Mine underground water treatment system

Abstract

The invention relates to a mine underground water treatment system, and belongs to the technical field of coal mine production. The system comprises a raw water area, a reclaimed water area, a hardness removal area, a softening area and a water storage area which are sequentially connected through a pipeline with a water pressure pump and a valve, the reclaimed water area is connected with the softening area through the pipeline with the water pressure pump and the valve, an ion exchange resin tank is arranged in the hardness removal area, and a nanofiltration membrane assembly is arranged in the softening area. An ion exchange resin regeneration device is arranged on the hardness removal area, a second dosing device is arranged on the softening area, the water storage area is respectively connected with the ion exchange resin regeneration device and the second dosing device through pipelines with water pressure pumps and valves, the water pressure pumps and the valves are connected with a control panel, and the control panel controls the on-off and on-off of the water pressure pumps and the valves. The system has the advantages of short processing flow, high efficiency, no use of electric power and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine production, and particularly relates to the treatment of mine water, in particular to an underground mine water treatment system. Background Art

[0002] A large amount of mine water is produced during the mining process of coal mines. The mine water contains a large amount of suspended matter, which makes the mine water turbid. There are also many oily components on its surface, and the interior contains a large number of various acidic ions and ferrous ions. Even processes with low water quality requirements, such as water used for coal seam water injection, cannot directly use mine water, let alone processes with high water quality requirements. Therefore, it is urgent to treat the mine water so that it can be used for production.

[0003] For mine water, if it is directly discharged to the ground without treatment, it will not only cause great pollution to the environment, but also waste precious water resources. Therefore, there is an urgent need for a water treatment device to treat mine water.

[0004] In view of the above situation, many devices for mine water treatment have been designed in the prior art. However, these existing treatment devices often have many problems, such as complex structure, numerous processes, high operating costs, low treatment efficiency, poor purification effect, etc. Moreover, it is necessary to strictly abide by the electricity use regulations in the mine to avoid major accidents such as gas explosions caused by electric sparks, and the existing treatment devices are also insufficient in this regard, and there are certain safety hazards. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and provide a newly designed underground mine water treatment system. The system is an integrated and efficient water treatment system for different mine water qualities and underground water demand differences under complex working conditions in coal mines, and has the advantages of short treatment process, high efficiency, and no use of electricity.

[0006] The present invention is achieved through the following technical solutions: A mine underground water treatment system comprises a raw water area, a middle water area, a hardness removal area, a softening area, a water storage area and a control panel.

[0007] The raw water area is connected to the coal mine water supply system through a first pipeline, and a first water pressure pump and a first valve are arranged on the first pipeline.

[0008] The intermediate water area is connected to the raw water area through a second pipeline, and a second water pressure pump and a second valve are arranged on the second pipeline; an intermediate water area outlet is arranged at the bottom of the intermediate water area for purposes such as equipment cooling.

[0009] The hardness removal area is connected to the medium water area through a third pipeline, and a third hydraulic pump and a third valve are arranged on the third pipeline; an ion exchange resin tank is arranged inside the hardness removal area, and an anion and cation exchange resin is arranged inside the ion exchange resin tank to remove Ca in the mine water. 2+ Mg 2+ .

[0010] The softening zone is connected to the de-hardening zone through a fourth pipeline, on which a fourth hydraulic pump and a fourth valve are arranged; the softening zone is connected to the intermediate water zone through a sixth pipeline, on which a sixth hydraulic pump and a sixth valve are arranged; a nanofiltration membrane assembly is arranged inside the softening zone.

[0011] The water storage area is connected with the softening area through the fifth pipeline, and the fifth pipeline is provided with a fifth water pressure pump and a fifth valve; the outside of the water storage area is provided with a water storage area outlet for underground spray dust reduction.

[0012] Each hydraulic pump and each valve is connected to a control panel, and the control panel controls the shutdown and startup thereof.

