Distributed permeable reactive barrier for underground water nitrate remediation

Abstract

The invention provides a distributed permeable reactive barrier for groundwater nitrate remediation, and relates to the technical field of groundwater remediation. The distributed permeable reactive barrier comprises a repairing wall shell, a driving adjusting piece and a water supply assembly are installed in the repairing wall shell, a rotating groove is formed in the repairing wall shell, and the part, located in the rotating groove, of the water supply assembly communicates with a plurality of repairing filtering pieces for repairing underground water nitrate. A plurality of water passing grooves communicating with the rotating groove are formed in the side edge of the repairing wall shell. The main water pipe of the whole reaction wall is provided with a plurality of repairing filtering pieces, and the direction of each filtering piece can be adjusted according to needs. According to the technical scheme, the reaction wall can flexibly cope with different groundwater pollution conditions and repair requirements, single-side repair, double-side repair or layered repair can be easily achieved, the repair process is more comprehensive through the distributed design, and the groundwater repair efficiency can be remarkably improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of groundwater remediation, and in particular to a distributed permeable reaction wall for groundwater nitrate remediation. Background Art

[0002] Groundwater nitrate pollution is mainly caused by agricultural fertilization, domestic sewage and industrial discharge, which leads to excessive nitrate content in water bodies, threatening drinking water safety and the ecological environment. Nitrates are easily converted into nitrites, posing a potential risk to human health. In order to prevent the further spread of groundwater pollution, further treatment of groundwater is needed.

[0003] In the field of groundwater remediation, nitrate pollution is a common and serious problem. Traditional remediation methods are complicated to operate, and the direction and method of purification are relatively single. The efficiency of groundwater remediation is low and it is difficult to meet actual remediation needs. Summary of the invention

[0004] The purpose of the present disclosure is to provide a distributed permeable reaction wall for groundwater nitrate remediation, thereby effectively improving the efficiency of groundwater remediation.

[0005] Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

[0006] According to one aspect of the present disclosure, there is provided a distributed permeable reactive wall for groundwater nitrate remediation, comprising: A repair wall shell is provided, wherein a driving adjustment component and a water supply component are installed in the repair wall shell, a rotating groove is provided inside the repair wall shell, a portion of the water supply component located in the rotating groove is connected to a plurality of repair filters for repairing groundwater nitrate, and a plurality of water troughs connected to the rotating groove are provided on the side of the repair wall shell; wherein the bottom end of the water supply component penetrates and is inserted into the soil to be repaired.

[0007] According to one embodiment of the present disclosure, a top cover is fixedly connected to the top of the repair wall shell by screws.

[0008] According to one embodiment of the present disclosure, the driving adjustment member includes a servo motor and a rack, the rack is slidably connected to the inner wall of the repair wall shell, and the top end of the rack penetrates and extends out of the top cover, the output shaft of the servo motor is fixedly connected to a driving gear through a coupling, and the driving gear is meshed with the extended end of the rack.

[0009] According to one embodiment of the present disclosure, the water supply assembly includes a main water pipe, to which a plurality of auxiliary water pipes are rotatably connected in sequence, the plurality of auxiliary water pipes are all connected to the adjacent repair filter elements, and a driven gear is installed on one end of the plurality of auxiliary water pipes away from the main water pipe, and the driven gear is meshed with the adjacent rack; wherein a second sealing ring is provided at the connection position between the plurality of driven gears and the adjacent main water pipes, and a first sealing ring is installed at the rotatable connection position between the main water pipe and the plurality of auxiliary water pipes.

[0010] According to an embodiment of the present disclosure, a plurality of adjusting knobs are rotatably connected to the outer shell of the repair wall, and ends of a plurality of the driven gears away from the secondary water pipe all penetrate the outer shell of the repair wall and are connected to adjacent adjusting knobs.

[0011] According to one embodiment of the present disclosure, the bottom of the main water pipe is connected to a water pump, and the bottom of the water pump is connected to multiple pipes connecting to groundwater.

[0012] According to one embodiment of the present disclosure, the repair filter element includes a filter element shell, a primary filter screen is installed on the filter element shell, and the interior of the filter element shell is filled with a plurality of primary filter blocks and secondary filter blocks arranged in an interlaced manner; wherein, a water inlet hole is opened on the filter element shell, the filter element shell is connected to the adjacent main water pipe through the water inlet hole, the filter element shell is rotatably connected to the rotating groove, and two rubber sealing strips that are tightly fitted to the inner wall of the rotating groove are installed on the filter element shell.

