A reaction wall device for groundwater remediation

Abstract

The present invention relates to the technical field of groundwater remediation, and specifically to a reaction wall device for groundwater remediation. A filter core wall is arranged in a hollow wall body, and a double-layer filter screen is arranged on the front and rear sides thereof. Gravel and sand, filter material and gravel and sand are sequentially filled from the outside to the inside and then to the outside, so that the gravel and sand block large particles of pollutants, which are filtered and precipitated by the filter material. At the same time, multiple cleaning groups and transmission groups for driving the cleaning groups for cleaning are arranged in the filter core wall. Specifically, a cleaning plate and a cleaning rod are synchronously made to perform circular motion, and a plurality of disturbing plates and a toggle plate are driven to rotate under the guidance of a gear ring group, thereby disturbing the gravel and sand and the filter material in the filter core wall, so that the pollutants and sediments float in the water and are pumped out by the outside, so as to achieve an automatic and thorough cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater remediation, and specifically to a reaction wall device for groundwater remediation. Background Art

[0002] The principle of the permeable reaction wall technology for groundwater remediation is to intercept the contaminant plume by installing a permeable active filter material wall underground. When the contaminant plume passes through the reaction wall, the contaminants are removed or transformed through precipitation, adsorption, redox, biodegradation, etc. within the permeable reaction wall, thereby achieving the purpose of purifying groundwater. It is applicable to contaminated groundwater and can treat BTEX (benzene, toluene, ethylbenzene, xylene), petroleum hydrocarbons, chlorinated hydrocarbons, metals, non-metals, radioactive substances, etc.

[0003] After the filter material in the reaction wall has precipitates, it is generally cleaned by manually disassembling the wall or directly setting an underground passage for draining the precipitates. However, manual cleaning is time-consuming and laborious and cannot meet the cleaning requirements of the reaction wall for large-scale groundwater remediation; in addition, the drainage cleaning is not thorough, and over time, it will also cause the accumulation and even caking of the precipitates of the filter material, thereby causing problems such as a decline in the filtering performance. Summary of the Invention

[0004] Objective: In view of at least one of the above technical problems, the present invention provides a reaction wall device for groundwater remediation to solve the problem that the precipitates of the filter material in the reaction wall of the prior art accumulate and even cake, thereby causing a decline in the filtering performance.

[0005] To achieve the above objective, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a reaction wall device for groundwater remediation, including an empty wall buried underground. A filter element wall is sleeved inside the empty wall. The inside of the filter element wall is a cavity structure and the top surface is open. A cavity for filling plain soil is provided inside the top of the filter element wall. Below the top of the filter element wall and embedded in the front and back surfaces are two pairs of filter meshes. Each pair of filter meshes includes an inner filter mesh and an outer filter mesh. Filter material is filled between the two inner filter meshes.

[0007] Several cleaning mechanisms are arranged inside the filter element wall; the cleaning mechanism includes a cleaning group and a transmission group arranged in the wall of the empty wall; the cleaning group includes a cleaning plate with an arc structure, a pair of cleaning rods, a disturbing movable plate rotatably connected to the cleaning plate, and several toggle plates rotatably connected to the outside of the cleaning rod, the cleaning plate and the pair of cleaning rods are arranged on the same central axis, the cleaning plate is located between the two inner filter screens, and the cleaning rod is located between the inner filter screen and the outer filter screen of the two pairs of filter screens; several gear ring groups are embedded in the inner filter screen for driving the rotation of several cleaning plates and several toggle plates; the transmission group includes a transmission shaft coaxially connected to the cleaning plate and the cleaning rod, a toothed belt sleeved on both ends of the transmission shaft, and a servo motor installed on the top surface of the empty wall.

[0008] As a further improvement of the present technical solution, a radial rod is fixedly connected to the middle of the inner wall of the cleaning plate, and a number of through openings for engaging with the disturbance plate are opened inside the cleaning plate and the radial rod. A double gear shaft is inserted into the middle of the side of the disturbance plate, and the gear end of the double gear shaft is located on the outside of the cleaning plate.

