Acid mine gushing water treatment system

Abstract

The utility model provides an acid mine gushing water treatment system. The treatment system comprises a mine gushing water pretreatment mechanism and a multi-stage filler treatment mechanism, wherein the mine gushing water pretreatment mechanism comprises a mine hole, a plugging unit arranged at a hole opening of the mine hole and used for plugging the mine hole, and a first filler unit filled in the mine hole; the multi-stage filler treatment mechanism comprises a tank body communicated with the mine hole, a permeable partition wall which is arranged in the tank body and divides the accommodating space of the tank body into a plurality of sub-accommodating spaces, a second filler unit arranged in the tank body, and a water outlet pipe mounted at one end, far away from the mine hole, of the tank body; the plurality of sub-accommodating spaces comprise a precipitation space which is closest to the plugging unit and is communicated with the mine hole and a plurality of filler accommodating spaces, and the second filler unit comprises a plurality of fillers which are respectively filled in the plurality of filler accommodating spaces. The mine gushing water treatment system provided by the utility model has the advantages of small occupied area, low operation cost and the like.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to an acidic mine water treatment system. Background Technology

[0002] Currently, commonly used mine water treatment technologies mainly include physical methods (such as sedimentation, filtration, membrane separation, etc.), chemical methods (such as coagulation, oxidation-reduction, electrolytic oxidation, and electrodialysis, etc.), biological methods, and constructed wetland methods. However, these treatment methods either require large land areas, have high energy consumption, are complicated to operate and maintain, have unstable effluent quality, or require large amounts of chemicals and have high operating costs. Utility Model Content

[0003] The purpose of this invention is to address the technical problems of existing mine water treatment methods, such as large footprint, high energy consumption, high operating costs, and complicated operation and maintenance, and to provide an improved mine water treatment system with advantages such as small footprint and low operating costs.

[0004] To achieve the above objectives, this utility model provides an acidic mine inrush water treatment system. The treatment system includes a mine inrush water pretreatment mechanism and a multi-stage packing treatment mechanism. The mine inrush water pretreatment mechanism includes a mine tunnel, a sealing unit located at the entrance of the mine tunnel and sealing the mine tunnel, and a first packing unit filled inside the mine tunnel. The multi-stage packing treatment mechanism includes a pool body communicating with the mine tunnel, a permeable partition wall located inside the pool body and dividing the pool body's containing space into multiple sub-containing spaces, a second packing unit located inside the pool body, and an outlet pipe installed at the end of the pool body away from the mine tunnel. The multiple sub-containing spaces include a sedimentation space closest to the sealing unit and communicating with the mine tunnel, and multiple packing space containing materials. The second packing unit includes multiple packing materials respectively filled in the multiple packing space containing materials.

[0005] In one specific embodiment, the first packing unit includes granular dolomite packing and blocky dolomite packing, wherein the granular dolomite packing is sandwiched between the sealing unit and the blocky dolomite packing.

[0006] In one specific embodiment, the number of packing accommodating spaces is 3 to 6, and at least three different types of packing are filled.

[0007] In one specific embodiment, the number of packing accommodating spaces is five, including a first packing accommodating space, a second packing accommodating space, a third packing accommodating space, a fourth packing accommodating space, and a fifth packing accommodating space arranged sequentially at intervals. The first packing accommodating space is arranged adjacent to the sedimentation space. The second packing unit includes block limestone filled in the first packing accommodating space, granular limestone filled in the second and third packing accommodating spaces, zeolite filled in the fourth packing accommodating space, and activated carbon filled in the fifth packing accommodating space.

[0008] In one specific embodiment, the calcium oxide content in the blocky limestone, granular limestone, and zeolite is 45% to 53%.

[0009] In one specific embodiment, the activated carbon is coal-derived granular activated carbon, and the iodine value of the activated carbon is greater than 800 mg / g.

[0010] In one specific embodiment, the sealing unit includes a sealing wall at the entrance of the mine tunnel, a waterproof mortar layer laid on the inner side of the sealing wall, three concrete grooves respectively located at the bottom end and both sides of the sealing wall, and three water-stop steel plates respectively installed in the three concrete grooves.

