An integrated skid-mounted device for removing COD and total nitrogen from mine water

Abstract

This application relates to the field of mine water treatment equipment, and in particular to an integrated skid-mounted device for removing COD and total nitrogen from mine water. The device includes an adsorption unit comprising a pre-adsorption tank, an adsorption assembly, and a lifting assembly. The other end of an outlet pipe is connected to the pre-adsorption tank, and the connection between the outlet pipe and the pre-adsorption tank is located above the lowest adsorption assembly. A second lifting pump is located at the opening of the pre-adsorption tank, and an inlet pipe is installed on the second lifting pump. The adsorption assembly includes a container, a sponge pad, activated carbon, filter cloth, and a cover plate. The cover plate has mesh openings. The length and width of the container are smaller than the length and width of the opening of the pre-adsorption tank. The thickness of the sponge pad is greater than the distance between the container and the pre-adsorption tank. The lifting end of the lifting assembly is detachably connected to the cover plate, achieving the effect of maintaining the activated carbon filtration speed and stabilizing the activated carbon adsorption efficiency when purifying large quantities of mine water.

Description

Technical Field

[0001] This application relates to the field of mine water treatment equipment, and in particular to an integrated skid-mounted device for removing COD and total nitrogen from mine water. Background Technology

[0002] Currently, mine water refers to all water that enters the underground mining space during coal mining operations; it is groundwater polluted during coal mining. Coal mine water is mostly highly mineralized, with a total dissolved solids concentration (TDS) greater than or equal to 1000 mg / L, which cannot meet discharge standards after simple treatment. COD is an important indicator in mine water treatment, used to assess the degree of organic pollution in the water body. By measuring COD, the content of organic matter in the mine water can be determined, thereby judging the effectiveness of mine water treatment and the degree of pollution. Monitoring COD ensures that the treated water quality meets discharge standards.

[0003] To ensure that treated mine water meets discharge standards, coagulation sedimentation-biological treatment processes or coagulation sedimentation-advanced oxidation series processes are generally used for mine water treatment. In the initial stage of mine water treatment, activated carbon adsorption tanks are required for adsorption treatment. Most existing activated carbon wastewater treatment devices adopt a cylindrical structure, where activated carbon is placed inside the cylinder, and the wastewater is purified through the adsorption effect of the activated carbon within the cylinder.

[0004] The existing technical solutions mentioned above have the following drawbacks: the diameter of the cylinder containing activated carbon is limited by the structure, and the single volume is limited. In the process of purifying a large amount of mine water, it is necessary to use a large number of single cylinders stacked together, which has the disadvantages of large area occupation and complicated operation. In addition, after long-term operation, pollutants will accumulate on the surface of the activated carbon adsorption layer, reducing the filtration speed and causing activated carbon to caking, which greatly reduces the adsorption efficiency of activated carbon. Summary of the Invention

[0005] In order to maintain the activated carbon filtration rate and stabilize the activated carbon adsorption efficiency when purifying large quantities of mine water, this application provides an integrated skid-mounted device for removing COD and total nitrogen from mine water.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] An integrated skid-mounted device for removing COD and total nitrogen from mine water includes a water collection unit, an adsorption unit, a hardness and fluoride removal unit, a sedimentation unit, an intermediate water tank unit, an ozone catalytic oxidation unit, an AO unit tank, a sludge dewatering machine, and a sulfur autotrophic tank connected in sequence. The water collection unit includes an outlet pipe connected at one end to the water collection unit.

[0008] The adsorption unit includes a front adsorption tank with an open top, multiple sets of movable adsorption components arranged vertically and spaced apart in the front adsorption tank, and a lifting component arranged above the front adsorption tank for lifting the adsorption components.

[0009] The other end of the water outlet pipe is fixed and connected to the front adsorption tank, and the connection between the water outlet pipe and the front adsorption tank is located above the bottommost adsorption component.

[0010] A second lift pump is installed inside the open front adsorption tank and above the uppermost adsorption component. The second lift pump is equipped with an inlet pipe for discharging mine water from the front adsorption tank. The inlet pipe is a flexible pipe.

[0011] The adsorption assembly includes a container with a mesh opening at the bottom and an open top, a sponge pad layer fixedly installed on the outer wall of the container, activated carbon placed inside the container and flush with the opening, filter cloth laid between the activated carbon and the opening of the container, and a cover plate detachably connected to the container and used to cover the opening. The cover plate has a mesh opening on its surface. The length and width of the container are both smaller than the length and width of the opening of the front adsorption tank. The thickness of the sponge pad layer is greater than the distance between the container and the front adsorption tank. The lifting end of the lifting assembly is detachably connected to the cover plate.

[0012] By adopting the above technical solution, the skid-mounted device has a reasonable and compact overall structure, enabling real-time purification of large quantities of mine water during mine excavation. The connection between the outlet pipe and the pre-adsorption tank is located between the two lower storage tanks. This reduces sludge deposition at the bottom of the pre-adsorption tank, facilitating stable operation of the second submersible mixer. The mine water rises from the bottom to the surface in the pre-adsorption tank, effectively blocking sludge from the mine water and enhancing the adsorption of sludge and other impurities. Even after prolonged operation, it prevents the accumulation of pollutants on the surface of the activated carbon adsorption layer, thus reducing the filtration rate and the likelihood of activated carbon caking. This significantly improves the adsorption efficiency of the activated carbon, thereby significantly reducing the impurity content in the mine water discharged from the pre-adsorption tank, which is beneficial for subsequent purification treatment of the mine water.

[0013] Optionally, handles are installed on opposite sides of the cover plate, and an arc-shaped segment is machined in the middle of the handle, with the opening of the arc-shaped segment facing the cover plate;

[0014] A hook is installed on the lifting end of the lifting component, and the hook can be hooked onto the arc segment.

[0015] By adopting the above technical solution, the arc-shaped segment can ensure that the container is stably connected to the lifting end of the lifting component, while also facilitating the stable lifting and lowering of the container.

[0016] Optionally, a second submersible mixer is provided at the bottom of the aforementioned adsorption tank, and the second submersible mixer is located below the lowest adsorption component.

[0017] By adopting the above technical solution, the second submersible mixer promotes the mixing of sludge and sewage and prevents sludge deposition. The submersible mixer effectively prevents the deposition of activated sludge in the collection tank by generating a stable and uniform horizontal flow.

[0018] Optionally, the end of the inlet pipe away from the pre-adsorption tank is connected to a hardening and defluorination box, and a first stirring mechanism is installed on the hardening and defluorination box.

[0019] The first stirring mechanism includes a gantry frame with both ends fixed to the top of the defluorination and denitrification box, a first driving component disposed on the gantry frame, a first stirring element rotatably connected to the output end of the first driving component, a second driving component installed on the top of the defluorination and denitrification box and driving the first stirring element, and an adjusting component installed on the top of the defluorination and denitrification box for adjusting the second driving component.

