Underground comprehensive water supply purification device

Abstract

The utility model belongs to the technical field of mine water equipment, and particularly relates to an underground comprehensive water supply and purification device which comprises a coarse filtration unit, a fiber filtration unit, a fine filtration unit, an RO (reverse osmosis) unit, a dosing unit, a control unit and an equipment frame, the coarse filtration unit is provided with two coarse filtration branch pipes, the first coarse filtration branch pipe is connected with a water outlet, and the second coarse filtration branch pipe is connected with a water outlet. A water outlet pipeline of the fiber filtering unit is provided with three fiber filtering branch pipes, the first fiber filtering branch pipe is connected with a water outlet, the second fiber filtering branch pipe is connected with a drain outlet, the third fiber filtering branch pipe is connected with a water inlet of the fine filtering unit, and a water outlet of the fine filtering unit is connected with a water inlet of the RO unit; the RO unit is divided into a concentrated water discharge pipeline and a pure water discharge pipeline, a dosing port of the dosing unit is arranged on a water inlet pipeline of the fine filtration unit, the control unit is used for controlling the water supply purification device, the water supply purification device can realize graded water supply, and the economical efficiency of underground water supply is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of mine water equipment, specifically relating to an underground integrated water supply and purification device. Background Technology

[0002] Coal mine operations, including mining, dust control, fire fighting, and daily water use, all require a stable and sufficient water source. This water source must not only meet quantity requirements but also certain water quality standards.

[0003] Due to varying water quality standards across different scenarios, the demand for integrated underground water treatment equipment has emerged to meet various factors, including production needs, ensuring safe production, improving water supply efficiency and quality, adapting to complex geological conditions, and reducing operating costs and maintenance difficulties. Utility Model Content

[0004] In view of the problems existing in the background technology, this utility model discloses an underground integrated water supply and purification device, which can realize graded water supply, and supply water in different grades according to the different water quality requirements of water-using equipment, thereby improving the economic efficiency of water supply.

[0005] To achieve the above objectives, the present invention specifically discloses the following solution:

[0006] A comprehensive downhole water purification device includes a coarse filtration unit, a fiber filtration unit, a fine filtration unit, an RO reverse osmosis unit, a chemical dosing unit, a control unit, and an equipment frame. The coarse filtration unit, fiber filtration unit, fine filtration unit, RO reverse osmosis unit, chemical dosing unit, and control unit are all integrated and installed within the equipment frame. The inlet of the coarse filtration unit is connected to the raw water pipeline. The coarse filtration unit is equipped with a first coarse filtration branch pipe and a second coarse filtration branch pipe. The first coarse filtration branch pipe is connected to the coarse filtration outlet, and the second coarse filtration branch pipe is connected to the fiber filtration unit inlet. The fiber filtration unit outlet pipeline is equipped with a first... The system includes a first fiber filter branch pipe, a second fiber filter branch pipe, and a third fiber filter branch pipe. The first fiber filter branch pipe is connected to the fiber filter outlet. The second fiber filter branch pipe is connected to the fiber filter unit drain outlet. The third fiber filter branch pipe is connected to the fine filter unit inlet. The fine filter unit outlet is connected to the RO reverse osmosis unit inlet. The RO reverse osmosis unit is divided into a concentrate discharge pipeline and a pure water discharge pipeline. The concentrate is discharged directly through the concentrate discharge pipeline, and the pure water is transported to the point of use through the pure water pipeline. The dosing port of the dosing unit is located on the fine filter unit inlet pipeline. The control unit is used for the automated operation control of the water purification device.

[0007] Furthermore, the coarse filtration unit includes a pressure reducing valve and a self-cleaning coarse filter. A total inlet pressure gauge is installed before the inlet of the pressure reducing valve. An inlet pressure gauge is installed and fixed on the inlet pipe of the self-cleaning coarse filter. The first coarse filter branch pipe and the second coarse filter branch pipe are both connected to the self-cleaning coarse filter. The second coarse filter branch pipe serves as the outlet pipe and is equipped with a fiber filter inlet pressure gauge. A manual butterfly valve is installed at the end of the first coarse filter branch pipe.