[0011] In one specific embodiment, the treatment system further includes a mine inrush water collection mechanism, which includes a mine inrush water collection pipe and an inspection well. The mine inrush water pretreatment mechanism also includes a mine drainage pipe, one end of which is connected to the mine inrush water collection pipe and the other end of which extends into the mine. The multi-stage filler treatment mechanism also includes an inlet pipe, one end of which is connected to the mine inrush water collection pipe and the other end of which extends into the sedimentation space. The mine drainage pipe is set higher than the inlet pipe to form a height difference so that the water in the mine can flow into the pool by gravity.

[0012] In one specific embodiment, the mine water pretreatment mechanism further includes a reverse filter bag installed at one end of the mine drainage pipe that extends into the mine.

[0013] In one specific embodiment, the pool body and the permeable partition wall adjacent to the mine shaft together form an regulating sedimentation tank, which includes the sedimentation space.

[0014] The beneficial effects of this utility model include at least the following:

[0015] I. The acidic mine inrush water treatment system provided by this utility model includes a mine inrush water pretreatment mechanism and a multi-stage packing treatment mechanism. The mine inrush water pretreatment mechanism includes a mine shaft, a sealing unit located at the entrance of the mine shaft and sealing the mine shaft, and a first packing unit filling the mine shaft. The multi-stage packing treatment mechanism includes a pool connected to the mine shaft, a permeable partition wall located within the pool and dividing the pool's containing space into multiple sub-containing spaces, a second packing unit located within the pool, and a water outlet pipe installed at the end of the pool furthest from the mine shaft. The multiple sub-containing spaces include a sedimentation space closest to the sealing unit and connected to the mine shaft, and multiple packing space containing spaces. The second packing unit... This system includes multiple packing materials, each filling a different packing space. On one hand, it seals the mine entrance and uses a first packing unit within the mine as a pretreatment mechanism for the mine inrush water, improving its pH value and reducing the footprint of subsequent treatment units. On the other hand, the multi-stage packing treatment system treats the mine inrush water through a second packing unit. The treatment process requires no added chemicals, eliminating the need for routine maintenance; only periodic replacement of the packing material is required. This results in low operating costs and simple management, making it particularly suitable for mine inrush water treatment in historically abandoned mining areas where the water is acidic, the volume is small, the mines are scattered, and the water is difficult to collect, and land is scarce.

[0016] II. In this utility model, the mine inrush water pretreatment mechanism and the multi-stage filler treatment mechanism are connected specifically through the mine drainage pipe of the mine inrush water pretreatment mechanism and the water inlet pipe of the multi-stage filler treatment mechanism. The mine drainage pipe is set higher than the water inlet pipe. In this way, the height difference between the two can be used to allow the pretreated mine water to flow by gravity into the regulating sedimentation tank through the mine drainage pipe, the mine inrush water collection pipe and the water inlet pipe in sequence. Then, it enters each filler space for treatment through the permeable partition wall in sequence. The acidic mine inrush water treatment system provided by this utility model does not require power throughout the entire process, and the purified water quality can meet the discharge requirements.

[0017] Third, the second packing unit includes block limestone filling the first packing space, granular limestone filling the second and third packing spaces, zeolite filling the fourth packing space, and activated carbon filling the fifth packing space. After sedimentation in the sedimentation tank, the mine water undergoes a neutralization reaction with the alkaline slow-release materials block limestone, granular limestone, and zeolite in sequence. After filtration, some pollutants are removed. Then, the high-iodine-value activated carbon further removes pollutants from the mine water, achieving the purpose of water quality purification.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0019] Figure 1 A schematic diagram of the pretreatment mechanism for mine inrush water in an acidic mine inrush water treatment system provided in an embodiment of this utility model from one angle;

[0020] Figure 2 A top view of the multi-stage packing treatment mechanism in an acidic mine water treatment system provided in an embodiment of this utility model;

[0021] Figure 3 This is a cross-sectional view of the multi-stage packing treatment mechanism in an acidic mine water treatment system provided in an embodiment of the present invention. Detailed Implementation

[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1 This utility model provides an acidic mine water treatment system, which is particularly suitable for the treatment of mine water in historical mining areas where the mine water is acidic, the water volume is small, the mines are scattered, the mine water is not easy to collect, and land is scarce.

[0024] Along the extension direction of the mine tunnel, the treatment system includes a mine water pretreatment mechanism 10, a mine water collection mechanism, and a multi-stage filler treatment mechanism 30 arranged in sequence. The mine water pretreatment mechanism 10 is formed by sealing the entrance of the mine tunnel, and the multi-stage filler treatment mechanism 30 is formed by excavating earth.

