Mine water purification device

Abstract

The utility model provides a mine water purification device. Comprising a first filtering structure which comprises at least two filtering grooves, and a discharge port of one of the two adjacent filtering grooves is communicated with a liquid inlet of the other filtering groove; the second filtering structure is provided with a filtering cavity, a first inlet and a second inlet, the first inlet and the second inlet are communicated with the filtering cavity, the first inlet is located above the second inlet, and the first inlet is communicated with the discharge port of the other one of the at least two filtering grooves; each filter tank is filled with a filter medium; along the height direction of the filter tank, the discharge port of one of the two adjacent filter tanks is positioned above the liquid inlet of the other filter tank or is flush with the liquid inlet of the other filter tank, and the liquid inlet of each filter tank is positioned above the discharge port of each filter tank. According to the technical scheme provided by the utility model, the technical problem that the mine water in the prior art is relatively high in water turbidity and is inconvenient to use can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine water purification device technical field, specifically, relate to a mine water purification device. BACKGROUND

[0002] At present, due to the wave and spread of underground water system in the process of open-pit mining, thereby causing clean groundwater resources to sweep the clay, coal powder and other substances in the formation, so that the mine water is endowed with the water quality characteristics of high turbidity, the suspended solids in the mine water make the mine water not suitable for direct use in industrial production, agricultural irrigation, ecological water replenishment and other purposes, and even cause potential threat to aquatic ecosystems.

[0003] However, the traditional mine water treatment method, such as coagulation sedimentation, super magnetic separation, clarification filtration, etc., although can effectively reduce the turbidity of mine water, but these traditional treatment methods have high treatment cost, large energy consumption and complex equipment maintenance, which produces high equipment construction cost and energy consumption. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a mine water purification device to solve the technical problem that the mine water quality turbidity is high in the prior art and is not convenient to use.

[0005] In order to achieve the above purpose, the utility model provides a mine water purification device, comprising:

[0006] The first filter structure comprises at least two filter tanks, and the outlet of one of the two adjacent filter tanks is in communication with the liquid inlet of the other filter tank; the liquid inlet of one of the at least two filter tanks is used for passing in the liquid to be filtered;

[0007] The second filter structure has a filter chamber and a first inlet and a second inlet in communication with the filter chamber, the first inlet is located above the second inlet, the first inlet is in communication with the outlet of the other of the at least two filter tanks, and the second inlet is used for passing in air to remove bicarbonate in the liquid to be filtered by the contact of air and the liquid to be filtered;

[0008] Wherein, each filter tank is filled with filter medium; along the height direction of the filter tank, the outlet of one of the two adjacent filter tanks is located above or flush with the liquid inlet of the other filter tank, and the liquid inlet of each filter tank is located above the outlet of each filter tank.

[0009] Further, one of the two adjacent filter tanks is filled with first filter medium, and the other is filled with second filter medium, and the particle diameter of the first filter medium is greater than that of the second filter medium.

[0010] Further, the at least two filter grooves are arranged at intervals along a preset direction; the first filter structure further comprises a communication pipe, one end of the communication pipe is in communication with a discharge port of one of the adjacent two filter grooves, and the other end of the communication pipe is in communication with a liquid inlet of the other of the adjacent two filter grooves; and / or,

[0011] The at least two filter grooves comprise a first filter groove, a second filter groove and a third filter groove, the first discharge port of the first filter groove is in communication with the second liquid inlet of the second filter groove, the second discharge port of the second filter groove is in communication with the third liquid inlet of the third filter groove, and the third discharge port of the third filter groove is in communication with the first inlet; the first liquid inlet of the first filter groove is used for introducing the liquid to be filtered.

[0012] Further, the first filter structure is arranged on a mine zone, the mine zone has an inclined installation surface, the at least two filter grooves are inserted into the mine zone, and the at least two filter grooves are arranged at intervals along the extension direction of the installation surface of the mine zone; the first filter structure further comprises:

[0013] A seepage-proof membrane is arranged in the mine zone and surrounds a seepage-proof space, and the first filter structure is located in the seepage-proof space.

[0014] Further, the second filter structure comprises a first shell and a second shell arranged oppositely, the first shell and the second shell are connected to each other and surround a filter chamber, the first inlet is arranged on the first shell, and the second inlet is arranged on the second shell;

[0015] The first shell is in an arc shape; and / or,

[0016] The second filter structure further comprises a liquid distribution plate, the liquid distribution plate is arranged in the filter chamber and is arranged opposite to the first inlet, and a plurality of liquid distribution ports are arranged at intervals on the liquid distribution plate.