[0020] The first drive component includes a drive disc suspended below the gantry frame and located between the gantry frame and the defluorination box;

[0021] The first stirring component includes a first rotating shaft rotatably mounted on the drive disk and whose axial direction is parallel to the axis of the drive disk, and a first stirring fin and a second stirring fin that are spaced apart from top to bottom along the axis of the first rotating shaft.

[0022] The second drive component includes a drive sprocket suspended below the gantry frame, a driven sprocket sleeved and fixed to the first rotating shaft and located below the drive disc, and a chain.

[0023] The adjusting component adjusts the chain to always be engaged with the drive sprocket and the driven sprocket.

[0024] By adopting the above technical solution, the first rotating shaft, under the constraint of the adjusting component, can rotate within the hardening and defluorination chamber along with the drive disc, while simultaneously rotating on its own axis. This allows the first rotating shaft, the first stirring blade, and the second stirring blade to simultaneously agitate and disturb the mine water within the chamber at multiple locations, thereby increasing the reaction rate between the reagent and ionic impurities. The staggered arrangement of the first and second stirring blades significantly increases the number of agitation points of the stirring components within the hardening and defluorination chamber, enabling the reagent to more fully contact the ionic impurities in the mine water, further effectively increasing the reaction rate between the reagent and ionic impurities, and significantly improving the working speed of the mine water purification treatment.

[0025] Optionally, the adjusting component includes a limiting groove fixed to the top of the defluorination box, a connecting rod with one end rolled in the limiting groove and the other end rotatably connected to the first rotating shaft, and an adjusting sprocket rotatably mounted on the connecting rod. The chain is wound around and meshes with the drive sprocket, the driven sprocket, and the adjusting sprocket. The drive sprocket, the driven sprocket, and the adjusting sprocket are always arranged in a triangular pattern. When the distance between the drive sprocket and the driven sprocket is the smallest, the adjusting sprocket is located at the end of the limiting groove away from the drive disc. When the distance between the drive sprocket and the driven sprocket is the largest, the adjusting sprocket is located at the end of the limiting groove close to the drive disc.

[0026] By adopting the above technical solution, the regulating component has the characteristics of simple structure and stable operation, which can ensure that the first rotating shaft can revolve stably on the hardening and defluorination box, thereby ensuring that the mine water and reagents are fully stirred, increasing the contact probability between the reagents and ionic impurities in the mine water, and facilitating the effective purification of large amounts of mine water.

[0027] Optionally, the first stirring blade includes a circular plate coaxially fixed to the first rotating shaft and a bent plate fixed to the edge of the circular plate. Multiple bent plates are arranged around the outer diameter of the circular plate, and the multiple bent plates are located on both sides of the two plates of the circular plate. Through holes are opened on the plates of the circular plate.

[0028] The second stirring blade can push water flow towards the first stirring blade.

[0029] By adopting the above technical solution, during the rotation of the first stirring blade, the through holes create a cavity inside the mine water. After the defluorinating agent, alkali solution, flocculant, and other agents enter this cavity, the contact area between the agents and the mine water increases, thereby increasing the speed at which the agents remove ionic impurities. The rotation of the second stirring blade pushes the mine water towards the first stirring blade, causing the mine water to circulate from bottom to top within the hardening and defluorination tank. This, combined with the first stirring blade, further enhances the reaction speed at which the agents remove ionic impurities.

[0030] Optionally, the adsorption unit further includes a post-adsorption tank;

[0031] The sedimentation unit is equipped with four reflux pumps and reflux pipes connected to the reflux pumps. Two reflux pipes are connected to the front adsorption tank, one reflux pipe is connected to the rear adsorption tank, and the other reflux pipe is connected to the AO unit tank.

[0032] Optionally, the AO unit tank is equipped with a dissolved oxygen meter, a first ORP meter, a third submersible mixer, an aeration fan, and an aeration disc. The third submersible mixer is suspended in the middle of the AO unit tank, the aeration disc is located inside the AO unit tank, and the aeration fan is installed at the top of the AO unit tank and connected to the top of the aeration disc.

[0033] By adopting the above technical solution, the mine water treated in the previous steps is combined with the different environmental conditions of the anaerobic, anoxic and aerobic zones, and the biodegradation ability of microorganisms is used to gradually decompose and oxidize the organic matter and pollutants such as ammonia and phosphorus in the wastewater, thereby achieving the purpose of purifying the mine wastewater.

[0034] Optionally, a second ORP instrument is installed in the sulfur autotrophic tank, a sulfur autotrophic packing mechanism is installed on the top of the sulfur autotrophic tank, a backwash water pump is installed in the sulfur autotrophic tank, a sixth water supply pipe is connected to the backwash water pump, one end of the sixth water supply pipe is fixedly connected to the backwash water pump, and the other end is fixedly connected to and communicates with the post-ozone catalytic oxidation tank.

[0035] By adopting the above technical solution, the second ORP meter, through measuring the oxidation-reduction potential (ORP value) of water, can understand the self-purification capacity, biological activity, and water quality status of the water body. During wastewater treatment, changes in the ORP value can be used to determine the activity and efficiency of the biological treatment unit, guiding adjustments to aeration rate and reagent dosage, and optimizing the wastewater treatment process. The backwash pump provides backwash water to the sulfur autotrophic tank, helping it restore its filtration capacity. By increasing the amount of packing material in the sulfur autotrophic tank, the backwash pump improves the filtration effect and water production without increasing the flow rate or filtration cycle.

[0036] Optionally, the water collection unit includes a water collection pool with an open top, an inlet pipe with one end connected to the inside of the water collection pool, a first electromagnetic flow meter installed on the inlet pipe, an inlet pump installed on the other end of the inlet pipe, a first submersible mixer suspended inside the water collection pool, a first lift pump installed inside the water collection pool, an outlet pipe with one end fixedly connected to the first lift pump and the other end extending from the open end of the water collection pool to the outside, a second electromagnetic flow meter installed on the outlet pipe, and a level gauge installed on the inner wall of the water collection pool.

[0037] By adopting the above technical solution, the inlet pump is placed in the mine's water source during operation, allowing mine water to be collected into a collection tank through the inlet pipe. The collection rate can be monitored in real time using a first electromagnetic flow meter. After water is injected into the collection tank, a first submersible mixer ensures that suspended solids and sediments are evenly distributed, avoiding dead zones and improving the homogeneity of the effluent. The mine water temporarily stored in the collection tank can be discharged through a first lift pump and an outlet pipe, and a second electromagnetic flow meter can monitor the discharge of mine water in real time.

