Underground water pollution remediation device capable of preventing blockage

Abstract

The invention discloses an underground water pollution remediation device capable of preventing blockage, and relates to the technical field of underground water pollution remediation, and the underground water pollution remediation device comprises a super-hydrophilic selective passing membrane assembly which is vertically arranged in an underground water flow channel and is used for intercepting organic pollutants in underground water; the precipitation well is formed in a lower rock stratum, a well mouth of the precipitation well is communicated with the underground water flow channel and is close to the front end of the super-hydrophilic selective passing membrane assembly, and the organic pollutants can settle into the precipitation well after being intercepted; one end of the extraction and purification mechanism communicates with the precipitation well, the other end of the extraction and purification mechanism communicates with the water purification mechanism, and the water outlet end of the water purification mechanism communicates with the underground water flow channel and is located behind the super-hydrophilic selective passing membrane assembly. The super-hydrophilic selective passing membrane component can effectively intercept organic pollutants and allow underground water to pass through, so that an underground water polluted area does not need to be comprehensively closed in the underground water remediation process, a drainage system can normally operate, the underground water can be continuously remedied, and the hydraulic characteristics and the stratum structure of the underground water are prevented from being influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater pollution remediation, and particularly to a groundwater pollution remediation device capable of preventing blockage. Background Art

[0002] There are many types of groundwater pollution, such as oil pollution, organic pollution caused by chemical sewage discharge, pollution caused by domestic waste discharge, and so on. When multiple pollution sources are concentrated in the same groundwater source, the groundwater with combined pollution is extremely prone to problems such as pollutant migration and diffusion as well as groundwater blockage.

[0003] In the prior art, for the groundwater with combined pollution, a barrier and anti-seepage system is usually adopted to completely enclose the groundwater pollution area to prevent pollutant migration and diffusion. However, this treatment method will not only cause the drainage system to collapse, but also affect the hydraulic characteristics of groundwater and the formation structure, and the treatment cycle is generally long; and the complete enclosure is equivalent to a disguised form of groundwater blockage, so the prior art basically cannot solve the problem of groundwater blockage.

[0004] In view of this, for the groundwater with combined pollution, how to provide a groundwater remediation device that can avoid blockage, is efficient and does not affect the drainage system is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a groundwater pollution remediation device capable of preventing blockage to solve the problems existing in the prior art.

[0006] To achieve the above purpose, the present invention provides a groundwater pollution remediation device capable of preventing blockage. The groundwater flow channel is located on the upper surface of the lower rock stratum, and the upper rock stratum is above the groundwater flow channel. The device includes:

[0007] A superhydrophilic selective permeation membrane module, which is vertically arranged in the groundwater flow channel and can cover the longitudinal section of the groundwater flow channel. Its upper end is embedded in the upper rock stratum, and its lower end is embedded in the lower rock stratum. The superhydrophilic selective permeation membrane module is used to intercept organic pollutants in the groundwater;

[0008] A sedimentation well is opened in the lower rock stratum. The wellhead of the sedimentation well is communicated with the groundwater flow channel and is close to the front end of the superhydrophilic selective permeation membrane module. After the organic pollutants are intercepted, they can settle into the sedimentation well;

[0009] An extraction and purification mechanism, one end of which is communicated with the sedimentation well, and the other end is communicated with a water purification mechanism. The water outlet end of the water purification mechanism is communicated with the groundwater flow channel and is located behind the superhydrophilic selective permeation membrane module.

[0010] Further, the superhydrophilic selective permeable membrane module includes, successively arranged: an activated carbon filtration layer, a superhydrophilic selective permeable membrane, and a geotextile layer; water-blocking connectors are provided at both the upper and lower ends of the activated carbon filtration layer, the superhydrophilic selective permeable membrane, and the geotextile layer, and the two water-blocking connectors are respectively embedded in the upper rock stratum and the lower rock stratum.

[0011] Further, the groundwater flow channel expands towards both sides centered on the sedimentation well to form two arc-shaped expansion parts. An organic pollutant interception area is defined between the two arc-shaped expansion parts. The organic pollutant interception area divides the groundwater flow channel into a first flow channel and a second flow channel. The first flow channel, the organic pollutant interception area, and the second flow channel are connected in sequence; the superhydrophilic selective permeable membrane module is in a V shape, with the tip of its middle part arranged near the entrance of the second flow channel, and both ends extend towards the two arc-shaped expansion parts until they are connected to the arc-shaped expansion parts. The sedimentation well is located between the outlet of the first flow channel and the superhydrophilic selective permeable membrane module.