[0013] According to one embodiment of the present disclosure, a plurality of spacers for limiting the positions of the primary filter block and the secondary filter block are installed inside the filter element housing.

[0014] According to an embodiment of the present disclosure, there are three repair filters connected to the secondary water pipe, and the three repair filters are arranged in a T shape.

[0015] According to one embodiment of the present disclosure, there are two repair filters connected to the secondary water pipe, and the two repair filters are arranged in a horizontal direction or in an L-shape.

[0016] It can be seen from the above technical solution that the present disclosure has at least one of the following advantages and positive effects: The distributed permeable reaction wall for groundwater nitrate remediation disclosed in the present invention can achieve layer-by-layer filtration and effective removal of nitrate in groundwater through multiple adjustable and rotatable remediation filters, and the direction of each filter can be adjusted as needed. This design enables the reaction wall to flexibly respond to different groundwater pollution conditions and remediation needs, and can achieve single-sided remediation, double-sided remediation or layered remediation, effectively improving the remediation efficiency of groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the distributed permeable reaction wall in the present disclosure at a first perspective.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the distributed permeable reaction wall in the present disclosure at a second viewing angle.

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the internal structure of the outer shell of the repair wall in the present invention at a first viewing angle.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the inner structure of the outer shell of the repaired wall in the present disclosure at a second viewing angle.

[0022] Figure 5 is a side cross-sectional schematic diagram of a repair wall shell in the present disclosure.

[0023] Figure 6 It is a schematic diagram of the internal structure of the repair filter in the present disclosure.

[0024] Figure 7 It is a schematic structural diagram of the connection between the repair filter element and the secondary water pipe in one embodiment of the present disclosure.

[0025] Figure 8 It is a schematic structural diagram of the connection between the repair filter element and the secondary water pipe in another embodiment of the present disclosure.

[0026] Fig. 9 It is a structural schematic diagram of the connection between the repair filter element and the secondary water pipe in another embodiment of the present disclosure.

[0027] Fig.10 It is a schematic diagram of the installation position of the distributed permeable reaction wall in the present disclosure.

[0028] The main components in the figure are described as follows: 1. Repair the wall shell; 11. Top cover; 12. Water channel; 13. Rotating channel; 2. Driving adjustment member; 21. Servo motor; 22. Driving gear; 23. Rack; 24. Adjustment knob; 25. Driven gear; 3. Water supply assembly; 31. Main water pipe; 32. Water pump; 33. Groundwater connecting pipe; 34. Auxiliary water pipe; 4. Repair filter element; 41. Filter element housing; 42. Primary filter screen; 43. Rubber sealing strip; 44. Spacer strip; 45. Water inlet hole; 46. Primary filter block; 47. Secondary filter block; 5. The first sealing ring; 6. Second sealing ring. DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0030] Although relative terms such as "upper" and "lower" are used in this disclosure to describe the relative relationship of one component of the illustration to another component, these terms are used in this disclosure only for convenience, such as the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned over so that it is upside down, the component described as being "upper" will become the component "lower". Other relative terms, such as "high", "low", "top", "bottom", "front", "back", "left", "right", etc., are also used to have similar meanings. When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0031] refer to Figures 1 to 10 As shown, the present disclosure proposes a distributed permeable reaction wall for groundwater nitrate remediation, the distributed permeable reaction wall comprises a repair wall shell 1, a driving adjustment component 2 and a water supply component 3 are installed in the repair wall shell 1, a rotating groove 13 is provided inside the repair wall shell 1, a portion of the water supply component 3 located in the rotating groove 13 is connected with a plurality of repair filter components 4 for repairing groundwater nitrate, a plurality of water troughs 12 connected with the rotating groove 13 are provided on the side of the repair wall shell 1; wherein, the bottom end of the water supply component 3 penetrates and is inserted into the soil to be repaired.

[0032] Among them, the repair wall shell 1 can be made of corrosion-resistant materials. For example, the repair wall shell 1 can be made of fiberglass, stainless steel or polymer composite materials. Of course, the repair wall shell 1 can also reduce the material requirements for the repair wall shell 1 by coating an anti-seepage and anti-corrosion coating on its outer surface. This example embodiment does not specifically limit the anti-corrosion method of the repair wall shell 1.

