A distributed permeable reactive wall for groundwater nitrate remediation

Abstract

The present disclosure provides a distributed permeable reaction wall for groundwater nitrate remediation, relating to the technical field of groundwater remediation. The distributed permeable reaction wall comprises a remediation wall shell, a driving adjusting member and a water supply assembly are installed in the remediation wall shell, a rotating groove is formed in the interior of the remediation wall shell, a plurality of remediation filter members for remediation of groundwater nitrate are connected to the part of the water supply assembly located in the rotating groove, and a plurality of water supply grooves are formed in the side of the remediation wall shell and are connected to the rotating groove. A plurality of remediation filter members are installed on the main water pipe of the entire reaction wall, and each filter member can be directionally adjusted as needed. The technical solution enables the reaction wall to flexibly respond to different groundwater pollution conditions and remediation needs, whether it is unilateral remediation, bilateral remediation or layered remediation, it can be easily realized. The distributed design makes the remediation process more comprehensive and can significantly improve the remediation efficiency of groundwater.

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] Nitrate contamination of groundwater is primarily caused by agricultural fertilization, domestic sewage, and industrial emissions, leading to excessive nitrate levels in water bodies, threatening drinking water safety and the ecological environment. Nitrates are easily converted into nitrites, posing a potential risk to human health. To prevent further spread of groundwater contamination, further groundwater treatment is necessary.

[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:

[0007] 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. The portion of the water supply component located in the rotating groove is connected to multiple repair filter components for repairing groundwater nitrate. Multiple 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.

[0008] According to one embodiment of the present disclosure, a top cover is fixedly connected to the top of the repair wall shell by screws.

[0009] 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 passes through 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 engaged with the extended end of the rack.

[0010] According to one embodiment of the present disclosure, the water supply assembly includes a main water pipe, to which multiple auxiliary water pipes are rotatably connected in sequence, and the multiple auxiliary water pipes are all connected to the adjacent repair filter elements, and driven gears are installed on the ends of the multiple auxiliary water pipes away from the main water pipe, and the driven gears are engaged with the adjacent racks; wherein, second sealing rings are provided at the connection positions of the multiple driven gears and the adjacent main water pipes, and first sealing rings are installed at the rotating connection parts of the main water pipe and the multiple auxiliary water pipes.

[0011] According to one embodiment of the present disclosure, a plurality of adjusting knobs are rotatably connected to the repair wall shell, and ends of the plurality of driven gears away from the secondary water pipe all penetrate the repair wall shell and are connected to adjacent adjusting knobs.

[0012] 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.

[0013] According to one embodiment of the present disclosure, the repair filter element includes a filter element housing, a primary filter screen is installed 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; wherein, a water inlet hole is opened on the filter element housing, the filter element housing is connected to the adjacent main water pipe through the water inlet hole, the filter element housing is rotatably connected to the rotating groove, and two rubber sealing strips are installed on the filter element housing, which are tightly fitted with the inner wall of the rotating groove.

[0014] 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.

[0015] According to one embodiment of the present disclosure, there are three repair filter elements connected to the secondary water pipe, and the three repair filter elements are arranged in a T-shape.

[0016] According to one embodiment of the present disclosure, there are two repair filter elements connected to the secondary water pipe, and the two repair filter elements are arranged horizontally or in an L-shape.

[0017] It can be seen from the above technical solutions that the present disclosure has at least one of the following advantages and positive effects:

[0018] The distributed permeable reaction wall for groundwater nitrate remediation disclosed in the present invention can achieve layer-by-layer filtration and effective removal of nitrates in groundwater through multiple adjustable and rotatable remediation filters, and the direction of each filter can be adjusted according to needs. 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

[0019] 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.

[0020] Figure 1 is a perspective structural schematic diagram of a distributed permeable reactive wall in the present disclosure from a first perspective.

[0021] Figure 2 is a perspective structural schematic diagram of a distributed permeable reactive wall in the present disclosure from a second perspective.

[0022] Figure 3 is a perspective structural schematic diagram of an internal structure of a repair wall shell in the present disclosure from a first perspective.

[0023] Figure 4 is a perspective structural schematic diagram of an internal structure of a repair wall shell in the present disclosure from a second perspective.

