Mine water underground short-process treatment system and process method thereof

Abstract

The invention relates to the technical field of coal mine underground water treatment systems and processes thereof, in particular to a mine water underground short-process treatment system and a process method thereof. The treatment system comprises a raw water bin, a primary filter, a direct filtration treatment subsystem and a clear water bin. According to the mine water underground short-process treatment system and the process method thereof provided by the invention, a plurality of links such as collection, conveying, primary treatment, direct filtration treatment and wastewater treatment are included, in-situ treatment and reuse of underground mine water are realized by adopting a relatively short process, the effluent quality is excellent, and the application range is wide; due to the fact that no coagulant or other agents are adopted, the complex process that the dosage is adjusted along with changes of water quality is avoided, unattended operation of the system can be truly achieved, and the labor operation intensity of underground workers is reduced. The direct filtration treatment subsystem comprises a direct filtration treatment module, a backwashing module, an emergency treatment module and the like so as to realize direct filtration treatment and direct filtration membrane backwashing and regeneration technological processes.

Description

Technical Field

[0001] The present invention relates to the field of coal mine underground water treatment system and process technology thereof, and in particular to an underground short-process mine water treatment system and process method thereof. Background Art

[0002] Coal mines that use comprehensive mining / excavation as the main mining method have a high concentration of suspended matter in the underground mine water. At the same time, the particle size distribution of the particles is uneven. The larger particles may be above 100μm, while the smaller particles may be less than 10μm. In addition, the amount of wastewater is large. If it is not purified, it will cause a huge waste of water resources.

[0003] In order to make underground mine water meet the requirements of clarification and reuse, the existing mine water treatment and utilization mode mainly adopts the method of collecting mine water underground and lifting it to the ground for purification treatment, and returning it to the underground for use after meeting the standards. The treatment process of this mode is relatively long. In order to make the mine water meet the requirements of underground water use, it needs to go through a series of treatments such as coagulation, sedimentation, filtration, and ultrafiltration. The treatment process is long, and the lifting energy consumption is high and the ground occupies a large area. At the same time, due to the addition of chemical agents such as coagulants, the dosage needs to be adjusted according to the changes in the water quality of the inlet water, and the resistance to water quality fluctuations is poor, which greatly increases the labor operation intensity of underground workers. Summary of the invention

[0004] The present invention provides a short-process underground mine water treatment system and a process method thereof, which are used to overcome the defects of the prior art that the underground mine water treatment process is long, the application range is narrow, and chemical agents such as coagulants need to be added for treatment. The system can be used for on-site treatment and reuse of mine water underground, and has the advantages of excellent effluent water quality, short treatment process, and wide application range.

[0005] The present invention provides a short-process underground mine water treatment system, comprising: Raw water tank; A primary filter connected to the raw water tank; A direct filtration treatment subsystem, the direct filtration treatment subsystem comprising: a direct filtration treatment module, a backwash module and an emergency treatment module; The direct filtration treatment module comprises: a plurality of direct filtration membrane groups connected in series, one end of which is connected to the primary filter; The backwash module can be connected to the direct filtration membrane group and is used to backwash the direct filtration membrane group; The emergency treatment module stores direct filtration membrane cleaning liquid and is connected to the direct filtration membrane group, and is used to regenerate and clean the direct filtration membrane group with the direct filtration membrane cleaning liquid; The clean water tank is connected to the other end of the plurality of direct filtration membrane groups connected in series.

[0006] According to the underground short-process mine water treatment system provided by the present invention, the primary filter comprises: A filter body connected between the raw water tank and the direct filtration processing module, wherein a filter element is arranged in the filter body; A cleaning brush, rotatably disposed inside the filter body, for cleaning the filter element; The driving unit is arranged on the filter body and connected with the cleaning brush to drive the cleaning brush to rotate.

[0007] According to the underground short-process mine water treatment system provided by the present invention, a support seat is provided on the top of the filter body.

[0008] According to the underground short-process mine water treatment system provided by the present invention, the direct filtration membrane group includes: a fixing frame, a first pipeline, a second pipeline, a water production pipeline and a plurality of direct filtration membrane shells; wherein, The first pipeline, the second pipeline, and the water production pipeline are respectively fixed on the fixing frame, and form a water inlet, a concentrated water outlet, and a clean water outlet respectively; The direct filtration membrane shells are respectively erected on both sides of the fixing frame, and a direct filtration membrane body is arranged inside the direct filtration membrane shells. The direct filtration membrane shells are formed with a first joint, a second joint and a third joint, the first joint is connected to the first pipeline, the second joint is connected to the second pipeline, and the third joint is connected to the water production pipeline; One end of the direct filtration membrane shell is provided with a detachable end cover, and the end cover is connected to the direct filtration membrane shell via a clamping device.