[0033] The overall shape of the distributed permeable reactive wall can be a rectangular structure, and accordingly, the repair wall shell 1 can be a rectangular shape; the overall shape of the distributed permeable reactive wall can also be a cylindrical structure, a spherical structure, etc., and accordingly, the repair wall shell 1 can also be a cylindrical shape, a spherical shape, etc. This example embodiment does not specifically limit the shape of the repair wall shell 1. For the sake of ease of explanation and understanding, the following explanation will be taken as an example of the repair wall shell 1 being in a rectangular shape.

[0034] In an exemplary embodiment of the present disclosure, the repair wall shell 1 may be composed of two half shells. During installation, the two half shells may be snapped together to obtain a complete repair wall shell 1. Specifically, the top of the repair wall shell 1 is fixedly connected with a top cover 11 by screws. The top cover 11 may be designed to be waterproof and sealed. For example, a sealing strip may be provided at the connection position between the top cover 11 and the repair wall shell 1. The sealing strip between the top cover 11 and the repair wall shell 1 is squeezed by the fixing of the screws, thereby achieving sealing of the repair wall shell 1.

[0035] In an exemplary embodiment of the present disclosure, the driving adjustment member 2 may include a servo motor 21 and a rack 23, wherein the rack 23 may be slidably connected to the inner wall of the repair wall shell 1. For example, a slide groove may be provided on the inner wall of the repair wall shell 1, and the rack 23 is disposed in the slide groove, thereby achieving a sliding connection with the inner wall of the repair wall shell 1. The top end of the rack 23 may penetrate and extend out of the top cover 11, and the output shaft of the servo motor 21 is fixedly connected to a driving gear 22 through a coupling, and the driving gear 22 is meshed with the extended end of the rack 23.

[0036] In an exemplary embodiment of the present disclosure, the water supply assembly 3 may include a main water pipe 31, and multiple auxiliary water pipes 34 are sequentially connected to the main water pipe 31 in rotation. The number of auxiliary water pipes 34 can be set according to the application scenario. For example, there can be four auxiliary water pipes 34, or five auxiliary water pipes 34, or six auxiliary water pipes 34. This embodiment does not specifically limit the number of auxiliary water pipes 34. The multiple auxiliary water pipes 34 are all connected to the adjacent repair filter element 4, and a driven gear 25 is installed on one end of the multiple auxiliary water pipes 34 away from the main water pipe 31, and the driven gear 25 is meshed with the adjacent rack 23.

[0037] Among them, a second sealing ring 6 is provided at the connection position of multiple driven gears 25 and adjacent main water pipes 31, and a first sealing ring 5 is installed at the rotating connection position between the main water pipe 31 and multiple auxiliary water pipes 34. The first sealing ring 5 and the second sealing ring 6 can realize the rotation adjustment of the repair filter 4 while ensuring that groundwater does not leak into the interior of the distributed permeable reaction wall, avoiding possible secondary pollution and improving the groundwater repair effect.

[0038] In an optional embodiment, a plurality of adjusting knobs 24 are rotatably connected to the repair wall housing 1, and the ends of the plurality of driven gears 25 away from the auxiliary water pipe 34 all penetrate the repair wall housing 1 and are connected to adjacent adjusting knobs 24. By setting the adjusting knobs 24, when the driving adjusting member 2 is damaged or the connection mode of the required repair filter 4 cannot be accurately adjusted, the repair direction of each repair filter 4 can be actively adjusted, and the adjustment of the repair filter 4 is more flexible, thereby improving the reliability of the device.

[0039] Optionally, a water pump 32 is connected to the bottom of the main water pipe 31, and a plurality of connecting pipes 33 connected to the groundwater are arranged at the bottom of the water pump 32. The groundwater can be pumped to the main water pipe 31 through the connecting pipes 33 and the water pump 32, so that the nitrate in the soil around the distributed permeable reaction wall can be diluted and filtered through the repair filter 4 and the auxiliary water pipe 34, and the purpose of repairing the nitrate in the groundwater and the surrounding soil can be indirectly achieved; or, the groundwater infiltrated in the soil around the distributed permeable reaction wall can be sucked into the repair filter 4 through the connecting pipes 33 and the water pump 32, and filtered and repaired through the repair filter 4, and the filtered and repaired groundwater is collected in the main water pipe 31, and discharged into the groundwater waterway through the connecting pipes 33, so as to achieve the purpose of repairing the nitrate in the groundwater and the surrounding soil.