[0013] Furthermore, a first dosing device, a first water quality detector and a first water level meter are provided on the top of the raw water area; PAC (polyaluminum chloride) and PAM (polyacrylamide) are respectively installed on both sides of the first dosing device, and a first switch is provided at the bottom of the first dosing device to control the dosage; the first water quality detector is used to detect the hardness, turbidity and salt content of mine water; the first water level meter is used to detect the water level inside the raw water area; the first water quality detector, the first water level meter and the first switch are all connected to the control panel.

[0014] Furthermore, a second water level gauge and a second water quality detector are provided on the top of the middle water area, and both the second water level gauge and the second water quality detector are connected to the control panel; the second water level gauge is used to detect the water level inside the middle water area; the second water quality detector is used to detect the components of mine water.

[0015] Furthermore, an ion exchange resin regeneration device is provided on the top of the hard removal area, and the ion exchange resin regeneration device is connected to the ion exchange resin tank; an ion exchange regeneration liquid is provided in the ion exchange resin regeneration device, and the ion exchange regeneration liquid is composed of a 1% low-temperature NaCl solution; a regeneration device switch is provided at the bottom of the ion exchange resin regeneration device to control the outflow of the ion exchange regeneration liquid, and the regeneration device switch is connected to the control panel.

[0016] Furthermore, 4-6 groups of nanofiltration membrane assemblies arranged in parallel are provided inside the softening zone. The nanofiltration membrane assembly is composed of a nanofiltration membrane with a nano-scale pore separation layer, with a pore size of 0.2-1.5nm, a retention molecular weight of 200-1500Da, and a pressure resistance of 1-5MPa. It is used to remove salt from mine water and further soften the mine water; a second dosing device is provided on the softening zone, and a surfactant is provided in the second dosing device to clean the nanofiltration membrane with a nano-scale pore separation layer; a second switch is provided at the bottom of the second dosing device to control the outflow of the surfactant, and the second switch is connected to the control panel.

[0017] Furthermore, a third water level gauge is provided on the top of the water storage area to detect the water level inside the water storage area, and the third water level gauge is connected to the control panel; the water storage area is connected to the ion exchange resin regeneration device and the second dosing device respectively through the seventh pipeline, and the seventh pipeline is provided with a seventh water pressure pump and a seventh valve; the water storage area is connected to the ion exchange resin regeneration device, and the ion exchange regeneration liquid in the ion exchange resin regeneration device can be diluted, and the ion exchange regeneration liquid regenerates the anion and cation exchange resins in the ion exchange resin tank and then enters the softening area for softening; the water storage area is connected to the second dosing device, and is used to first use the softened mine water in the water storage area for flushing when the pipeline flow is lower than the preset value, and then turn on the second switch to dilute the surfactant cleaning agent and clean the nanofiltration membrane of the nano-pore separation layer.

[0018] Furthermore, each pipeline is provided with a pressure sensor and a flow sensor, and the pressure sensor and the flow sensor are both connected to the control panel.

[0019] Furthermore, the control panel controls the activation and shutdown of the water pressure pump and valve in any pipeline in the system, as well as the display of data from the pressure sensor, flow sensor, water level gauge, and water quality detector in the system; when the pressure sensor or flow sensor sounds an alarm, the control panel will shut down the system; when the first water level gauge, the second water level gauge, and the third water level gauge exceed the preset water level, the control panel will shut down the system, or it can also shut down the water pressure pump of the first part until its water level drops to the preset water level; when the first water quality detector detects that the pH and hardness of the mine water exceed the set value (when the pH is detected to be too low or too high, and the hardness is relatively high), the control panel will shut down the system; when the second water quality detector detects that the hardness of the mine water exceeds the set value (when the hardness is detected to be relatively low), the control panel will activate the sixth pipeline to connect the intermediate water area and the softening area to speed up the mine water treatment speed; when the flow rate is lower than the set value, the control panel will activate the ion exchange resin regeneration device and the second dosing device to ensure the working efficiency of the system.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1) All pumps used in this system are hydraulic pumps, which are driven by water pressure instead of electricity, thereby reducing the generation of electric sparks and the occurrence of gas explosion accidents, thus improving the safety of underground operations.