[0038] In summary, this application has the following technical effects:

[0039] 1. By setting up an adsorption unit, the connection between the outlet pipe and the pre-adsorption tank is located between the two lower holding tanks. This reduces sludge deposition at the bottom of the pre-adsorption tank. The mine water rises from the bottom to the water level in the pre-adsorption tank. The adsorption components can effectively block sludge in the mine water and improve the adsorption of sludge and other impurities. After long-term operation, it will not cause pollutants to accumulate on the surface of the activated carbon adsorption layer, thus reducing the filtration speed and the probability of activated carbon caking. This greatly improves the adsorption efficiency of activated carbon, thereby significantly reducing the impurity content in the mine water discharged from the pre-adsorption tank, which is beneficial for subsequent purification treatment of the mine water.

[0040] 2. By setting an arc-shaped section in the middle of the handle, the arc-shaped section can ensure that the container can be stably connected to the lifting end of the lifting component, while also facilitating the stable lifting and lowering of the container;

[0041] 3. By installing a second submersible mixer, the sludge and sewage are mixed to prevent sludge deposition. The submersible mixer generates a stable and uniform horizontal flow, which effectively prevents the deposition of activated sludge in the collection tank. Attached Figure Description

[0042] Figure 1 This is a structural diagram of the object of this application;

[0043] Figure 2 This is a structural diagram of the application after removing the mounting bracket;

[0044] Figure 3 This is a top view of the application after removing the mounting bracket;

[0045] Figure 4 This is a structural diagram of the water collection unit;

[0046] Figure 5 This is a cross-sectional structural diagram of the pre-adsorption cell;

[0047] Figure 6 This is an assembly diagram of the adsorption component;

[0048] Figure 7 This is a cross-sectional structural diagram of the hardening and defluorination chamber;

[0049] Figure 8 This is a structural diagram of the first stirring mechanism;

[0050] Figure 9 This is a structural diagram of the sedimentation unit and the sludge dewatering machine;

[0051] Figure 10 This is a schematic diagram of the second stirring mechanism;

[0052] Figure 11 This is a cross-sectional structural diagram of the first intermediate water tank and the pre-ozone catalytic oxidation tank;

[0053] Figure 12 This is a cross-sectional structural diagram of the post-ozone catalytic oxidation tank;

[0054] Figure 13 This is a cross-sectional view of the AO unit pool.

[0055] Figure 14 This is a cross-sectional structural diagram of a sulfur autotrophic tank.

[0056] Explanation of reference numerals in the attached drawings: 1. Water collection unit; 110. Water collection tank; 120. Inlet pipe; 130. First electromagnetic flowmeter; 140. Inlet pump; 150. First submersible mixer; 160. First lift pump; 170. Outlet pipe; 180. Second electromagnetic flowmeter; 190. Level gauge; 2. Adsorption unit; 21. Pre-adsorption tank; 22. Second submersible mixer; 23. Adsorption assembly; 231. Container; 232. Sponge pad; 233. Activated carbon; 234. Filter cloth; 235. Screw; 236. Cover plate; 237. Handle; 238. Nut; 24. Lifting assembly; 241. Winch; 242. Wire rope; 243. Hook; 25. Post-adsorption tank; 3. Hardening and defluorination unit; 31. Hardening and defluorination unit 32. Inlet pipe; 33. Second booster pump; 34. First dosing mechanism; 35. First stirring mechanism; 351. Gantry frame; 352. First drive component; 3521. First drive motor; 3522. Drive disc; 3523. Fixed cylinder; 353. First stirring element; 3531. First rotating shaft; 3532. First bearing; 3533. First stirring fin; 35331. Circular plate; 35332. Bending plate; 35333. Through hole; 3534. Second stirring fin; 354. Second drive component; 3541. Second drive motor; 3542. Drive sprocket; 3543. Driven sprocket; 3544. Chain; 355. Adjusting component; 3551. Limiting groove; 3552. Limiting pulley; 355 3. Connecting rod; 3554. Second bearing; 3555. Adjusting sprocket; 36. First sludge conveying pump; 37. First sludge conveying pipe; 4. Sedimentation unit; 41. First sedimentation tank; 411. Second sludge conveying pipe; 412. Second sludge conveying pump; 413. First return pump; 414. First return pipe; 415. Third lift pump; 416. First conveying pipe; 42. Second sedimentation tank; 421. Third sludge conveying pipe; 422. Third sludge conveying pump; 423. Second return pump; 424. Second return pipe; 425. Fourth lift pump; 426. Second conveying pipe; 43. Third sedimentation tank; 431. Fourth sludge conveying pipe; 432. Fourth sludge conveying pump; 433. Third return pump; 434. Three return pipes; 435, Fourth return pump; 436, Fourth return pipe; 437, Fifth lift pump; 438, Third conveying pipe; 44, Second stirring mechanism; 441, Horizontal plate; 442, Third drive motor; 443, Second rotating shaft; 444, First stirring plate; 445, Second stirring plate; 5, Intermediate water tank unit; 51, First intermediate water tank; 511, First water pump; 512, First water pipe; 52, Second intermediate water tank; 521, Second water pump; 522, Second water pipe; 6, Ozone catalytic oxidation unit; 61, Front ozone catalytic oxidation tank; 611, First ozone generator; 612, Third water pump; 613, Third water pipe; 62, Rear ozone catalytic oxidation tank; 621, Second ozone generator;622. Fourth water pump; 623. Fourth water pipe; 7. AO unit tank; 71. Dissolved oxygen meter; 72. First ORP meter; 73. Third submersible mixer; 74. Aeration blower; 75. Aeration disc; 76. Third water pump; 77. Fifth water pipe; 8. Sludge dewatering machine; 81. Fifth sludge conveying pipe; 82. Fifth sludge conveying pump; 83. Filtrate recovery pump; 84. Filtrate recovery pipe; 9. Sulfate autotrophic tank; 91. Second ORP meter; 92. Sulfate autotrophic packing mechanism; 93. Backwash water pump; 94. Sixth water pipe; 10. Clear water tank; 11. Mounting frame; 111. Base plate; 112. Cable tray; 12. Electrical control system; 121. PLC cabinet; 122. Frequency converter cabinet; 123. Distribution cabinet; 124. Instrument box. Detailed Implementation

[0057] The present application is further described in detail below with reference to the accompanying drawings.

[0058] This application discloses an integrated skid-mounted device for removing COD and total nitrogen from mine water, combined with... Figures 1-3 The skid-mounted device includes a mounting frame 11, and sequentially arranged on the mounting frame 11 are a water collection unit 1, an adsorption unit 2, a hardening and defluorination unit 3, a sedimentation unit 4, an intermediate water tank unit 5, an ozone catalytic oxidation unit 6, an AO unit tank 7, a sludge dewatering machine 8, a sulfur autotrophic tank 9, and a clear water tank 10. The mounting frame 11 includes a horizontally arranged base plate 111 and a cable tray 112 arranged on the upper part of the base plate 111. The base plate 111 is a strip plate, and the cable tray 112 is inverted U-shaped with both ends fixedly connected to the two ends of the base plate 111. The upper part of the cable tray 112 is suspended from the base plate 111, providing sufficient installation space for components such as the water collection unit 1.