[0040] The driving adjustment component 2 can be used in conjunction with the water supply component 3 to complete groundwater repair. For example, if the groundwater nitrate on one side of the wall shell 1 needs to be repaired urgently, the servo motor 21 can be started to drive the driving gear 22 to rotate. When the driving gear 22 rotates, it will drive the rack 23 to descend, and the rack 23 will drive multiple driven gears 25 to rotate during the descent process. When the driven gear 25 rotates, the auxiliary water pipe 34 will drive its corresponding repair filter 4 to rotate. Inside the rotating groove 13, the rotation of the four auxiliary water pipes 34 will be combined into different passages.

[0041] In an optional embodiment, the repair filter element 4 includes a filter element housing 41, a primary filter screen 42 is installed on the filter element housing 41, and the interior of the filter element housing 41 is filled with a plurality of primary filter blocks 46 and secondary filter blocks 47 arranged alternately with each other.

[0042] Among them, a water inlet hole 45 is opened on the filter housing 41, and the filter housing 41 is connected with the adjacent secondary water pipe 34 through the water inlet hole 45. The filter housing 41 is rotatably connected to the rotating groove 13, and two rubber sealing strips 43 that are tightly fitted with the inner wall of the rotating groove 13 are installed on the filter housing 41.

[0043] Optionally, a plurality of spacers 44 for limiting the positions of the primary filter block 46 and the secondary filter block 47 are installed inside the filter element housing 41 .

[0044] The multiple first sealing rings 5 ​​arranged on the secondary water pipe 34 can work in coordination with the multiple repair filter elements 4. In the multiple repair filter elements 4, the secondary water pipe 34 injects water into the water flow through the water inlet hole 45, and then passes through multiple primary filter blocks 46 and secondary filter blocks 47 for filtering and processing, and then is discharged from the repair filter element 4 through the primary filter screen 42 on the filter element housing 41, and finally overflows through the water trough 12 to flow into the soil, forming a primary groundwater treatment.

[0045] Furthermore, the length and curvature of the groundwater connecting pipe 33 can be set according to the location of the groundwater waterway that needs to be repaired in the application scenario, and the most suitable laying path can be found for laying. This embodiment does not specifically limit the length and curvature of the groundwater connecting pipe 33.

[0046] Working principle and use method of the present invention: When the distributed permeable reaction wall in the embodiment of the present disclosure is used, the repair wall shell 1 is first assembled with the drive adjustment component 2 and the water supply component 3, and then the repair wall shell 1 is snapped into place and connected with screws using the top cover 11.

[0047] Then the entire repair wall shell 1 is buried in the location of the groundwater to be repaired. Fig.10 As shown, the top cover 11 can be made slightly higher than the horizontal plane, and a small groove can be opened on the side where the driving adjustment member 2 is located to facilitate the operation of the adjustment knob 24. After the water pump 32 is installed underground, according to the distribution of groundwater, multiple groundwater connecting pipes 33 can be laid to the source of polluted water within two kilometers nearby. If the underground geological conditions are relatively complex, the groundwater connecting pipes 33 can be laid first and then the wall shell 1 can be installed and repaired. This embodiment does not make any special limitations on this.

[0048] After the distributed permeable reaction wall is installed, the water pump 32 can be started to suck the contaminated groundwater into the main water pipe 31 through the groundwater connecting pipe 33, and then poured into the multiple repair filter elements 4 through the secondary water pipe 34 set on the main water pipe 31, and multiple first sealing rings 5 ​​to work together. In the multiple repair filter elements 4, the secondary water pipe 34 pours water into the water flow through the water inlet hole 45, and then passes through multiple primary filter blocks 46 and secondary filter blocks 47 for filtering and treatment, and then is discharged from the repair filter element 4 through the primary filter screen 42 on the filter element housing 41, and finally overflows through the water trough 12 to flow into the soil, forming a primary groundwater treatment.