[0017] Further, the second filter structure comprises:

[0018] A third shell surrounds a gas collection chamber, and the gas collection chamber is in communication with the second inlet;

[0019] An air blower is in communication with the gas collection chamber at an air outlet end.

[0020] Further, the second filter structure further comprises:

[0021] An air compressor, an input port of the air compressor is in communication with the air outlet end of the air blower, and an output port of the air compressor is in communication with the gas collection chamber; and / or,

[0022] A gas guide pipe, one end of the gas guide pipe is located in the gas collection chamber, the other end of the gas guide pipe is inserted into the second inlet, and a flow adjusting member for adjusting the air flow into the second inlet is arranged on the gas guide pipe.

[0023] Further, the mine water purification device further comprises:

[0024] A water storage structure is arranged below the first filter structure, and the water storage structure encloses a water storage cavity, and the outlet of the other one of the at least two filter tanks and the first inlet are both in communication with the water storage cavity.

[0025] Further, the water storage structure comprises:

[0026] A filter screen is arranged on the water storage structure and located at the communication between the water storage cavity and the first inlet; and / or,

[0027] A water delivery pipe and a water pump, one end of the water delivery pipe is in communication with the water storage cavity, and the other end is in communication with the first inlet; the water pump is arranged on the water delivery pipe, and the opening degree of the outlet valve of the water pump is adjustably arranged.

[0028] Further, each filter tank is in a strip structure;

[0029] In the present application, the width of each filter tank is greater than or equal to 40cm and less than or equal to 60cm; and / or,

[0030] The height of each filter tank is greater than or equal to 180cm and less than or equal to 220cm.

[0031] The technical scheme of the present application, by arranging at least two filter tanks and filling filter medium, can gradually remove suspended solids when the mine water passes through the filter tanks, and significantly reduce the turbidity of the water body. Compared with the traditional treatment method of using a single filter tank, such a design can more comprehensively intercept and adsorb suspended particles in the mine water, improve the efficiency and effect of turbidity removal. Along the height direction of the filter tank, the layout design of the outlet and the liquid inlet utilizes natural gravity to realize the self-flowing transmission of the mine water between the filter tanks, without the need for additional pumping equipment, thereby significantly reducing energy consumption and operating costs. The introduction of the second filter structure can effectively remove bicarbonate in the mine water by destroying the carbonate balance system in the mine water through the contact between the filter chamber and the air. This method of blowing off bicarbonate through air can effectively remove bicarbonate in the mine water, which is particularly important for improving the irrigation and ecological water replenishment effect of the mine water. Therefore, the technical scheme of the present application can solve the technical problem of high turbidity of mine water in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings accompanying the specification of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1Part structure schematic view of the mine water purification device is shown according to the embodiment provided by the utility model;

[0034] Figure 2 Part structure schematic view of the mine water purification device is shown according to the embodiment provided by the utility model, Figure 1 Structure enlarged schematic view at A in the middle;

[0035] Figure 3 Structure schematic view of the second filter structure of the mine water purification device is shown according to the embodiment provided by the utility model,

[0036] Figure 4 Turbidity change broken line graph of liquid in the water storage cavity in the water storage process of the water storage structure of the mine water purification device is shown according to the embodiment provided by the utility model,

[0037] Figure 5 TDS value change broken line graph of liquid in the water storage cavity in the water storage process of the water storage structure of the mine water purification device is shown according to the embodiment provided by the utility model.

[0038] Among them, the above-mentioned drawing includes the following figure marks:

[0039] 1, first filter structure;

[0040] 11, filter groove;

[0041] 111, discharge port;

[0042] 112, liquid inlet;

[0043] 113, first filter groove;

[0044] 114, second filter groove;

[0045] 115, third filter groove;

[0046] 12, communication pipe;

[0047] 2, second filter structure;

[0048] 21, filter cavity;

[0049] 22, second inlet;

[0050] 23, first shell piece;

[0051] 24, second shell piece;

[0052] 25, third shell piece;

[0053] 26, air blower;

[0054] 27, air guide pipe;

[0055] 3, mine area;

[0056] 4. Geomembrane;

[0057] 5. Water storage structure. Detailed Implementation

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0059] like Figures 1 to 5 As shown, an embodiment of this utility model provides a mine water purification device, which includes a first filtration structure 1 and a second filtration structure 2. The first filtration structure 1 includes at least two filter tanks 11, with the outlet 111 of one of the two adjacent filter tanks 11 connected to the inlet 112 of the other; the inlet 112 of one of the at least two filter tanks 11 is used to introduce the liquid to be filtered. The second filtration structure 2 has a filter chamber 21 and a first inlet and a second inlet 22 connected to the filter chamber 21. The first inlet is located above the second inlet 22 and is connected to the outlet 111 of the other of the at least two filter tanks 11. The second inlet 22 is used to introduce air to remove bicarbonate from the liquid to be filtered through contact between the air and the liquid to be filtered. Each filter tank 11 is filled with filter media; along the height direction of the filter tank 11, the outlet 111 of one of two adjacent filter tanks 11 is located above or flush with the inlet 112 of the other filter tank 11, and the inlet 112 of each filter tank 11 is located above the outlet 111 of each filter tank 11.

