, flushing away impurities trapped on the outer surface of the filter element 420. This enables maintenance without shutting down the machine, allowing the equipment to quickly restore its processing capacity and ensuring the continuity of mine production.

[0031] Operating Procedures: The mine water to be treated is transported to the sedimentation tank 210 through the water inlet pipe 211. Simultaneously, the flocculant is added to the water inlet pipe 211 through the dosing pipe 212, achieving uniform mixing through turbulence within the pipe. The mixed water enters the funnel-shaped sedimentation tank 210, where the large and dense flocculated sediments quickly settle to the bottom under gravity and are periodically discharged through the sludge discharge component 300. The clear supernatant overflows into the adjacent overflow tank 220. The water in the overflow tank 220 is pumped into the hydrocyclone 230 by the auxiliary water pump 540. The hydrocyclone 230 uses centrifugal force to further separate the finer, heavier particles in the water. The underflow containing high concentrations of sediment is returned to the sedimentation tank 210, which enhances the flocculation effect and achieves sludge concentration. Meanwhile, the mine water enters the main water pump 530, which increases the water pressure and pumps it into the filtration device 400. Pressurized water enters the housing 430 through the filter inlet pipe 460 and is distributed in the outer space of the cylindrical filter element 420. Driven by pressure, the water flows from the outside to the inside of the filter element 420, intercepting all residual micro-suspended matter. Pure water enters the inner space of the filter element 420 and finally flows out from the filter outlet pipe 450. When the filter element 420 needs cleaning due to impurity accumulation, the water flow direction is switched by operating the valves on the pipeline: the valves on the filter inlet pipe 460 and the filter outlet pipe 450 are closed, and the valves on the backwash water pipe 510 and the return water pipe 520 are opened. Clean backwash water enters the filter element 420 from the filter outlet pipe 450 in the reverse direction, thoroughly flushing away the trapped impurities. The backwash wastewater carrying impurities is sent back to the flocculation device 200 through the return water pipe 520, where the impurities settle again in the sedimentation tank 210, and the wastewater is recycled, thus forming an environmentally friendly closed-loop cycle with no wastewater discharge and centralized sludge treatment.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A filter for mine water treatment, characterized in that, include: A chassis (100) with wheels (110) provided at the bottom of the chassis (100). A flocculation device (200) is provided on the chassis (100), and a sewage discharge assembly (300) is provided at the bottom of the flocculation device (200). The flocculation device (200) is configured to settle and discharge solid impurities in the mine water. A filter device (400) is provided on the chassis (100), the filter device (400) is connected to the outlet end of the flocculation device (200), and the filter device (400) is configured to filter solid impurities in mine water. A backwashing device (500) is connected to the filter device (400) and the flocculation device (200), and the backwashing device (500) is configured to flush solid impurities intercepted by the filter device (400) into the flocculation device (200).

2. The filter for mine water treatment according to claim 1, characterized in that: The flocculation device (200) includes: Sedimentation tank (210), wherein the sewage discharge component (300) is located at the bottom of the sedimentation tank (210); An overflow tank (220) is connected to the upper end of the sedimentation tank (210); The mine water can overflow from the top to the overflow pool (220) after settling in the sedimentation tank (210).

3. The filter for mine water treatment according to claim 2, characterized in that: The flocculation device (200) further includes a hydrocyclone (230), the inlet end of which is connected to the outlet end of the overflow tank (220), the bottom outlet end of which is connected to the sedimentation tank (210), and the top outlet end of which is connected to the filter device (400). The hydrocyclone (230) is configured to separate mine water and deliver the separated mine water to the filter device (400).

4. The filter for mine water treatment according to claim 3, characterized in that: The sedimentation tank (210) is connected to a water supply pipe (211) to transport the mine water to be treated to the sedimentation tank (210). The water supply pipe (211) is connected to a dosing pipe (212) to transport flocculant to the water supply pipe (211) and mix it with the mine water to be treated.

5. The filter for mine water treatment according to claim 2, characterized in that: The sewage discharge assembly (300) includes a screw (310), a conveying motor (320), and a conveying pipe (330). The conveying pipe (330) is connected to the bottom end of the sedimentation tank (210). The screw (310) is disposed inside the conveying pipe (330). The conveying motor (320) is connected to the screw (310) for transmission. The screw (310) rotates to drive the solid-liquid mixture in the conveying pipe (330) to move along the conveying pipe (330).

6. The filter for mine water treatment according to claim 1, characterized in that: The filtration device (400) includes a cover plate (410), a filter element (420), and a housing (430). The housing (430) is open at the top and closed at the bottom. The filter element (420) is cylindrical, closed at the top and open at the bottom. The filter element (420) is detachably disposed inside the housing (430). The cover plate (410) is detachably connected to the top of the housing (430) and is used to close the top of the housing (430). The bottom of the cover plate (410) abuts against the top of the filter element (420), and the bottom of the filter element (420) abuts against the bottom of the housing (430). A first sealing ring (421) is provided at the contact position between the housing (430) and the bottom of the filter element (420).

7. The filter for mine water treatment according to claim 6, characterized in that: The cover plate (410) is rotatably mounted on one side of the upper end of the outer shell (430). The outer shell (430) has a fixing part (431) on its side. A baffle (432) is rotatably mounted on the fixing part (431). The baffle (432) has a first position and a second position. When the baffle (432) is in the first position, the lower end of the baffle (432) abuts against the upper end of the cover plate (410). When the baffle (432) is in the second position, the baffle (432) is separated from the cover plate (410).

8. The filter for mine water treatment according to claim 7, characterized in that: The baffle (432) has a threaded hole (434) and a cover plate locking part (433) is provided in the threaded hole (434). The cover plate locking part (433) can be adjusted up and down. When the baffle (432) is in the first position, the cover plate locking part (433) can move to abut against the upper end of the cover plate (410).

9. The filter for mine water treatment according to claim 6, characterized in that: The inner wall of the outer shell (430) is provided with a ring platform (440), the ring platform (440) abuts against the lower end of the cover plate (410), and a second sealing ring (441) is provided between the ring platform (440) and the cover plate (410).

10. The filter for mine water treatment according to claim 6, characterized in that: The backwashing device (500) includes a backwash water pipe (510) and a return water pipe (520). The return water pipe (520) is connected to the flocculation device (200). The outer shell (430) is connected to a filter outlet pipe (450) and a filter inlet pipe (460). The filter outlet pipe (450) is connected to the inner space of the first sealing ring (421). The filter inlet pipe (460) and the return water pipe (520) are both connected to the outer space of the first sealing ring (421). The backwash water pipe (510) is located between the filter outlet pipe (450) and the filter inlet pipe (460). Valves are provided on the backwash water pipe (510), the filter outlet pipe (450), the filter inlet pipe (460), and the return water pipe (520).

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