[0059] Reference Figure 4 The water collection unit 1 includes a water collection tank 110 with an open top, an inlet pipe 120 fixed at one end to the outer wall of the water collection tank 110 and communicating with the interior of the water collection tank 110, a first electromagnetic flowmeter 130 installed on the inlet pipe 120, an inlet pump 140 installed at the other end of the inlet pipe 120, a first submersible mixer 150 suspended inside the water collection tank 110, a first lift pump 160 installed inside the water collection tank 110, an outlet pipe 170 fixedly connected at one end to the first lift pump 160 and extending from the open end of the water collection tank 110 to the outside of the water collection tank 110, a second electromagnetic flowmeter 180 installed on the outlet pipe 170, and a level gauge 190 installed on the inner wall of the water collection tank 110. The water collection tank 110 is located at the upper part of one end of the base plate 111.

[0060] In operation, the inlet pump 140 is placed in the mine's water source, allowing mine water to be collected into the collection tank 110 via the inlet pipe 120. The collection rate can be monitored in real time using the first electromagnetic flowmeter 130. After water is injected into the collection tank 110, the first submersible mixer 150 can evenly distribute suspended solids and sediments in the water, avoiding dead zones and improving the homogeneity of the effluent. The mine water temporarily stored in the collection tank 110 can be discharged via the first lift pump 160 and the outlet pipe 170, and the second electromagnetic flowmeter 180 can monitor the mine water discharge in real time.

[0061] Combination Figure 3 and Figure 5 The adsorption unit 2 includes a front adsorption tank 21 and a rear adsorption tank 25 with open tops, a second submersible mixer 22 installed in the adsorption tanks, an adsorption assembly 23 movably installed in the adsorption tanks, and a lifting assembly 24 installed on the bridge frame 112 and located above the adsorption tanks. The front adsorption tank 21 is located on the bottom plate 111 and on the side of the water collection tank away from the bottom plate 111. The outlet pipe 170 is fixed to the middle of the outer wall of the front adsorption tank 21 at one end away from the first lifting pump 160, and the outlet pipe 170 is connected to the interior of the front adsorption tank 21. The second submersible mixer 22 promotes the mixing of sludge and sewage to prevent sludge deposition. The submersible mixer effectively prevents the deposition of activated sludge in the water collection tank 110 by generating a stable and uniform horizontal flow.

[0062] Reference Figure 6 The adsorption assembly 23 includes a container 231 with a mesh opening at the bottom and an open top, a sponge pad 232 fixedly installed on the outer wall of the container 231, activated carbon 233 placed inside the container 231 and flush with the opening of the container 231, filter cloth 234 laid between the activated carbon 233 and the opening of the container 231, screws 235 vertically installed and fixed at the four corners of the opening of the container 231, a cover plate 236 for covering the opening of the container 231, handles 237 fixedly installed on opposite sides of the cover plate 236, and nuts 238 threadedly connected to the screws 235.

[0063] The length and width of the container 231 are both smaller than the length and width of the adsorption tank opening, and the thickness of the sponge pad 232 is greater than the distance between the container 231 and the adsorption tank. The cover plate 236 also has mesh openings on its surface, and round holes for the screw 235 to enter and exit are opened at the four corners of the cover plate 236. After the cover plate 236 is placed on the filter cloth 234, the screw 235 passes through the round holes. The nut 238 connects to the screw 235, which stably connects the cover plate 236 to the container 231. This also facilitates the later cleaning and replacement of the activated carbon 233 inside the container 231, ensuring that the filtration speed of the activated carbon 233 is maintained and the adsorption efficiency of the activated carbon 233 is stabilized when purifying large quantities of mine water.

[0064] Combination Figure 2 and Figure 5 The lifting assembly 24 includes a winch 241 mounted on top of the cable tray 112, a wire rope 242 fixed at one end to the winch 241, and multiple hooks 243 movably connected to the wire rope 242. The hooks 243 are evenly spaced along the length of the wire rope 242. There are two sets of lifting assemblies 24, located on opposite sides above the opening of the adsorption tank. The handle 237 has an arc-shaped section in the middle, with the arc-shaped opening facing the cover plate 236. The hooks 243 can hook onto the arc-shaped section to lift the adsorption assembly 23.

[0065] In this embodiment, four sets of adsorption components 23 are provided, with the bottommost container 231 located above the second submersible mixer 22. The connection between the outlet pipe 170 and the front adsorption tank 21 is located between the two lower containers 231. This reduces sludge deposition at the bottom of the front adsorption tank 21, facilitating stable operation of the second submersible mixer 22. As the mine water rises from bottom to top in the front adsorption tank 21, the adsorption components 23 effectively block sludge in the mine water and enhance the adsorption of sludge and other impurities, thereby significantly reducing the impurity content in the mine water discharged from the front adsorption tank 21 and facilitating subsequent purification treatment of the mine water.

[0066] Combination Figure 1 , Figure 5 and Figure 7 The hardening and defluorination unit 3 includes a hardening and defluorination box 31 mounted on the base plate 111 and located on the side of the front adsorption tank 21 away from the water collection tank 110; an inlet pipe 32 fixed at one end and connected to the top of the hardening and defluorination box 31, with the other end located inside the front adsorption tank 21; a second lifting pump 33 located inside the front adsorption tank 21 and fixed to the end of the inlet pipe 32; a first dosing mechanism 34 located at the top of the hardening and defluorination box 31 for adding chemicals to the hardening and defluorination box 31; and a first stirring mechanism 35 located at the top of the hardening and defluorination box 31 for stirring the mine water inside the hardening and defluorination box 31. The hardening and defluorination box 31 is a long box, and the length direction of the hardening and defluorination box 31 is parallel to the length direction of the base plate 111. Four sets of the first stirring mechanism 35 are evenly spaced along the length direction of the hardening and defluorination box 31. The second lift pump 33 is located above the uppermost adsorption component 23. The inlet pipe 32 is a flexible pipe, which facilitates the removal of the second lift pump 33 from the opening of the front adsorption tank 21 before the lifting component 24 lifts the adsorption component 23. The first dosing mechanism 34 stores defluorinating agents, alkali solutions, sodium carbonate, flocculants, coagulants, and other agents to remove calcium and magnesium ions and fluoride ions from the mine water. When the mine water enters the hardening and defluorination tank 31, various agents are added to the hardening and defluorination tank 31. Under the stirring action of the first stirring mechanism 35, the agents react with the ionic impurities in the mine water, thereby removing the ionic impurities from the water.

[0067] The first dosing mechanism 34 includes multiple dosing tanks mounted on top of the hardening and defluorination tank 31, a dosing pump connected to the dosing tanks, and a float flow meter installed inside the dosing tanks. The dosing tanks and the dosing pumps are connected by pipelines, and the dosing pumps are also connected to the hardening and defluorination tank 31 by pipelines. The float flow meter allows for real-time observation of the defluorination agent entering the hardening and defluorination tank 31.