[0060] The mine water purification device provided in this embodiment of the invention, by setting at least two filter tanks 11 and filling them with filter media, allows mine water to gradually remove suspended solids as it passes through these filter tanks 11, significantly reducing the turbidity of the water. Compared to the traditional treatment method using a single filter tank 11, this setup can more comprehensively intercept and adsorb suspended particles in the mine water, improving the efficiency and effectiveness of turbidity removal. The layout design of the outlet 111 and inlet 112 along the height direction of the filter tank 11 utilizes natural gravity to achieve gravity-driven transfer of mine water between the filter tanks 11, eliminating the need for additional pumping equipment and significantly reducing energy consumption and operating costs. The introduction of the second filter structure 2, through its filter chamber 21 contacting air, disrupts the carbonate balance system in the mine water, thereby effectively removing bicarbonate from the mine water. This method of removing bicarbonate through air stripping is effective in removing bicarbonate from mine water and is particularly important for improving the irrigation and ecological water replenishment effects of mine water. Therefore, the mine water purification device provided in this embodiment can solve the technical problem in the prior art that the mine water has high turbidity and is not easy to use.

[0061] Specifically, one of the two adjacent filter tanks 11 is filled with a first filter medium, and the other is filled with a second filter medium, the particle diameter of the first filter medium is larger than that of the second filter medium. With such a structure, the classification filtration of mine water is realized by filling filter media with different particle sizes in adjacent filter tanks 11. The first filter medium with larger particle size can first remove larger particles in the mine water, while the second filter medium with smaller particle size can remove smaller particles. This step-by-step filtration design greatly improves the efficiency and quality of mine water purification, ensuring the smooth progress of subsequent processing steps. At the same time, the use of filter media with different particle sizes avoids the clogging of coarse particle media by fine particles, prolongs the service life of the filter tank 11, and reduces the frequency of maintenance and cleaning.

[0062] Specifically, at least two filter tanks 11 are arranged in a predetermined direction; the first filter structure 1 further comprises a communication pipe 12, one end of the communication pipe 12 is connected with the discharge port 111 of one of the two adjacent filter tanks 11, and the other end is connected with the liquid inlet 112 of the other of the two adjacent filter tanks 11. In this way, the discharge port 111 and the liquid inlet 112 of adjacent filter tanks 11 are connected by the communication pipe 12, and the mine water can flow automatically between the filter tanks 11 by using the natural gravity, without the need for additional power devices such as water pumps, which not only simplifies the structure of the device, reduces energy consumption and operating costs, but also reduces the risk of equipment failure, improves the reliability and stability of the entire system.

[0063] Specifically, the communication pipe 12 is a metal pipe. The communication pipe 12 is a DN350 stainless steel pipe.

[0064] Specifically, the at least two filter tanks 11 include a first filter tank 113, a second filter tank 114, and a third filter tank 115, the first discharge port of the first filter tank 113 is connected with the second liquid inlet of the second filter tank 114, the second discharge port of the second filter tank 114 is connected with the third liquid inlet of the third filter tank 115, and the third discharge port of the third filter tank 115 is connected with the first inlet; the first liquid inlet of the first filter tank 113 is used to pass in the liquid to be filtered. In this way, through the series design of the first filter tank 113, the second filter tank 114 and the third filter tank 115, the mine water undergoes a step-by-step purification process from primary to depth. The first filter tank 113 removes large particles, the second filter tank 114 further removes medium-sized particles, and the third filter tank 115 is responsible for removing finer particles. Finally, the mine water filtered by the three-stage filtration enters the second filter structure 2 for depth treatment. This orderly filtration process ensures that the mine water has been pre-purified to the greatest extent before entering the subsequent processing steps, improving the processing capacity and efficiency of the entire purification device.

[0065] Specifically, the first filter tank 113 is filled with gravel, the second filter tank 114 is filled with coarse sand, and the third filter tank 115 is filled with fine sand. The particle diameter of the gravel is larger than that of the coarse sand, and the particle diameter of the coarse sand is larger than that of the fine sand.