[0025] The mine water pretreatment mechanism 10 includes a mine tunnel 11, a sealing unit 12 located at the entrance of the mine tunnel 11 and sealing the mine tunnel 11, a first filler unit 13 filling the hole, a mine tunnel drainage pipe 14 with one end extending into the mine tunnel 11 and the other end extending out of the mine tunnel 11, and a filter bag 15 installed at one end of the mine tunnel water outlet pipe extending into the mine tunnel 11.

[0026] The sealing unit 12 includes a sealing wall 121 located at the entrance of the mine tunnel 11, a waterproof mortar layer 122 laid on the inner side of the sealing wall 121, three concrete grooves 123 located at the bottom end and both sides of the sealing wall 121, and three water-stop steel plates 124 respectively installed in the three concrete grooves 123.

[0027] In this utility model, the sealing wall 121 is a masonry sealing wall. During construction, the mortar joints of the masonry must be full and there must be no vertical through joints.

[0028] In this utility model, the inner surface of the sealing wall 121 refers to the water-facing surface of the sealing wall, which can also be understood as the surface of the sealing wall 121 that is away from the multi-stage filler treatment mechanism 30.

[0029] Preferably, the thickness of the waterproof mortar layer 122 is 20mm to 30mm.

[0030] Preferably, the first packing unit 13 includes granular dolomite packing 131 and blocky dolomite packing 132, wherein the granular dolomite packing 131 is sandwiched between the sealing unit 12 and the blocky dolomite packing 132.

[0031] In this invention, the blocky dolomite filler 132 is spaced apart from the end of the mine shaft 11 away from the sealing unit 12.

[0032] In this invention, the granular dolomite filler 131 and the blocky dolomite filler 132 can undergo a neutralization reaction with the mine inflow water, thereby increasing the pH value of the mine inflow water.

[0033] In this embodiment, the mine water outlet pipe 14 is a DN160 UPVC pipe.

[0034] In this utility model, the mine water outlet pipe 14 can drain the water flowing into the mine 11, and after the mine is sealed, it can also isolate some air, inhibit the oxidation of sulfur-containing ore, and improve the water quality of the mine water.

[0035] In this invention, the filter bag 15 is used to prevent the drain pipe 14 from becoming clogged.

[0036] In this invention, the mine water is pretreated by sealing the mine shaft and filling it with dolomite filler, which effectively utilizes the space of the mine shaft and reduces the footprint of subsequent treatment facilities.

[0037] The mine water collection mechanism includes a mine water collection pipe and an inspection well. The mine water collection pipe is used to connect the mine water pretreatment mechanism 10 and the multi-stage packing treatment mechanism 30. The inspection well facilitates the regular inspection and maintenance of the various pipes of the treatment system.

[0038] In this utility model, one end of the mine water collection pipe is connected to the mine outlet pipe 14, and the other end is connected to the multi-stage filler treatment mechanism 30.

[0039] Please see Figure 2 and Figure 3 The multi-stage filler treatment mechanism 30 includes a pool body 31 connected to the mine tunnel 11, multiple permeable partition walls 32 disposed within the pool body 31 and dividing the accommodating space 31A of the pool body 31 into multiple sub-accommodating spaces, a second filler unit 33 disposed within the pool body 31, an inlet pipe 34 connected at one end to the mine water collection pipe and extending into the pool body 31 at the other end, and an outlet pipe 35 installed at the end of the pool body 31 away from the mine tunnel 11.

[0040] In this utility model, the pool body 31 is a reinforced concrete pool body.

[0041] Along the direction from the water inlet end to the water outlet end of the pool body 31, a plurality of permeable partitions 32 are arranged at intervals.

[0042] In this invention, the height of the plurality of permeable partitions 32 is the same.

[0043] In this utility model, the permeable partition wall 32 is formed by constructing a porous permeable brick wall.

[0044] In this embodiment, there are 5 permeable partition walls 32, which divide the containment space 31A into 6 sub-containment spaces. Based on the function of the sub-containment spaces, the 6 sub-containment spaces are divided into sedimentation space and filler containment space.

[0045] In other embodiments, the number of permeable partitions 32 can be 3, 4, 6, etc. It is understood that different numbers of permeable partitions correspond to different numbers of sub-accommodation spaces, thus the number of filling material accommodation spaces will change.