[0049] In an alternative embodiment, reference Figure 3 , Figure 4 and Figure 7As shown, each main water pipe 31 is provided with at least four auxiliary water pipes 34, and three repair filters 4 are installed at the corresponding positions of each auxiliary water pipe 34, thereby forming four groups of T-shaped repair filters 4. Each group of T-shaped repair filters 4 can achieve supply in three directions.

[0050] The above structure can form four groups of distributed permeable reaction walls that are interconnected and only supply water to one side of the repair wall shell 1, or form a distributed permeable reaction wall that supplies water to both sides, or form a distributed permeable reaction wall that supplies water in layers, such as supplying groundwater only to soil at a certain height as needed. For example, under normal circumstances, if the nitrate in the groundwater on one side of the repair wall shell 1 needs to be repaired urgently, the servo motor 21 can be started to drive the driving gear 22 to rotate. When the driving gear 22 rotates, the rack 23 will be driven down, and the rack 23 will drive multiple driven gears 25 to rotate during the descent. When the driven gear 25 rotates, the auxiliary water pipe 34 will drive its corresponding repair filter 4 to rotate; inside the rotating groove 13, the rotation of the four auxiliary water pipes 34 will be combined into different passages. When it rotates to Figure 5 When the filter elements 4 are in the middle position, the plurality of repair filter elements 4 are all connected and water is continuously supplied to the side in urgent need of repair.

[0051] However, when only the rack 23 is used to adjust the four groups of repair filters 4, the desired overflow direction may not be achieved. Therefore, the direction of each group of repair filters 4 can be adjusted by actively rotating the adjustment knob 24 at the corresponding position when the rack 23 does not contact the driven gear 25. The operation can be completed and the corresponding angle can be adjusted as needed to reach the soil and groundwater areas that need to be repaired.

[0052] In an optional embodiment of the present disclosure, the installation position of the distributed permeable reaction wall can also be to directly install the repair wall shell 1 on the soil layer where the contaminated groundwater is located. In this case, the water pump 32 is started to rotate in the reverse direction, and the suction force of the water pump 32 can be adjusted to be smaller. A filter screen for filtering mud and sand is installed on the water trough 12. After the groundwater penetrates into the repair wall shell 1 through the water trough 12, it is processed by the repair filter element 4 in the rotating trough 13 plate, and then output to the underground river through the groundwater connecting pipe 33 in the reverse direction, thereby forming a reverse repair of groundwater nitrate.

[0053] In one embodiment of the present disclosure, the primary filter block 46 is manufactured using the following steps: S1. Washing, drying and crushing the natural corn cob to remove impurities and improve the uniformity of subsequent modification, then placing the crushed corn cob in a 15% alkaline hydrogen peroxide solution and heating it in a constant temperature water bath at 80 degrees Celsius for six hours. During this process, the alkaline hydrogen peroxide can destroy the lignin protective layer in the corn cob, making the cellulose easier to enzymatically hydrolyze and release; S2, mixing the corn cob treated in step S1 with activated carbon and lime in a ratio of 2:1:1, and adding water with a half volume of the lime for wet mixing; S3, putting the paste-like object processed in step S2 into a quadrangular prism mold, pressing down to ensure the final shaping, and finally putting it into a drying oven at 65 degrees Celsius for drying for 24 to 36 hours; S4. Check the surface of the finished product, which should have more and uniform pores; S5. Use polyvinyl alcohol to completely coat the surface of the primary filter block 46 to increase the hydrophilic effect; S6. Place the filter block 46 in a ventilated and dry place to dry in the shade, avoiding direct sunlight to prevent the surface of the first-stage filter block 46 from cracking. After 24 hours, the final product of the first-stage filter block 46 can be obtained.

[0054] The production of the secondary filter block 47 adopts the following steps: S1. Prepare ethylene and methacrylic acid in a ratio of 1:1, then add the same amount of dimethacrylate as the mass of ethylene, add the same amount of methanol, add a copper catalyst equivalent to one tenth the mass of ethylene, and add the same mass of triethylamine to assist the reaction; S2, filtering and removing impurities by using a filter, and placing the filtered mixed solution into a quadrangular prism mold and drying it for four hours to obtain a finished product; S3, using polyvinyl alcohol to completely coat the surface of the secondary filter block 47 to increase the hydrophilic effect; S4. Place the filter block 47 in a ventilated and dry place to dry in the shade, avoiding direct sunlight to prevent the surface of the secondary filter block 47 from cracking. After 24 hours, the final product of the secondary filter block 47 can be obtained.