[0066] Specifically, the first filter structure 1 is arranged on the mine area 3 having an inclined installation surface, and at least two filter tanks 11 are arranged in the mine area 3 and are arranged at intervals along the extension direction of the installation surface of the mine area 3. The first filter structure 1 further comprises a waterproof membrane 4 arranged in the mine area 3 and surrounding a waterproof space, and the first filter structure 1 is located in the waterproof space. With such a structure, the first filter structure 1 is arranged on the mine area having an inclined installation surface, which not only makes full use of the natural terrain and reduces the construction cost of the mine water purification device, but also realizes the natural flow of mine water between the filter tanks 11 with the aid of gravity, without the need for additional power equipment, thereby reducing energy consumption. The use of the waterproof membrane 4 further ensures that the water between the filter tanks 11 will not leak, protecting the surrounding environment, while avoiding the loss of filter media, ensuring the continuity and stability of the filtration process.

[0067] In the present embodiment, the second filter structure 2 comprises a first shell 23 and a second shell 24 arranged opposite to each other, the first shell 23 and the second shell 24 are connected to each other and surround a filter chamber 21, a first inlet is arranged on the first shell 23, and a second inlet 22 is arranged on the second shell 24. With such a structure, air can flow countercurrently with the liquid to be filtered in the filter chamber 21, increasing the gas-liquid contact area and contact time, and significantly improving the stripping efficiency, especially in removing high concentrations of bicarbonate in mine water. This design can break the carbonate balance system and accelerate the removal of bicarbonate, improving the water quality of mine water and providing a guarantee for subsequent reuse of mine water.

[0068] Specifically, the first shell 23 is in an arc shape. With such a structure, the arc shape can promote the distribution and circulation of air in the filter chamber 21, making the air contact with the water more uniform and enhancing the stripping effect, especially in removing bicarbonate, which can more effectively break the carbonate balance system and accelerate the removal of high concentrations of bicarbonate in mine water.

[0069] Specifically, the second filtering structure 2 further comprises a liquid distribution plate arranged in the filtering chamber 21 and opposite to the first inlet, and a plurality of liquid distribution openings are arranged on the liquid distribution plate. In this way, uniform distribution of mine water can be achieved, and the problem of insufficient purification caused by local concentration of water flow can be avoided. The design of a plurality of liquid distribution openings arranged on the liquid distribution plate allows the mine water to be uniformly sprayed, increases the contact area between the water and the air, and improves the filtering efficiency. At the same time, this design also helps to achieve uniform reverse contact between the air and the water, strengthens the stripping process, and ensures that bicarbonate in the mine water can be effectively removed.

[0070] Specifically, the second filtering structure 2 comprises a third shell 25 and a blower 26. The third shell 25 encloses a gas collection chamber, which is in communication with the second inlet 22. The air outlet end of the blower 26 is in communication with the gas collection chamber. With such a structure, the gas collection chamber enclosed by the third shell 25 in the second filtering structure 2 is in communication with the blower 26, which can ensure stable and sufficient air supply. The blower 26 sends compressed air into the gas collection chamber, and then the air enters the filtering chamber 21 through the second inlet 22. This design not only improves the stripping capacity of the air, but also controls the flow and pressure of the air, making the stripping process more controllable and enhancing the effect of removing bicarbonate. In addition, through the adjustment of the blower 26, the processing needs of different mine waters can be met, improving the flexibility and application range of the device.

[0071] Specifically, the second filtering structure 2 further comprises an air compressor, the input port of the air compressor is in communication with the air outlet end of the blower 26, and the output port of the air compressor is in communication with the gas collection chamber. With such a structure, the use of the air compressor provides high-pressure air, which can more effectively contact with the mine water, thereby breaking the bicarbonate balance system in the mine water and accelerating the removal of bicarbonate, especially when processing mine water with high concentration of bicarbonate, the purification efficiency can be significantly improved. The use of high-pressure air also ensures the stability and reliability of the stripping process, and reduces the impact on other beneficial components in the water.

[0072] Specifically, the second filtering structure 2 further comprises an air guide pipe 27, one end of which is located in the air collection chamber, and the other end of which is inserted at the second inlet 22, and a flow adjusting member is arranged on the air guide pipe 27 for adjusting the air flow into the second inlet 22. With such a structure, the combination of the air guide pipe 27 and the flow adjusting member not only ensures the uniform distribution of air in the filtering chamber 21, but also finely adjusts the air flow to adapt to different treatment requirements. This design enables the second filtering structure 2 to flexibly cope with changes in the quality of mine water, optimizes the stripping process by adjusting the gas-liquid ratio, and improves the pertinence and efficiency of mine water purification. The use of the flow adjusting member also avoids energy waste caused by excessive air input, achieving efficient and energy-saving gas stripping.