[0068] Combination Figure 7 and Figure 8 The first stirring mechanism 35 includes a gantry frame 351 mounted on the top surface of the hardening and defluorination chamber 31, a first driving component 352 mounted on the gantry frame 351 and located on the top surface of the hardening and defluorination chamber 31, a first stirring element 353 whose upper end is rotatably connected to the output end of the first driving component 352 and located inside the hardening and defluorination chamber 31, a second driving component 354 mounted on the top surface of the hardening and defluorination chamber 31 and whose driving end is drively connected to the upper end of the first stirring element 353, and an adjusting component 355 mounted on the top surface of the hardening and defluorination chamber 31 and cooperating with the second driving component 354. Multiple sets of first stirring mechanisms 35 are spaced apart along the length of the top of the hardening and defluorination chamber 31, and the rotation directions of adjacent sets of first stirring mechanisms 35 are opposite.

[0069] Reference Figure 7 The gantry frame 351 is U-shaped with its opening facing the top surface of the hardening and defluorination removal box 31. Both ends of the gantry frame 351 are fixed to the top surface of the hardening and defluorination removal box 31. The first drive component 352 includes a first drive motor 3521 fixedly mounted on the upper part of the gantry frame 351 and rotatably mounted on the gantry frame 351; a drive disk 3522 fixedly connected to the output shaft of the first drive motor 3521 and located between the gantry frame 351 and the top surface of the hardening and defluorination removal box 31; and a fixed cylinder 3523 passing through and fixed to the drive disk 3522. The axis of the fixed cylinder 3523 is parallel to the axis of the drive disk 3522, and the fixed cylinder 3523 and the drive disk 3522 are eccentrically arranged. The output shaft of the first drive motor 3521 is perpendicular to the top surface of the hardening and defluorination removal box 31 and the axial direction of the drive disk 3522.

[0070] Reference Figure 8The first stirring element 353 includes a first rotating shaft 3531 whose upper end passes through a fixed cylinder 3523, two first bearings 3532 sleeved on the first rotating shaft 3531 and spaced apart, and a first stirring wing 3533 and a second stirring wing 3534 mounted on the first rotating shaft 3531 from top to bottom along its length. The inner ring of the first bearing 3532 is fixedly connected to the first rotating shaft 3531, and the outer rings of the two first bearings 3532 are fixedly connected to the upper and lower ends of the fixed cylinder 3523, so that the first rotating shaft 3531 is rotatably disposed within the fixed cylinder 3523. A circular hole is provided at the top of the hardening and defluorination box 31, and the first rotating shaft 3531 is located in the circular hole. In this embodiment, two first stirring wings 3533 and two stirring wings 3534 are provided, and the first stirring wings 3533 and the second stirring wings 3534 are alternately arranged and spaced apart along the length of the first rotating shaft 3531.

[0071] Reference Figure 8 The first stirring blade 3533 includes a circular plate 35331 coaxially mounted on a first rotating shaft 3531, and a bent plate 35332 integrally formed at the edge of the circular plate 35331. Multiple bent plates 35332 are machined around the edge of the circular plate 35331, and these plates are alternately positioned on both sides of the surface of the circular plate 35331. Multiple concentric through holes 35333 are formed around the center of the circular plate 35331 on its surface, with each concentric circle containing multiple through holes, and adjacent concentric circles of through holes 35333 being staggered. As the first stirring blade 3533 rotates with the first rotating shaft 3531, the through holes 35333 create cavities within the mine water. After the defluorinating agent enters these cavities, the contact area between the defluorinating agent, alkali solution, flocculant, and other agents and the mine water is increased, thereby enhancing the speed at which the agents remove calcium and magnesium ions and fluoride ions from the mine water. After the second stirring fin 3534 rotates, it can push the mine water towards the first stirring fin 3533, causing the mine water to circulate from bottom to top within the hardening and defluorination tank 31. This, combined with the first stirring fin 3533, further enhances the reaction rate of the reagent in removing ionic impurities. The first stirring fin 3533 and the second stirring fin 3534 in the multiple sets of first stirring components 353 are arranged in a staggered manner, significantly increasing the stirring position of the stirring components on the mine water within the hardening and defluorination tank 31. This allows the defluorinating agent to come into more thorough contact with the ionic impurities in the mine water, effectively improving the reaction rate between the reagent and the ionic impurities.

[0072] Combination Figure 7 and Figure 8The second drive component 354 includes a second drive motor 3541 fixedly mounted on the gantry frame 351 and spaced apart from the first drive motor 3521, a drive sprocket 3542 sleeved and fixedly connected to the output shaft of the second drive motor 3541, a driven sprocket 3543 sleeved and fixedly connected to the first rotating shaft 3531, and a chain 3544 wound around the drive sprocket 3542 and the driven sprocket 3543. The output shaft of the second drive motor 3541 is arranged facing upwards away from the top surface of the hardening and defluorination box 31. The drive sprocket 3542 and the driven sprocket 3543 are located at the same horizontal height. The driven sprocket 3543 is located below the drive disc 3522 and spaced apart from the first bearing 3532.

[0073] Reference Figure 8 The adjusting component 355 includes a limiting groove 3551 fixedly mounted on the top surface of the hardening and defluorination chamber 31, a limiting pulley 3552 rolling within the limiting groove 3551, an L-shaped connecting rod 3553, and an adjusting sprocket 3555 rotatably mounted on the connecting rod 3553. Both ends of the limiting groove 3551 are not closed, and its opening faces away from the top surface of the hardening and defluorination chamber 31. The length direction of the limiting groove 3551 coincides with the center line of the line connecting the farthest distance between the first rotating shaft 3531 and the output shaft of the second drive motor 3541. The end of the limiting groove 3551 closest to the first rotating shaft 3531 is spaced apart from the first rotating shaft 3531.

[0074] One end of the connecting rod 3553 is fixedly connected to a second bearing 3554, and the end of the connecting rod 3553 is fixedly connected to the outer ring of the second bearing 3554. The inner ring of the second bearing 3554 is sleeved on the first rotating shaft 3531 and located below the drive disc 3522. The second bearing 3554 is located between the driven sprocket 3543 and the lower end of the fixed cylinder 3523. The end of the connecting rod 3553 away from the first rotating shaft 3531 is rotatably connected to the limiting pulley 3552. The adjusting sprocket 3555 is rotatably mounted on the connecting rod 3553 and located above the limiting pulley 3552. The adjusting sprocket 3555 and the drive sprocket 3542 are at the same horizontal height, and the chain 3544 is wound around the adjusting sprocket 3555 and meshes with it.