[0012] Further, it further includes:

[0013] A grille, arranged at the outlet of the first flow channel, for intercepting domestic garbage in the groundwater;

[0014] A sedimentation tank, opened in the lower rock stratum. The mouth of the sedimentation tank is communicated with the first flow channel and is close to the front end of the grille. A movable collection cylinder is placed in the sedimentation tank for collecting the intercepted domestic garbage. The top of the movable collection cylinder is provided with an upper opening adapted to the mouth of the sedimentation tank, and a connecting ear is arranged near the upper opening of the collection cylinder;

[0015] A first vertical shaft, longitudinally penetrating through the upper rock stratum, corresponding to the position of the sedimentation tank.

[0016] Further, the extraction and purification mechanism includes:

[0017] A sewage pipe. A second vertical shaft is longitudinally penetrating through the upper rock stratum, corresponding to the position of the sedimentation well. One end of the sewage pipe extends into the sedimentation well from the second vertical shaft and is close to the bottom of the sedimentation well. The other end of the sewage pipe is led out from the top of the second vertical shaft and is communicated with the water purification mechanism;

[0018] A sewage pump, arranged on the sewage pipe.

[0019] Further, it further includes:

[0020] A closing mechanism is arranged in the upper rock stratum. The closing mechanism can move between a first position and a second position in the vertical direction. When the closing mechanism moves to the first position, one end of the closing mechanism communicates with the bottom of the second vertical shaft, and the other end communicates with the sedimentation well; when the closing mechanism moves to the second position, the closing mechanism moves into the upper rock stratum.

[0021] A water tank is communicated with the top of the second vertical shaft through a water inlet pipe. The diameter of the sewage pipe is smaller than the inner diameter of the second vertical shaft and the inner diameter of the sedimentation well. The other end of the sewage pipe penetrates through the water inlet pipe in a sealed manner and is communicated with the water purification mechanism.

[0022] A high-pressure water pump is arranged on the water inlet pipe.

[0023] Furthermore, the water tank is communicated with the underground water flow channel through a first water inlet pipe, and the connection point is behind the super-hydrophilic selective permeation membrane module, and is communicated with the water outlet end of the water purification mechanism through a second water inlet pipe.

[0024] Furthermore, the closing mechanism includes:

[0025] An inner cylinder body. An installation chamber is defined between the outer side of the second vertical shaft and the upper rock stratum, and the inner cylinder body is sleeved on the outer side surface of the second vertical shaft.

[0026] An outer cylinder body, which is concentric with the inner cylinder body and is fixed to the upper rock stratum.

[0027] A cylindrical sliding member. A sliding chamber is defined between the outer cylinder body and the inner cylinder body. The cylindrical sliding member is adapted to the shape of the sliding chamber, and is arranged in the sliding chamber and is slidably connected with the inner cylinder body and the outer cylinder body in the vertical direction.

[0028] A cylinder is arranged in the installation chamber and is fixed to the outer side surface of the upper rock stratum and / or the second vertical shaft. The output end of the cylinder extends downward and is connected with the cylindrical sliding member.

[0029] A connection groove is opened on the bottom surface of the underground water flow channel. The cylinder can drive the cylindrical sliding member to slide between the first position and the second position. When the cylindrical sliding member is in the first position, the bottom of the cylindrical sliding member is inserted into the connection groove, and the second vertical shaft and the sedimentation well are communicated; when the cylindrical sliding member is in the second position, the cylindrical sliding member is located in the sliding chamber.

[0030] Furthermore, a sealing ring is arranged at the bottom of the cylindrical sliding member.

[0031] Furthermore, the water outlet end of the water purification mechanism is close to the rear end of the super-hydrophilic selective permeation membrane module and is inclined towards the direction where the super-hydrophilic selective permeation membrane module is located.

[0032] The present invention discloses the following technical effects:

[0033] 1. The superhydrophilic selective permeable membrane module can effectively intercept organic pollutants and allow groundwater to pass through. Therefore, during the groundwater remediation process, it is not necessary to fully enclose the groundwater pollution area, and the drainage system can operate normally, continuously remediating groundwater and avoiding affecting the hydraulic characteristics of groundwater and the formation structure.