[0009] As a further improvement of the present technical solution, a single gear shaft is inserted into the middle of one side of the toggle plate, and the gear end of the single gear shaft is located on the inner side of the cleaning rod.

[0010] As a further improvement of the present technical solution, the gear ring group includes several concentric gear rings with different diameters, and a connecting plate is radially arranged between the center lines of each two adjacent gear rings, and the adjacent gear rings are connected by the connecting plate. Several of the double gear shafts are engaged with the tooth groove walls at the inner end of the gear ring group, and several of the single gear shafts are engaged with the tooth groove walls at the outer end of the gear ring group. Several rings are embedded on the outer filter screen, and a sleeve hole coaxially arranged with the sleeve is opened on the inner filter screen. The transmission shaft is plugged into the sleeve, and the gear ring group is clamped into the sleeve hole.

[0011] As a further improvement of this technical solution, one end of the cleaning rod is fixedly connected to a linkage ring, the outer end of the radial rod is fixedly connected to a circular ring with the same structure as the linkage ring but different size, and the transmission shaft is plugged into the linkage ring and the circular ring.

[0012] As a further improvement of the present technical solution, both ends of the transmission shaft are sleeved with transmission gears meshing with the toothed belt, vertical belt grooves are opened inside the front and rear ends of the hollow wall, and the belt grooves pass through the top surface of the hollow wall, the toothed belt is placed in the belt grooves, and both ends of the output shaft of the servo motor are sleeved with the toothed belt, so that the toothed belt can drive the transmission shaft to rotate under the drive of the servo motor.

[0013] As a further improvement of the present technical solution, a number of filter ports are provided at equal intervals and vertically on the front and rear end surfaces of the hollow wall body. The filter ports are arranged at the same height as the filter screen. Sealing mechanisms for opening and closing the filter ports are provided in the front and rear end surfaces of the hollow wall body. The sealing mechanisms include a number of sealing groups embedded in the number of filter ports, a control panel group embedded in the top surface of the hollow wall body, and a number of straight spring plates arranged on both sides of the top of the number of sealing groups.

[0014] As a further improvement of the present technical solution, the sealing group includes a pair of sealing rods, and the bottom ends of the sealing rods are close to each other and connected with a rotating shaft. The front and rear walls of the bottom of the filter port are each provided with a pair of sockets, and the rotating shaft is connected to the sockets; the control panel group includes a number of support blocks clamped between the top ends of the pairs of sealing rods and lifting rods fixed to the tops of the support blocks. The support frame of the servo motor is equipped with an electromagnet for moving the lifting rod upward through electromagnetic suction.

[0015] As a further improvement of the present technical solution, a plate groove is provided on the vertical inner wall of each filter port, and the upper end of the plate groove passes through the top surface of the empty wall. The plate groove has a triangular cavity structure and its upper port is larger than its lower port. The support block has an inverted triangular structure, and the top end of the sealing rod is provided with a rounded corner.

[0016] As a further improvement of the present technical solution, a boss is provided on the top surface of the sealing rod, a sealing block is clamped at the top end of the plate groove, the upper end of the straight spring piece is fixed to the bottom surface of the sealing block, the lower end of the straight spring piece is in contact with the outer surface of the boss, and the distance between the upper ends of a pair of straight spring pieces is equal to the width of the filter port.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The reaction wall device for groundwater remediation is equipped with a filter core wall in a hollow wall body, and a double-layer filter screen is arranged on the front and back sides thereof. Gravel sand, filter material and gravel sand are sequentially filled from the outside to the inside and then to the outside, so that the gravel sand blocks large particles of pollutants, which are filtered and precipitated by the filter material; at the same time, multiple cleaning groups and transmission groups for driving the cleaning groups to clean are arranged in the filter core wall. Specifically, the cleaning plate and the cleaning rod are synchronously moved in a circular motion, and the interference plate and the toggle plate are driven to rotate under the guidance of the gear ring group, thereby disturbing the gravel sand and filter material in the filter core wall, so that the pollutants and sediments float in the water and are pumped out to the outside, so as to achieve an automatic and thorough cleaning effect.