[0073] In the present embodiment, the mine water purification device further comprises a water storage structure 5 arranged below the first filtering structure 1, which encloses a water storage cavity, and the discharge outlet 111 of the other of the at least two filtering tanks 11 and the first inlet are in communication with the water storage cavity. With such a structure, the water storage structure 5 is arranged below the first filtering structure 1 to collect mine water that has been preliminarily filtered, and also provides a natural purification process for the mine water through its own sedimentation. At the same time, the arrangement of the water storage structure 5 solves the problem of seasonal water use in open-pit coal mines, and can store excess mine water resources in winter for use in the summer peak period, achieving seasonal storage and regulation of mine water, ensuring effective reuse of mine water, reducing water resource waste, and improving the flexibility and efficiency of water resource management.

[0074] Specifically, the water storage structure 5 is composed of underground sandstone. In this way, the structure of the water storage cavity can prolong the residence time of the mine water, and further remove suspended solids and part of the dissolved ions in the water by using the adsorption and filtration effect of the underground sandstone, thereby reducing the TDS value (concentration of dissolved solids). The sandstone component in the waste material discharged from the open-pit coal mine dump has the property of filtering suspended particles in water, and the clay minerals such as kaolin in it can adsorb part of the cations in water to reduce the TDS value of the water body.

[0075] Specifically, the water storage structure 5 comprises a filter screen arranged on the water storage structure 5 and located at the communication between the water storage cavity and the first inlet. With such a structure, the arrangement of the filter screen in the water storage structure 5 can effectively prevent the sandstone medium in the water storage cavity from entering the first inlet with the water flow, avoiding the problems of medium loss and clogging of the filtering chamber 21, and ensuring the continuity and stability of the filtering process. The design of the filter screen also facilitates regular cleaning, preventing the filter screen itself from reducing the filtering efficiency due to impurities accumulation, and maintaining the long-term efficient operation of the mine water purification device.

[0076] Specifically, the water storage structure 5 includes a water delivery pipe and a water pump. One end of the water delivery pipe is connected to the water storage chamber, and the other end is connected to the first inlet. The water pump is mounted on the water delivery pipe, and the opening of the pump's outlet valve is adjustable. This combination of the water delivery pipe and the water pump in the water storage structure 5 enables precise control of the water flow from the water storage chamber to the second filtration structure 2. The adjustable outlet valve of the water pump allows for flexible adjustment of the water flow rate according to actual treatment needs, ensuring that the gas-liquid ratio during the stripping process is within the optimal range and improving the bicarbonate removal efficiency. Furthermore, this design avoids energy waste caused by excessive pumping, achieving energy efficiency in the mine water purification process.

[0077] Specifically, each filter tank 11 is a strip structure. This structural arrangement, with each filter tank 11 designed as a strip, optimizes the flow path of the mine water, ensuring that the water flows evenly through the filter medium and avoiding uneven filtration caused by localized excessively fast or slow water flow. The strip structure design also facilitates the arrangement and connection of the filter tanks 11, improving the compactness and reliability of the entire filtration system.

[0078] Specifically, the width of each filter tank 11 is greater than or equal to 40cm and less than or equal to 60cm. This ensures that the filter tank 11 has sufficient filtration area to effectively intercept and remove suspended solids in the mine water. This width design also takes into account the load-bearing capacity of the filter media and the water flow velocity, ensuring the high-efficiency filtration performance of the filter tank 11.

[0079] Specifically, the height of each filter tank 11 is greater than or equal to 180cm and less than or equal to 220cm. This ensures sufficient contact time and filtration path for the mine water, allowing suspended solids and impurities to be fully filtered and intercepted as the water flows through, thus enhancing the filtration effect. The taller filter tanks 11 can also hold more filter media, increasing the processing capacity of the filtration system and reducing the need for frequent replacement or cleaning of the filter media.

[0080] like Figure 2 As shown, the width of each filter tank 11 is D, where 40cm ≤ D ≤ 60cm. The height of each filter tank 11 is H, where 180cm ≤ H ≤ 220cm.