[0024] Figure 5 is a side view cross-sectional schematic diagram of a repair wall shell in the present disclosure.

[0025] Figure 6 is an internal structure schematic diagram of a repair filter in the present disclosure.

[0026] Figure 7 is a structure schematic diagram of a repair filter connected with a secondary water pipe in an embodiment in the present disclosure.

[0027] Figure 8 is a structure schematic diagram of a repair filter connected with a secondary water pipe in another embodiment in the present disclosure.

[0028] Figure 9 is a structure schematic diagram of a repair filter connected with a secondary water pipe in still another embodiment in the present disclosure.

[0029] Figure 10 is a schematic diagram of an installation position of a distributed permeable reactive wall in the present disclosure.

[0030] The main element reference signs in the figures are explained as follows:

[0031] 1, repair wall shell; 11, top cover; 12, water passage groove; 13, rotating groove;

[0032] 2, drive adjusting member; 21, servo motor; 22, driving gear; 23, rack; 24, adjusting knob; 25, driven gear;

[0033] 3, water supply assembly; 31, main water pipe; 32, water pump; 33, underground water communication pipe; 34, secondary water pipe;

[0034] 4. Repair filter element; 41. Filter element housing; 42. Primary filter screen; 43. Rubber seal; 44. Spacer; 45. Water inlet; 46. Primary filter block; 47. Secondary filter block;

[0035] 5. First sealing ring;

[0036] 6. Second sealing ring. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many 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 thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0038] Although relative terms such as "upper" and "lower" are used in this disclosure to describe the relationship of one component of the illustrations to another component, these terms are used in this disclosure for convenience only, such as based on the orientation of the examples depicted in the accompanying drawings. It is understood that if the device in the illustrations is flipped so that it is upside down, the component described as "upper" will become the component "lower". Other relative terms such as "high", "low", "top", "bottom", "front", "back", "left", "right", etc. have similar meanings. When a structure is "on" another structure, 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 the other structure.

[0039] refer to Figures 1 to 10 As shown, the present disclosure proposes a distributed permeable reaction wall for groundwater nitrate remediation, which includes a repair wall shell 1, in which a driving adjustment component 2 and a water supply component 3 are installed. A rotating groove 13 is provided inside the repair wall shell 1, and the water supply component 3 is located in the rotating groove 13 and is connected to a plurality of repair filter components 4 for repairing groundwater nitrate remediation. A plurality of water troughs 12 connected to 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 passes through and is inserted into the soil to be repaired.

[0040] 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 of the repair wall shell 1 by coating an anti-seepage and anti-corrosion coating on its external surface. This example embodiment does not specifically limit the anti-corrosion method of the repair wall shell 1.

[0041] 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 based on the example of the repair wall shell 1 being a rectangular shape.

[0042] In an exemplary embodiment of the present disclosure, the repair wall housing 1 may be composed of two half-shells. During installation, the two half-shells can be snapped together to form a complete repair wall housing 1. Specifically, a top cover 11 is fixedly connected to the top of the repair wall housing 1 via screws. The top cover 11 may be designed to be waterproof and sealed. For example, a sealing strip may be provided at the connection between the top cover 11 and the repair wall housing 1. The screws are fixed to squeeze the sealing strip between the top cover 11 and the repair wall housing 1, thereby sealing the repair wall housing 1.

[0043] In an exemplary embodiment of the present disclosure, the drive adjustment member 2 may include a servo motor 21 and a rack 23. The rack 23 may be slidably connected to the inner wall of the repair wall housing 1. For example, a slot may be defined in the inner wall of the repair wall housing 1, and the rack 23 may be disposed within the slot, thereby achieving a sliding connection with the inner wall of the repair wall housing 1. The top end of the rack 23 may penetrate and extend out of the top cover 11. The output shaft of the servo motor 21 is fixedly connected to a driving gear 22 via a coupling, and the driving gear 22 meshes with the extended end of the rack 23.