[0008] Furthermore, the fiber filtration unit includes an integrated multi-way valve and a fiber filter that are interconnected. The second coarse filter branch pipe is connected to the integrated multi-way valve. The first, second, and third fiber filter branch pipes are all installed on the fiber filter. The first fiber filter branch pipe is the outlet pipe of the fiber filter, which uses the water filtered by the fiber filter as the equipment water and is connected to the water-using equipment through the outlet. The second fiber filter branch pipe is the drain pipe of the fiber filter, which is used to discharge the cleaning water of the fiber filter. The third fiber filter branch pipe is the product water pipe of the fiber filter and is connected to the inlet of the fine filtration unit.

[0009] Furthermore, the fine filtration unit includes an electric valve, a precision filter, and a security filter connected in sequence. The electric valve is connected to the water production pipe of the fiber filter. A precision filter inlet pressure gauge is installed and fixed on the precision filter inlet pipe, and a security filter inlet pressure gauge is installed and fixed on the pipe between the precision filter and the security filter.

[0010] Furthermore, the RO reverse osmosis unit includes an RO inlet pipe, an RO reverse osmosis membrane module, an RO concentrate pipe, and an RO pure water pipe. The RO inlet pipe is located at the inlet of the RO reverse osmosis membrane module and is connected to a security filter. The RO concentrate pipe and the RO pure water pipe are respectively located at the two outlets of the RO reverse osmosis membrane module. The pure water produced by the RO reverse osmosis membrane module is transported to the point of use through the outlet of the RO pure water pipe. The concentrate produced by the RO reverse osmosis membrane module is discharged through the RO concentrate pipe and the concentrate discharge port. An RO inlet pressure gauge and an RO inlet pressure sensor are installed on the RO inlet pipe. A shut-off valve and an electric drain valve are installed in parallel at the front end of the RO concentrate pipe. A concentrate pressure gauge and a concentrate flow meter are installed sequentially at the rear end of the RO concentrate pipe. A pure water flow meter and a manual ball valve are installed sequentially on the RO pure water pipe.

[0011] Furthermore, the dosing unit includes a scale inhibitor solution tank, a glass level gauge, a pneumatic metering pump, an air inlet pipe, an electric valve, and an injection valve. The glass level gauge is installed and fixed on the outside of the scale inhibitor solution tank. The pneumatic metering pump is connected to the scale inhibitor solution tank through a pipe. An electric valve is installed and fixed on the air inlet pipe and connected to the pneumatic metering pump. The injection valve is installed and fixed on the inlet pipe of the precision filter and connected to the outlet of the pneumatic metering pump.

[0012] Furthermore, the control unit is a PLC control box.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The integrated underground water supply and purification device of this utility model can realize graded water supply. It can supply primary coarse water, secondary fine water and tertiary pure water according to the different water quality requirements of the water-using equipment, so as to meet the different water needs of underground equipment and improve the economic efficiency of water supply. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 This is a water supply process diagram of this utility model.

[0017] In the picture,

[0018] 1-Coarse filtration unit; 11-Pressure reducing valve; 12-Self-cleaning coarse filter; 13-Outlet water pipe; 14-Main inlet water pressure gauge; 15-Inlet water pressure gauge; 16-Fiber filter inlet water pressure gauge;

[0019] 2-Fiber filtration unit; 21-Integrated multi-way valve; 22-Fiber filter; 23-Fiber filter product water pipe; 24-Fiber filter drain pipe; 25-Fiber filter outlet water pipe;

[0020] 3-Fine filtration unit; 31-Electric valve; 32-Precision filter; 33-Security filter; 34-Precision filter inlet pressure gauge; 35-Security filter inlet pressure gauge;

[0021] 4-RO reverse osmosis unit; 41-RO reverse osmosis membrane module; 42-RO inlet water pipeline; 43-RO concentrate pipeline; 44-RO pure water pipeline; 45-RO inlet water pressure gauge; 46-RO inlet water pressure sensor; 47-Concentrate pressure gauge; 48-Stop valve; 49-Electric drain valve; 410-Concentrate flow meter; 411-Pure water flow meter; 412-Manual ball valve;

[0022] 5-Dosing unit; 51-Scale inhibitor solution tank; 53-Pneumatic metering pump; 54-Air inlet pipe; 55-Electric valve;

[0023] 6-Control unit;

[0024] 7-Equipment frame. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] like Figure 1-2 As shown in the figure, this embodiment discloses an integrated downhole water purification device, including a coarse filtration unit 1, a fiber filtration unit 2, a fine filtration unit 3, an RO reverse osmosis unit 4, a chemical dosing unit 5, a control unit 6, and an equipment frame 7. The coarse filtration unit 1, the fiber filtration unit 2, the fine filtration unit 3, the RO reverse osmosis unit 4, the chemical dosing unit 5, and the control unit 6 are all integrated and fixed in the equipment frame 7.