[0081] Specifically, the mine water purification process based on the open-pit coal mine discarded material can include the following steps: step one, embedding the "L-shaped" impermeable membrane 4 at the bottom 1 / 3 of the open-pit coal mine dump slope, and constructing three groups of filter tanks 11 with a width of 50 cm and a length of 200 cm, laying the impermeable membrane 4 around the filter tanks, connecting the three groups of filter tanks 11 with a DN350 stainless steel pipe, and filling them with gravel (particle size greater than 10 mm), coarse sand (particle size greater than 2 mm and less than or equal to 10 mm), and fine sand (particle size less than or equal to 2 mm) in turn; step two, constructing an underground reservoir (equivalent to the water storage structure 5) at the bottom of the dump 50 m away according to the terrain conditions, the main body of the reservoir being reconstructed sandstone of the dump, and the water pumping and injection wells being arranged according to the stratum floor elevation to ensure that the slope angle of the open-pit coal mine dump slope is less than 5% and the hydraulic retention time is greater than 30 days; step three, setting the water outlet at the bottom of the underground reservoir and providing a filter screen to prevent the sandstone medium in the reservoir from being scattered, and the water is pumped to the stripping device (equivalent to the second filter structure 2) by a submersible pump to remove bicarbonate in the water, and then flows out from the top of the tank through the water delivery pipeline to complete the daily watering and dust suppression and vegetation irrigation of the open-pit coal mine. The stripping device is composed of a stainless steel tank, the upper part of which is a hemisphere with a radius of 1 m (equivalent to the first shell 23 and the second shell 24), and the bottom part is a cylinder with a height of 4 m and a radius of 1 m (equivalent to the third shell 25). The air blower 26 blows compressed air into the gas collection chamber from the bottom of the device and delivers it to the top of the device through the gas delivery pipe (equivalent to the gas guide pipe 27) to contact the mine water sprayed downward in the opposite direction. The hemispherical bottom of the device is provided with a stainless steel partition (equivalent to the liquid separation plate), and 100 circular small holes with a radius of 2.5 cm are arranged in the partition. As the mine water flows downward, it is divided into small droplets. The compressed air from the gas delivery pipe fully contacts the small droplets. The bicarbonate in the water is broken under the action of compressed air, and the removal of bicarbonate is gradually completed as the reaction proceeds.

[0082] Specifically, when the raw water to be filtered has a turbidity of 550 NTU, a suspended matter concentration of 230 mg / L, a salinity of 865 mg / L, a COD (chemical oxygen demand) of 36 mg / L, and a HCO3- (bicarbonate) concentration of 313 mg / L, the liquid to be filtered enters the first filter tank 113 from the top, and flows through the second filter tank 114 and the third filter tank 115 to remove turbidity. The turbidity of the liquid discharged from the third filter tank 115 is reduced to 15 NTU, the suspended matter concentration is reduced to 8 mg / L, the salinity does not change significantly, the COD is reduced to 16 mg / L, and the HCO3- does not change significantly. The liquid flows into the underground reservoir from the bottom of the third filter tank 115, and migrates in the underground reservoir medium under the action of gravity potential. The turbidity of the outlet water is reduced to 6 NTU, the suspended matter concentration is reduced to 3 mg / L, the salinity does not change significantly, the COD is reduced to 4 mg / L, and the HCO3- concentration does not change significantly. The outlet water meets the relevant reuse standards.

[0083] Specifically, when the raw water turbidity of the liquid to be filtered is 150 NTU, the suspended matter concentration is 70 mg / L, the mineralization is 1130 mg / L, the COD is 22 mg / L, and the HCO3-concentration is 578 mg / L, the liquid to be filtered enters from the top of the first filter tank 113 and flows through the second filter tank 114 and the third filter tank 115 to remove turbidity, the liquid discharged from the third filter tank 115 has a turbidity of 8 NTU, a suspended matter concentration of 5 mg / L, a mineralization of 1065 mg / L, a COD of 15 mg / L, and no obvious change in HCO3-concentration. The liquid from the bottom of the third filter tank 115 flows into the underground reservoir and migrates in the underground reservoir medium under gravity potential, and the effluent has a turbidity of 3 NTU, a suspended matter concentration of 1 mg / L, a mineralization of 1233 mg / L, a COD of 3 mg / L, and no obvious change in HCO3-concentration. After the effluent is pumped into the stripping device, the effluent has a turbidity of 3 NTU, a suspended matter concentration of 1 mg / L, a mineralization of 766 mg / L, a COD of 3 mg / L, and a HCO3-concentration of 236 mg / L, and the effluent meets the relevant reuse standards.

[0084] Specifically, when the raw water turbidity of the liquid to be filtered is 450 NTU, the suspended matter concentration is 200 mg / L, the mineralization is 1034 mg / L, the COD is 30 mg / L, and the HCO3-concentration is 543 mg / L, the liquid to be filtered enters from the top of the first filter tank 113 and flows through the second filter tank 114 and the third filter tank 115 to remove turbidity, the liquid discharged from the third filter tank 115 has a turbidity of 10 NTU, a suspended matter concentration of 5 mg / L, a mineralization of 986 mg / L, a COD of 11 mg / L, and no obvious change in HCO3-concentration. The liquid from the bottom of the third filter tank 115 flows into the underground reservoir and migrates in the underground reservoir medium under gravity potential, and the effluent has a turbidity of 5 NTU, a suspended matter concentration of 2 mg / L, a mineralization of 1168 mg / L, a COD of 3 mg / L, and no obvious change in HCO3-concentration. After the effluent is pumped into the stripping device, the effluent has a turbidity of 5 NTU, a suspended matter concentration of 2 mg / L, a mineralization of 817 mg / L, a COD of 3 mg / L, and a HCO3-concentration of 220 mg / L, and the effluent meets the relevant reuse standards.