[0075] When the distance between the first rotating shaft 3531 and the output shaft of the second drive motor 3541 is at its minimum, the limiting pulley 3552 abuts against the end of the limiting groove 3551 away from the driven gear; when the distance between the first rotating shaft 3531 and the output shaft of the second drive motor 3541 is at its maximum, the limiting pulley 3552 abuts against the end of the limiting groove 3551 near the driven gear. The drive sprocket 3542, the driven sprocket 3543, and the adjusting sprocket 3555 are always arranged in a triangle. As the first rotating shaft 3531 rotates with the drive disc 3522, it can stably drive the limiting pulley 3552 to move within the two ends of the limiting groove 3551.

[0076] While the first drive motor 3521 drives the first rotating shaft 3531 to revolve within the hardening and defluorination box 31, the second drive motor 3541 causes the first rotating shaft 3531 to rotate within the hardening and defluorination box 31. This allows the first rotating shaft 3531, the first stirring fin 3533, and the second stirring fin 3534 to simultaneously stir and agitate the mine water within the hardening and defluorination box 31 at multiple locations, further enhancing the reaction rate between the reagent and ionic impurities and increasing the working speed of mine water purification treatment.

[0077] Reference Figure 7 In addition to the hard fluoride removal box 31, a first sludge conveying pump 36 connected to the hard fluoride removal box 31 is fixedly installed at the bottom. A first sludge conveying pipe 37 is connected to the sludge conveying pump 36. One end of the first sludge conveying pipe 37 is fixedly connected to the first sludge conveying pump 36 and is used to discharge the mine water in the hard fluoride removal box 31.

[0078] Combination Figure 3 and Figure 9 The sedimentation unit 4 includes a first sedimentation tank 41, a second sedimentation tank 42, and a third sedimentation tank 43, which are sequentially arranged on the base plate 111 and located at the end of the hardening and defluorination box 31 away from the front adsorption tank 21. The line connecting the three is perpendicular to the length direction of the hardening and defluorination box 31. Each sedimentation tank has an open top and a conical bottom. The end of the first sludge conveying pipe 37 away from the first sludge conveying pump 36 is fixed to the open end of the first sedimentation tank 41 to transport the mine water in the hardening and defluorination box 31 to the first sedimentation tank 41 for sedimentation treatment. A second sludge conveying pipe 411 is installed at the bottom outside the first sedimentation tank 41. A second sludge conveying pump 412 is installed on the second sludge conveying pipe 411. One end of the second sludge conveying pipe 411 is fixed to the first sedimentation tank 41 and communicates with its interior. The other end of the second sludge conveying pipe 411 is fixed to and communicates with the sludge dewatering machine 8.

[0079] Reference Figure 9 A first return pump 413 is installed inside the open portion of the first sedimentation tank 41. A first return pipe 414 is connected to the first return pump 413. The end of the first return pipe 414 away from the first return pump 413 is fixedly connected to and communicates with the water collection tank 110. When supernatant is formed in the first sedimentation tank 41, the first return pump 413 can be started to return the supernatant to the pre-adsorption tank 21 for repeated purification of the mine water, thereby improving the purification efficiency of the mine water. A third lift pump 415 is also installed inside the first sedimentation tank 41. A first delivery pipe 416 is connected to the third lift pump 415. The end of the first delivery pipe 416 away from the third lift pump 415 is connected to the intermediate water tank unit 5.

[0080] Reference Figure 9A third sludge conveying pipe 421 is installed at the bottom of the second sedimentation tank 42. A third sludge conveying pump 422 is installed on the third sludge conveying pipe 421. One end of the third sludge conveying pipe 421 is fixed to the second sedimentation tank 42 and communicates with its interior. The other end of the third sludge conveying pipe 421 is fixed to and communicates with the sludge dewatering machine 8. A second return pump 423 is installed inside the open part of the second sedimentation tank 42. A second return pipe 424 is connected to the second return pump 423. The end of the second return pipe 424 away from the second return pump 423 is fixed to and communicates with the AO unit tank 7. A fourth lift pump 425 is also installed inside the second sedimentation tank 42. A second conveying pipe 426 is connected to the fourth lift pump 425. The end of the second conveying pipe 426 away from the fourth lift pump 425 is communicated with the intermediate water tank unit 5.

[0081] Reference Figure 9 A fourth sludge conveying pipe 431 is installed at the bottom of the outer part of the settling tank. A fourth sludge conveying pump 432 is installed on the fourth sludge conveying pipe 431. One end of the fourth sludge conveying pipe 431 is fixedly connected to the third sedimentation tank 43 and communicates with its interior. The other end of the fourth sludge conveying pipe 431 is fixedly connected to and communicates with the sludge dewatering machine 8. A third return pump 433 is installed inside the open opening of the third sedimentation tank 43. A third return pipe 434 is connected to the third return pump 433. The end of the third return pipe 434 away from the third return pump 433 is fixedly connected to and communicates with the front adsorption tank 21. A fourth return pump 435 is installed inside the open opening of the third sedimentation tank 43. A fourth return pipe 436 is connected to the fourth return pump 435. The end of the fourth return pipe 436 away from the fourth return pump 435 is fixedly connected to and communicates with the rear adsorption tank 25. The second sedimentation tank 42 is also equipped with a fifth lift pump 437. The fifth lift pump 437 is connected to a third delivery pipe 438. The end of the third delivery pipe 438 away from the fifth lift pump 437 is connected to the clear water tank 10.

[0082] Reference Figure 10 Second stirring mechanisms 44 are respectively installed in the first sedimentation tank 41, the second sedimentation tank 42, and the electrostatic sedimentation tank. Each second stirring mechanism 44 includes a horizontal plate 441 positioned at the opening of the sedimentation tank; a third drive motor 442 mounted on the upper part of the horizontal plate 441 with a second rotating shaft 443 perpendicular to the surface of the horizontal plate 441; a vertically positioned rotating shaft 443 with its upper end fixed to the output shaft of the third drive motor 442; multiple first stirring plates 444 positioned horizontally with one end fixed to the circumference of the second rotating shaft 443; and a second stirring plate 445 installed at the lower end of the second rotating shaft 443. The surfaces of the first stirring plates 444 are parallel to the axial direction of the second rotating shaft 443, and two sets of the multiple first stirring plates 444 are symmetrically arranged with the axial direction of the second rotating shaft 443 as the center line. The second stirring plate 445 is V-shaped with its V-shaped opening facing the lower end of the second rotating shaft 443, and its outer edge is in contact with the conical inner bottom of the sedimentation tank.

[0083] Reference Figure 3 The intermediate water tank unit 5 includes a first intermediate water tank 51 disposed on the base plate 111 and spaced apart from the first sedimentation tank 41, and a second intermediate water tank 52 disposed on the base plate 111 and adjacent to the water collection tank 110 and the front adsorption tank 21. The end of the first delivery pipe 416 away from the third lift pump 415 is fixedly connected to and communicates with the first intermediate water tank 51. The first intermediate water tank 51 is equipped with a first water pump 511. The first water pump 511 is connected to a first water pipe 512. One end of the first water pipe 512 is fixedly connected to the first water pump 511, and the other end is fixedly connected to the ozone catalytic oxidation unit 6. The end of the second delivery pipe 426 away from the fourth lift pump 425 is fixedly connected to and communicates with the second intermediate water tank 52. The second intermediate water tank 52 is equipped with a second water pump 521. The second water pump 521 is connected to a second water pipe 522. One end of the second water pipe 522 is fixedly connected to the second water pump 521, and the other end of the second water pipe 522 is fixedly connected to and communicates with the sulfur autotrophic tank 9.