[0028] In this embodiment, the inlet of the coarse filtration unit 1 is connected to the raw water pipeline. The outlet pipeline of the coarse filtration unit 1 has two coarse filtration branch pipes. The first coarse filtration branch pipe is connected to the coarse filtration outlet, and the second coarse filtration branch pipe 13 is connected to the inlet of the fiber filtration unit 2. The outlet pipeline of the fiber filtration unit 2 has three branch pipes. The first fiber filtration branch pipe is connected to the fiber filtration outlet, the second fiber filtration branch pipe is connected to the drain outlet of the fiber filtration unit 2, and the third fiber filtration branch pipe is connected to the inlet of the fine filtration unit 3.

[0029] The outlet of the fine filtration unit 3 is connected to the inlet of the RO reverse osmosis unit 4. The RO reverse osmosis unit 4 is divided into a concentrated water discharge pipeline and a pure water discharge pipeline. The concentrated water is discharged directly through the concentrated water discharge pipeline, and the pure water is transported to the point of use through the pure water pipeline.

[0030] The dosing port of the dosing unit 5 is located on the inlet pipe of the fine filtration unit 3. The control unit 6 is used to control various electric valves, monitor various instrument parameters, and perform automated operation control of the equipment. In this embodiment, the control unit 6 includes a PLC control box, pressure sensor, pH sensor, conductivity sensor, flow sensor, electric valves, and control cables. The PLC has a complete control program that receives signals from various sensors, analyzes and processes them, and outputs control signals to control the operation of various electric valves and water pumps, ensuring stable operation of the equipment in automatic control mode.

[0031] Specifically, the coarse filtration unit 1 includes a pressure reducing valve 11 and a self-cleaning coarse filter 12. A main inlet pressure gauge 14 is installed and fixed before the inlet of the pressure reducing valve 11, and an inlet pressure gauge 15 is installed and fixed on the inlet pipe of the self-cleaning coarse filter 12. The first coarse filter branch pipe and the second coarse filter branch pipe 13 are both connected to the self-cleaning coarse filter 12. A fiber filter inlet pressure gauge 16 is installed on the outlet pipe of the second coarse filter branch pipe 13, and a manual butterfly valve is installed at the end of the first coarse filter branch pipe. Raw water is connected to the inlet flange of the pressure reducing valve 11, thereby entering the filtration device.

[0032] The main inlet pressure gauge 14 can detect the water pressure of the raw water. After being reduced to the normal operating pressure by the pressure reducing valve 11, the raw water enters the self-cleaning coarse filter 12 for coarse filtration. The inlet pressure of the self-cleaning coarse filter 12 is determined by observing the inlet pressure gauge 15. The self-cleaning coarse filter 12 mainly consists of a stainless steel shell, a stainless steel wedge filter screen, a backwashing drive mechanism, and a drain pipe. The stainless steel wedge filter screen has a filtration accuracy of 100-200um, which can filter out large particulate impurities in the water. By comparing the values ​​of the inlet pressure gauge 15 and the inlet pressure gauge of the fiber filter 16, when the difference reaches a certain value, the backwashing drive mechanism drives the internal cleaning scraper of the self-cleaning coarse filter 12 to remove contaminants from the stainless steel filter screen. At the same time, the drain port is opened, and the contaminants are discharged with the water flow. The primary water quality after filtration by the self-cleaning coarse filter 12 enters the fiber filter unit 2 through the second coarse filter branch pipe 13. At the same time, the first coarse filter branch pipe is connected to the outlet, which is used as the production water and water supply pipeline.