[0034] 2. In the groundwater flow channel, two arc-shaped expansion parts are formed by expanding on both sides centered on the sedimentation well. An organic pollutant interception area is defined between the two arc-shaped expansion parts. The organic pollutant interception area can expand the longitudinal cross-sectional area of the groundwater flow channel and forcefully change the flow direction of groundwater; the expansion of the longitudinal and cross-sectional area is conducive to reducing the flow velocity of groundwater and improving the interception effect of organic pollutants. The arc-shaped expansion parts can allow groundwater to flow to both sides. Combined with the V-shaped arrangement of the superhydrophilic selective permeable membrane module, it can make the groundwater flowing to both sides impact the outer surface of the superhydrophilic selective permeable membrane module at a smaller flow angle (the angle between the flow direction and the outer surface of the superhydrophilic selective permeable membrane module). When small particle impurities are blocked, they can be washed away by groundwater, achieving the effect of side flushing and avoiding blockage of the superhydrophilic selective permeable membrane module.

[0035] 3. A grille is provided at the outlet of the first flow channel. The grille can intercept domestic waste in groundwater and collect it using a sedimentation tank and a movable collection barrel. A first vertical shaft is provided in the upper rock formation corresponding to the sedimentation tank. The movable collection barrel can be moved to the ground surface using a rope and a sprocket structure, and the collected domestic waste can be regularly cleaned to avoid blockage of the groundwater flow channel.

[0036] 4. After the organic pollutants are intercepted, they naturally settle into the sedimentation well. They can be pumped into the water purification mechanism through a sewage pipe and a sewage pump. After purification, the purified water is re-discharged into the groundwater flow channel, which can efficiently repair the organic pollution of groundwater. In addition, the water outlet end of the water purification mechanism is close to the rear end of the superhydrophilic selective permeable membrane module and is inclined towards the direction where the superhydrophilic selective permeable membrane module is located, which can generate a purified water flow opposite to the groundwater flow direction, and can backwash the superhydrophilic selective permeable membrane module to further avoid blockage of the superhydrophilic selective permeable membrane module.

[0037] 5. The present invention is provided with a sealing mechanism that can seal and connect the sedimentation well located in the lower rock formation with the second vertical shaft located in the upper rock formation. Using the above structure, high-pressure water is introduced into the sedimentation well from the ground, thereby completely replacing the polluted water in the sedimentation well, being able to break through the limitations of the sewage pump and carry out the remediation work on deeper groundwater, and having a wider application range compared with the prior art. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 Structural schematic diagram of the present invention;

[0040] Figure 2 Top view of the underground water flow channel;

[0041] Figure 3 Structural schematic diagram of the superhydrophilic selective permeation membrane module;

[0042] Figure 4 Schematic diagram of the closing mechanism;

[0043] Figure 5 Schematic diagram of the first shaft;

[0044] Figure 6 Schematic diagram of the cooperation between the cylindrical sliding member and the connecting groove;

[0045] Figure 7 Schematic diagram of the sprocket mechanism pulling the movable collection cylinder through a pulling rope;

[0046] Among them, 1. Underground water flow channel; 101. First flow channel; 102. Second flow channel; 103. Arc-shaped expansion part; 104. Organic pollutant interception area; 2. Lower rock layer; 3. Upper rock layer; 4. Superhydrophilic selective permeation membrane module; 401. Activated carbon filter layer; 402. Superhydrophilic selective permeation membrane; 403. Geotextile layer; 5. Sedimentation well; 6. Water purification mechanism; 7. Grid; 8. Sedimentation tank; 9. Movable collection cylinder; 10. First shaft; 1001. Ladder; 1002. Manhole cover; 11. Sewage pipe; 12. Second shaft; 13. Sewage pump; 14. Closing mechanism; 1401. Inner cylinder; 1402. Outer cylinder; 1403. Cylindrical sliding member; 1404. Cylinder; 1405. Connecting groove; 15. Water tank; 16. High-pressure water pump; 17. Sprocket mechanism; 18. Pulling rope. Detailed implementation manners

[0047] All of the above prior arts adopt a barrier and anti-seepage system to comprehensively seal the groundwater pollution area to prevent the migration and diffusion of pollutants, and fail to solve the technical problems described in the background art.