[0009] According to the underground short-process mine water treatment system provided by the present invention, the direct filtration treatment subsystem comprises: a first direct filtration membrane group and a second direct filtration membrane group connected in series; wherein, The water inlet of the first direct filtration membrane group is connected to the clean water outlet of the primary filter, the water inlet of the second direct filtration membrane group is connected to the concentrated water outlet of the first direct filtration membrane group, and the concentrated water outlet of the second direct filtration membrane group is connected to the water inlet of the first direct filtration membrane group and / or the primary filter through a reflux pipe; The clean water outlets of the first direct filtration membrane group and the second direct filtration membrane group are respectively connected to the clean water tank; The concentrated water outlet of the primary filter and the concentrated water outlet of the second direct filtration membrane group are also connected to the wastewater trench.

[0010] According to the underground short-process mine water treatment system provided by the present invention, A first pump is arranged between the raw water tank and the primary filter; A water inlet valve and a second pump are sequentially provided at the water inlet of the first direct filtration membrane group; A first discharge valve is also provided between the second pump and the first direct filtration membrane group; A first water production flow monitoring device and a first water production valve are provided in sequence at the clean water outlet of the first direct filtration membrane group; A second discharge valve is also provided between the concentrated water outlet of the first direct filtration membrane group and the water inlet of the first direct filtration membrane group; A second water production flow monitoring device and a second water production valve are provided in sequence at the clean water outlet of the second direct filtration membrane group; A third water production valve is provided upstream of the clean water tank; A circulation valve is provided on the return pipe, and the return pipe is connected to a third discharge valve for discharging waste water; The clean water outlet is provided with an automatic breathing exhaust valve.

[0011] According to the underground short-process mine water treatment system provided by the present invention, the backwash module is connected upstream of the third water production valve and is equipped with a backwash water inlet valve. The backwash module is used to backwash the first direct filtration membrane group and / or the second direct filtration membrane group.

[0012] According to the underground short-process mine water treatment system provided by the present invention, the emergency treatment module comprises: a water tank, a first control valve, a liquid supply pump, a second control valve and a water filter connected in sequence; The water tank is provided with at least a first water inlet and a second water inlet, the first water inlet is connected to the clean water tank, the second water inlet is connected to the return pipe, and the water tank stores direct filtration membrane cleaning liquid; The water tank is also provided with a fourth discharge valve for discharging waste water; The outlet of the water filter is connected between the water inlet valve and the second pump.

[0013] According to the underground short-process mine water treatment system provided by the present invention, when the first direct filtration membrane group needs to be backwashed, the backwash water inlet valve, the first water production valve and the second discharge valve are opened, and the remaining valves are closed; When the second direct filtration membrane group needs to be backwashed, the backwash water inlet valve, the second water production valve and the third discharge valve are opened, and the other valves are closed; When cleaning the water inlet end of the membrane group, the backwash water inlet valve, the first water production valve and the fourth discharge valve are opened, and the other valves are closed; When the first direct filtration membrane group and the second direct filtration membrane group are backwashed simultaneously, the backwash water inlet valve, the first water production valve, and the second water production valve are opened, and the second discharge valve, the third discharge valve, and the fourth discharge valve are opened simultaneously or alternately.

[0014] According to the underground short-process mine water treatment system provided by the present invention, the water tank is a circular cone-bottom water tank or a square water tank, and the bottom plate of the water tank forms a slope, and the slope ranges from 1° to 25°; the filtration accuracy of the water filter is greater than 300μm.

[0015] According to the underground short-process mine water treatment system provided by the present invention, the bottom of the wastewater trench is formed with an uneven surface by rocks and / or gravel.

[0016] According to the underground short-process mine water treatment system provided by the present invention, the direct filtration membrane body is a rolled direct filtration membrane, and its membrane flow channel is an open flow channel, which is corrugated or wavy, so as to reduce the flow resistance of mine water in the membrane; the material of the direct filtration membrane body is made of conductive polymer.

[0017] The present invention also provides a process method using the underground short-process mine water treatment system of the present invention, comprising: S1. Collect the mine water underground into the raw water tank, and adjust the water quantity and quality of the mine water and precipitate it in the raw water tank; S2. Lead the mine water in the raw water tank into the primary filter to remove large particles and impurities to prevent scratching of the direct filter membrane; S3. The mine water after primary treatment by the primary filter is introduced into the direct filtration treatment subsystem to remove small particle impurities; S4. The clean mine water treated by the direct filtration treatment subsystem is collected in the clean water tank, stored in the clean water tank, and reused for underground water use; S5. The wastewater generated by the direct filtration treatment subsystem and the primary filter is introduced into the wastewater ditch.