[0021] 2) In this system, the middle water zone is connected to the hardening zone and the top is also connected to the front pipeline of the softening zone. When the hardness of the mine water in the middle water zone is relatively low, it will be directly connected to the softening zone. The pipeline is equipped with a water pressure pump and valve, which can greatly speed up the mine water treatment speed. There is also a middle water zone outlet at the bottom, which can be directly used for equipment cooling when the hardness is relatively low.

[0022] 3) There is a pipeline outside the water storage area connected to the ion exchange resin regeneration device. When the flow meter in the system is lower than the preset value, the mine water stored in the water storage area, that is, the softened mine water, is mixed with the ion exchange regeneration liquid in the ion exchange resin regeneration device, thereby regenerating the anion and cation exchange resins in the hardness removal area.

[0023] 4) There is a pipeline outside the water storage area connected to the second dosing device. When the flow meter in the system is lower than the preset value, the mine water stored in the water storage area, that is, the softened mine water, first flushes the nanofiltration membrane of the nano-pore separation layer, and then opens the second dosing device to mix the surfactant cleaning agent with the softened mine water to achieve the dilution effect.

[0024] 5) The water used for ion exchange regeneration and nanofiltration membrane flushing in this system comes from the water storage area, achieving the effect of mine water reuse.

[0025] 6) The control panel can shut down the system according to the specific situation in the system. For example, when the pressure sensor or flow sensor exceeds the preset alarm, the hardness of the mine water entering the raw water area is too high or the pH value is too high or too low, the water level in the system exceeds the preset value, etc. When the ion exchange resin is regenerated, the control panel will also shut down the water pressure pump and valve in front of the hardness removal area to ensure the smooth regeneration of ions. It has the advantages of intelligent control and can greatly reduce the use of manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the structure and connection of the system of the present invention.

[0028] Figure 2 This is a schematic diagram of normal treatment of mine water in the system of the present invention.

[0029] Figure 3 Schematic diagram of rapid treatment of mine water in the system of the present invention.

[0030] Figure 4 The figure is a simplified schematic diagram of mine water reuse and system recovery in the system of the present invention.

[0031] In the figure: 01, first valve; 02, first water pressure pump; 1, raw water area; 11, first dosing device; 12, first switch; 13, first water quality detector; 14, first water level gauge; 15, second water pressure pump; 16, second valve; 2, intermediate water area; 21, second water level gauge; 22, second water quality detector; 23, third valve; 24, third water pressure pump; 25. Middle water zone outlet; 3. Hardness removal zone; 31. Ion exchange resin regeneration device; 32. Regeneration device switch; 33. Fourth valve; 34. Fourth water pressure pump; 35. Pressure sensor; 36. Flow sensor; 37. Ion exchange resin tank; 4. Softening zone; 41. Nanofiltration membrane assembly; 42. Second dosing device; 43. Second switch; 44. Fifth valve; 45. Fifth water pressure pump; 5. Water storage zone; 51. Third water level gauge; 52. Water storage zone outlet; 61. Sixth valve; 62. Sixth water pressure pump; 63. Seventh water pressure pump; 64. Seventh valve. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "top", "bottom", "inner", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] This embodiment provides a mine underground water treatment system, such as Figure 1 As shown, it includes a raw water area 1, a middle water area 2, a hardness removal area 3, a softening area 4, a water storage area 5 and a control panel.

[0037] The raw water area 1 is connected to the coal mine water supply system through the first pipeline, and the first pipeline is provided with the first hydraulic pump 02 and the first valve 01. The top of the raw water area 1 is provided with the first dosing device 11, the first water quality detector 12 and the first water level gauge 13; PAC polyaluminium chloride and PAM polyacrylamide are respectively installed on both sides of the first dosing device 11, and the bottom of the first dosing device 11 is provided with a first switch 12 for controlling the dosing amount; the first water quality detector 12 is used to detect the hardness, turbidity and salt content of the mine water; the first water level gauge 13 is used to detect the water level inside the raw water area 1; the first hydraulic pump 02, the first valve 01, the first water quality detector 12, the first water level gauge 13 and the first switch 12 are all connected to the control panel.