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] As Figures 1-7 shown, the embodiment of the present invention provides a groundwater pollution remediation device that can prevent blockage. The groundwater flow channel 1 is located on the upper surface of the lower rock layer 2, and the upper rock layer 3 is above the groundwater flow channel 1. (Only schematic diagrams of the upper rock layer 3 and the lower rock layer 2 are shown in the drawings, and they do not limit the thickness of the upper rock layer 3 and the lower rock layer 2). It includes:

[0051] A super-hydrophilic selective permeation membrane module 4, which is vertically arranged in the groundwater flow channel 1 and can cover the longitudinal section of the groundwater flow channel 1. Its upper end is embedded in the upper rock layer 3, and its lower end is embedded in the lower rock layer 2. The super-hydrophilic selective permeation membrane module 4 is used to intercept organic pollutants in groundwater;

[0052] A sedimentation well 5 is opened in the lower rock layer 2. The wellhead of the sedimentation well 5 is communicated with the groundwater flow channel 1 and is close to the front end of the super-hydrophilic selective permeation membrane module 4. After the organic pollutants are intercepted, they can settle into the sedimentation well 5;

[0053] An extraction and purification mechanism, one end of which is communicated with the sedimentation well 5, and the other end is communicated with the water purification mechanism 6. The water outlet end of the water purification mechanism 6 is communicated with the groundwater flow channel 1 and is located behind the super-hydrophilic selective permeation membrane module 4.

[0054] In this embodiment, the super-hydrophilic selective permeation membrane module 4 includes, in sequence: an activated carbon filter layer 401, a super-hydrophilic selective permeation membrane 402, and a geotextile layer 403; water-blocking connectors are provided at the upper and lower ends of the activated carbon filter layer 401, the super-hydrophilic selective permeation membrane 402, and the geotextile layer 403, and the two water-blocking connectors are respectively embedded in the upper rock layer 3 and the lower rock layer 2. The activated carbon filter layer 401 is composed of a non-woven fabric layer and activated carbon particles tightly filled inside the non-woven fabric layer. In some other embodiments, the activated carbon filter layer 401 can also be replaced with a material layer such as a gravel layer that is waterproof and can intercept organic pollutants.

[0055] The superhydrophilic selective permeable membrane 402 is a membrane material with a surface contact angle less than 10°. It can enable water to spread rapidly on its surface and pass through preferentially, while having the ability to selectively separate other substances such as oil and organic compounds. In this embodiment, the selective separation ability of the superhydrophilic selective permeable membrane 402 for organic pollutants is utilized to intercept the organic pollutants in groundwater at the front end.

[0056] In this embodiment, the groundwater flow channel 1 expands towards both sides centered on the sedimentation well 5 to form two arc-shaped expansion parts 103. An approximately circular organic pollutant interception area 104 is defined between the two arc-shaped expansion parts 103. The organic pollutant interception area 104 divides the groundwater flow channel 1 into a first flow channel 101 and a second flow channel 102. The first flow channel 101, the organic pollutant interception area 104, and the second flow channel 102 are connected in sequence. The groundwater flow direction is from the first flow channel 101 towards the second flow channel 102; the superhydrophilic selective permeable membrane module 4 is in a V shape, with its middle tip arranged near the entrance of the second flow channel 102, and both ends extend towards the two arc-shaped expansion parts 103 until they are connected to the arc-shaped expansion parts 103. The sedimentation well 5 is located between the outlet of the first flow channel 101 and the superhydrophilic selective permeable membrane module 4.

[0057] When the groundwater flows through the organic pollutant interception area 104, the groundwater near the edge flows towards both sides. When the groundwater flows to the widest position of the organic pollutant interception area 104, it starts to flow from both sides towards the inside. The setting of the superhydrophilic selective permeable membrane module 4 can be as close as possible to the inner side of the arc-shaped expansion part 103, so that the groundwater impacts the superhydrophilic selective permeable membrane module 4 at a smaller flow angle.

[0058] In this embodiment, it further includes:

[0059] A grille 7, arranged at the outlet of the first flow channel 101, is used to intercept domestic waste in groundwater and can also intercept large-size and large-particle impurities such as branches.

[0060] A sedimentation tank 8 is opened in the lower rock layer 2. The mouth of the sedimentation tank 8 is connected to the first flow channel 101 and is close to the front end of the grille 7. A movable collection cylinder 9 is placed in the sedimentation tank 8 for collecting the intercepted domestic waste. The movable collection cylinder 9 is made of waterproof, corrosion-resistant, and wear-resistant materials. Its top is provided with an upper opening adapted to the mouth of the sedimentation tank 8, and a connecting ear is arranged near the upper opening of the collection cylinder.

[0061] A first vertical shaft 10 is longitudinally penetrated and arranged in the upper rock layer 3, and the first vertical shaft 10 corresponds to the position of the sedimentation tank 8.