[0018] The present invention provides a short-process underground mine water treatment system and a process method thereof, which include multiple links such as collection, transportation, primary treatment, direct filtration treatment, and wastewater treatment, and adopts a shorter process to achieve on-site treatment and reuse of underground mine water, with excellent effluent quality and a wide range of applications; since no coagulants and other agents are used, the complex process of adjusting the dosage as the water quality changes is avoided, and the unattended operation of the system can be truly realized, reducing the labor operation intensity of underground workers; the direct filtration treatment subsystem includes several parts such as a direct filtration treatment module, a backwash module, and an emergency treatment module to realize direct filtration treatment and direct filtration membrane backwashing and regeneration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is an overall schematic diagram of the underground short-process mine water treatment system provided by the present invention.

[0021] Figure 2 It is an overall schematic diagram of the primary filter provided by the present invention.

[0022] Figure 3 It is a process principle diagram of the direct filtration treatment subsystem provided by the present invention.

[0023] Figure 4 It is a schematic structural diagram of the direct filtration membrane group provided by the present invention.

[0024] Figure 5 It is a structural schematic diagram of the direct filtration membrane shell provided by the present invention.

[0025] Figure 6 It is a schematic structural diagram of the direct filtration membrane provided by the present invention.

[0026] Figure 7 It is a structural schematic diagram of the emergency processing module provided by the present invention.

[0027] Figure 8 It is a schematic structural diagram of the wastewater ditch provided by the present invention.

[0028] Reference numerals: 1-raw water tank, 2-first pump, 3-primary filter, 4-direct filtration treatment subsystem, 5-clean water tank, 6-wastewater trench, 3.1-filter body, 4.1-water inlet valve, 4.2-second pump, 4.3-first direct filtration membrane group, 4.4-second direct filtration membrane group, 4.5-emergency water inlet valve, 4.6-first discharge valve, 4.7-first produced water flow monitoring device, 4.8-circulation valve, 4.9-second discharge valve, 4.10-third discharge valve, 4.11-second produced water flow monitoring device, 4.12-concentrated water control valve, 4.13-concentrated water regulating valve, 4.14-concentrated water flow monitoring device, 4.15-concentrated water reflux valve, 4.16-backwashing water inlet valve, 4.17-produced water reflux valve, 4.18-third Water production valve, 4.19-first water production valve, 4.20-second water production valve, 8.1-saddle-shaped binding seat, 8.2-straight filter membrane housing, 8.3-straight filter membrane fixing frame, 8.4-first pipeline, 8.5-pipe fixing frame, 8.6-second pipeline, 8.7-water production pipeline, 8.8-first clamp, 8.9-second clamp, 8.21-first joint, 8.22-second joint, 8.23-water production joint, 8.24-fixing card, 8.25-circlip, 8.27-housing, 7.1-water tank, 7.2-fourth discharge valve, 7.3-first water inlet, 7.4-second water inlet, 7.5-spare interface, 7.6-first control valve, 7.7-liquid supply pump, 7.8-second control valve, 7.9-water filter. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0030] In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present embodiment.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this embodiment, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] Combine the following Figure 1-Figure 8 The present invention describes an underground short-process mine water treatment system, which includes: a raw water tank 1, a primary filter 3, a direct filtration treatment subsystem 4, a clean water tank 5 and a wastewater ditch 6, etc.

[0035] A raw water tank 1; a primary filter 3, connected to the raw water tank 1; a direct filtration treatment subsystem 4, the direct filtration treatment subsystem 4 includes: a direct filtration treatment module, a backwash module and an emergency treatment module; the direct filtration treatment module includes: a plurality of direct filtration membrane groups connected in series, and one end of which is connected to the primary filter 3; The backwash module can be connected to the direct filtration membrane group to backwash the direct filtration membrane group; The emergency treatment module stores direct filtration membrane cleaning liquid and is connected to the direct filtration membrane group for regenerating and cleaning the direct filtration membrane group with the direct filtration membrane cleaning liquid; the clean water tank 5 is connected to the other end of the multiple direct filtration membrane groups connected in series.

[0036] The specific process of the present invention is as follows: S1, raw water tank 1 is used to collect mine water, and the raw water tank 1 regulates the water quantity and water quality of the mine water, as well as performs preliminary sedimentation; S2. After sedimentation, the mine water in the raw water tank 1 is introduced into the primary filter 3 by the first pump 2 for preliminary treatment, mainly to remove large particles and prevent scratching of the direct filter membrane; S3, introducing the mine water after primary treatment by the primary filter 3 into the direct filtration treatment subsystem 4 for deep treatment to remove impurities such as particulate matter, oil, and macromolecular organic matter in the water; S4, the clean mine water treated by the direct filtration treatment subsystem 4 is collected in the clean water tank 5, stored in the clean water tank 5, and reused for the underground spray water, fire sprinkler, equipment cooling, emulsion proportioning and other purposes; When the back-end water-using equipment has higher requirements for the hardness and ion concentration of the water, a reverse osmosis treatment system is connected to the clean water tank 5 for further deep desalination treatment. The reverse osmosis treatment system consists of a booster pump, a security filter, a reverse osmosis membrane group, an antiscalant dosing device, etc. S5. The wastewater generated by the direct filtration treatment subsystem 4 and the primary filter 3 is introduced into the wastewater ditch 6, and is further transported from the wastewater ditch 6 to the sedimentation tank / system or returned to the raw water tank 1.

