CN108862736B - Skid-mounted equipment for treating mine sewage and treatment method - Google Patents
Skid-mounted equipment for treating mine sewage and treatment method Download PDFInfo
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- CN108862736B CN108862736B CN201810813500.5A CN201810813500A CN108862736B CN 108862736 B CN108862736 B CN 108862736B CN 201810813500 A CN201810813500 A CN 201810813500A CN 108862736 B CN108862736 B CN 108862736B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses skid-mounted equipment for treating mine sewage, which comprises a first lift pump, a primary treatment unit, a second lift pump, a secondary treatment unit, a third lift pump, a tertiary treatment unit, a fourth lift pump and a fourth treatment unit which are sequentially communicated through pipelines, wherein the first lift pump to the fourth lift pump are connected with first water turbines; the method for treating the mine sewage realizes the power-free power of the whole driving process, meets the safety requirement of treating the sewage under the coal mine, and can be widely used.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, particularly relates to skid-mounted equipment for treating mine sewage, and further relates to a method for treating mine sewage by adopting the skid-mounted equipment.
Background
Coal accounts for more than 70% of energy structures in China, a large amount of wastewater is generated due to production requirements of dust prevention, equipment cooling and the like in the coal mining process, a large amount of dust and mineral substances are contained in water, if the wastewater is directly discharged without treatment, waste of water resources is caused, and sustainable development of coal production cannot be realized. The coal mine sewage quality characteristics are mainly shown as follows: (1) the main components of suspended matters in mine water are coal powder and rock powder, and the content of the coal powder is dozens to hundreds of milligrams per liter generally; (2) the granularity of suspended matters in the mine water is small, the density is low, and the sedimentation effect is poor; (3) the coal particles are easy to adsorb oily substances in water, so that the coal particles are negatively charged; mine water has relatively high hardness, most of the water quality is neutral or alkaline, and the water quality is bitter and astringent, and the water quality is acidic. Based on the requirement, the coal mine is required to determine the water quality treatment degree according to the requirement of the national environmental protection department, so that the effluent quality is guaranteed.
At present, mine water is treated by lifting sewage to the ground by a lifting pump and then treating the sewage. The mine water purification treatment mainly adopts a flocculation precipitation treatment process, the content of suspended matters in the treated water is controlled below 20mg/L, and the COD is lower than 50 mg/L. The treatment process flow comprises coagulation, precipitation, filtration, desalination, disinfection and the like, the structure mainly comprises a pre-precipitation adjusting tank, a reaction precipitation tank, a clarification tank, a filter tank and the like, the treated effluent is used as production water or is continuously treated as domestic water, the effluent can also be discharged outside, and the precipitate is discharged and filtered into coal cakes, and a typical process is shown in figure 1.
Because the elevation of the lift pump from the underground to the ground is large, generally more than 300m, the power consumption of the lift pump is large. Therefore, the coal mine water is treated and recycled on the excavation face by utilizing the skid-mounted treatment equipment, so that the energy consumption in the water treatment process can be greatly reduced, and the skid-mounted treatment equipment has the advantages of convenience and quickness in installation, convenience in removal, small occupied space and the like.
Most of the existing skid-mounted treatment equipment needs electricity as energy power, and the electricity is difficult to use in a large scale due to safety reasons on the digging face of a coal mine, so that the conventional electric power skid-mounted equipment is difficult to meet the underground safety requirement of the coal mine, and the development of the water treatment equipment without the electricity power is very important.
Disclosure of Invention
The invention aims to provide skid-mounted equipment for treating mine sewage, and solves the problem that the conventional skid-mounted equipment for treating the mine sewage cannot meet the underground safety requirement due to the fact that electricity is needed as energy power.
The invention also aims to provide a mine sewage treatment method.
The skid-mounted equipment for treating mine sewage drives a water turbine at different positions by utilizing the high pressure of mine bottom water, and the water turbine drives a lift pump to treat the mine water. Mine sewage passes through the pipeline and promotes the primary treatment unit that feeds through in proper order through first elevator pump, the second elevator pump, the secondary treatment unit, the third elevator pump, tertiary treatment unit, the fourth elevator pump, level four treatment unit, first elevator pump to fourth elevator pump, first filter all is connected with first hydraulic turbine, the delivery port of all first hydraulic turbines all communicates with first filter, level four treatment unit all is connected with the fifth elevator pump with the delivery port of first filter, and the fifth elevator pump is connected with the second hydraulic turbine, every first hydraulic turbine all is connected with the water inlet of second hydraulic turbine and has a water pipeling.
