Multi-stage acid mine wastewater adsorption device

Abstract

The utility model relates to the technical field of wastewater treatment equipment, in particular to a multi-stage acid mine wastewater adsorption device which comprises an adsorption box, two first operation openings are formed in the top of the adsorption box, first positioning plates are arranged on the inner wall of the adsorption box and located at the front ends and the rear ends of the first operation openings, and an adsorption box is connected between the two first positioning plates. A second operation opening is formed in the top of the adsorption box, second positioning plates are arranged on the positions, located on the front side and the rear side of the second operation opening, of the inner wall of the adsorption box, and a plurality of hollowed-out plates are connected between the two second positioning plates. According to the multi-stage acid mine wastewater adsorption device, through the arrangement of the multi-stage adsorption units, efficient removal of various pollutants in wastewater is achieved, the first-stage adsorption unit can effectively remove organic substances and part of heavy metal ions, and the second-stage adsorption unit selectively adsorbs the heavy metal ions; the third-stage adsorption unit is used for efficiently removing trace heavy metal ions and other harmful substances.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wastewater treatment equipment, specifically to multistage acid mine wastewater adsorption device. BACKGROUND

[0002] Mining is a resource-intensive industry, although it provides important resource support for economic development, but also brings serious environmental problems. Mine wastewater, especially acid mine wastewater, is one of the main sources of mine environmental pollution. The generation of acid mine wastewater is mainly due to the oxidation reaction of sulfur-containing minerals (such as pyrite, galena, etc.) in the process of mining, processing and exposure to air and water, generating sulfuric acid and metal ions. These acid wastewater usually has the following characteristics:

[0003] 1. Strong acidity: pH value is usually less than 3, and even close to 0 in severe cases. This strong acidic environment is not only harmful to the ecosystem, but also causes corrosion to mine equipment.

[0004] 2. High heavy metal content: Acid mine wastewater often contains a large amount of heavy metal ions such as iron, copper, zinc, lead, cadmium, chromium, nickel, etc. These heavy metal ions are toxic and can accumulate through the food chain, endangering human and other biological health.

[0005] 3. High sulfate content: Due to the oxidation of minerals to generate sulfuric acid, this type of wastewater usually contains high concentrations of sulfate, further increasing the difficulty of treatment.

[0006] Currently, the methods for treating acid mine wastewater mainly include:

[0007] 1. Chemical precipitation method: by adding lime, sodium hydroxide and other alkaline substances to neutralize acid wastewater, generating metal hydroxide precipitate. Although this method can effectively reduce the acidity and heavy metal content of wastewater, it requires a large amount of chemical reagents, and the treatment and disposal of precipitate is also a problem.

[0008] 2. Biological treatment method: using sulfate-reducing bacteria and other microorganisms to reduce sulfate to sulfide, thereby reducing the sulfate and heavy metal ions in the wastewater. This method is environmentally friendly, but the treatment time is long, and the operating conditions are demanding.

[0009] 3. Membrane separation method: using reverse osmosis, nanofiltration and other membrane technologies to remove pollutants in wastewater. Although the separation effect is significant, membrane pollution and high operating cost limit its large-scale application.

[0010] 4. Adsorption method: using adsorption materials to adsorb and remove heavy metal ions and other pollutants in wastewater, which has the advantages of high efficiency, economy and simple operation, and has received more and more attention in recent years.

[0011] However, a single adsorption material often has poor effect in treating complex acid mine wastewater, and it is difficult to remove multiple pollutants at the same time, in view of this, a multi-stage acid mine wastewater adsorption device is provided. Practical new type content

[0012] The utility model discloses a multi-stage acid mine wastewater adsorption device to solve the problems in the above background technology.