[0037] It can be seen that the underground short-process mine water treatment system provided by the present invention includes multiple links such as collection, transportation, primary treatment, direct filtration treatment, and wastewater treatment, and adopts a shorter process to realize on-site treatment and reuse of underground mine water. The effluent water quality is excellent and the scope of application is wide. Since coagulants and other agents are not used, the complex process of adjusting the dosage of the agent as the water quality changes is avoided, and the unattended operation of the system can be truly realized, reducing the labor operation intensity of underground workers. The direct filtration treatment subsystem 4 includes several parts such as a direct filtration treatment module, a backwash module and an emergency treatment module to realize direct filtration treatment and direct filtration membrane backwashing and regeneration process.

[0038] In one embodiment of the present invention, the primary filter 3 includes: a filter body 3.1, a cleaning brush and a driving unit. The filter body 3.1 is connected between the raw water tank 1 and the direct filtration processing module, and a filter element is arranged inside the filter body 3.1; the cleaning brush is rotatably arranged inside the filter body 3.1 for brushing the filter element; the driving unit is arranged on the filter body 3.1 and connected to the cleaning brush for driving the cleaning brush to rotate. Specifically, the primary filter 3 in this embodiment mainly performs preliminary filtration through the filter element, and the driving unit can be used to drive the cleaning brush to clean the surface of the filter element, and the large particles that fall off the surface of the filter element are discharged through the sewage outlet.

[0039] Through the description of the above embodiments, the primary filter 3 is mainly used to remove large particles and prevent large particles from entering the direct filtration treatment subsystem 4 and scratching the direct filtration membrane. The filter is a filter with automatic or manual cleaning and drainage functions, and products such as cyclone separators, media filters, and brush filters can be selected. The preferred primary filter 3 of this system is designed as follows: The primary filter 3 is also provided with a control system, which is composed of a controller (or PLC) and a combination switch, and can clean the primary filter 3 according to time or pressure difference, wherein the combination switch is used to power the motor, and the controller is used to output control signals to the motor and the electric valve.

[0040] In one embodiment of the present invention, the direct filtration membrane group includes: a fixing frame, a first pipeline 8.4, a second pipeline 8.6, a water production pipeline 8.7 and a plurality of direct filtration membrane shells 8.2. The first pipeline 8.4, the second pipeline 8.6 and the water production pipeline 8.7 are fixed on the fixing frame respectively, and form a water inlet, a concentrated water outlet and a clean water outlet respectively; the direct filtration membrane shells 8.2 are respectively erected on both sides of the fixing frame, and a direct filtration membrane body is arranged inside the direct filtration membrane shells 8.2. The direct filtration membrane shells 8.2 are formed with a first joint 8.21, a second joint 8.22 and a third joint, the first joint 8.21 is connected to the first pipeline 8.4, the second joint 8.22 is connected to the second pipeline 8.6, and the third joint is connected to the water production pipeline 8.7; one end of the direct filtration membrane shell 8.2 has a detachable end cap, and the end cap is connected to the direct filtration membrane shell 8.2 by a clamping device. Specifically, the fixing frame is composed of two parts, one part is the direct filter membrane fixing frame 8.3, which is used to fix the direct filter membrane shell 8.2, and the other part is the pipe fixing frame 8.5, which is used to fix the first pipe 8.4, the second pipe 8.6, and the water production pipe 8.7. The specific filtering process of the direct filter membrane group is as follows: water enters from the first pipe 8.4 and is respectively transported to the direct filter membrane shells 8.2 on both sides for direct filtration, and the produced water is discharged from the third joint through the water production pipe 8.7, and the concentrated water is discharged from the second joint 8.22 through the second pipe 8.6. A wastewater channel can be set at the position of the second pipe 8.6. The clamping device can be composed of a clamping spring 8.25 and a fixing clamp 8.24.

[0041] According to the structure of the direct filtration membrane group in the above embodiment, a specific method is provided: The direct filter membrane group is composed of a saddle-shaped binding seat 8.1, a direct filter membrane shell 8.2, a direct filter membrane fixing frame 8.3, a first pipeline 8.4, a pipeline fixing frame 8.5, a second pipeline 8.6, a water production pipeline 8.7, a first clamp 8.8, and a second clamp 8.9. Among them, the direct filter membrane shell 8.2 is composed of a first joint 8.21, a second joint 8.22, a water production joint 8.23, a fixing clamp 8.24, a clamp spring 8.25 and a shell 8.27. The direct filtration membrane shell 8.2 can adopt various types of separation membrane shells. Preferably, a first joint 8.21, a second joint 8.22, and a water production joint 8.23 ​​are provided, which serve as the membrane shell water inlet, concentrated water and water production pipelines 8.7 respectively (the water inlet and concentrated water pipelines can be interchanged). The membrane shell adopts a quick disassembly design and uses a joint as an external joint, which is convenient for fixing and disassembly. The direct filtration membrane shell 8.2 adopts a retaining spring 8.25 as a clamping device on one side of the direct filtration membrane to fix the membrane shell end cover on the membrane shell. The retaining spring 8.25 is spring-shaped, and one section of it is provided with a protrusion to lift the retaining spring 8.25. The retaining spring 8.25 is fixed by a fixing clamp 8.24.