[0085] As Figure 3As shown, the second filter structure 2 is composed of a first shell 23 and a second shell 24, which are oppositely arranged and connected to form a filter chamber 21. The first shell 23 is designed in an arc shape, which helps to increase the contact area of air and liquid and improve the efficiency of removing bicarbonate. The second filter structure 2 also integrates a blower 26 and an air guide pipe 27. The air outlet of the blower 26 is connected to the air collection chamber to ensure stable air supply. One end of the air guide pipe 27 is located in the air collection chamber, and the other end is inserted into the second inlet 22 and equipped with a flow regulating member for precise control of the amount of air entering the filter chamber 21, ensuring the right contact time and intensity of air and liquid. This design optimizes the air introduction method, further enhances the filtering performance of the mine water purification device, and also reflects the flexibility of operation and the convenience of maintenance. The arrows in the air guide pipe 27 indicate the direction of air flow, the downward arrows extending from the first shell 23 indicate the direction of the liquid to be filtered, and the arc-shaped arrows represent the mutual contact of air and liquid to be filtered.

[0086] Figure 4 The turbidity change of the water storage structure 5 of the mine water purification device during the water storage process is shown in the form of a line graph. From November 21 to December 21, the turbidity of the liquid rapidly decreased from the initial 4.2 NTU. On November 26, the turbidity decreased to about 1.3 NTU, and then remained at a low level until December 21, when it increased slightly to about 1.5 NTU. This trend shows that the purification device can effectively and continuously reduce the turbidity of mine water to achieve the purpose of purifying water quality.

[0087] Figure 5 The TDS value change of the water storage structure 5 of the mine water purification device during the water storage process is shown in the form of a line graph, from about 280 mg / L on November 21 to about 350 mg / L on November 26, and then to about 170 mg / L on December 21. This series of changes reveals that the water storage structure 5 achieves partial removal of TDS while completing the storage of mine water, which can reduce the investment cost of membrane treatment process by 60%.

[0088] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: greatly reducing the construction cost of water treatment facilities and the energy consumption of filter material recovery during water treatment operation, reducing more than 50% of the power consumption compared to traditional processes, and the treatment capacity can be 5 times that of the coagulation-sedimentation process under the same investment conditions; fully utilizing the water storage characteristics of the reconstructed sandstone aquifer at the bottom of the dump, using the reconstructed sandstone aquifer of the dump to build an underground reservoir, which can effectively solve the seasonal contradiction of water use in open-pit coal mines in cold regions; reducing the concentration of bicarbonate in mine water, avoiding affecting the irrigation effect of mine water in the later stage, and avoiding phenomena such as large-scale vegetation withering and death.

[0089] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0090] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless specifically so stated. It is also to be understood that the dimensions shown in the drawings are not necessarily to scale, and that the various portions of the drawings are shown by way of example only and not limitation. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail in order to avoid obscuring the description of the present application. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not limiting. Other examples of the example embodiments can have different values. It is noted that like references and designations can indicate like items in the drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0091] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. The orientation words "inner, outer" refer to the inner and outer relative to the contour of the components themselves.

[0092] For purposes of the description hereinafter, spatial

[0093] In addition, it should be noted that the use of the terms "first", "second", etc., to describe a component having a defined property is only intended to distinguish between that component and another component having a different defined property, and is not otherwise intended to limit the scope of the present application unless otherwise indicated. Thus, use of the term "first" to describe a component is intended to connote that the component so qualified is not necessarily described first, but is intended to serve its qualification purpose in distinguishing that component from another component which is "second" in order of description.

[0094] The preferred embodiments of the present application have been described above with the intent to enable those skilled in the art to make and use it. Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, to the extent that the present application is limited by any terms imposed by law, the specific terms are intended to be interpreted in accordance with the broadest possible interpretation consistent with the requirements of the prior art.

Claims

1. A mine water purification apparatus, characterised in that, The application relates to a filter structure. The filter structure comprises a first filter structure (1) and a second filter structure (2). The first filter structure (1) comprises at least two filter tanks (11), and the outlet (111) of one of the two filter tanks (11) is connected with the liquid inlet (112) of the other filter tank (11); the liquid inlet (112) of one of the at least two filter tanks (11) is used for introducing a liquid to be filtered. The second filter structure (2) has a filter chamber (21) and a first inlet and a second inlet (22) connected with the filter chamber (21), the first inlet is located above the second inlet (22), the first inlet is connected with the outlet (111) of the other filter tank (11) of the at least two filter tanks (11), and the second inlet (22) is used for introducing air to remove bicarbonate in the liquid to be filtered through the contact between the air and the liquid.