[0062] In this embodiment, a drawstring 18 is connected to the connecting ear, and a ladder 1001 is provided in the first vertical shaft 10. One end of the drawstring 18 can always maintain the connection state with the connecting ear, and the other end of the drawstring 18 can be wound around the ladder 1001. The length of the drawstring 18 is sufficient to facilitate the operator to take out the drawstring 18 from the first vertical shaft 10. A manhole cover 1002 is provided at the top of the first vertical shaft 10. The manhole cover 1002 can be removed and a sprocket mechanism 17 is provided at the wellhead. Connecting the other end of the drawstring 18 to the sprocket mechanism 17 can move the movable collection cylinder 9 from the sedimentation tank 8 to the ground, and the domestic waste in the movable collection cylinder 9 can be regularly cleaned. The inner diameter of the first vertical shaft 10 is required to be larger than the outer diameter of the collection cylinder to prevent the movable collection cylinder 9 from getting stuck in the first vertical shaft 10 during the movement process.

[0063] In this embodiment, the extraction and purification mechanism includes:

[0064] A sewage pipe 11. The upper rock stratum 3 is longitudinally penetrated with a second vertical shaft 12. The second vertical shaft 12 corresponds to the position of the sedimentation well 5. One end of the sewage pipe 11 extends into the sedimentation well 5 from the second vertical shaft 12 and is close to the bottom of the sedimentation well 5. The other end of the sewage pipe 11 is led out from the top of the second vertical shaft 12 and communicated with the water purification mechanism 6.

[0065] A sewage pump 13 is provided on the sewage pipe 11. Since the organic pollutants settle in the sedimentation well 5 after being intercepted, relatively more organic pollutants will accumulate at the bottom of the sedimentation well 5. The sewage containing organic pollutants can be pumped from the sedimentation well 5 to the water purification mechanism 6 by the sewage pump 13. After removing the organic pollutants, the purified water (referring to the water reaching the discharge standard, not specifically referring to the drinking standard water) is discharged into the underground water flow channel 1.

[0066] In this embodiment, it further includes:

[0067] A closing mechanism 14 is provided in the upper rock stratum 3. The closing mechanism 14 can move between a first position and a second position in the vertical direction. When the closing mechanism 14 moves to the first position, one end of the closing mechanism 14 is communicated with the bottom of the second vertical shaft 12, and the other end is communicated with the sedimentation well 5. When the closing mechanism 14 moves to the second position, the closing mechanism 14 moves into the upper rock stratum 3.

[0068] A water tank 15 is communicated with the top of the second vertical shaft 12 through a water inlet pipe. The diameter of the sewage pipe 11 is smaller than the inner diameter of the second vertical shaft 12 and the inner diameter of the sedimentation well 5. The other end of the sewage pipe 11 penetrates through the water inlet pipe in a sealed manner and is communicated with the water purification mechanism 6.

[0069] A high-pressure water pump 16 is provided on the water inlet pipe.

[0070] In this embodiment, the water tank 15 is connected to the underground water flow channel 1 through the first water inlet pipe, and the connection point is located behind the super-hydrophilic selective permeation membrane module 4, and is connected to the water outlet end of the water purification mechanism 6 through the second water inlet pipe.

[0071] In this embodiment, the closing mechanism 14 includes:

[0072] An inner cylinder 1401. An installation chamber is defined between the outer side of the second vertical shaft 12 and the upper rock stratum 3, and the inner cylinder 1401 is sleeved on the outer side surface of the second vertical shaft 12;

[0073] An outer cylinder 1402, which is concentrically arranged with the inner cylinder 1401 and fixed to the upper rock stratum 3;

[0074] A cylindrical sliding member 1403. A sliding chamber is defined between the outer cylinder 1402 and the inner cylinder 1401. The cylindrical sliding member 1403 is adapted to the shape of the sliding chamber, and is arranged in the sliding chamber and is slidably connected to the inner cylinder 1401 and the outer cylinder 1402 in the vertical direction;

[0075] A cylinder 1404, which is arranged in the installation chamber and fixed to the outer side surface of the upper rock stratum 3 and / or the second vertical shaft 12. The output end of the cylinder 1404 extends downward and is connected to the cylindrical sliding member 1403;

[0076] A connection groove 1405 is opened on the bottom surface of the underground water flow channel 1. The cylinder 1404 can drive the cylindrical sliding member 1403 to slide between a first position and a second position. When the cylindrical sliding member 1403 is in the first position, the bottom of the cylindrical sliding member 1403 is inserted into the connection groove 1405, and the second vertical shaft 12 and the sedimentation well 5 are communicated; when the cylindrical sliding member 1403 is in the second position, the cylindrical sliding member 1403 is located in the sliding chamber.