[0042] The first pipeline 8.4, the second pipeline 8.6, and the water production pipeline 8.7 are provided with a plurality of branch pipes on both sides, and the other end of each branch pipe is a joint, which is respectively connected to the first joint 8.21, the second joint 8.22, and the water production joint (i.e., the third joint) 8.23, and is fixed by the first clamp 8.8 and the second clamp 8.9. Among them, the first pipeline 8.4 and the second pipeline 8.6 can be interchanged, and serve as the main water inlet pipeline and the concentrated water pipeline. The straight filter membrane shell 8.2 is fixed to the straight filter membrane fixing frame 8.3 through the saddle-shaped binding seat 8.1, and the second pipeline 8.6 and the water production pipeline 8.7 are fixed to the pipeline fixing frame 8.5, and the pipeline fixing frame 8.5 is connected to the straight filter membrane fixing frame 8.3 through bolts or slots. In this way, when the straight filter membrane group is inconvenient to go down the well, it can be disassembled into multiple components and parts for going down the well. At the same time, according to the size of the underground space, this straight filter membrane group can be placed vertically or horizontally.

[0043] One or more direct filtration membranes are installed in the direct filtration membrane shell 8.2. The requirements of this process for the direct filtration membrane are that the filtration accuracy is not less than 1μm, the hydrophilicity is good, and the corrosion resistance is strong and the pollution resistance is strong. The preferred direct filtration membrane selected in this scheme is a roll-type direct filtration membrane. Its membrane flow channel is an open flow channel, which is corrugated or wavy to reduce the flow resistance of mine water in the membrane. At the same time, the direct filtration membrane material adopts a conductive polymer direct filtration membrane. The conjugated structure of the conductive polymer makes the direct filtration membrane material have the toughness of traditional polymer membrane materials such as PVDF, and has a certain rigidity. The conductive polymer is used as a membrane liquid and fixed on the membrane by methods such as scraping, electrostatic spinning, and interfacial polymerization to form a direct filtration membrane. The direct filtration membrane formed by the conductive polymer has a PH tolerance range of 1~13.5, a hydrophilic contact angle of less than 90 degrees, a filtration accuracy of not less than 0.1μm, and can tolerate an oil content of 50mg / L~10g / L, and has strong anti-fouling and blocking properties.

[0044] In one embodiment of the present invention, the direct filtration treatment subsystem 4 includes: a first direct filtration membrane group and a second direct filtration membrane group connected in series; the water inlet of the first direct filtration membrane group is connected to the clean water outlet of the primary filter 3, the water inlet of the second direct filtration membrane group is connected to the concentrated water outlet of the first direct filtration membrane group, and the concentrated water outlet of the second direct filtration membrane group is connected to the water inlet of the first direct filtration membrane group and / or the primary filter 3 through a reflux pipe; the clean water outlets of the first direct filtration membrane group and the second direct filtration membrane group are respectively connected to the clean water tank 5; the concentrated water outlet of the primary filter 3 and the concentrated water outlet of the second direct filtration membrane group are also connected to the wastewater ditch 6. Specifically, the present embodiment sets two direct filtration membrane groups in series, and according to actual needs, multiple direct filtration membrane groups can be set in series. In the present embodiment, the first direct filtration membrane group and the second direct filtration membrane group can realize circulation filtration through the reflux pipe, or the concentrated water can be directly discharged into the wastewater ditch 6, and the filtration process can be adjusted.

[0045] In one embodiment of the present invention, the wastewater ditch 6 is constructed by utilizing the original underground tunnel, and its height is flush with or slightly lower than the original tunnel, and the wastewater is further transported to the sedimentation tank / system or returned to the raw water tank 1 by the wastewater ditch 6. Preferably, the wastewater ditch 6 in this solution has an uneven surface formed by rocks or gravel at the groove, and the groove is sometimes smooth and sometimes has different heights along the conveying process, so that while the groove is conducting wastewater, the unevenness can also play a role in secondary interception, purification and sedimentation of the wastewater, thereby reducing the processing burden of the next link.