[0038] The intermediate water area 2 is connected to the raw water area 1 through a second pipeline, and a second hydraulic pump 15 and a second valve 16 are provided on the second pipeline; an intermediate water area outlet 25 is provided at the bottom of the intermediate water area 2 for equipment cooling. A second water level gauge 21 and a second water quality detector 22 are provided at the top of the intermediate water area 2, and the second water level gauge 21 is used to detect the water level inside the intermediate water area 2, and the second water quality detector 22 is used to detect the components of mine water; the second hydraulic pump 15, the second valve 16, the second water level gauge 21 and the second water quality detector 22 are all connected to the control panel.

[0039] The hardness removal area 3 is connected to the medium water area 2 through a third pipeline, and a third hydraulic pump 24 and a third valve 23 are arranged on the third pipeline; an ion exchange resin tank 37 is arranged inside the hardness removal area 3, and an anion and cation exchange resin is arranged inside the ion exchange resin tank 37 to remove Ca in the mine water. 2+ Mg 2+An ion exchange resin regeneration device 31 is provided on the top of the hard removal area 3, and the ion exchange resin regeneration device 31 is connected to the ion exchange resin tank 37; an ion exchange regeneration liquid is provided in the ion exchange resin regeneration device 31, and the ion exchange regeneration liquid is composed of a 1% low-temperature NaCl solution; a regeneration device switch 32 is provided at the bottom of the ion exchange resin regeneration device 31 to control the outflow of the ion exchange regeneration liquid; the third hydraulic pump 24, the third valve 23, and the regeneration device switch 32 are all connected to the control panel.

[0040] The softening zone 4 is connected to the de-hardening zone 3 through a fourth pipeline, and a fourth hydraulic pump 34 and a fourth valve 33 are provided on the fourth pipeline; the softening zone 4 is connected to the intermediate water zone 2 through a sixth pipeline, and a sixth hydraulic pump 62 and a sixth valve 61 are provided on the sixth pipeline; 4-6 groups of nanofiltration membrane assemblies 41 arranged in parallel are provided inside the softening zone 4, and the nanofiltration membrane assembly 41 is composed of a nano-scale pore size separation layer nanofiltration membrane, with a pore size of 0.2-1.5nm, a molecular weight cutoff of 200-1500Da, and a pressure resistance of 100-2000Da. The pressure is 1 to 5 MPa, which is used to remove salt from mine water and further soften the mine water; a second dosing device 42 is provided on the softening zone 4, and a surfactant cleaning agent is provided in the second dosing device 42 to clean the nanofiltration membrane of the nano-pore separation layer; a second switch 43 is provided at the bottom of the second dosing device 42 to control the outflow of the surfactant cleaning agent; the fourth water pressure pump 34, the fourth valve 33, the sixth water pressure pump 62, the sixth valve 61, and the second switch 43 are all connected to the control panel.

[0041] The water storage area 5 is connected to the softening area 4 through the fifth pipeline, and the fifth water pressure pump 45 and the fifth valve 44 are arranged on the fifth pipeline; the water storage area 5 is provided with a water storage area outlet 52 outside for underground spray dust reduction. The top of the water storage area 5 is provided with a third water level gauge 51 for detecting the water level inside the water storage area 5; the water storage area 5 is connected to the ion exchange resin regeneration device 31 and the second dosing device 42 respectively through the seventh pipeline, and the seventh water pressure pump 63 and the seventh valve 64 are arranged on the seventh pipeline. The fifth water pressure pump 45, the fifth valve 44, the third water level gauge 51, the seventh water pressure pump 63 and the seventh valve 64 are all connected to the control panel.

[0042] Each of the above pipelines is provided with a pressure sensor 35 and a flow sensor 36, and the pressure sensor 35 and the flow sensor 36 are connected to the control panel; when the pressure sensor 35 or the flow sensor 36 sends out an alarm, the control panel will shut down the system.

[0043] The working principle of the above-mentioned system of the present invention is further described in detail below: For the mine underground water treatment system of the present invention, under normal use conditions, that is, when the second water quality detector 22 in the intermediate water zone 2 detects that the mine water condition is poor or the mine water does not need to be treated quickly, the sixth pipeline between the intermediate water zone 2 and the softening zone 4 will not be activated, and the treatment direction of the mine water is Figure 2 As shown, the white color means that mine water can pass through, and the black color means that mine water cannot pass through.