[0077] When the cylindrical sliding member 1403 moves to the first position, the bottom of the cylindrical sliding member 1403 is limited by the connection groove 1405. Therefore, when the high-pressure water pump 16 injects water into the second vertical shaft 12, the connection groove 1405, the inner cylinder 1401 and the outer cylinder 1402 can fully support the cylindrical sliding member 1403 to prevent the cylindrical sliding member 1403 from being displaced under the action of high water pressure.

[0078] In this embodiment, a sealing ring is provided at the bottom of the cylindrical sliding member 1403. The sealing ring has two functions. When the cylindrical sliding member 1403 is engaged with the connecting groove 1405, the sealing ring can be deformed by extrusion and fill the gap between the two cylindrical sliding members 1403 and the connecting groove 1405, preventing water from entering the connecting groove 1405 and affecting the connection effect. However, it should be noted that when the cylindrical sliding member 1403 is engaged with the connecting groove 1405, even if groundwater enters the sedimentation well 5, it will not affect the subsequent sewage discharge operation. When the cylindrical sliding member 1403 moves to the second position, the sealing ring can prevent groundwater from entering the sliding chamber and corroding the equipment.

[0079] In this embodiment, the water outlet end of the water purification mechanism 6 is close to the rear end of the superhydrophilic selective permeation membrane module 4 and is inclined towards the direction where the superhydrophilic selective permeation membrane module 4 is located. The purified water can be output through the water outlet end of the water purification mechanism 6 to backwash the rear end of the superhydrophilic selective permeation membrane module 4, further preventing the superhydrophilic selective permeation membrane module 4 from being blocked.

[0080] The overall working process is as follows:

[0081] 1. Groundwater flows along the first flow channel 101. When it reaches the outlet of the first flow channel 101, large-sized and large-particle impurities in the groundwater are intercepted by the grid 7 structure and settle into the movable collection cylinder 9 at the front end of the grid 7.

[0082] The groundwater continues to flow and enters the organic pollutant interception area 104. The groundwater near the outer side of the underground water flow channel 1 moves towards both sides of the organic pollutant interception area 104. When it reaches the widest position of the organic pollutant interception area 104 (i.e., the straight-line position where the sedimentation well 5 is located, which is the maximum outer diameter of the organic pollutant interception area 104), it starts to flow from both sides towards the inside. The groundwater impacts the superhydrophilic selective permeation membrane module 4 at a small flow angle. Small-particle impurities on the surface of the superhydrophilic selective permeation membrane module 4 are washed by the groundwater and fall into the underground water flow channel 1, and finally settle into the sedimentation well 5. The organic pollutants in the groundwater are also intercepted by the superhydrophilic selective permeation membrane module 4. In addition, the V-shaped superhydrophilic selective permeation membrane module 4 is also beneficial for the intercepted organic pollutants to quickly enter the sedimentation well 5 through the reflected flow. The organic pollutants will undergo natural attenuation in the sedimentation well 5, which involves biodegradation, chemical reactions, etc. The specific sedimentation process of the organic pollutants in the sedimentation well 5 belongs to the prior art and will not be elaborated here.

[0083] After the organic pollutants are intercepted, the groundwater passes through the superhydrophilic selective permeation membrane module 4 and continues to flow along the second flow channel 102.

[0084] 2. When it is necessary to extract the sewage in the sedimentation well 5, if the depth of the formation where the underground water flow channel 1 is located is relatively shallow, the sewage pump 13 can be directly opened to extract the sewage in the sedimentation well 5 into the water purification mechanism 6 for treatment. The purified water after treatment is discharged into the underground water flow channel 1 or into the water tank 15. The principle of the water purification mechanism 6 for treating organic pollutants belongs to the prior art and will not be elaborated here.

[0085] When the formation where the underground water flow channel 1 is located is relatively deep and the sewage pump is not sufficient to extract the sewage in the sedimentation well 5, first start the cylinder 1404 to drive the cylindrical sliding member 1403 downward until the cylindrical sliding member 1403 is engaged with the connecting groove 1405. At this time, the second vertical shaft 12 is communicated with the sedimentation well 5 through the cylindrical sliding member 1403. Then start the high-pressure water pump 16, and the high-pressure water enters the second vertical shaft 12 along the water inlet pipe, flows through the gap between the second vertical shaft 12 and the sewage pipe 11 to the sedimentation well 5, and continues to flow downward along the gap between the sedimentation well 5 and the sewage pipe 11.