[0084] Combination Figure 11 and Figure 12 The ozone catalytic oxidation unit 6 includes a front ozone catalytic oxidation tank 61 mounted on a base plate 111 and located on the side of the first intermediate water tank 51 away from the sedimentation tank, and a rear ozone catalytic oxidation tank 62 mounted on a base plate 111 and located on the side of the second intermediate water tank 52 away from the collection tank 110. The front ozone catalytic oxidation tank 61 and the first intermediate water tank 51 are located on the same side of the base plate 111 along its length, and the rear ozone catalytic oxidation tank 62 and the second intermediate water tank 52 are arranged at intervals. The other end of the first water supply pipe 512 is fixedly connected to and communicates with the front ozone catalytic oxidation tank 61. A first ozone generator 611 is installed on the front ozone catalytic oxidation tank 61, and a second ozone generator 621 is installed on the rear ozone catalytic oxidation tank 62. The hydroxyl radicals generated by ozone further remove COD, thereby improving the biodegradability of the mine wastewater.

[0085] Reference Figure 11 Inside the pre-ozone catalytic oxidation tank 61, a third water pump 612 and a third water pipe 613 are installed. One end of the third water pipe 613 is fixedly connected to the third water pump 612, and the other end is fixedly connected to and communicates with the AO unit tank 7. Inside the post-ozone catalytic oxidation tank 62, a fourth water pump 622 and a fourth water pipe 623 are installed. One end of the fourth water pipe 623 is fixedly connected to the fourth water pump 622, and the other end is fixedly connected to and communicates with the post-adsorption tank 25.

[0086] Reference Figure 13The AO unit tank 7 is located on the base plate 111. The AO unit tank 7 and the first intermediate water tank 51 are adjacent to the preceding ozone catalytic oxidation tank 61, and the AO unit tank 7 is located on the other side of the length of the base plate 111. The AO unit tank 7 is equipped with a dissolved oxygen meter 71, a first ORP meter 72, a third submersible mixer 73, an aeration fan 74, and an aeration disc 75. The third submersible mixer 73 is suspended in the middle of the AO unit tank 7, and the aeration disc 75 is located inside the AO unit tank 7. An air inlet pipe is installed at the top of the aeration disc 75, and the aeration fan 74 is installed on the air inlet pipe at the top of the AO unit tank 7. Several exhaust holes are opened along the circumference of the bottom of the aeration disc 75. The mine water treated in the preceding steps, combined with the different environmental conditions of the anaerobic, anoxic, and aerobic zones, utilizes the biodegradation capabilities of microorganisms to gradually decompose and oxidize organic matter and pollutants such as ammonia and phosphorus in the wastewater, thereby achieving the purpose of purifying the mine wastewater. The AO unit tank 7 is equipped with a third water pump 76, and a fifth water pipe 77 is fixedly connected to the third water pump 76. The end of the fifth water pipe 77 away from the third water pump 76 is fixedly connected to and communicates with the second sedimentation tank 42.

[0087] Combination Figure 3 and Figure 9 The sludge dewatering machine 8 is mounted on the base plate 111, located between the sedimentation unit 4, the first intermediate water tank 51, and the AO unit tank 7. A fifth sludge conveying pipe 81 is externally connected to the sludge dewatering machine 8, and a fifth sludge conveying pump 82 is installed on the fifth sludge conveying pipe 81. The sludge dewatering machine 8 dries the sludge, and the dried sludge can be discharged for external disposal via the fifth sludge conveying pump 82 and the fifth sludge conveying pipe 81. A filtrate recovery pump 83 is installed inside the sludge dewatering machine 8, and a filtrate recovery pipe 84 is connected to the filtrate recovery pump 83. One end of the filtrate recovery pipe 84 is fixedly connected to the filtrate recovery pump 83, and the other end is fixedly connected to the bottom of the collection tank 110 and communicates with the interior of the collection tank 110.

[0088] Reference Figure 14A second ORP meter 91 is installed inside the sulfur autotrophic tank 9. This meter measures the oxidation-reduction potential (ORP value) of the water to understand its self-purification capacity, biological activity, and water quality. During wastewater treatment, changes in the ORP value can be used to assess the activity and efficiency of the biological treatment unit, guiding adjustments to aeration and chemical dosage, and optimizing the wastewater treatment process. A sulfur autotrophic packing mechanism 92 is installed at the top of the sulfur autotrophic tank 9, with the same structure as the chemical dosing mechanism. A backwash water pump 93 is installed inside the sulfur autotrophic tank 9. A sixth water supply pipe 94 is connected to the backwash water pump 93, with one end fixedly connected to the backwash water pump 93 and the other end fixedly connected to the post-ozone catalytic oxidation tank 62. The backwash water pump 93 provides backwash water to the sulfur autotrophic tank 9, helping it restore its filtration capacity. By increasing the amount of packing material in the sulfur autotrophic tank 9, the backwash water pump 93 improves the filtration effect and water production without increasing the flow rate or filtration cycle.

[0089] Reference Figure 1 The skid-mounted device also includes an electrical control system 12, which includes a PLC cabinet 121, a frequency converter cabinet 122, a power distribution cabinet 123, and an instrument box 124, which are sequentially mounted on the base plate 111 and electrically connected to each other. The electrical control system 12 provides stable power to the components of the skid-mounted device, such as the lift pump, motor, dosing mechanism, and sludge conveying pump, and performs precise control of the entire skid-mounted device, effectively improving the automation level of the skid-mounted device and improving the efficiency of mine water treatment.