[0046] Preferably, the number of permeable partitions 32 is 3 to 6, and correspondingly, the number of sub-accommodating spaces is 4 to 7.

[0047] Preferably, multiple sub-accommodating spaces are spaced apart along the water inlet to water outlet of the pool body, including a sedimentation space 311A ​​closest to the sealing unit and connected to the mine tunnel and multiple filler accommodating spaces 312A.

[0048] In this embodiment, the pool body 31 and the permeable partition wall 32 adjacent to the mine tunnel 11 together form an regulating sedimentation tank, which includes the sedimentation space 311A.

[0049] In this utility model, the mine water treated by the mine water treatment device 10 enters the sedimentation space 311A ​​of the regulating sedimentation tank after passing through the mine water outlet pipe, the mine water collection and management system, and the inlet pipe. Large particles are initially removed by sedimentation, and then the water enters the packing material receiving space through the permeable partition wall.

[0050] Preferably, the number of the packing accommodating spaces 312A is 3 to 6.

[0051] In this embodiment, there are five packing accommodating spaces 312A, including a first packing accommodating space, a second packing accommodating space, a third packing accommodating space, a fourth packing accommodating space and a fifth packing accommodating space arranged at intervals in sequence, with the first packing accommodating space located adjacent to the sedimentation space 311.

[0052] Preferably, the second packing unit 33 includes a plurality of packings, which are respectively filled in a plurality of packing accommodating spaces, and the kinds of the plurality of packings are not completely the same.

[0053] In this invention, each filler space is filled with one filler.

[0054] The number of the packing accommodating spaces 312A is 5. Correspondingly, the second packing unit 33 includes block limestone 331 filled in the first packing accommodating space, granular limestone 332 filled in the second and third packing accommodating spaces, zeolite 333 filled in the fourth packing accommodating space, and activated carbon 334 filled in the fifth packing accommodating space.

[0055] In this invention, the filling height of the block limestone 331, granular limestone 332, zeolite 333 and activated carbon 334 is lower than that of the permeable partition wall 32.

[0056] Preferably, the calcium oxide content in the blocky limestone 331, granular limestone 332 and zeolite 333 is 45%~53%, belonging to high-calcium limestone and high-calcium zeolite.

[0057] Preferably, the activated carbon 334 is coal-derived granular activated carbon, and the iodine value of the activated carbon is greater than 800 mg / g.

[0058] After sedimentation in the sedimentation tank, the mine water undergoes a neutralization reaction with alkaline slow-release materials, block limestone 331, granular limestone 332, and zeolite 333, and is filtered to remove some pollutants. Then, the pollutants in the mine water are further removed by the adsorption of activated carbon 334 with high iodine value, thus achieving the purpose of water quality purification.

[0059] Preferably, the water inlet pipe 34 is set lower than the mine drainage pipe 14, and the height difference between the two allows the water in the mine 11 to flow into the pool 31 by gravity, so that no power device is required.

[0060] In this embodiment, the water outlet pipe 35 is used to discharge the water treated by the activated carbon 334 into the pool.

[0061] Preferably, the inlet pipe 34 and the outlet pipe 35 are selected as DN200 or DN300 HDPE double-wall corrugated pipes according to the amount of water to be treated.

[0062] The construction method of the acidic mine water treatment system provided by this utility model includes the following steps:

[0063] Step 1, Mine cleaning: Clean up the sediment at the entrance of the mine and remove loose rocks at the entrance.

[0064] Step 2, Filler Placement: Place blocky dolomite filler and granular dolomite filler into the mine shaft from the inside out.

[0065] Step 3, Grooving and Water-stopping Steel Plate Installation: Grooves are set at the bottom and sides of the mine tunnel sealing point, and water-stopping steel plates are installed in the grooves before concrete is poured into the grooves.

[0066] Step 4, Mine tunnel sealing and waterproof mortar plastering: Construct a masonry sealing wall at the mine tunnel entrance. The mortar joints of the masonry must be full and there should be no vertical through joints. Apply a 20mm thick waterproof mortar plaster to the water-facing side of the masonry sealing wall.

[0067] Step 5: Installation of mine water inflow drainage pipe and filter bag: When the mine sealing wall is built to the reserved drainage pipe position, install the filter bag and mine drainage pipe. The mine drainage pipe adopts DN160 UPVC pipe.

[0068] Step 6, Pool Excavation and Pouring: After excavation, reinforced concrete is poured to obtain the pool body.