[0086] The sewage located in the sedimentation well 5 enters the sewage pipe 11 from the bottom of the sedimentation well 5 under the upward pressure of the high-pressure water, and thus is extracted into the water purification mechanism 6. After the sewage extraction and purification are completed, the cylindrical sliding member 1403 is reset to the second position, that is, in the sliding chamber, by the cylinder 1404.

[0087] 3. When it is necessary to clean the movable collection cylinder 9, open the manhole cover 1002 of the first vertical shaft 10. The operator enters the first vertical shaft 10, takes out the pulling rope 18, arranges the sprocket mechanism 17 at the wellhead of the first vertical shaft 10, connects the pulling rope 18 with the sprocket mechanism 17, starts the sprocket mechanism 17, and pulls up the movable collection cylinder 9 until the movable collection cylinder 9 is lifted to the ground surface to clean the movable collection cylinder 9. After cleaning, the movable collection cylinder 9 can be lowered back into the sedimentation tank 8 (the movable collection cylinder 9 has sufficient weight and density, and the buoyancy of the groundwater can be ignored). Separate the pulling rope 18 from the sprocket mechanism 17 and wind it around the ladder 1001 near the wellhead of the first vertical shaft 10.

[0088] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, 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 should not be construed as a limitation to the present invention.

[0089] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An underground water pollution remediation device capable of preventing blockage, the underground water flow channel (1) is located on the upper surface of the lower rock stratum (2), and the upper rock stratum (3) is above the underground water flow channel (1), characterized in that, Comprising: A super-hydrophilic selective permeation membrane module (4), vertically arranged in the underground water flow channel (1) and capable of covering the longitudinal section of the underground water flow channel (1), with its upper end embedded in the upper rock stratum (3) and its lower end embedded in the lower rock stratum (2), and the super-hydrophilic selective permeation membrane module (4) is used to intercept organic pollutants in groundwater; A sedimentation well (5), opened in the lower rock stratum (2), the wellhead of the sedimentation well (5) is communicated with the underground water flow channel (1) and is close to the front end of the super-hydrophilic selective permeation membrane module (4), and the intercepted organic pollutants can settle into the sedimentation well (5); An extraction and purification mechanism, one end is communicated with the sedimentation well (5), and the other end is communicated with a water purification mechanism (6), and the water outlet end of the water purification mechanism (6) is communicated with the underground water flow channel (1) and is located behind the super-hydrophilic selective permeation membrane module (4).

2. The groundwater pollution remediation device capable of preventing blockage according to claim 1, wherein The super-hydrophilic selective permeation membrane module (4) includes, arranged in sequence: an activated carbon filter layer (401), a super-hydrophilic selective permeation membrane (402), and a geotextile layer (403); both the upper and lower ends of the activated carbon filter layer (401), the super-hydrophilic selective permeation membrane (402), and the geotextile layer (403) are provided with water-blocking connectors, and the two water-blocking connectors are respectively embedded in the upper rock stratum (3) and the lower rock stratum (2).

3. The groundwater pollution remediation device capable of preventing blockage according to claim 2, characterized in that, The underground water flow channel (1) expands to both sides centered on the sedimentation well (5) to form two arc-shaped expansion parts (103), and an organic pollutant interception area (104) is defined between the two arc-shaped expansion parts (103). The organic pollutant interception area (104) divides the underground water flow channel (1) into a first flow channel (101) and a second flow channel (102), and the first flow channel (101), the organic pollutant interception area (104), and the second flow channel (102) are connected in sequence; the super-hydrophilic selective permeation membrane module (4) is in a V shape, with the tip of its middle part arranged close to the entrance of the second flow channel (102), and both ends extend towards the two arc-shaped expansion parts (103) until they are connected to the arc-shaped expansion parts (103), and the sedimentation well (5) is located between the outlet of the first flow channel (101) and the super-hydrophilic selective permeation membrane module (4).