The present invention is also characterized in that,
the primary treatment unit comprises a first dosing device filled with a treatment agent A, a first pipeline mixer, a second dosing device filled with a treatment agent B, a second pipeline mixer and a primary hydrocyclone which are sequentially communicated through pipelines; the first dosing device and the second dosing device are both water jet devices.
The secondary treatment unit comprises a secondary hydrocyclone.
The third-stage treatment unit comprises a third-stage hydrocyclone and a water storage tank which are sequentially communicated through a pipeline.
The four-stage treatment unit comprises a second filter and a water storage tank which are sequentially communicated through a pipeline, and water outlets of the water storage tank and the first filter are communicated with a fifth lift pump.
The first-stage hydrocyclone, the second-stage hydrocyclone and the third-stage hydrocyclone are also connected with a sewage recovery tank.
The invention provides another technical scheme that the method for treating the mine sewage adopts skid-mounted equipment for treating the mine sewage, and is implemented according to the following steps:
step 2, performing four-stage treatment on the mine sewage respectively through a first lifting pump, a second lifting pump, a third lifting pump and a fourth lifting pump in sequence through a first-stage treatment unit, a second-stage treatment unit, a third-stage treatment unit and a fourth-stage treatment unit to obtain mine treatment water;
and 3, collecting effluent in the first to fifth water turbine into a collecting pipe, filtering the effluent by a first filter, mixing the effluent with treated mine water, and pumping the mixture to a mining face by a fifth lifting pump.
The present invention is also characterized in that,
in the step 1, the rotating speed of the first water turbine and the second water turbine is 1400-2100 rpm, and the flow rates of the first lift pump, the second lift pump, the third lift pump, the fourth lift pump and the fifth lift pump are 1.0m3/h～50m3The delivery lift is 10m to 40 m.
The primary treatment unit comprises a first dosing device, a first pipeline mixer, a second dosing device, a second pipeline mixer and a primary hydrocyclone, wherein the first dosing device is filled with a treatment agent A, the first pipeline mixer is sequentially communicated with the second dosing device through a pipeline, mine sewage sequentially enters the first dosing device and the first pipeline mixer which are filled with the treatment agent A through a first lifting pump, and effluent of the first pipeline mixer enters the second pipeline mixer through the second dosing device which is filled with the treatment agent B and is mixed with the treatment agent B in the second pipeline mixer.
The treating agent A is an inorganic flocculant with the addition of 20 mg/L-60 mg/L; the treating agent B is organic flocculant in the amount of 0.1-1.5 mg/L.
The invention has the beneficial effects that:
the skid-mounted equipment for treating mine sewage has the advantages that: the skid-mounted equipment has no power supply, and the treated water is directly used in the production process of the mining surface; the structure is regular, and intensive arrangement is adopted, so that the field space is saved, and the field construction and installation are facilitated; the device belongs to a mobile device, particularly meets the requirements of the oil and gas industry, is convenient to remove, and can adjust the position of equipment according to the change of the field condition, thereby reducing the construction fund of the equipment; and (IV) most of work is finished in a factory, the process equipment, the piping and the electrical instrument are assembled on a skid, and the skid-mounted equipment is only required to be mounted on a foundation, connected with inlet and outlet pipelines in the skid-mounted equipment and connected with the wiring of some electrical instruments during field mounting, so that the field workload and the mounting time are greatly reduced, and the construction cost is saved.
The mine sewage treatment method provided by the invention has the advantages that the pressure of the coal mine bottom water in the drainage hole is conveyed to the water turbine to drive each lifting pump, each lifting pump conveys the mine sewage to the four-stage treatment unit for treatment in sequence, and finally the mine sewage is conveyed to the mining face for recycling, so that the power-free power of the whole driving process is realized, the safety requirement of treating the sewage under the coal mine is met, and the mine sewage treatment method can be widely used.
Drawings
FIG. 1 is a flow chart of the current process for treating mine sewage;
FIG. 2 is a flow chart of the treatment process of mine sewage.