[0069] Step 7: Construct permeable partition walls: Construct multiple permeable partition walls arranged side by side in the pool body using porous permeable bricks.

[0070] Step 8: Packing installation: From the inlet end of the pool to the outlet end, install blocky high-calcium limestone, granular high-calcium limestone, high-calcium zeolite and high-iodine value activated carbon in sequence. The high-iodine value activated carbon is selected from coal-based granular activated carbon with well-developed pore structure, good adsorption performance, high mechanical strength, and an iodine value of not less than 800 mg / g.

[0071] Step 9: Installation of inlet and outlet pipes: Install the inlet and outlet pipes at the pre-reserved pipe openings in the permeable reaction tank. Select DN200 or DN300 HDPE double-wall corrugated pipes for the inlet and outlet pipes according to the amount of water to be treated.

[0072] Step 10, Pipe Connection: Connect the mine drainage pipe, mine water collection pipe, and water inlet pipe.

[0073] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions and substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An acid mine drainage treatment system characterized by, The processing system comprises: The mine gushing water pre-processing mechanism comprises a mine cave, a blocking unit arranged at the cave mouth of the mine cave and blocking the mine cave, and a first filler unit filled in the mine cave; The multi-stage filler processing mechanism comprises a pool body communicated with the mine cave, a water-permeable partition wall arranged in the pool body and separating the containing space of the pool body into multiple sub-containing spaces, a second filler unit arranged in the pool body, and a water outlet pipe installed at the end of the pool body away from the mine cave, wherein the multiple sub-containing spaces comprise a sedimentation space closest to the blocking unit and communicated with the mine cave and multiple filler containing spaces, and the second filler unit comprises multiple fillers respectively filled in the multiple filler containing spaces.

2. The acid mine drainage treatment system of claim 1, wherein, The first filler unit comprises granular dolomite filler and block dolomite filler, and the granular dolomite filler is arranged between the blocking unit and the block dolomite filler.

3. The acid mine drainage treatment system of claim 1, wherein, The number of the filler containing spaces is 3-6, and at least three different fillers are filled.

4. The acid mine drainage treatment system of claim 3, wherein, The number of the filler containing spaces is 5, comprising a first filler containing space, a second filler containing space, a third filler containing space, a fourth filler containing space and a fifth filler containing space arranged in sequence and at intervals, the first filler containing space is arranged adjacent to the sedimentation space, the second filler unit comprises block limestone filled in the first filler containing space, granular limestone filled in the second filler containing space and the third filler containing space, zeolite filled in the fourth filler containing space and activated carbon filled in the fifth filler containing space.

5. The acid mine drainage treatment system of claim 4, wherein, The content of calcium oxide in the block limestone, the granular limestone and the zeolite is 45%-53%.

6. The AMD treatment system of claim 4 or 5, wherein, The activated carbon is coal-made granular activated carbon, and the iodine value of the activated carbon is greater than 800 mg / g.

7. The AMD treatment system according to any one of claims 1 to 4, wherein The blocking unit comprises a blocking wall arranged at the cave mouth of the mine cave, a waterproof mortar layer laid on the inner side of the blocking wall, three concrete grooves respectively arranged at the bottom end of the blocking wall and the two sides of the blocking wall, and three water stop steel plates respectively installed in the three concrete grooves.

8. The AMD treatment system of claim 7, wherein, The processing system further comprises a mine gushing water collecting mechanism, the mine gushing water pre-processing mechanism further comprises a mine cave drainage pipe, one end of the mine cave drainage pipe is connected with the mine gushing water collecting pipeline and the other end extends into the mine cave; the multi-stage filler processing mechanism further comprises a water inlet pipe, one end of the water inlet pipe is connected with the mine gushing water collecting pipeline and the other end extends into the sedimentation space, and the mine cave drainage pipe is arranged higher than the water inlet pipe to form a height difference so that the water in the mine cave can flow into the pool body.

9. The acid mine drainage treatment system of claim 8, wherein, The mine gushing water pre-processing mechanism further comprises a filter bag installed at the end of the mine cave drainage pipe extending into the mine cave.

10. The acid mine drainage treatment system of claim 1, wherein, The pool body and the water-permeable partition wall arranged adjacent to the mine cave jointly form a regulating sedimentation pool, and the regulating sedimentation pool comprises the sedimentation space.

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