[0044] In an exemplary embodiment of the present disclosure, the water supply assembly 3 may include a main water pipe 31, to which multiple auxiliary water pipes 34 are rotatably connected in sequence. The number of auxiliary water pipes 34 may be set based on the application scenario, for example, four, five, or six auxiliary water pipes 34. This embodiment does not impose any specific limitation on the number of auxiliary water pipes 34. Each of the multiple auxiliary water pipes 34 is connected to an adjacent repair filter element 4, and a driven gear 25 is mounted on the end of the multiple auxiliary water pipes 34 away from the main water pipe 31. The driven gear 25 meshes with the adjacent rack 23.

[0045] 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.

[0046] In an optional embodiment, multiple adjustment knobs 24 are rotatably connected to the repair wall housing 1. Multiple driven gears 25, each with its end remote from the secondary water pipe 34, extend through the repair wall housing 1 and connect to adjacent adjustment knobs 24. The adjustment knobs 24 allow for proactive adjustment of the repair direction of each repair filter 4 if the drive adjustment member 2 is damaged or if the desired connection of the repair filter 4 cannot be accurately adjusted, providing greater flexibility in adjusting the repair filter 4 and improving the reliability of the device.

[0047] 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 provided 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, thereby indirectly achieving the purpose of repairing the nitrate in the groundwater and the surrounding soil; or, the groundwater that has infiltrated 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 by the repair filter 4. The filtered and repaired groundwater is then collected in the main water pipe 31 and discharged into the groundwater waterway through the connecting pipes 33, thereby achieving the purpose of repairing the nitrate in the groundwater and the surrounding soil.

[0048] 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.

[0049] 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 in an interlaced manner.

[0050] Among them, a water inlet hole 45 is opened on the filter element housing 41, and the filter element housing 41 is connected to the adjacent secondary water pipe 34 through the water inlet hole 45. The filter element housing 41 is rotatably connected to the rotating groove 13, and two rubber sealing strips 43 that fit tightly with the inner wall of the rotating groove 13 are installed on the filter element housing 41.

[0051] 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 .

[0052] The multiple first sealing rings 5 ​​arranged on the auxiliary water pipe 34 can work in coordination with the multiple repair filter elements 4. In the multiple repair filter elements 4, the auxiliary water pipe 34 injects water into the water flow through the water inlet hole 45, and then passes through the multiple primary filter blocks 46 and the secondary filter blocks 47 for filtering and processing, and then discharges 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 and flows into the soil, forming a primary groundwater treatment.

[0053] 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 impose any special restrictions on the length and curvature of the groundwater connecting pipe 33.

[0054] Working principle and usage of the present invention:

[0055] 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 locked and connected with screws using the top cover 11.

[0056] Then the entire repair wall shell 1 is buried in the location of the groundwater to be repaired. Figure 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 drive 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 a nearby range, such as within two kilometers. 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 restrictions on this.

[0057] 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 auxiliary 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 auxiliary 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 treatment, and then discharges 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 into the soil, forming a primary groundwater treatment.

[0058] 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. The arrangement of each group of T-shaped repair filters 4 can realize supply in three directions.

[0059] 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. It can also form a distributed permeable reaction wall that supplies water on both sides. It can also form a distributed permeable reaction wall that supplies water in layers. For example, groundwater can be supplied to soil at a certain height as needed. For example, under normal circumstances, the nitrate in the groundwater on one side of the repair wall shell 1 is in urgent need of repair. 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 to descend, 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 element 4 is in the middle position, the multiple repair filter elements 4 are all connected and water flow is continuously supplied to the side that is in urgent need of repair.

[0060] However, when the four groups of repair filters 4 are adjusted only by the rack 23, 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.

[0061] 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 reverse, 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 reverse, thereby forming a reverse repair of groundwater nitrate.