[0033] The fiber filtration unit 2 includes an integrated multi-way valve 21, a fiber filter 22, and pipelines that are interconnected. The second coarse filter branch pipe 13 is connected to the integrated multi-way valve 21. The first, second, and third fiber filter branch pipes are all installed on the fiber filter 22. The first fiber filter branch pipe is the fiber filter outlet pipe 25, which uses the water filtered by the fiber filter 22 as the equipment water and is connected to the water-using equipment through the outlet. The second fiber filter branch pipe is the fiber filter drain pipe 24, which is used to discharge the cleaning water of the fiber filter 22. The third fiber filter branch pipe is the fiber filter product water pipe 23, which is connected to the inlet of the fine filtration unit 3.

[0034] After being filtered by the coarse filtration unit 1, the water first enters the integrated multi-way valve 21. The integrated multi-way valve 21 is connected to the inlet and outlet of the fiber filter 22 through pipelines. By adjusting the different positions of the integrated multi-way valve 21, the fiber filter 22 can enter four working modes: filtration, backwashing, forward washing, and hydraulic motor backwashing. In normal filtration, water enters the fiber filter through the integrated multi-way valve 21 from the top pipe, re-enters the integrated multi-way valve 21 from the bottom pipe, and then flows to the fine filtration unit 3. In backwashing, water enters the fiber filter through the integrated multi-way valve 21 from the bottom pipe, re-enters the integrated multi-way valve 21 from the top pipe, and then enters the fiber filter drain pipe 24, from which wastewater is discharged. In forward washing, water enters the fiber filter through the integrated multi-way valve 21 from the top pipe, re-enters the integrated multi-way valve 21 from the bottom pipe, and then enters the fiber filter drain pipe 24, from which wastewater is discharged. In hydraulic motor backwashing, the fiber granular filter media combines the advantages of high filtration accuracy and large dirt-holding capacity of fiber filter media with the advantages of high backwash cleaning efficiency and low water consumption of granular filter media. The porosity distribution of the filter bed formed by this filter media is close to the structure of an ideal filter media. The filter bed exhibits a uniform porosity distribution across its horizontal cross-section, ensuring consistent water flow channel size during filtration. This directly results in uniform contaminant removal and avoids short-circuiting of the water flow. In its vertical longitudinal cross-section, the diameter of the pore channels gradually decreases from top to bottom, exhibiting a gradient distribution with larger diameters at the top and smaller diameters at the bottom. This structure is highly conducive to the effective separation of suspended solids in the water; particles desorbed in the upper part of the filter bed are easily captured and retained in the narrower channels at the bottom. Therefore, it enables high-speed and high-precision filtration to meet the requirements of high water quality and large water volume applications.

[0035] During filtration, the pressure difference of the water flow compacts the fiber bundles. During backwashing, due to the difference in specific gravity between the fiber particles and the fiber bundles, the fiber bundles disperse and oscillate with the backwash water flow, generating a strong swaying force. The mutual collision between the filter media also intensifies the forces acting on the fibers in the water. The irregular shape of the filter media causes it to rotate under the action of the backwash water flow, further enhancing the forces acting on the filter media during backwashing. The combined effect of these forces makes it easy for dirt particles attached to the fiber surface to detach, thereby improving the backwashing cleanliness of the filter media.

[0036] The fine filtration unit 3 includes an electric valve 31, a precision filter 32, and a security filter 33, which are connected in sequence through pipelines. The electric valve 31 is connected to the fiber filter's water production pipe 23. A precision filter inlet pressure gauge 34 is installed and fixed on the precision filter 32 inlet pipeline, and a security filter inlet pressure gauge 35 is installed and fixed on the pipeline between the precision filter 32 and the security filter 33.

[0037] The water filtered by the fiber filter unit 2 first enters the precision filter 32 through the electric valve 31 for further filtration. The filtered water then enters the security filter 33 through the pipeline for further filtration. The filtered water meets the requirements for RO reverse osmosis feed water.

[0038] The internal filter elements of precision filter 32 and security filter 33 are high-quality PP filter elements. The filtration accuracy of the PP filter element in precision filter 32 is 10μm, and the filtration accuracy of the PP filter element in security filter 33 is 5μm, which can effectively remove suspended solids, particles, rust and other impurities from liquids.

[0039] Both the precision filter 32 and the security filter 33 have pressure gauges and corresponding pressure sensors at their inlets, allowing operators to easily understand the water pressure at that location.