[0044] The normal treatment process is that when mine water enters, the first switch 12 of the first dosing device 11 of the raw water area 1 will be opened, and the mine water in the raw water area 1 will be treated to remove suspended matter, and then go to the intermediate water area 2 through the second pipeline; when the sixth pipeline between the intermediate water area 2 and the softening area 4 is not activated, the intermediate water area 2 plays the role of buffering and temporarily storing the mine water, and then the mine water enters the hardness removal area 3 through the third pipeline; the mine water enters the ion exchange resin tank 37 and the hardness ions therein are removed by the anion and cation exchange resins in the tank, and then enters the softening area 4 through the fourth pipeline; the softening area 4 has a plurality of parallel nanofiltration membrane components 41, and the salt in the mine water is removed here, and after the treatment is completed, it enters the water storage area 5 through the fifth pipeline; the water storage area 5 has a water storage area outlet 52 for softened mine water to be used underground.

[0045] For the mine underground water treatment system of the present invention, under the condition that the mine water needs to be quickly treated, that is, the second water quality detector 22 in the intermediate water area 2 detects that the mine water condition meets the water use condition of the lower demand, the sixth pipeline in the intermediate water area 2 and the softening area 4 will be activated, and the treatment direction of the mine water is Figure 3 As shown, the white color means that mine water can pass through, and the black color means that mine water cannot pass through.

[0046] The rapid treatment process is that when the mine water enters, the first switch 12 of the first dosing device 11 of the raw water area 1 will be turned on, and the mine water in the raw water area 1 will be desuspended and treated, and then it will be sent to the intermediate water area 2 through the second pipeline; the sixth pipeline of the intermediate water area 2 and the softening area 4 will be activated. Among them, a water flow enters the hardness removal area 3 through the intermediate water area 2. After entering the hardness removal area 3, the mine water enters the ion exchange resin tank 37 and the hardness ions therein are removed by the anion and cation exchange resin in the tank, and then enters the softening area 4 through the fourth pipeline. The softening area 4 has a plurality of parallel nanofiltration membrane components 41, and the salt in the mine water is removed here. After the treatment is completed, the mine water enters the water storage area 5 through the fifth pipeline. The water storage area 5 has a water storage area outlet 52 for softened mine water to be used underground. Another water stream passes through the intermediate water zone 2 to the softening zone 4, and after being desalinated by multiple parallel nanofiltration membrane components 41, it enters the water storage zone 5 through the fifth pipeline, and stores softened mine water in the water storage zone 5; at the same time, there is also an intermediate water zone outlet 25 at the bottom of the intermediate water zone 2 for use in operations with lower requirements on water quality.

[0047] According to Xiao Yan's "Ultrafiltration-Reverse Osmosis Process for Treatment of High Mineralization Mine Water Design and Operation", activated carbon filtration and ultrafiltration were combined for pretreatment, and reverse osmosis was used for further softening. After softening, Ca 2+ The influent concentration decreased from 28.2 mg / L to 0.12 mg / L, Mg 2+ The influent water content decreased from 7.26 mg / L to 0.02 mg / L, the total hardness decreased from 100 mg / L to 0.4 mg / L, and the TDS decreased from 5068 mg / L to 34.1 mg / L, with a softening effect of more than 90%. 2+ Mg 2+ The removal rate is over 75%, the hardness is reduced by over 80%, the mineralization is reduced by 70%~80%, and the TDS is reduced by 75%~85%.