[0055] By making the primary filter block 46 and the secondary filter block 47, the overall remediation of groundwater nitrate can be made more effective.

[0056] In an optional embodiment of the present disclosure, reference Figure 8 As shown, the number of the repair filter elements 4 connected to the secondary water pipe 34 can also be two, and the two repair filter elements 4 are arranged in an L shape.

[0057] refer to Fig. 9 As shown, the number of the repair filter elements 4 connected to the secondary water pipe 34 may be two, and the two repair filter elements 4 are arranged in a horizontal direction.

[0058] Further improvements are made to the four groups of T-shaped repair filters in the disclosed embodiment, changing them into straight and L-shaped shapes. The corresponding designs can be changed into one-way groundwater output or segmented groundwater supply, forming more diversified groundwater output methods.

[0059] In the description of this disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this disclosure, unless otherwise specified, "plurality" means two or more.

[0060] It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in the present disclosure. The present disclosure can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure defined in the present disclosure extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in the present disclosure illustrate the best modes known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

1. A distributed permeable reactive wall for groundwater nitrate remediation, characterized in that: include: A repair wall shell, wherein a driving adjustment member and a water supply assembly are installed in the repair wall shell; A rotating groove is provided inside the outer shell of the repair wall, and a plurality of repair filters for repairing nitrate in groundwater are connected to the part of the water supply component located in the rotating groove. A plurality of water channels connected to the rotating groove are provided on the side of the outer shell of the repair wall; Wherein, the bottom end of the water supply component penetrates and is inserted into the soil to be repaired.

2. The distributed permeable reactive wall according to claim 1, characterized in that: The top of the repair wall shell is fixedly connected with a top cover by screws.

3. The distributed permeable reactive wall according to claim 2, characterized in that: The driving adjustment member includes a servo motor and a rack; The rack is slidably connected to the inner wall of the repair wall shell, and the top end of the rack penetrates and extends out of the top cover. The output shaft of the servo motor is fixedly connected to a driving gear through a coupling, and the driving gear is meshed with the extended end of the rack.

4. The distributed permeable reactive wall according to claim 3, characterized in that: The water supply assembly comprises a main water pipe, on which a plurality of auxiliary water pipes are rotatably connected in sequence, and the plurality of auxiliary water pipes are all connected to the adjacent repair filter elements, and a driven gear is installed on one end of the plurality of auxiliary water pipes away from the main water pipe, and the driven gear is meshed with the adjacent rack; Wherein, a second sealing ring is provided at the connection position between the plurality of driven gears and the adjacent main water pipes, and a first sealing ring is installed at the rotation connection position between the main water pipe and the plurality of auxiliary water pipes.

5. The distributed permeable reactive wall according to claim 4, characterized in that: A plurality of adjusting knobs are rotatably connected to the outer shell of the repair wall, and ends of the plurality of driven gears away from the auxiliary water pipe all penetrate the outer shell of the repair wall and are connected to adjacent adjusting knobs.

6. The distributed permeable reactive wall according to claim 4, characterized in that: The bottom of the main water pipe is connected to a water pump, and the bottom of the water pump is connected to a plurality of groundwater connecting pipes.

7. The distributed permeable reactive wall according to claim 6, characterized in that: The repair filter element comprises a filter element housing, a primary filter screen is mounted on the filter element housing, and the interior of the filter element housing is filled with a plurality of primary filter blocks and secondary filter blocks arranged in an interlaced manner; Among them, the filter element shell is provided with a water inlet hole, the filter element shell is connected with the adjacent main water pipe through the water inlet hole, the filter element shell is rotatably connected with the rotating groove, and two rubber sealing strips tightly fitting with the inner wall of the rotating groove are installed on the filter element shell.

8. The distributed permeable reactive wall according to claim 7, characterized in that: A plurality of spacers for limiting the positions of the primary filter block and the secondary filter block are installed inside the filter element housing.

9. The distributed permeable reactive wall according to claim 4, characterized in that: The number of repair filter elements connected to the secondary water pipe is three, and the three repair filter elements are arranged in a T shape.

10. The distributed permeable reactive wall according to claim 4, characterized in that: The number of repair filter elements connected to the secondary water pipe is two, and the two repair filter elements are arranged in a horizontal direction or in an L-shape.

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