[0040] The reverse osmosis unit 4 includes an RO inlet pipe 42, an RO reverse osmosis membrane module 41, an RO concentrate pipe 43, and an RO pure water pipe 44. The RO inlet pipe 42 is located at the inlet of the RO reverse osmosis membrane module 41 and is connected to the security filter 33. The RO concentrate pipe 43 and the RO pure water pipe 44 are respectively located at the two outlets of the RO reverse osmosis membrane module 41. The pure water produced by the RO reverse osmosis membrane module 41 is transported to the point of use through the outlet of the RO pure water pipe 44. The concentrate produced by the RO reverse osmosis membrane module 41 is discharged through the RO concentrate pipe 43 and the concentrate discharge port. An RO inlet pressure gauge 45 and an RO inlet pressure sensor 46 are installed and fixed on the RO inlet pipe 42. A concentrate pressure gauge 47, a shut-off valve 48, an electric drain valve 49, and a concentrate flow meter 410 are installed on the RO concentrate pipe 43. A pure water flow meter 411 is installed and fixed on the RO pure water pipe 44.

[0041] The shut-off valve 48 is used to regulate the concentrate pressure of the RO reverse osmosis membrane module 41. The electric drain valve 49 is connected in parallel with the shut-off valve 48 to the RO concentrate pipeline 43. When the RO reverse osmosis membrane module 41 needs to be flushed, the electric drain valve 49 is opened and the sewage is discharged through the electric drain valve 49 and the RO concentrate pipeline 43.

[0042] The RO inlet pressure gauge 45 and concentrate pressure gauge 47 allow operators to directly observe the inlet pressure of the RO reverse osmosis membrane module 41. The concentrate flow meter 410 and pure water flow meter 411 allow operators to directly observe the real-time output flow of concentrate and pure water from the RO reverse osmosis membrane module 41.

[0043] The dosing unit 5 includes a scale inhibitor solution tank 51, a glass level gauge, a pneumatic metering pump 53, an air inlet pipe 54, an electric valve 55, and an injection valve. The glass level gauge is installed and fixed on the outside of the scale inhibitor solution tank 51. The pneumatic metering pump 53 is connected to the scale inhibitor solution tank 51 through a pipe. The electric valve 55 is installed and fixed on the air inlet pipe 54 and connected to the pneumatic metering pump 53. The injection valve is installed and fixed on the inlet pipe of the precision filter 32 and connected to the outlet of the pneumatic metering pump 53.

[0044] The scale inhibitor solution tank 51 contains reverse osmosis scale inhibitor. When the electric valve 55 is opened, pressurized gas enters the pneumatic metering pump 53 through the air inlet pipe 54 and enables it to perform normal dosing. The dosing amount can be controlled by adjusting the knob on the pneumatic metering pump 53.

[0045] During normal operation, each pressure sensor and flow sensor transmits data to the control unit 6. The PLC controller inside the control unit 6 analyzes the data. When an abnormal pressure is detected, an audible and visual alarm is triggered. When the continuous running time reaches the limit, an instruction is given to flush.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A downhole integrated water supply and purification apparatus, characterized in that, The utility model provides a water purification device, including rough filter unit (1), fiber filter unit (2), fine filter unit (3), RO reverse osmosis unit (4), dosing unit (5), control unit (6), equipment frame (7), rough filter unit (1), fiber filter unit (2), fine filter unit (3), RO reverse osmosis unit (4), dosing unit (5), control unit (6) are all integrated installation in equipment frame (7), the water inlet of rough filter unit (1) is connected with raw water pipeline, rough filter unit (1) is provided with first rough filter branch pipe and second rough filter branch pipe (13), first rough filter branch pipe connects rough filter water outlet, second rough filter branch pipe (13) is connected with the water inlet of fiber filter unit (2), fiber filter unit (2) water outlet pipeline is provided with first fiber filter branch pipe, second fiber filter branch pipe and third fiber filter branch pipe, first fiber filter branch pipe is connected fiber filter water outlet, second fiber filter branch pipe is connected with fiber filter unit (2) blowdown, third fiber filter branch pipe is connected with fine filter unit (3) water inlet, fine filter unit (3) water outlet is connected with RO reverse osmosis unit (4) water inlet, RO reverse osmosis unit (4) is divided into concentrated water discharge pipeline and pure water discharge pipeline, concentrated water is directly discharged through concentrated water discharge pipeline, pure water is delivered to water consumption point through pure water pipeline, the dosing mouth of dosing unit (5) is set on fine filter unit (3) water inlet pipeline, control unit (6) is used for the automatic operation control of water purification device.