[0046] In one embodiment of the present invention, a first pump 2 is arranged between the raw water tank and the primary filter 3; a water inlet valve 4.1 and a second pump 4.2 are arranged at the water inlet of the first straight filter membrane group; a first discharge valve 4.6 is also arranged between the second pump 4.2 and the first straight filter membrane group; a first water production flow monitoring device 4.7 and a first water production valve 4.19 are arranged at the clean water outlet of the first straight filter membrane group; a second discharge valve 4.9 is also arranged between the concentrated water outlet of the first straight filter membrane group and the water inlet of the first straight filter membrane group; a second water production flow monitoring device 4.11 and a second water production valve 4.20 are arranged at the clean water outlet of the second straight filter membrane group; a third water production valve 4.18 is arranged upstream of the clean water tank 5; a circulation valve 4.8 is arranged on the return pipe, and the return pipe is connected to the third discharge valve 4.10 for discharging waste water; an automatic breathing exhaust valve is arranged at the clean water outlet to discharge air in the system to prevent air from accumulating in the pipe and reducing the water production rate.

[0047] According to the structure of the direct filtration treatment module in the above embodiment, when the equipment is in the water production state, the water inlet valve 4.1, the second pump 4.2, the circulation valve 4.8, the concentrated water control valve 4.12, the third water production valve 4.18, the first water production valve 4.19 and the second water production valve 4.20 are opened, and the other valves are closed. At this time, after the first direct filtration membrane group 4.3 enters the water, it is divided into two parts of produced water and concentrated water after being processed by the direct filtration membrane, wherein the concentrated water produced by the first direct filtration membrane group 4.3 is used as the water inlet of the second direct filtration membrane group 4.4, and part of the concentrated water produced by the second direct filtration membrane group 4.4 flows back to the inlet end of the second pump 4.2 and / or the primary filter 3 through the circulation valve 4.8, and part of it flows through the concentrated water control valve 4.12, and the concentrated water flow is adjusted by the concentrated water regulating valve 4.13 (the flow can be monitored by the concentrated water flow monitoring device 4.14), and then discharged to the wastewater ditch 6.

[0048] In one embodiment of the present invention, the backwash module is connected to the upstream of the third water production valve 4.18 and is provided with a backwash water inlet valve 4.16. The backwash module is used to backwash the first straight filter membrane group and / or the second straight filter membrane group. The backwash module can use the clean water in the clean water tank 5 for backwashing. After opening the backwash water inlet valve 4.16, the first straight filter membrane group or the second straight filter membrane group 4.4 can be backwashed separately as needed, or both can be backwashed at the same time, and the water inlet can also be flushed. When the first straight filtration membrane group 4.3 needs to be backwashed, the backwash inlet valve 4.16, the first water production valve 4.19 and the second discharge valve 4.9 are opened, and the other valves are closed; when the second straight filtration membrane group 4.4 needs to be backwashed, the backwash inlet valve 4.16, the second water production valve 4.20 and the third discharge valve 4.10 are opened, and the other valves are closed; when the water inlet end of the membrane group is cleaned, the backwash inlet valve 4.16, the first water production valve 4.19 and the fourth discharge valve 7.2 are opened, and the other valves are closed; when the first straight filtration membrane group 4.3 and the second straight filtration membrane group 4.4 are selected to be backwashed at the same time, the backwash inlet valve 4.16, the first water production valve 4.19, the second water production valve 4.20 are opened, and the second discharge valve 4.9, the third discharge valve 4.10 and the fourth discharge valve 7.2 are opened simultaneously or alternately.

[0049] In one embodiment of the present invention, the emergency treatment module and the direct filtration treatment module are controlled by an emergency water inlet valve 4.5. The emergency treatment module includes: a water tank 7.1, a first control valve 7.6, a liquid supply pump 7.7, a second control valve 7.8 and a water filter 7.9 connected in sequence. Among them, the water tank 7.1 is at least provided with a first water inlet 7.3 and a second water inlet 7.4, the first water inlet 7.3 is connected to the clean water tank 5, the second water inlet 7.4 is connected to the reflux pipe, and the water tank 7.1 stores direct filtration membrane cleaning liquid; the water tank 7.1 is also provided with a fourth discharge valve 7.2 for discharging wastewater; the outlet of the water filter 7.9 is connected between the water inlet valve 4.1 and the second pump 4.2. The emergency treatment module is used to restore the performance of the direct filtration membrane when the direct filtration treatment module is blocked or fails. The water tank 7.1 is provided with a first water inlet 7.3, a second water inlet 7.4 and a spare interface 7.5. The first water inlet 7.3 and the second water inlet 7.4 are respectively connected to the concentrated water return port and the produced water return port of the direct filtration treatment module; the water tank 7.1 is used to store the direct filtration membrane cleaning liquid. Preferably, the water tank 7.1 is a circular cone bottom water tank or a square water tank, and the bottom plate of the water tank 7.1 has a certain slope, and the slope range is 1°~25°. This design is mainly to facilitate the rapid discharge of residual pollutants in the water tank 7.1 after the cleaning is completed. The filtration accuracy of the water filter 7.9 is greater than 300μm, and it mainly filters the pollutants cleaned out of the cleaning liquid. The cleaning liquid in the water tank 7.1 passes through the first control valve 7.6, the liquid supply pump 7.7, the second control valve 7.8, the water filter 7.9, and then passes through the emergency module water inlet to enter the direct filtration treatment module. When emergency treatment is performed on the direct filtration treatment module, the second pump 4.2, the concentrated water return valve 4.15, the produced water return valve 4.17 and the circulation valve 4.8 in the direct filtration treatment module are opened, and the cleaning liquid circulates between the emergency treatment module and the direct filtration treatment module to regenerate and clean the direct filtration membrane, and the waste liquid after cleaning is discharged from the water tank 7.1 through the discharge valve 7.2.