4. The groundwater pollution remediation device capable of preventing blockage according to claim 3, characterized in that, Also comprising: A grille (7), arranged at the outlet of the first flow channel (101) for intercepting domestic waste in groundwater; A sedimentation tank (8), opened in the lower rock stratum (2), the tank mouth of the sedimentation tank (8) is communicated with the first flow channel (101) and is close to the front end of the grille (7), and a movable collection cylinder (9) is placed in the sedimentation tank (8) for collecting the intercepted domestic waste. The top of the movable collection cylinder (9) is provided with an upper opening adapted to the tank mouth of the sedimentation tank (8), and a connecting ear is arranged near the upper opening of the collection cylinder; A first vertical shaft (10), longitudinally penetrating and arranged in the upper rock stratum (3), and the first vertical shaft (10) corresponds to the position of the sedimentation tank (8).

5. The groundwater pollution remediation device capable of preventing blockage according to claim 1, characterized in that, The extraction and purification mechanism includes: A sewage pipe (11), a second vertical shaft (12) is longitudinally penetrated through the upper rock stratum (3), the second vertical shaft (12) corresponds to the sedimentation well (5) in position, one end of the sewage pipe (11) extends into the sedimentation well (5) from the second vertical shaft (12) and is close to the bottom of the sedimentation well (5), and the other end of the sewage pipe (11) is led out from the top of the second vertical shaft (12) and communicated with the water purification mechanism (6); A sewage pump (13) is arranged on the sewage pipe (11).

6. The groundwater pollution remediation device capable of preventing blockage according to claim 5, characterized in that, It further includes: A closing mechanism (14) is arranged in the upper rock stratum (3), the closing mechanism (14) can move between a first position and a second position in the vertical direction. When the closing mechanism (14) moves to the first position, one end of the closing mechanism (14) is communicated with the bottom of the second vertical shaft (12), and the other end is communicated with the sedimentation well (5); when the closing mechanism (14) moves to the second position, the closing mechanism (14) moves into the upper rock stratum (3); A water tank (15) is communicated with the top of the second vertical shaft (12) through a water inlet pipe. The diameter of the sewage pipe (11) is smaller than the inner diameter of the second vertical shaft (12) and the inner diameter of the sedimentation well (5). The other end of the sewage pipe (11) penetrates through the water inlet pipe in a sealed manner and is communicated with the water purification mechanism (6); A high-pressure water pump (16) is arranged on the water inlet pipe.

7. A groundwater pollution remediation device capable of preventing blockage according to claim 6, characterized in that, The water tank (15) is communicated with the underground water flow channel (1) through a first water inlet pipe, and the connection point is behind the super-hydrophilic selective permeation membrane module (4), and is communicated with the water outlet end of the water purification mechanism (6) through a second water inlet pipe.

8. The groundwater pollution remediation device capable of preventing blockage according to claim 6, characterized in that, The closing mechanism (14) includes: An inner cylinder (1401), an installation chamber is defined between the outer side of the second vertical shaft (12) and the upper rock stratum (3), and the inner cylinder (1401) is sleeved on the outer side surface of the second vertical shaft (12); An outer cylinder (1402), which is concentrically arranged with the inner cylinder (1401) and fixed to the upper rock stratum (3); A cylindrical sliding member (1403), a sliding chamber is defined between the outer cylinder (1402) and the inner cylinder (1401), the cylindrical sliding member (1403) is adapted to the shape of the sliding chamber, and is arranged in the sliding chamber and is slidably connected with the inner cylinder (1401) and the outer cylinder (1402) in the vertical direction; A cylinder (1404) is arranged in the installation chamber and fixed on the outer side surface of the upper rock stratum (3) and / or the second vertical shaft (12), and the output end of the cylinder (1404) extends downward and is connected with the cylindrical sliding member (1403); A connection groove (1405) is opened on the bottom surface of the underground water flow channel (1). The cylinder (1404) can drive the cylindrical sliding member (1403) to slide between the first position and the second position. When the cylindrical sliding member (1403) is in the first position, the bottom of the cylindrical sliding member (1403) is inserted into the connection groove (1405) and communicates the second vertical shaft (12) and the sedimentation well (5); when the cylindrical sliding member (1403) is in the second position, the cylindrical sliding member (1403) is located in the sliding chamber.

9. The groundwater pollution remediation device capable of preventing blockage according to claim 8, wherein A sealing ring is provided at the bottom of the cylindrical sliding member (1403).

10. A groundwater pollution remediation device capable of preventing blockage according to claim 1, characterized in that, The water outlet end of the water purification mechanism (6) is close to the rear end of the super-hydrophilic selective permeation membrane module (4) and is inclined towards the direction where the super-hydrophilic selective permeation membrane module (4) is located.

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