[0013] To achieve the above object, the utility model provides the following technical scheme:

[0014] The multi-stage acid mine wastewater adsorption device includes an adsorption box, which is the main structure of the whole adsorption device and contains and supports all internal components, a water inlet pipe is arranged at the left side of the adsorption box and close to the top to provide a channel for wastewater to enter the adsorption box, a control valve is arranged to adjust the water inlet flow, a water outlet pipe is arranged at the bottom of the right side of the adsorption box to provide an outlet channel for treated wastewater, and a control valve is arranged to adjust the water outlet flow, two first operation openings are arranged at the top of the adsorption box and close to the left side, which are arranged in a left-right symmetrical manner to facilitate the maintenance, replacement and inspection of the first adsorption unit by the operator through the openings, and first positioning plates are arranged at the inner wall of the adsorption box and located at the front and rear ends of the first operation openings to fix and position the adsorption box and ensure the position and stability of the adsorption box.

[0015] The adsorption box is detachably connected between the two first positioning plates arranged in front of and behind each other, the left and right sides of the adsorption box are provided with anti-dropping nets to prevent the adsorption material from falling off from the adsorption box and maintain the effectiveness and integrity of the adsorption material, the left adsorption box is filled with activated carbon particles as a first adsorption unit, the activated carbon is a mature adsorption material with high specific surface area and strong adsorption capacity, which can effectively remove organic matter and part of heavy metal ions in wastewater, and the right adsorption box is filled with ion exchange resin as a second adsorption unit, the ion exchange resin is a mature material with large adsorption capacity and high efficiency for selectively adsorbing heavy metal ions such as copper, zinc and lead, and first sealing members are arranged at the two first operation openings to seal the first operation openings and prevent wastewater leakage and external pollution.

[0016] The second operation port is arranged at the top of the adsorption box and close to the right side, and is used for the maintenance, replacement and inspection of the third adsorption unit by the operator, the second positioning plates are arranged on the inner wall of the adsorption box and at the front and back sides of the second operation port, a plurality of hollow plates arranged in a left-right equidistant manner are detachably connected between the two second positioning plates, the surface of the hollow plate is sprayed with an adsorbent, the adsorbent is nano iron oxide, nano aluminum oxide or the like, is evenly coated on the surface of the hollow plate, the coating thickness is 0.1-0.5mm, the nano material adsorbent has high specific surface area and strong adsorption capacity, and can efficiently remove trace heavy metal ions and other harmful substances in the wastewater, the hollow plates serve as the third adsorption unit, and a proper spacing, such as 1-2cm, is kept between the hollow plates to increase the contact area of the adsorption material and the wastewater, and the second sealing element is arranged at the second operation port and is used for sealing the second operation port to prevent the leakage of the wastewater and the pollution from the outside.

[0017] Preferably, the water inlet pipe and the water outlet pipe are both provided with control valves for controlling the opening and closing and flow of the water inlet pipe and the water outlet pipe.

[0018] Preferably, the first U-shaped grooves are arranged on the opposite sides of the two first positioning plates arranged opposite to each other, and the rectangular positioning plates are arranged on the front and back sides of the adsorption box and are matched with the first U-shaped grooves, and the rectangular positioning plates are arranged in the first U-shaped grooves to ensure the stable installation and positioning of the adsorption box.

[0019] Preferably, the top of the adsorption box protrudes from the top of the adsorption box, and lifting holes are arranged on the front and back sides of the adsorption box and close to the top to facilitate the operator to use the lifting equipment to lift the adsorption box, so as to replace the adsorption material in the adsorption box and improve the operation efficiency and safety.

[0020] Preferably, the second U-shaped grooves are arranged on the opposite sides of the two second positioning plates, and the strip-shaped positioning blocks are arranged on the front and back sides of the hollow plate and are matched with the second U-shaped grooves, and the strip-shaped positioning blocks are arranged in the second U-shaped grooves to ensure the stable positioning of the hollow plate in the adsorption box.

[0021] Preferably, the first sealing element comprises a first frame-shaped base fixedly connected to the top of the adsorption box and serving as a basic component of the first sealing element, the bottom of the adsorption box passes through the first frame-shaped base into the adsorption box, and a box cover is detachably connected to the top of the first frame-shaped base and is sleeved on the top of the adsorption box to seal the top of the adsorption box and prevent the leakage of the wastewater and the falling of the adsorption material.