[0050] When the underground space is limited, the emergency treatment module can also be used as the backwash system of the direct filtration treatment module. At this time, the water filter 7.9 has at least one water outlet, which is respectively connected to the emergency water inlet and the backwash water inlet of the direct filtration treatment module.

[0051] The present invention also provides a process method using the underground short-process mine water treatment system in the embodiment of the present invention, which comprises the following steps: S1, collecting the underground mine water into the raw water tank 1, and regulating the water quantity and water quality and settling the mine water by the raw water tank 1; S2, introducing the mine water in the raw water tank 1 into the primary filter 3 to remove large particles and impurities to prevent scratching of the direct filter membrane; S3, introducing the mine water after primary treatment by the primary filter 3 into the direct filtration treatment subsystem 4 to remove small particle impurities; S4, the clean mine water treated by the direct filtration treatment subsystem 4 is collected in the clean water tank 5, stored in the clean water tank 5, and reused for underground water use; S5. The wastewater generated by the direct filtration treatment subsystem 4 and the primary filter 3 is introduced into the wastewater ditch 6.

[0052] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed over multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A short-process underground mine water treatment system, characterized in that: include: Raw water tank (1); A primary filter (3) connected to the raw water tank (1); A direct filtration treatment subsystem (4), the direct filtration treatment subsystem (4) comprising: a direct filtration treatment module, a backwash module and an emergency treatment module; The direct filtration treatment module comprises: a plurality of direct filtration membrane groups connected in series, one end of which is connected to the primary filter (3); The backwash module can be connected to the direct filtration membrane group and is used to backwash the direct filtration membrane group; The emergency treatment module stores direct filtration membrane cleaning liquid and is connected to the direct filtration membrane group, and is used to regenerate and clean the direct filtration membrane group with the direct filtration membrane cleaning liquid; The clear water tank (5) is connected to the other end of the plurality of direct filtration membrane groups connected in series.

2. The underground short-process mine water treatment system according to claim 1 is characterized in that: The primary filter (3) comprises: A filter body (3.1) is connected between the raw water tank (1) and the direct filtration processing module, and a filter element is arranged in the filter body (3.1); a cleaning brush, rotatably arranged inside the filter body (3.1) and used for cleaning the filter element; A driving unit is provided on the filter body (3.1) and is connected to the cleaning brush, and is used to drive the cleaning brush to rotate.

3. The underground short-process mine water treatment system according to claim 1 is characterized in that: The direct filtration membrane group comprises: a fixing frame, a first pipeline (8.4), a second pipeline (8.6), a water production pipeline (8.7) and a plurality of direct filtration membrane shells (8.2); wherein: The first pipeline (8.4), the second pipeline (8.6), and the water production pipeline (8.7) are respectively fixed on the fixing frame, and respectively form a water inlet, a concentrated water outlet, and a clean water outlet; The direct filtration membrane housing (8.2) is respectively erected on both sides of the fixing frame, a direct filtration membrane body is arranged inside the direct filtration membrane housing (8.2), and the direct filtration membrane housing (8.2) is formed with a first joint (8.21), a second joint (8.22) and a third joint, the first joint (8.21) is connected to the first pipeline (8.4), the second joint (8.22) is connected to the second pipeline (8.6), and the third joint is connected to the water production pipeline (8.7); One end of the direct filtration membrane housing (8.2) is provided with a detachable end cover, and the end cover is connected to the direct filtration membrane housing (8.2) via a clamping device.

4. The underground short-process mine water treatment system according to any one of claims 1 to 3, characterized in that: The direct filtration treatment subsystem (4) comprises: a first direct filtration membrane group (4.3) and a second direct filtration membrane group (4.4) connected in series; wherein: The water inlet of the first direct filtration membrane group (4.3) is connected to the clean water outlet of the primary filter (3), the water inlet of the second direct filtration membrane group (4.4) is connected to the concentrated water outlet of the first direct filtration membrane group (4.3), and the concentrated water outlet of the second direct filtration membrane group (4.4) is connected to the water inlet of the first direct filtration membrane group (4.3) and / or the primary filter (3) through a reflux pipe; The clean water outlets of the first direct filtration membrane group (4.3) and the second direct filtration membrane group (4.4) are respectively connected to the clean water tank (5); The concentrated water outlet of the primary filter (3) and the concentrated water outlet of the second direct filtration membrane group (4.4) are also connected to the wastewater trench (6).