2. The mine water purification apparatus of claim 1, wherein, Each filter tank (11) is filled with filter medium; along the height direction of the filter tank (11), the outlet (111) of one of the two filter tanks (11) is located above or flush with the liquid inlet (112) of the other filter tank (11), and the liquid inlet (112) of each filter tank (11) is located above the outlet (111) of each filter tank (11).

3. The mine water purification apparatus of claim 1, wherein, One of the two filter tanks (11) is filled with first filter medium, and the other filter tank (11) is filled with second filter medium, the particle diameter of the first filter medium is larger than that of the second filter medium. The at least two filter tanks (11) are arranged at intervals along a preset direction; the first filter structure (1) further comprises a connecting pipe (12), one end of the connecting pipe (12) is connected with the outlet (111) of one of the two filter tanks (11), and the other end of the connecting pipe (12) is connected with the liquid inlet (112) of the other filter tank (11); and / or 4. The mine water purification apparatus of claim 1, wherein, The at least two filter tanks (11) comprise a first filter tank (113), a second filter tank (114) and a third filter tank (115), the first outlet of the first filter tank (113) is connected with the second liquid inlet of the second filter tank (114), the second outlet of the second filter tank (114) is connected with the third liquid inlet of the third filter tank (115), and the third outlet of the third filter tank (115) is connected with the first inlet; the first liquid inlet of the first filter tank (113) is used for introducing the liquid to be filtered. The first filter structure (1) is arranged on a mine zone (3) having an inclined mounting surface, the at least two filter tanks (11) are inserted into the mine zone (3), and the at least two filter tanks (11) are arranged at intervals along the extension direction of the mounting surface of the mine zone (3); the first filter structure (1) further comprises An impervious membrane (4) is arranged in the mine area (3) and encloses an impervious space, and the first filtering structure (1) is located in the impervious space.

5. The mine water purification apparatus of claim 1, wherein, The second filtering structure (2) comprises oppositely arranged first and second shell members (23, 24) which are connected to each other and enclose the filtering chamber (21), the first inlet is arranged on the first shell member (23), and the second inlet (22) is arranged on the second shell member (24); The first shell member (23) is in an arc shape; and / or The second filtering structure (2) further comprises a liquid distribution plate which is arranged in the filtering chamber (21) and opposite to the first inlet, and a plurality of liquid distribution openings are arranged on the liquid distribution plate and spaced apart from each other.

6. The mine water purification apparatus according to any one of claims 1 to 5, characterized in that, The second filtering structure (2) comprises: A third shell member (25) which encloses a gas collecting chamber, and the gas collecting chamber is in communication with the second inlet (22); An air blower (26) whose air outlet is in communication with the gas collecting chamber.

7. The mine water purification apparatus of claim 6, wherein, The second filtering structure (2) further comprises: An air compressor whose input port is in communication with the air outlet of the air blower (26), and the output port of the air compressor is in communication with the gas collecting chamber; and / or A gas guide pipe (27) whose one end is located in the gas collecting chamber, and the other end is inserted into the second inlet (22), and a flow adjusting member for adjusting the air flow into the second inlet (22) is arranged on the gas guide pipe (27).

8. The mine water purification apparatus according to any one of claims 1 to 5, characterized in that, The mine water purification device further comprises: A water storage structure (5) which is arranged below the first filtering structure (1), and the water storage structure (5) encloses a water storage cavity, and the discharge port (111) of the other one of the at least two filtering grooves (11) and the first inlet are both in communication with the water storage cavity.

9. The mine water purification apparatus of claim 8, wherein, The water storage structure (5) comprises: A filter screen which is arranged on the water storage structure (5) and located at the communication position between the water storage cavity and the first inlet; and / or A water delivery pipe and a water pump, one end of the water delivery pipe is in communication with the water storage cavity, and the other end is in communication with the first inlet; the water pump is arranged on the water delivery pipe, and the opening degree of the outlet valve of the water pump is adjustably arranged.

10. The mine water purification apparatus according to any one of claims 1 to 5, characterized in that, Each of the filtering grooves (11) is in a strip shape; The width of each of the filtering grooves (11) is greater than or equal to 40 cm and less than or equal to 60 cm; and / or The height of each of the filtering grooves (11) is greater than or equal to 180 cm and less than or equal to 220 cm.

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