[0062] In one embodiment of the present disclosure, the primary filter block 46 is manufactured using the following steps:

[0063] S1. Washing, drying, and pulverizing natural corn cobs to remove impurities and improve the uniformity of subsequent modification. The pulverized corn cobs are then placed in a 15% alkaline hydrogen peroxide solution and heated in a constant temperature water bath at 80 degrees Celsius for six hours. During this process, the alkaline hydrogen peroxide can destroy the protective layer of lignin in the corn cobs, making the cellulose more susceptible to enzymatic hydrolysis and release;

[0064] S2, mixing the corn cob treated in step S1 with activated carbon and lime in a ratio of 2:1:1, and adding water half the volume of the lime for wet mixing;

[0065] S3, placing the paste prepared in step S2 into a quadrangular prism mold, pressing down to ensure final shaping, and finally drying in a drying oven at 65 degrees Celsius for 24 to 36 hours;

[0066] S4. Check the surface of the finished product, which should have many and uniform pores;

[0067] S5. Use polyvinyl alcohol to completely coat the surface of the primary filter block 46 to increase the hydrophilic effect;

[0068] S6. Place in a ventilated and dry place to dry in the shade, avoiding direct sunlight to prevent the surface of the primary filter block 46 from cracking. After 24 hours, the final product of the primary filter block 46 can be obtained.

[0069] The production of the secondary filter block 47 adopts the following steps:

[0070] S1. Prepare a mixture of 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;

[0071] S2, filtering and removing impurities using a filter, and placing the filtered mixed solution into a quadrangular prism mold and drying for four hours to obtain a finished product;

[0072] S3. Use polyvinyl alcohol to completely coat the surface of the secondary filter block 47 to increase the hydrophilic effect;

[0073] S4. Place in a ventilated and dry place to dry in the shade, avoid 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.

[0074] By making the primary filter block 46 and the secondary filter block 47 , the overall remediation of groundwater nitrate can be made more effective.

[0075] In an optional embodiment of the present disclosure, reference Figure 8As 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.

[0076] refer to Figure 9 As shown, the number of repair filter elements 4 connected to the secondary water pipe 34 can be two, and the two repair filter elements 4 are arranged in a horizontal direction.

[0077] Further improvements are made to the four groups of T-shaped repair filters in the embodiment of the present disclosure, turning them into straight and L-shaped ones. The corresponding designs can be changed to one-way output of groundwater or segmented supply of groundwater, forming a more diversified groundwater output method.

[0078] 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 the specific circumstances. In addition, in the description of this disclosure, unless otherwise specified, "plurality" means two or more.

[0079] It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in this disclosure. The present disclosure is capable of 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 this 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 this disclosure illustrate the best known ways to implement 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 drive adjustment component and a water supply component are installed in the repair wall shell; A rotating groove is provided inside the outer shell of the repair wall. The portion of the water supply assembly located in the rotating groove is connected to a plurality of repair filter elements for repairing nitrate in groundwater. The water supply assembly includes a main water pipe. A plurality of auxiliary water pipes are sequentially connected to the main water pipe in a rotating manner. The auxiliary water pipes are connected to the repair filter elements. The number of repair filter elements connected to each auxiliary water pipe is three or two. When there are three repair filter elements, they are arranged in a T-shape, or when there are two repair filter elements, they are arranged in an L-shape or a straight line. A plurality of water troughs connected to the rotating groove are provided on the side of the outer shell of the repair wall. 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 passes through and extends out of the top cover, the output shaft of the servo motor is connected to a driving gear, and the driving gear is meshed with the extended end of the rack; a driven gear is installed on the end of the secondary water pipe away from the main water pipe, and the driven gear and the rack are meshed with each other; a plurality of adjustment knobs are rotatably connected to the repair wall shell, and the ends of the plurality of driven gears away from the secondary water pipes pass through the repair wall shell and are connected to the adjustment knobs; 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; Among them, the distributed permeable reaction wall realizes the repair of groundwater nitrate through multiple groups of adjustable and rotatable repair filters, and each of the repair filters can adjust the repair direction through the driving adjustment member and the adjustment knob to achieve unilateral repair, bilateral repair or layered repair of groundwater nitrate, thereby improving the repair efficiency of groundwater.

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 1, characterized in that: 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.

4. The distributed permeable reactive wall according to claim 1, 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 a staggered manner. Among them, the filter element housing is provided with a water inlet hole, the filter element housing is connected to the adjacent main water pipe through the water inlet hole, the filter element housing is rotatably connected to the rotating groove, and two rubber sealing strips are installed on the filter element housing that fit tightly with the inner wall of the rotating groove.

5. The distributed permeable reactive wall according to claim 4, 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 shell.

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