[0019] 2. The reaction wall device for groundwater remediation uses a sealing mechanism set on the front and rear inner walls of the filter element wall to assist the cleaning group in performing closed cleaning. When the electromagnet is powered on, several support blocks are magnetically attracted to move upward, and under the pressure of the straight spring piece, several pairs of sealing rods are driven to move closer to close the filter port. When the power is turned off and restored, several support blocks are inserted between the tops of several pairs of sealing rods, and they are unfolded to open the filter port for filtration. Description of the Drawings

[0020] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes, proportional dimensions, etc. of the components in the figures are only schematic and are used to assist in understanding the present invention, and do not specifically define the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can, under the teaching of the present invention, select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention.

[0021] Figure 1 Schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic diagram of the overall internal assembly structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 front view;

[0024] Figure 4 For the present invention Figure 2 side view;

[0025] Figure 5 Partial cross-sectional view of the assembly of the hollow wall and the filter element wall of the present invention;

[0026] Figure 6 Schematic diagram of the assembly structure of the cleaning group of the present invention;

[0027] Figure 7 Schematic diagram of the assembly structure of the cleaning plate and the cleaning rod of the present invention;

[0028] Figure 8 Partial exploded view of the cleaning plate assembly of the present invention;

[0029] Figure 9 Partial exploded view of the cleaning rod assembly of the present invention;

[0030] Figure 10 Schematic diagram of the assembly structure of the transmission group of the present invention;

[0031] Figure 11 [[ID=5�2]]Partial cross-sectional view of the hollow wall of the present invention;

[0032] Figure 12 Partial cross-sectional view of the filter element wall of the present invention;

[0033] Figure 13 For the present invention Figure 2 Schematic diagram of the structure at position A;

[0034] Figure 14 Partial exploded view of the assembly of the local sealing group and the control panel group of the present invention.

[0035] The meaning of each number in the figure is:

[0036] 100, hollow wall; 101, filter port; 102, plate slot; 103, belt slot; 104, jack; 110, filter element wall; 111, filter screen, inner filter screen 1111, outer filter screen 1112; 112, collar; 113, sleeve hole;

[0037] 200, cleaning mechanism; 210, cleaning group; 211, cleaning plate; 2111, radial rod; 2112, through port; 212, disturbance plate; 2121, dual gear shaft; 213, ring gear group; 2131, connecting plate; 214, cleaning rod; 2141, linkage ring; 215, toggle plate; 2151, single gear shaft; 220, transmission group; 221, transmission shaft; 2211, transmission gear; 222, toothed belt; 223, servo motor; 224, electromagnet;

[0038] 300, sealing mechanism; 310, sealing group; 311, sealing rod; 3111, boss; 3112, rotating shaft; 320, control panel group; 321, support block; 322, lifting rod; 323, sealing block; 324, folding spring; 330, straight spring. DETAILED DESCRIPTION

[0039] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explaining the present invention only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, which should be considered to fall within the scope of the present invention. The terms "mounted" and "connected" should be understood broadly and can refer to direct connection or indirect connection through an intermediary.

[0040] The terms "central axis," "vertical," "horizontal," "front," "back," "up," "down," "left," "right," "top," "bottom," "inside," and "outside" used herein to indicate positions or location relationships are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0041] See also Figures 1 - 14 As shown, the present invention provides a reaction wall device for groundwater remediation, including a hollow wall 100 buried underground, used to intercept sewage flowing to the water source, and a filter wall 110 is provided inside the hollow wall 100, used to filter sewage and flow to the water source.

[0042] like Figure 5 、 Figure 12 As shown, the interior of the filter wall 110 is a cavity structure with an open top surface. A cavity for filling with soil is provided in the top of the filter wall 110. A pair of filter screens 111 are embedded below the top of the filter wall 110 and are located at the front and back sides respectively. Each pair of filter screens 111 includes an inner filter screen 1111 and an outer filter screen 1112, wherein filter material is filled between the two inner filter screens 1111; wherein gravel and sand are filled between the inner filter screen 1111 and the outer filter screen 1112 in each pair of filter screens 111 to block large particles of pollutants.