5. The underground short-process mine water treatment system according to claim 4 is characterized in that: A first pump (2) is provided between the raw water tank (1) and the primary filter (3); A water inlet valve (4.1) and a second pump (4.2) are provided in sequence at the water inlet of the first direct filtration membrane group (4.3); A first discharge valve (4.6) is also provided between the second pump (4.2) and the first direct filtration membrane group (4.3); A first water production flow monitoring device (4.7) and a first water production valve (4.19) are provided in sequence at the clean water outlet of the first direct filtration membrane group (4.3); A second discharge valve (4.9) is also provided between the concentrated water outlet of the first direct filtration membrane group (4.3) and the water inlet of the first direct filtration membrane group (4.3); A second water production flow monitoring device (4.11) and a second water production valve (4.20) are provided in sequence at the clean water outlet of the second direct filtration membrane group (4.4); A third water production valve (4.18) is provided upstream of the clean water tank (5); A circulation valve (4.8) is provided on the return pipe, and the return pipe is connected to a third discharge valve (4.10) for discharging waste water; The clean water outlet is provided with an automatic breathing exhaust valve.

6. The underground short-process mine water treatment system according to claim 5, characterized in that: The backwash module is connected upstream of the third water production valve (4.18) and is provided with a backwash water inlet valve (4.16). The backwash module is used to backwash the first direct filtration membrane group (4.3) and / or the second direct filtration membrane group (4.4).

7. The underground short-process mine water treatment system according to claim 6 is characterized in that: The emergency treatment module comprises: a water tank (7.1), a first control valve (7.6), a liquid supply pump (7.7), a second control valve (7.8) and a water filter (7.9) which are connected in sequence; The water tank (7.1) is provided with at least a first water inlet (7.3) and a second water inlet (7.4), the first water inlet (7.3) being connected to the clean water tank (5), the second water inlet (7.4) being connected to the return pipe, and the water tank (7.1) storing direct filtration membrane cleaning liquid; The water tank (7.1) is also provided with a fourth discharge valve (7.2) for discharging waste water; The outlet of the water filter (7.9) is connected between the water inlet valve (4.1) and the second pump (4.2).

8. The underground short-process mine water treatment system according to claim 7 is characterized in that: When the first direct filtration membrane group (4.3) needs to be backwashed, the backwash water inlet valve (4.16), the first water production valve (4.19) and the second discharge valve (4.9) are opened, and the remaining valves are closed; When the second direct filtration membrane group (4.4) needs to be backwashed, the backwash water inlet valve (4.16), the second water production valve (4.20) and the third discharge valve (4.10) are opened, and the remaining valves are closed; When cleaning the water inlet end of the membrane group, the backwash water inlet valve (4.16), the first water production valve (4.19) and the fourth discharge valve (7.2) are opened, and the other valves are closed; When the first direct filtration membrane group (4.3) and the second direct filtration membrane group (4.4) are backwashed simultaneously, the backwash water inlet valve (4.16), the first water production valve (4.19), and the second water production valve (4.20) are opened, and the second discharge valve (4.9), the third discharge valve (4.10), and the fourth discharge valve (7.2) are opened simultaneously or alternately.

9. The underground short-process mine water treatment system according to claim 7, characterized in that: The water tank (7.1) is a circular cone-bottom water tank or a square water tank, and the bottom plate of the water tank (7.1) forms a slope, and the slope has a value range of 1° to 25°; the filtering accuracy of the water filter (7.9) is greater than 300 μm.

10. The underground short-process mine water treatment system according to claim 3, characterized in that: The direct filtration membrane body is a roll-type direct filtration membrane, and its membrane flow channel is an open flow channel, which is corrugated or wavy, so as to reduce the flow resistance of mine water in the membrane; The material of the direct filtration membrane body is made of conductive polymer.

11. The underground short-process mine water treatment system according to claim 4, characterized in that: The bottom of the wastewater ditch has an uneven surface formed by rocks and / or gravel.

12. A process method using the underground short-process mine water treatment system according to any one of claims 1 to 11, characterized in that: include: S1, collecting the mine water underground into the raw water tank (1), and regulating the water quantity and water quality of the mine water and performing sedimentation in the raw water tank (1); S2, introducing the mine water in the raw water tank (1) into the primary filter (3) to remove large particles and impurities to prevent scratching of the direct filter membrane; S3, introducing the mine water after primary treatment by the primary filter (3) into the direct filtration treatment subsystem (4) to remove small particle impurities; S4, collecting the clean mine water treated by the direct filtration treatment subsystem (4) into the clean water tank (5), storing it in the clean water tank (5), and recycling it for underground water use; S5. The wastewater generated by the direct filtration treatment subsystem (4) and the primary filter (3) is introduced into the wastewater trench (6).

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