In the figure, 1, a first lift pump, 2, a primary treatment unit, 3, a second lift pump, 4, a secondary treatment unit, 5, a third lift pump, 6, a tertiary treatment unit, 7, a fourth lift pump, 8, a quaternary treatment unit, 9, a first water turbine, 10, a first filter, 11, a fifth lift pump, 12, a second water turbine, 13, a bottom water pipeline, 14, a first dosing device, 15, a first pipeline mixer, 16, a second dosing device, 17, a second pipeline mixer, 18, a primary hydrocyclone, 19, a secondary hydrocyclone, 20, a tertiary hydrocyclone, 21, a water storage tank, 22, a second filter, 23, a water storage tank and 24, a sewage recovery tank.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses skid-mounted equipment for treating mine sewage, aiming at the safety requirements of equipment for producing sewage in the coal mining process of a coal mining face and treating the sewage in the coal mining face, the skid-mounted equipment is the sewage treatment skid-mounted equipment without power supply power, the treated water is directly used in the production process of the coal mining face, the specific structure is shown in figure 1, the skid-mounted equipment comprises a first lifting pump 1, a first-stage treatment unit 2, a second lifting pump 3, a second-stage treatment unit 4, a third lifting pump 5, a third-stage treatment unit 6, a fourth lifting pump 7 and a fourth-stage treatment unit 8 which are sequentially communicated through pipelines, the first lifting pump 1 to the fourth lifting pump 7 are all connected with a first water turbine 9, and the lifting pumps are respectively driven by the water pressure in the four water turbines 9; still include first filter 10, the delivery port of all first hydraulic turbines 9 all communicates with first filter 10, and level four processing unit 8 all is connected with fifth elevator pump 11 with the delivery port of first filter 10, and fifth elevator pump 11 is connected with second hydraulic turbine 12, and every first hydraulic turbine 9 all is connected with end water pipeline 13 with the water inlet of second hydraulic turbine 12.
The skid-mounted equipment for treating mine sewage is characterized in that power in the sewage treatment process is derived from coal mine bottom water in a drainage hole drilled for preventing water penetration in the coal mine production process, the pressure of the coal mine bottom water is 1.5-3.0 MPa, the coal mine bottom water is collected into a bottom water pipeline 13, high-pressure bottom water in the bottom water pipeline 13 is conveyed to each first water turbine 9 and each second water turbine 12 in the water treatment process, the first lifting pump 1, the second lifting pump 3, the third lifting pump 5, the fourth lifting pump 7 and the fifth lifting pump 11 are respectively driven by the water pressure in each water turbine, the rotating speed of the first water turbine 9 and the rotating speed of the second water turbine 12 are 1400-2100-rpm, and the first lifting pump 1, the third lifting pump 5 and the fifth lifting pump 11 are driven by the water pressure in each water turbineThe flow rates of the second lift pump 3, the third lift pump 5, the fourth lift pump 7 and the fifth lift pump 11 are 1.0m3/h～50m3The delivery lift is 10-40 m; the effect of conveying sewage is achieved by reasonably utilizing the pressure of the coal mine bottom water, the operation of the whole skid-mounted equipment without power supply power is realized, and the safety requirement of underground sewage treatment of the coal mine is further met.
Wherein, the primary treatment unit 2 comprises a first dosing device 14 filled with a treatment agent A, a first pipeline mixer 15, a second dosing device 16 filled with a treatment agent B, a second pipeline mixer 17 and a primary hydrocyclone 18 which are sequentially communicated through pipelines; the first dosing device 14 and the second dosing device 16 are both water jet devices, and treatment agents enter the mine sewage through the negative pressure effect of the water jet devices, so that the treatment agents A and B are fully utilized, and the treatment effect of the mine sewage is improved; in addition, the mixing of the sewage and the treatment agent A or the treatment agent B is carried out in the first pipeline mixer 15 or the second pipeline mixer 17, so that the occupied area of mixing equipment is reduced; the mine sewage enters a primary hydrocyclone 18 for cyclone separation after being subjected to flocculation and sedimentation of treatment agents A and B.
The secondary treatment unit 4 comprises a secondary hydrocyclone 19, and the effluent of the primary hydrocyclone 18 enters the secondary hydrocyclone 19 through the second lift pump 3 to continue the cyclone separation.
The third-stage treatment unit 6 comprises a third-stage hydrocyclone 20 and a water storage tank 21 which are sequentially communicated through a pipeline, effluent treated by the second-stage hydrocyclone 19 enters the third-stage hydrocyclone 20 through the third lifting pump 5 for cyclone separation, then enters the water storage tank 21 for precipitation, and the effluent continues to enter the second filter 22 and the water storage tank 23 through the fourth lifting pump 7, so that the treatment of the mine sewage is completed.
The surplus coal mine bottom water in each first water turbine 9 enters a first filter 10 through a pipeline, and is conveyed to a mining surface for reutilization through a fifth lifting pump 11 together with the treated mine sewage after filtration, so that the reutilization of the surplus coal mine bottom water in each first water turbine 9 is ensured, and the resource waste is reduced.