[0090] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An integrated skid-mounted device for removing COD and total nitrogen from mine water, characterized in that: It includes a water collection unit (1), an adsorption unit (2), a hardening and defluorination unit (3), a sedimentation unit (4), an intermediate water tank unit (5), an ozone catalytic oxidation unit (6), an AO unit tank (7), a sludge dewatering machine (8), and a sulfur autotrophic tank (9) connected in sequence. The water collection unit (1) includes an outlet pipe (170) with one end connected to the inside of the water collection unit (1). The adsorption unit (2) includes a front adsorption tank (21) with an open top, multiple sets of adsorption components (23) that are movable and spaced apart vertically within the front adsorption tank (21), and a lifting component (24) disposed above the front adsorption tank (21) for lifting the adsorption components (23). The other end of the water outlet pipe (170) is fixed and connected to the front adsorption tank (21), and the connection between the water outlet pipe (170) and the front adsorption tank (21) is located above the bottom adsorption component (23). A second lift pump (33) is provided inside the opening of the front adsorption tank (21) and above the uppermost adsorption component (23). The second lift pump (33) is equipped with an inlet pipe (32) for discharging mine water from the front adsorption tank (21). The inlet pipe (32) is a flexible pipe. The adsorption assembly (23) includes a container (231) with a mesh opening at the bottom and an open top, a sponge pad (232) fixedly disposed on the outer wall of the container (231), activated carbon (233) placed inside the container (231) and flush with the opening, a filter cloth (234) laid between the activated carbon (233) and the opening of the container (231), and a cover plate (236) detachably connected to the container (231) for covering the opening. 6) Mesh holes are provided on the plate surface. The length and width of the container (231) are smaller than the length and width of the opening of the front adsorption tank (21). The thickness of the sponge pad (232) is greater than the distance between the container (231) and the front adsorption tank (21). The lifting end of the lifting component (24) is detachably connected to the cover plate (236). A second submersible mixer (22) is provided at the bottom of the front adsorption tank (21). The second submersible mixer (22) is located below the bottommost adsorption component (23).

2. The integrated skid-mounted device for removing COD and total nitrogen from mine water according to claim 1, characterized in that: The cover plate (236) is equipped with handles (237) on opposite sides. The handles (237) have an arc-shaped section in the middle, and the opening of the arc-shaped section faces the cover plate (236). A hook (243) is installed on the lifting end of the lifting assembly (24), and the hook (243) can hook onto the arc segment.

3. The integrated skid-mounted device for removing COD and total nitrogen from mine water according to claim 1, characterized in that: The end of the inlet pipe (32) away from the front adsorption tank (21) is connected to a hardening and defluorination box (31), and a first stirring mechanism (35) is installed on the hardening and defluorination box (31). The first stirring mechanism (35) includes a gantry frame (351) with both ends fixed to the top of the defluorination and de-icing box (31), a first driving component (352) disposed on the gantry frame (351), a first stirring element (353) rotatably connected to the output end of the first driving component (352), a second driving component (354) installed on the top of the defluorination box and driving the first stirring element (353), and an adjusting component (355) installed on the top of the defluorination box for adjusting the second driving component (354); The first drive unit (352) includes a drive disc (3522) suspended below the gantry (351) and located between the gantry (351) and the defluorination box; The first stirring component (353) includes a first rotating shaft (3531) rotatably mounted on the drive disk (3522) and whose axial direction is parallel to the axis of the drive disk (3522), a first stirring fin (3533) and a second stirring fin (3534) spaced from top to bottom along the axis of the first rotating shaft (3531); The second drive component (354) includes a drive sprocket (3542) suspended and installed below the gantry frame (351), a driven sprocket (3543) sleeved and fixed to the first rotating shaft (3531) and located below the drive disc (3522), and a chain (3544). The adjusting component (355) adjusts the chain (3544) to always be engaged with the drive sprocket (3542) and the driven sprocket (3543).

4. The integrated skid-mounted device for removing COD and total nitrogen from mine water according to claim 3, characterized in that: The adjusting component (355) includes a limiting groove (3551) fixed to the top of the defluorination box, a connecting rod (3553) with one end rolled in the limiting groove (3551) and the other end rotatably connected to the first rotating shaft (3531), and an adjusting sprocket (3555) rotatably mounted on the connecting rod (3553). The chain (3544) is wound around and meshes with the driving sprocket (3542), the driven sprocket (3543), and the adjusting sprocket (3555) to drive... The sprocket (3542), driven sprocket (3543), and adjusting sprocket (3555) are always arranged in a triangle. When the distance between the driving sprocket (3542) and the driven sprocket (3543) is the smallest, the adjusting sprocket (3555) is located at the end of the limiting groove (3551) away from the driving disk (3522). When the distance between the driving sprocket (3542) and the driven sprocket (3543) is the largest, the adjusting sprocket (3555) is located at the end of the limiting groove (3551) close to the driving disk (3522).

5. The integrated skid-mounted device for removing COD and total nitrogen from mine water according to claim 3, characterized in that: The first stirring blade (3533) includes a circular plate (35331) coaxially fixed to a first rotating shaft (3531) and a bent plate (35332) fixed to the edge of the circular plate (35331). Multiple bent plates (35332) are arranged around the outer diameter of the circular plate (35331). The multiple bent plates (35332) are located on both sides of the two plates of the circular plate (35331). Through holes (35333) are opened on the plate surface of the circular plate (35331). The second stirring fin (3534) can push water flow toward the first stirring fin (3533).

6. The integrated skid-mounted device for removing COD and total nitrogen from mine water according to claim 1, characterized in that: The adsorption unit (2) also includes a post-adsorption tank (25); The sedimentation unit (4) is equipped with four reflux pumps and reflux pipes connected to the reflux pumps. Two reflux pipes are connected to the front adsorption tank (21), one reflux pipe is connected to the rear adsorption tank (25), and the other reflux pipe is connected to the AO unit tank (7).

7. An integrated skid-mounted device for removing COD and total nitrogen from mine water according to any one of claims 1-6, characterized in that: The AO unit pool (7) is equipped with a dissolved oxygen meter (71), a first ORP meter (72), a third submersible mixer (73), an aeration blower (74), and an aeration disc (75). The third submersible mixer (73) is suspended in the middle of the AO unit pool (7), the aeration disc (75) is set inside the AO unit pool (7), and the aeration blower (74) is installed on the top of the AO unit pool (7) and connected to the top of the aeration disc (75).

8. An integrated skid-mounted device for removing COD and total nitrogen from mine water according to any one of claims 1-6, characterized in that: The sulfur autotrophic tank (9) is equipped with a second ORP instrument (91), and a sulfur autotrophic packing mechanism (92) is installed on the top of the sulfur autotrophic tank (9). A backwash water pump (93) is installed in the sulfur autotrophic tank (9). A sixth water supply pipe (94) is connected to the backwash water pump (93). One end of the sixth water supply pipe (94) is fixedly connected to the backwash water pump (93), and the other end is fixedly connected to and communicates with the post-ozone catalytic oxidation tank (62).

9. An integrated skid-mounted device for removing COD and total nitrogen from mine water according to any one of claims 1-6, characterized in that: The water collection unit (1) includes a water collection tank (110) with an open top, an inlet pipe (120) with one end connected to the inside of the water collection tank (110), a first electromagnetic flow meter (130) installed on the inlet pipe (120), an inlet pump (140) installed on the other end of the inlet pipe (120), a first submersible mixer (150) suspended inside the water collection tank (110), a first lift pump (160) installed inside the water collection tank (110), an outlet pipe (170) with one end fixedly connected to the first lift pump (160) and the other end extending from the open end of the water collection tank (110) to the outside, a second electromagnetic flow meter (180) installed on the outlet pipe (170), and a level gauge (190) installed on the inner wall of the water collection tank (110).

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