[0022] Preferably, the middle part of the top of the inner wall of the box cover is provided with a connecting vertical rod for connecting the box cover and the first pressing plate, ensuring its stability, and the bottom end of the connecting vertical rod is provided with the first pressing plate, and the outer wall of the first pressing plate is provided with a first frame-shaped sealing rubber, and the outer wall of the first frame-shaped sealing rubber is tightly combined with the inner wall of the adsorption box, providing a sealing effect to prevent wastewater from leaking upward through the opening of the adsorption box.

[0023] Preferably, the top of the box cover is provided with two first handles arranged in front and back symmetry, facilitating the disassembly and installation of the box cover by the operator and improving the operation convenience.

[0024] The bottom of the outer wall of the box cover is provided with a frame-shaped connecting plate, circular holes a are formed in the bottom of the frame-shaped connecting plate and near the four corners, first threaded columns are arranged on the top of the first frame-shaped base and near the four corners, and first fastening nuts are threadedly connected to the first threaded columns and pass through the circular holes a, so that the first threaded columns are fastened by the first fastening nuts, ensuring the stability and sealing performance of the first sealing element.

[0025] Preferably, the second sealing element comprises a second frame-shaped base fixedly connected to the top of the adsorption box, serving as a basic component of the second sealing element, the top of the second frame-shaped base is provided with a detachable cover plate, the bottom of the cover plate is provided with a second pressing plate, the bottom of the second pressing plate abuts against the top of the hollow plate, and the outer wall of the second pressing plate is provided with a second frame-shaped sealing rubber, and the outer wall of the second frame-shaped sealing rubber is tightly combined with the inner wall of the second operation port, providing a sealing effect to prevent wastewater from leaking through the second operation port.

[0026] Preferably, the top of the cover plate is provided with two second handles arranged in front and back symmetry, facilitating the disassembly and installation of the cover plate by the operator and improving the operation convenience.

[0027] Circular holes b are formed in the bottom of the cover plate and near the four corners, second threaded columns are arranged on the top of the second frame-shaped base and near the four corners, and second fastening nuts are threadedly connected to the second threaded columns and pass through the circular holes b, so that the second threaded columns are fastened by the second fastening nuts, ensuring the stability and sealing performance of the second sealing element.

[0028] Compared with the prior art, the utility model has the advantages that:

[0029] 1. The multistage acid mine wastewater adsorption device can efficiently remove various pollutants in wastewater through the arrangement of the multistage adsorption units, the first adsorption unit can effectively remove organic substances and part of heavy metal ions, the second adsorption unit selectively adsorbs heavy metal ions, and the third adsorption unit efficiently removes trace heavy metal ions and other harmful substances, and the synergistic effect of the adsorption materials at all levels makes the device have high removal efficiency and wide applicability.

[0030] 2、The multistage acid mine wastewater adsorption device, through the first operation port and the second operation port, the operator can conveniently maintain, replace and check each adsorption unit. The adsorption box and the hollowed plate are detachable, which facilitates the replacement and maintenance of the adsorption material, reduces the downtime of the device and improves the operation efficiency.

[0031] 3、The multistage acid mine wastewater adsorption device is provided with a sealing element at the operation port, so that a good sealing effect is achieved, wastewater leakage and external pollution are prevented, the safety of the operator is protected, and environmental pollution is avoided.