The effluent of the first-stage hydrocyclone 18, the second-stage hydrocyclone 19 and the third-stage hydrocyclone 20 is also conveyed into a sewage recovery tank 24, the quality of the treated water in the sewage recovery tank 24 is monitored, if the effluent meets the standard, subsequent treatment is not needed, and if the effluent does not meet the standard, the sewage recovery tank 24 directly enters the first-stage treatment unit 2 through the first lifting pump 1 for retreatment.
The invention relates to a treatment method of mine sewage, which adopts the skid-mounted equipment for treating the mine sewage and is implemented according to the following steps:
step 2, performing four-stage treatment on the mine sewage through a first lifting pump 1, a second lifting pump 3, a third lifting pump 5 and a fourth lifting pump 7 in sequence through a first-stage treatment unit 2, a second-stage treatment unit 4, a third-stage treatment unit 6 and a fourth-stage treatment unit 8 to obtain mine treatment water;
and 3, filtering the effluent in the first water turbine 9 by using a first filter 10, mixing the effluent with mine treatment water, and conveying the mixture to a mining surface by using a fifth lifting pump 11 for recycling.
In step 1, the rotating speeds of the first water turbine 9 and the second water turbine 12 are 1400 rpm to 2100 rpm, and the flow rates of the first lift pump 1, the second lift pump 3, the third lift pump 5, the fourth lift pump 7 and the fifth lift pump 11 are 1.0m3/h～50m3The delivery lift is 10m to 40 m.
The mine sewage sequentially enters a first chemical adding device 14 and a first pipeline mixer 15 which are filled with a treatment chemical A through a first lifting pump 1, the effluent of the first pipeline mixer 15 enters a second pipeline mixer 17 through a second chemical adding device 16 which is filled with a treatment chemical B, and is mixed with the treatment chemical B in the second pipeline mixer 17, wherein the treatment chemical A is an inorganic flocculant mainly comprising polyaluminium, polyferric, polyaluminium silicate, polyaluminium ferric silicate and the like, and the addition amount is 20-60 mg/L, namely 20-60 mg of the treatment chemical A is added into one liter of the sewage; the treatment agent B is an organic flocculant and mainly comprises cationic polyacrylamide (the cationic degree is 23 percent, and the molecular weight range is 800 plus 1200 ten thousand daltons), and poly dimethyl diallyl ammonium chloride (the molecular weight is 30000 plus 100000 ten thousand daltons), wherein the addition amount is 0.1-1.5 mg/L, namely 0.1-1.5 mg of the treatment agent B is added into one liter of sewage.
Example 1
Drilling a drainage hole in a coal seam, collecting and conveying coal seam bottom water with the pressure of more than 1.5-3.0 Mpa to a first water turbine 9 and a second water turbine 12 through a bottom water pipeline 13, and respectively driving a first lifting pump 1, a second lifting pump 3, a third lifting pump 5, a fourth lifting pump 7 and a fifth lifting pump 11; sequentially feeding mine sewage with turbidity of 80-300 (NTU) and COD of 60-90 mg/L into a first chemical adding device 14 and a first pipeline mixer 15 which are filled with a treatment chemical A through a first lifting pump 1, feeding effluent of the first pipeline mixer 15 into a second pipeline mixer 17 through a second chemical adding device 16 which is filled with a treatment chemical B, mixing the effluent with the treatment chemical B in the second pipeline mixer 17, feeding the mixture into a primary hydrocyclone 18 for centrifugal sedimentation, feeding effluent of the primary hydrocyclone 18 into a secondary hydrocyclone 19 through a second lifting pump 3 for continuous centrifugal treatment, feeding the effluent treated by the secondary hydrocyclone 19 into a tertiary hydrocyclone 20 for centrifugal treatment through a third lifting pump 5, then feeding the effluent into a water storage tank 21 for sedimentation, and continuously lifting the effluent to a second filter 22 through a fourth lifting pump 7, the water from the second filter 22 enters the water storage tank 23, and the water from each first water turbine 9 is filtered by the first filter 10, mixed with the water in the water storage tank 23, and then conveyed to the mining surface by the fifth lift pump 11 driven by the second water turbine 12 for reuse.
In examples 2 to 6, mine sewage with different turbidity and COD is treated by the skid-mounted equipment for treating mine sewage, the treatment process is shown in example 1, and the treatment results are shown in Table 1.