[0048] The control panel will also control the operation and long-term use of the entire system. When the pressure sensor 35 or the flow sensor 36 sounds an alarm, the control panel will shut down the system; when the first water level gauge 14, the second water level gauge 21, and the third water level gauge 51 exceed the preset water level, the control panel will shut down the water pressure pump of the first part until its water level drops to 30%-50% of the preset water level; when the first water quality detector 13 detects that the mine water PH>9-10 or PH<1-2 and the mine water mineralization>7500mg / L, the control panel will shut down the system, and the mine water needs to be pre-treated before entering the system to soften; when the second water quality detector 22 detects that the mine water hardness is <100-150mg / L, the control panel will turn on the sixth water pressure pump 62 and the sixth Valve 61 allows the mine water in the middle water area 2 to enter the hardness removal area 3 and the softening area 4 at the same time, thereby accelerating the mine water treatment speed; when the flow sensor 36 is less than the set value, the control panel will turn on the seventh water pressure pump 63 and the seventh valve 64 in the seventh pipeline between the water storage area 5 and the hardness removal area 3 and the regeneration device switch 32 of the ion exchange resin regeneration device 31, dilute the treated mine water with the ion exchange regeneration liquid, and regenerate the anion and cation exchange resins in the hardness removal area; then delay 30-60 minutes to open the second switch 43 of the second dosing device 42, first flush the nanofiltration membrane of the nanometer-scale pore separation layer for the first time, and then dilute the treated mine water with the ion regeneration liquid and the surfactant, and flush the nanofiltration membrane of the nanometer-scale pore separation layer again.

[0049] For the mine underground water treatment system of the present invention, when the mine water flow rate needs to be reduced, that is, when the flow rate in the pipeline is significantly lower than the preset value, the seventh pipeline from the water storage area 5 to the hardening area 3 and the softening area 4 will be activated, and the treatment direction of the mine water is Figure 4 As shown, the white color means that mine water can pass through, and the black color means that mine water cannot pass through.

[0050] The pipeline between the mine water reuse area, that is, the raw water area 1 and the intermediate water area 2 will be disabled, and the reuse pipeline between the water storage area 5 and the hardness removal area 3 and the softening area 4 will be enabled. At this time, the regeneration device switch 32 of the ion exchange resin regeneration device 31 of the hardness removal area 3 will be enabled. The ion exchange regeneration liquid in the ion exchange resin regeneration device 31 is a 1% low-temperature NaCl solution, which is mixed with the softened mine water and used for the regeneration of the anion and cation exchange resins in the ion exchange resin tank 37; the second switch 43 of the second dosing device 42 of the softening area 4 will be delayed for 30-60 minutes to be enabled, and it will first perform a normal flushing on the nanofiltration membrane assembly 41, and then the second switch 43 of the second dosing device 42 will be opened, and the surfactant will be mixed with the softened mine water to flush the nanofiltration membrane assembly 41 again.

[0051] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A mine underground water treatment system, characterized by: It includes a raw water area (1), a reclaimed water area (2), a hardness removal area (3), a softening area (4), a water storage area (5) and a control panel; The raw water area (1) is connected to the coal mine water supply system via a first pipeline, and the first pipeline is provided with a first hydraulic pump (02) and a first valve (01); The intermediate water area (2) is connected to the raw water area (1) via a second pipeline, and a second water pressure pump (15) and a second valve (16) are provided on the second pipeline; a intermediate water area outlet (25) is provided at the bottom of the intermediate water area (2) for cooling the equipment; The hard removal zone (3) is connected to the intermediate water zone (2) via a third pipeline, and a third hydraulic pump (24) and a third valve (23) are provided on the third pipeline; an ion exchange resin tank (37) is provided inside the hard removal zone (3), and an anion and cation exchange resin is provided inside the ion exchange resin tank (37) to remove Ca in the mine water. 2+ Mg 2+ ; The softening zone (4) is connected to the hardening zone (3) via a fourth pipeline, and a fourth hydraulic pump (34) and a fourth valve (33) are provided on the fourth pipeline; the softening zone (4) is connected to the intermediate water zone (2) via a sixth pipeline, and a sixth hydraulic pump (61) and a sixth valve (62) are provided on the sixth pipeline; a nanofiltration membrane assembly (41) is provided inside the softening zone (4); The water storage area (5) is connected to the softening area (4) via a fifth pipeline, and a fifth hydraulic pump (45) and a fifth valve (44) are provided on the fifth pipeline; a water storage area outlet (52) is provided outside the water storage area (5) for spraying and dust reduction in the well; The above-mentioned hydraulic pumps and valves are all connected to the control panel, and the control panel controls their shutdown and startup.