[0043] In some embodiments, the filter material is selected from at least one of zero-valent iron, organic waste, clay minerals, and phosphates. The choice of these materials depends on the type and concentration of the pollutants. When the wastewater comes into contact with the filter material, the pollutants are adsorbed, precipitated, oxidized, reduced, or biodegraded.

[0044] Specifically, a plurality of cleaning mechanisms 200 are provided inside the filter element wall 110 for cleaning gravel and filter materials between the filter screens 111 to restore the filtering performance for long-term use.

[0045] In some embodiments, as Figure 2 As shown, the cleaning mechanism 200 includes a cleaning group 210 and a transmission group 220 disposed in the wall of the empty wall 100; Figures 6 - 9 As shown, the cleaning assembly 210 includes a cleaning plate 211 in an arc structure, a pair of cleaning rods 214, a disturbing plate 212 rotatably connected to the cleaning plate 211 and the pair of cleaning rods 214, and a plurality of toggle plates 215 rotatably connected to the outside of the cleaning rods 214. The cleaning plate 211 and the pair of cleaning rods 214 are arranged coaxially.

[0046] The cleaning plate 211 is located between the two inner filter screens 1111 and is used to clean sediment in the area where the filter material is located. The cleaning rod 214 is located between the inner filter screen 1111 and the outer filter screen 1112 of the pair of filter screens 111 and is used to clean pollutants in the area where gravel and sand are located. The inner filter screen 1111 is embedded with a plurality of gear ring groups 213 for driving the plurality of cleaning plates 211 and the plurality of toggle plates 215 to rotate.

[0047] like Figure 4 、 Figure 10 As shown, the transmission group 220 includes a transmission shaft 221 coaxially connected to the cleaning plate 211 and the cleaning rod 214, a toothed belt 222 sleeved on both ends of the transmission shaft 221, and a servo motor 223 installed on the top surface of the hollow wall 100. In some embodiments, a protective cover is further installed on the top surface of the hollow wall 100 to cover and protect the servo motor 223.

[0048] While the cleaning plate 211 and the cleaning rod 214 rotate synchronously, a plurality of cleaning plates 211 and a plurality of toggling plates 215 are guided to rotate self - by the plurality of gear ring groups 213, so as to stir the sediment and pollutants in the filter material and gravel to float out and be pumped out.

[0049] Further, as Figure 8 shown, a radial rod 2111 is welded to the middle of the inner wall of the cleaning plate 211, that is, the radial rod 2111 is located on the radial direction of the cleaning plate 211 and serves as the connecting part for driving the cleaning plate 211 to swing; a plurality of through - holes 2112 for clamping the disturbing plate 212 are opened inside the cleaning plate 211 and the radial rod 2111. A double - gear shaft 2121 is inserted into the middle of the side of the disturbing plate 212, and the gear end of the double - gear shaft 2121 is located outside the cleaning plate 211. When the disturbing plate 212 rotates self - in the through - holes 2112 and stirs in a circle in the filter material along with the cleaning plate 211, it can turn over to disturb the filter material, so that the sediment floats in the water to be pumped away.

[0050] Further, as Figure 9 shown, a single - gear shaft 2151 is inserted into the middle of one side of the toggling plate 215, and the gear end of the single - gear shaft 2151 is located on the inner side of the cleaning rod 214; when the toggling plate 215 rotates self - on one side of the cleaning rod 214 and stirs in a circle in the gravel and sand grains along with the cleaning rod 214, it can turn over to disturb them, so that the pollutants float in the water to be pumped away.