[0032] 4、The multistage acid mine wastewater adsorption device has a large contact area between the adsorption material in the adsorption box and the wastewater, thereby increasing the adsorption efficiency. The hollowed plates are kept at a proper distance, so that the adsorption material can fully contact with the wastewater, and the removal effect of the pollutants is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a whole structure schematic view of the utility model;

[0034] Figure 2 It is a whole exploded structure schematic view of the utility model;

[0035] Figure 3 It is a whole structure schematic view of the utility model Figure 2 It is a structure enlarged schematic view of A in the utility model;

[0036] Figure 4 It is a cross-sectional structure schematic view of the adsorption box in the utility model;

[0037] Figure 5 It is an internal assembly structure schematic view of the adsorption box in the utility model;

[0038] Figure 6 It is a partial structure schematic view of the first sealing element in the utility model;

[0039] In the figure: 1, adsorption box; 10, water inlet pipe; 11, water outlet pipe; 12, first operating port; 13, second operating port; 14, first positioning plate; 140, first U-shaped groove; 15, second positioning plate; 150, second U-shaped groove; 2, adsorption box; 20, anti-off net; 21, rectangular positioning plate; 22, lifting hole; 3, hollow plate; 30, strip-shaped positioning block; 4, first sealing element; 40, first frame-shaped base; 41, first threaded column; 42, box cover; 43, frame-shaped connecting plate; 430, circular hole a; 44, connecting vertical rod; 45, first pressing plate; 46, first frame-shaped sealing rubber; 47, first fastening nut; 48, first handle; 5, second sealing element; 50, second frame-shaped base; 51, second threaded column; 52, cover plate; 520, circular hole b; 53, second pressing plate; 54, second frame-shaped sealing rubber; 55, second fastening nut; 56, second handle. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] Please refer to Figures 1-6 The present application provides a technical solution:

[0043] The multi-stage acid mine wastewater adsorption device comprises an adsorption box 1 serving as the main structure of the whole adsorption device and containing and supporting all internal components, a water inlet pipe 10 provided at the left side of the adsorption box 1 and close to the top to provide a channel for wastewater to enter the adsorption box 1 and provided with a control valve to adjust the water inflow, a water outlet pipe 11 provided at the bottom of the right side of the adsorption box 1 to provide an outlet channel for the treated wastewater and provided with a control valve to adjust the water outflow, two first operation openings 12 provided at the top of the adsorption box 1 and close to the left side to facilitate the maintenance, replacement and inspection of the first-stage adsorption unit by the operator through the openings, and first positioning plates 14 provided at the inner wall of the adsorption box 1 and located at the front and rear ends of the first operation openings 12 to fix and position the adsorption box 2 and ensure the position and stability of the adsorption box 2.

[0044] The two first positioning plates 14 are detachably connected with the adsorption box 2, the left and right sides of the adsorption box 2 are provided with anti-dropping nets 20 to prevent the adsorption material from falling off from the adsorption box 2 and maintain the effectiveness and integrity of the adsorption material, the left adsorption box 2 is filled with activated carbon particles as the first-stage adsorption unit, the activated carbon is a mature adsorption material with high specific surface area and strong adsorption capacity and can effectively remove organic substances and part of heavy metal ions in the wastewater, the right adsorption box 2 is filled with ion exchange resin as the second-stage adsorption unit, the ion exchange resin is a mature material with large adsorption capacity and high efficiency for selectively adsorbing heavy metal ions such as copper, zinc and lead, and the two first operation openings 12 are provided with first sealing members 4 to seal the first operation openings 12 and prevent the wastewater from leaking and being polluted from the outside.

[0045] The top of the adsorption box 1 is provided with a second operation opening 13 close to the right side for the operator to perform the maintenance, replacement and inspection of the third-stage adsorption unit through the opening, the inner wall of the adsorption box 1 is provided with second positioning plates 15 located at the front and rear sides of the second operation opening 13, a plurality of hollow plates 3 are detachably connected between the two second positioning plates 15 and arranged equidistantly left and right, the surface of the hollow plate 3 is sprayed with an adsorbent, the adsorbent is nano iron oxide or nano aluminum oxide, is uniformly coated on the surface of the hollow plate 3 with a coating thickness of 0.1-0.5 mm, the nano material adsorbent has high specific surface area and strong adsorption capacity and can efficiently remove trace heavy metal ions and other harmful substances in the wastewater, the hollow plate 3 serves as the third-stage adsorption unit, and the hollow plates 3 are kept at a proper distance, such as 1-2 cm, to increase the contact area of the adsorption material with the wastewater, and the second operation opening 13 is provided with a second sealing member 5 to seal the second operation opening 13 and prevent the wastewater from leaking and being polluted from the outside.