2. The underground mine water treatment system according to claim 1, characterized in that: A first dosing device (11), a first water quality detector (12) and a first water level gauge (13) are provided on the top of the raw water area (1); PAC (polyaluminium chloride) and PAM (polyacrylamide) are respectively installed on both sides of the first dosing device (11); a first switch (12) is provided at the bottom of the first dosing device (11) for controlling the dosing amount; the first water quality detector (12) is used to detect the hardness, turbidity and salt content of the mine water; the first water level gauge (13) is used to detect the water level inside the raw water area (1); the first water quality detector (12), the first water level gauge (13) and the first switch (12) are all connected to the control panel.

3. The underground mine water treatment system according to claim 2, characterized in that: A second water level gauge (21) and a second water quality detector (22) are provided on the top of the intermediate water area (2), and both the second water level gauge (21) and the second water quality detector (22) are connected to the control panel; the second water level gauge (21) is used to detect the water level inside the intermediate water area (2); and the second water quality detector (22) is used to detect the components of the mine water.

4. The underground mine water treatment system according to claim 3, characterized in that: An ion exchange resin regeneration device (31) is provided on the top of the hard removal zone (3), and the ion exchange resin regeneration device (31) is connected to the ion exchange resin tank (37); an ion exchange regeneration liquid is provided in the ion exchange resin regeneration device (31), and the ion exchange regeneration liquid is composed of a 1% low-temperature NaCl solution; a regeneration device switch (32) is provided at the bottom of the ion exchange resin regeneration device (31) for controlling the outflow of the ion exchange regeneration liquid, and the regeneration device switch (32) is connected to the control panel.

5. The underground mine water treatment system according to claim 4, characterized in that: The softening zone (4) is provided with 4-6 groups of nanofiltration membrane assemblies (41) arranged in parallel. The nanofiltration membrane assembly (41) is composed of a nanofiltration membrane with a nano-pore separation layer, a pore size of 0.2-1.5 nm, a molecular weight cut-off of 200-1500 Da, and a pressure resistance of 1-5 MPa. The nanofiltration membrane assembly (41) is used to remove salt from the mine water and further soften the mine water. The softening zone (4) is provided with a second dosing device (42). The second dosing device (42) is provided with a surfactant cleaning agent for cleaning the nanofiltration membrane with a nano-pore separation layer. The bottom of the second dosing device (42) is provided with a second switch (43) for controlling the outflow of the surfactant cleaning agent. The second switch (43) is connected to the control panel.

6. The underground mine water treatment system according to claim 5, characterized in that: A third water level gauge (51) is provided on the top of the water storage area (5) for detecting the water level inside the water storage area (5), and the third water level gauge (51) is connected to the control panel; the water storage area (5) is connected to the ion exchange resin regeneration device (31) and the second dosing device (42) respectively through a seventh pipeline, and a seventh hydraulic pump (63) and a seventh valve (64) are provided on the seventh pipeline.

7. The underground mine water treatment system according to claim 6, characterized in that: Each pipeline is provided with a pressure sensor (35) and a flow sensor (36), and the pressure sensor (35) and the flow sensor (36) are both connected to the control panel.

8. The underground mine water treatment system according to claim 7, characterized in that: When the pressure sensor (35) or the flow sensor (36) sounds an alarm, the control panel will shut down the system; when the first water level gauge (13), the second water level gauge (21), and the third water level gauge (51) exceed the preset water level, the control panel will shut down the system; when the first water quality detector (12) detects that the pH and hardness of the mine water exceed the set value, the control panel will shut down the system; when the second water quality detector (22) detects that the hardness of the mine water exceeds the set value, the control panel will activate the sixth pipeline to connect the intermediate water area (2) and the softening area (4) to speed up the mine water treatment speed; when the flow rate is lower than the set value, the control panel will activate the ion exchange resin regeneration device (31) and the second dosing device (42) to ensure the working efficiency of the system.

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