2. The downhole integrated water supply and purification device according to claim 1, characterized in that, The rough filter unit (1) includes a pressure reducing valve (11) and a self-cleaning rough filter (12), a total water inlet pressure gauge (14) is installed before the inlet of the pressure reducing valve (11), a water inlet pressure gauge (15) is fixedly installed on the water inlet pipeline of the self-cleaning rough filter (12), the first rough filter branch pipe and the second rough filter branch pipe (13) are both communicated with the self-cleaning rough filter (12), the second rough filter branch pipe (13) is provided with a fiber filter water inlet pressure gauge (16) as a water outlet pipeline, and a manual butterfly valve is installed at the end of the first rough filter branch pipe.

3. The downhole integrated water supply and purification apparatus according to claim 2, wherein, The fiber filter unit (2) includes an integrated multi-way valve (21) and a fiber filter (22) which are communicated with each other, the second rough filter branch pipe (13) is communicated with the integrated multi-way valve (21), the first fiber filter branch pipe, the second fiber filter branch pipe and the third fiber filter branch pipe are all arranged on the fiber filter (22), the first fiber filter branch pipe is a fiber filter water outlet pipe (25), the water filtered by the fiber filter (22) is used as equipment water, and the water outlet pipe is connected with a water equipment, the second fiber filter branch pipe is a fiber filter blowdown pipe (24) for discharging the cleaning water of the fiber filter (22), and the third fiber filter branch pipe is a fiber filter water production pipe (23) connected with the water inlet of the fine filter unit (3).

4. The downhole integrated water supply and purification apparatus according to claim 3, characterized in that, The fine filtering unit (3) comprises an electric valve (31), a precision filter (32) and a security filter (33) in sequence, the electric valve (31) is communicated with the fiber filter water production pipe (23), the precision filter (32) is fixed with a precision filter water inlet pressure gauge (34) on the water inlet pipeline, and the security filter water inlet pressure gauge (35) is fixed on the pipeline between the precision filter (32) and the security filter (33).

5. The downhole integrated water supply and purification apparatus according to claim 4, wherein, The RO reverse osmosis unit (4) comprises an RO water inlet pipeline (42), an RO reverse osmosis membrane assembly (41), an RO concentrated water pipeline (43) and an RO pure water pipeline (44), the RO water inlet pipeline (42) is arranged at the water inlet of the RO reverse osmosis membrane assembly (41) and communicated with the security filter (33), the RO concentrated water pipeline (43) and the RO pure water pipeline (44) are arranged at two water outlets of the RO reverse osmosis membrane assembly (41) respectively, the pure water produced by the RO reverse osmosis membrane assembly (41) is delivered to a water use point through the RO pure water pipeline (44) water outlet, the concentrated water produced by the RO reverse osmosis membrane assembly (41) is discharged through the RO concentrated water pipeline (43) and a concentrated water discharge port, the RO water inlet pipeline (42) is provided with an RO water inlet pressure gauge (45) and an RO water inlet pressure sensor (46), the front end of the RO concentrated water pipeline (43) is provided with a stop valve (48) and an electric blowdown valve (49) in parallel, and the rear end of the RO concentrated water pipeline (43) is provided with a concentrated water pressure gauge (47) and a concentrated water flowmeter (410) in sequence, and the RO pure water pipeline (44) is provided with a pure water flowmeter (411) and a manual ball valve in sequence.

6. The downhole integrated water supply and purification apparatus according to claim 4, wherein, The dosing unit (5) comprises a scale inhibitor solution tank (51), a glass liquid level meter, a pneumatic metering pump (53), an air inlet pipeline (54), an electric valve (55) and an injection valve, the glass liquid level meter is fixed outside the scale inhibitor solution tank (51), the pneumatic metering pump (53) is connected with the scale inhibitor solution tank (51) through a pipeline, the electric valve (55) is fixed on the air inlet pipeline (54) and connected with the pneumatic metering pump (53), and the injection valve is fixed on the water inlet pipeline of the precision filter (32) and connected with the outlet of the pneumatic metering pump (53).

7. The downhole integrated water supply and purification apparatus according to claim 1, wherein, The control unit (6) is a PLC control box.

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