[0046] In this embodiment, the water inlet pipe 10 and the water outlet pipe 11 are provided with control valves to control the opening and closing and flow of the water inlet pipe 10 and the water outlet pipe 11.

[0047] Specifically, the opposite sides of the two first positioning plates 14 arranged opposite to each other are each provided with a first U-shaped groove 140, and the front and rear sides of the adsorption box 2 are each provided with a rectangular positioning plate 21 matched with the first U-shaped groove 140, the rectangular positioning plate 21 is located in the first U-shaped groove 140, to ensure stable installation and positioning of the adsorption box 2.

[0048] Further, the top of the adsorption box 2 protrudes from the top of the adsorption box 1, and the front and rear sides of the adsorption box 2 and close to the top are each provided with a lifting hole 22, which is convenient for the operator to use the lifting equipment to lift the adsorption box 2, so as to replace the adsorption material in the adsorption box 2, and improve the operation efficiency and safety.

[0049] Further, the opposite sides of the two second positioning plates 15 are each provided with a plurality of second U-shaped grooves 150 arranged equidistantly left and right, and the front and rear sides of the hollow plate 3 are each provided with a strip-shaped positioning block 30 matched with the second U-shaped groove 150, the strip-shaped positioning block 30 is located in the second U-shaped groove 150, to ensure stable positioning of the hollow plate 3 in the adsorption box 1.

[0050] Further, the first sealing member 4 includes a first frame-shaped base 40 fixedly connected to the top of the adsorption box 1, which is a basic component of the first sealing member 4, the bottom of the adsorption box 2 passes through the first frame-shaped base 40 into the adsorption box 1, and the top of the first frame-shaped base 40 is detachably connected with a box cover 42, the box cover 42 is sleeved on the top of the adsorption box 2, seals the top of the adsorption box 2, prevents waste water from leaking and the adsorption material from falling off.

[0051] Further, the inner wall of the box cover 42 is provided with a connecting vertical rod 44 at the middle of the top, which is used to connect the box cover 42 and a first pressing plate 45, to ensure stability, and the bottom end of the connecting vertical rod 44 is provided with the first pressing plate 45, and the outer wall of the first pressing plate 45 is provided with a first frame-shaped sealing rubber 46, the outer wall of the first frame-shaped sealing rubber 46 is tightly combined with the inner wall of the adsorption box 2, to provide sealing effect, preventing waste water from leaking upward through the opening of the adsorption box 2.

[0052] Further, the top of the box cover 42 is provided with two first handles 48 arranged symmetrically front and rear, which is convenient for the operator to detach and install the box cover 42, to improve operation convenience.

[0053] The bottom of the outer wall of the box cover 42 is provided with a frame-shaped connecting plate 43, the bottom of the frame-shaped connecting plate 43 and close to the positions of four corners are each provided with a circular hole a430, the top of the first frame-shaped base 40 and close to the positions of four corners are each provided with a first threaded column 41, the first threaded column 41 passes through the circular hole a430 and is threadedly connected with a first fastening nut 47, the first fastening nut 47 fastens the first threaded column 41 through thread connection, to ensure stability and sealing performance of the first sealing member 4.

[0054] Further, the second sealing member 5 comprises a second frame-shaped base 50 fixedly connected to the top of the adsorption box 1, serving as a basic component of the second sealing member 5, the top of the second frame-shaped base 50 is provided with a detachable cover plate 52, the bottom of the cover plate 52 is provided with a second pressing plate 53, the bottom of the second pressing plate 53 abuts against the top of the hollow plate 3, the outer wall of the second pressing plate 53 is provided with a second frame-shaped sealing rubber 54, the outer wall of the second frame-shaped sealing rubber 54 is tightly combined with the inner wall of the second operation port 13, providing a sealing effect, preventing wastewater from leaking through the second operation port 13.