TABLE 1 results of treatment of mine wastewater with different turbidity and COD
Note: standard of reuse water: COD was below 30mg/L and turbidity was below 5.0 NTU.
As can be seen from Table 1, different mine sewages are treated by the skid-mounted device of the invention, and after passing through each treatment unit, the turbidity and COD of the effluent of the second filter 22 can be effectively reduced to meet the standard of reuse water, and the treated water can be recycled.
Claims (2)
1. The skid-mounted equipment for treating mine sewage is characterized by comprising a first lift pump (1), a first-stage treatment unit (2), a second lift pump (3), a second-stage treatment unit (4), a third lift pump (5), a third-stage treatment unit (6), a fourth lift pump (7) and a fourth-stage treatment unit (8) which are sequentially communicated through pipelines, wherein the first lift pump (1) to the fourth lift pump (7) are respectively connected with a first water turbine (9) and a first filter (10), water outlets of all the first water turbines (9) are respectively communicated with the first filter (10), the fourth-stage treatment unit (8) and the water outlet of the first filter (10) are respectively connected with a fifth lift pump (11), the filtered and treated mine sewage are conveyed to a mining surface through the fifth lift pump (11) for reutilization, and the fifth lift pump (11) is connected with a second water turbine (12), the water inlets of the first water turbine (9) and the second water turbine (12) are connected with a bottom water pipeline (13);
the primary treatment unit (2) comprises a first dosing device (14) filled with a treatment agent A, a first pipeline mixer (15), a second dosing device (16) filled with a treatment agent B, a second pipeline mixer (17) and a primary hydrocyclone (18) which are sequentially communicated through pipelines; the first dosing device (14) and the second dosing device (16) are both water jet devices;
the secondary treatment unit (4) comprises a secondary hydrocyclone (19);
the three-stage treatment unit (6) comprises a three-stage hydrocyclone (20) and a water storage tank (21) which are sequentially communicated through a pipeline;
the four-stage treatment unit (8) comprises a second filter (22) and a water storage tank (23) which are sequentially communicated through a pipeline, and water outlets of the water storage tank (23) and the first filter (10) are communicated with a fifth lift pump (11);
the primary hydrocyclone (18), the secondary hydrocyclone (19) and the tertiary hydrocyclone (20) are also connected with a sewage recovery tank (24).
2. The method for treating the mine sewage is characterized in that the skid-mounted equipment for treating the mine sewage is adopted according to claim 1, and the method is implemented according to the following steps:
step 1, drilling a drainage hole in a coal seam, collecting and conveying coal seam bottom water with the pressure of 1.5-2 Mpa to a first water turbine (9) and a second water turbine (12) through a bottom water pipeline (13), and respectively driving a first lifting pump (1), a second lifting pump (3), a third lifting pump (5), a fourth lifting pump (7) and a fifth lifting pump (11);
wherein the rotating speeds of the first water turbine (9) and the second water turbine (12) are 1400-2100 rpm, and the flow rates of the first lift pump (1), the second lift pump (3), the third lift pump (5), the fourth lift pump (7) and the fifth lift pump (11) are 1.0m3/h～50m3The delivery lift is 10-40 m;
step 2, performing four-stage treatment on the mine sewage through a first lifting pump (1), a second lifting pump (3), a third lifting pump (5) and a fourth lifting pump (7) in sequence through a first-stage treatment unit (2), a second-stage treatment unit (4), a third-stage treatment unit (6) and a fourth-stage treatment unit (8) to obtain mine treated water;
the primary treatment unit (2) comprises a first dosing device (14) filled with a treatment agent A, a first pipeline mixer (15), a second dosing device (16) filled with a treatment agent B, a second pipeline mixer (17) and a primary hydrocyclone (18) which are sequentially communicated through pipelines, mine sewage sequentially enters the first dosing device (14) filled with the treatment agent A and the first pipeline mixer (15) through a first lifting pump (1), effluent of the first pipeline mixer (15) enters the second pipeline mixer (17) through the second dosing device (16) filled with the treatment agent B and is mixed with the treatment agent B in the second pipeline mixer (17);
the treating agent A is an inorganic flocculant, and the addition amount of the treating agent A is 20 mg/L-60 mg/L; the treating agent B is an organic flocculant, and the addition amount of the treating agent B is 0.1 mg/L-1.5 mg/L;
and 3, filtering the effluent in the first water turbine (9) by using a first filter (10), mixing the effluent with mine treatment water, and conveying the mixture to a mining face by using a fifth lifting pump (11).
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