[0055] Further, the top of the cover plate 52 is provided with two second handles 56 symmetrically arranged front and back, facilitating the disassembly and installation of the cover plate 52 by the operator, improving the operation convenience.

[0056] The bottom of the cover plate 52 and the positions close to the four corners are all provided with circular holes b520, the top of the second frame-shaped base 50 and the positions close to the four corners are all provided with second threaded columns 51, the second threaded columns 51 pass through the circular holes b520 and are threadedly connected with second fastening nuts 55, the second fastening nuts 55 fasten the second threaded columns 51 through threaded connection, ensuring the stability and sealing performance of the second sealing member 5.

[0057] The multi-stage acid mine wastewater adsorption device of the embodiment is used as follows: the device is installed at a suitable wastewater treatment position, the adsorption box 1 is ensured to be placed stably, the water inlet pipe 10 and the water outlet pipe 11 are connected tightly, then, the adsorption material is prepared, the activated carbon particles are filled into the left adsorption box 2 as a first adsorption unit, the activated carbon is ensured to be uniformly distributed, the ion exchange resin is filled into the right adsorption box 2 as a second adsorption unit, the resin is ensured to be uniformly distributed, the adsorbent such as nano iron oxide or nano aluminum oxide is sprayed on the surface of the plurality of hollow plates 3 as a third adsorption unit, the coating thickness is kept at 0.1-0.5 millimeters, then, the adsorption box 2 filled with the adsorption material is fixed between the first positioning plates 14 in the adsorption box 1, the position of the adsorption box is ensured to be stable, the hollow plate 3 sprayed with the adsorbent is fixed between the second positioning plates 15 in the adsorption box 1, the appropriate spacing (1-2 centimeters) between the hollow plates is kept, the first sealing member 4 and the second sealing member 5 are used to seal the first operation port 12 and the second operation port 13, the leakage is ensured to be avoided, the water inlet system is started, the control valve on the water inlet pipe 10 is opened, the water inlet flow is adjusted, the acid mine wastewater enters the adsorption box 1, the wastewater first passes through the adsorption box 2 filled with the activated carbon particles, the organic substances and part of the heavy metal ions in the wastewater are removed, then, the wastewater passes through the adsorption box 2 filled with the ion exchange resin, the heavy metal ions such as copper, zinc and lead are selectively adsorbed, finally, the wastewater passes through the hollow plate 3 coated with the nano iron oxide or nano aluminum oxide adsorbent, trace heavy metal ions and other harmful substances are further removed, the control valve on the water outlet pipe 11 is opened, the water outlet flow is adjusted, the treated wastewater is smoothly discharged from the device, through the above steps, the multi-stage acid mine wastewater adsorption device can be used efficiently and safely, and the ideal wastewater treatment effect is achieved.

[0058] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only preferred examples of the present application, and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage acidic mine wastewater adsorption device, comprising an adsorption tank (1), characterized in that: A water inlet pipe (10) is provided on the left side and near the top of the adsorption box (1), and a water outlet pipe (11) is provided at the bottom right side of the adsorption box (1). Two first operating ports (12) are symmetrically arranged on the top and near the left side of the adsorption box (1). A first positioning plate (14) is provided on the inner wall of the adsorption box (1) at both ends of the first operating port (12). An adsorption box (2) is detachably connected between the two first positioning plates (14) arranged opposite each other. Anti-detachment nets (20) are provided on both the left and right sides of the adsorption box (2). The adsorption box (2) on the left is filled with... The adsorption box (2) on the right is filled with activated carbon particles and ion exchange resin. A first sealing element (4) is provided at each of the two first operating ports (12). A second operating port (13) is provided at the top of the adsorption box (1) and near the right side. A second positioning plate (15) is provided on the inner wall of the adsorption box (1) and at the front and rear sides of the second operating port (13). A plurality of hollow plates (3) arranged equidistantly on the left and right are detachably connected between the two second positioning plates (15). The surface of the hollow plate (3) is sprayed with adsorbent. A second sealing element (5) is provided at the second operating port (13).

2. The multi-stage acidic mine wastewater adsorption device according to claim 1, characterized in that: Both the inlet pipe (10) and the outlet pipe (11) are equipped with control valves.

3. The multi-stage acidic mine wastewater adsorption device according to claim 1, characterized in that: The two first positioning plates (14) arranged in opposite directions are provided with first U-shaped grooves (140) on their opposite sides. The front and rear sides of the adsorption box (2) are provided with rectangular positioning plates (21) that are adapted to the first U-shaped grooves (140). The rectangular positioning plates (21) are located in the first U-shaped grooves (140).

4. The multi-stage acidic mine wastewater adsorption device according to claim 1, characterized in that: The top of the adsorption box (2) protrudes from the top of the adsorption box (1), and hanging holes (22) are provided on both the front and rear sides of the adsorption box (2) and near the top.

5. The multi-stage acidic mine wastewater adsorption device according to claim 1, characterized in that: The two second positioning plates (15) each have multiple second U-shaped grooves (150) arranged equidistantly on opposite sides. The hollow plate (3) has strip-shaped positioning blocks (30) on both the front and rear sides that are adapted to the second U-shaped grooves (150). The strip-shaped positioning blocks (30) are located in the second U-shaped grooves (150).

6. The multi-stage acidic mine wastewater adsorption device according to claim 1, characterized in that: The first sealing element (4) includes a first frame-shaped base (40) fixedly connected to the top of the adsorption box (1). The bottom of the adsorption box (2) passes through the first frame-shaped base (40) into the adsorption box (1). The top of the first frame-shaped base (40) is detachably connected to a box cover (42), which is fitted onto the top of the adsorption box (2).

7. The multi-stage acidic mine wastewater adsorption device according to claim 6, characterized in that: A connecting vertical rod (44) is provided at the middle of the top of the inner wall of the box cover (42). A first pressure plate (45) is provided at the bottom of the connecting vertical rod (44). A first frame-shaped sealing rubber (46) is provided on the outer wall of the first pressure plate (45). The outer wall of the first frame-shaped sealing rubber (46) is tightly fitted to the inner wall of the adsorption box (2).

8. The multi-stage acidic mine wastewater adsorption device according to claim 6, characterized in that: The top of the box cover (42) is provided with two first handles (48) arranged symmetrically in front and behind. The bottom of the outer wall of the box cover (42) is provided with a frame-shaped connecting plate (43). The bottom of the frame-shaped connecting plate (43) and near the four corners are provided with circular holes a (430). The top of the first frame-shaped base (40) and near the four corners are provided with first threaded posts (41). The first threaded posts (41) pass through the circular holes a (430) and are threadedly connected to the first fastening nuts (47).

9. The multi-stage acidic mine wastewater adsorption device according to claim 1, characterized in that: The second sealing element (5) includes a second frame-shaped base (50) fixedly connected to the top of the adsorption box (1). The top of the second frame-shaped base (50) is provided with a detachable cover plate (52). The bottom of the cover plate (52) is provided with a second pressure plate (53). The bottom of the second pressure plate (53) abuts against the top of the hollow plate (3). The outer wall of the second pressure plate (53) is provided with a second frame-shaped sealing rubber (54). The outer wall of the second frame-shaped sealing rubber (54) is tightly fitted with the inner wall of the second operating port (13).

10. The multi-stage acidic mine wastewater adsorption device according to claim 9, characterized in that: The top of the cover plate (52) is provided with two second handles (56) arranged symmetrically in front and behind. The bottom of the cover plate (52) and near the four corners are provided with circular holes b (520). The top of the second frame-shaped base (50) and near the four corners are provided with second threaded posts (51). The second threaded posts (51) pass through the circular holes b (520) and are threadedly connected to the second fastening nuts (55).

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