[0051] Specifically, as Figure 8 shown, the gear ring group 213 includes a plurality of concentric gear rings with different diameters, and a connecting plate 2131 is welded between the middle lines of every two adjacent gear rings, so that the overall structure of the gear ring group 213 is stable; a plurality of double - gear shafts 2121 are engaged with the inner - end tooth groove walls of the gear ring group 213, and a plurality of single - gear shafts 2151 are engaged with the outer - end tooth groove walls of the gear ring group 213, that is, the gear ring group 213 is divided into two sections along its axial direction, one section is located on the inner wall of the inner filter screen 1111, and one section is located on the outer wall of the inner filter screen 1111;

[0052] As Figure 12 shown, a plurality of collar rings 112 are embedded on the outer filter screen 1112, a collar hole 113 coaxial with the collar ring 112 is opened on the inner filter screen 1111, the transmission shaft 221 is inserted into the collar ring 112, and the collar ring 112 supports the stable rotation of the transmission shaft 221; the gear ring group 213 is clamped with the collar hole 113 and can be welded, so that the gear ring group 213 is fixedly connected to the inner filter screen 1111 and stably guides the self - rotation of a plurality of disturbing plates 212 and a plurality of toggling plates 215.

[0053] Further, as Figure 9As shown, a linkage ring 2141 is welded to one end of the cleaning rod 214, and a ring with the same structure but different dimensions from the linkage ring 2141 is welded to the outer end of the radial rod 2111. The transmission shaft 221 is inserted and fitted with both the linkage ring 2141 and this ring. As shown in the figure, a spline shaft structure can be used for the fitting to enable synchronous movement with each other.

[0054] Specifically, as Figure 10 、 Figure 11 shown, transmission gears 2211 meshing with the toothed groove belt 222 are sleeved on both ends of the transmission shaft 221. Vertically arranged grooved slots 103 are provided inside the front and rear ends of the hollow wall 100, and the grooved slots 103 penetrate through the top surface of the hollow wall 100. The toothed groove belt 222 is placed in the grooved slots 103. The output shaft ends of the servo motor 223 are sleeved and drivingly connected with the toothed groove belt 222, so that the toothed groove belt 222 can be hidden inside the hollow wall 100 and the transmission shaft 221 is driven to rotate by the servo motor 223, thereby driving the cleaning mechanism 200 to work and protecting the toothed groove belt 222 from the influence of corrosion.

[0055] In addition, as Figure 11 shown, a number of filter openings 101 are vertically and equidistantly arranged on the front and rear end faces of the hollow wall 100. The filter openings 101 are set at the same height as the filter screen 111. A sealing mechanism 300 for opening and closing the filter openings 101 is arranged inside the front and rear ends of the hollow wall 100. When it is necessary to clean the inside of the hollow wall 100, the filter openings 101 are closed, and the filter openings 101 are always open during the filtering process;

[0056] In some embodiments, as Figure 2 、 Figure 13 、 Figure 14 shown, the sealing mechanism 300 includes a number of sealing groups 310 embedded in a number of filter openings 101, a control plate group 320 embedded in the top surface of the hollow wall 100, and a number of pairs of straight elastic pieces 330 arranged on both sides of the top of the number of sealing groups 310; the control plate group 320 controls the number of sealing groups 310 to expand and open the filter openings 101. When the control plate group 320 does not control the number of sealing groups 310, the number of sealing groups 310 is elastically pressed by the number of pairs of straight elastic pieces 330 to close the filter openings 101, so that the cleaning mechanism 200 does not leak when cleaning the sediment and pollutants inside the hollow wall 100, ensuring thorough pumping and drainage of them.

[0057] Specifically, the sealing group 310 is composed of a pair of sealing rods 311, and a rotating shaft 3112 is inserted at the bottom ends thereof close to each other. As Figure 11 shown, a pair of insertion holes 104 are provided on the front and rear walls at the bottom of the filter opening 101, and the rotating shaft 3112 is inserted into the insertion holes 104, so that the filter opening 101 can be closed when the upper ends of the pair of sealing rods 311 approach and rotate;

[0058] The control panel assembly 320 includes a plurality of support blocks 321 that are clamped between the top ends of the plurality of pairs of sealing rods 311, and lifting rods 322 welded to the top ends of the support blocks 321. The support frame of the servo motor 223 is equipped with an electromagnet 224 for electromagnetically attracting and moving the lifting rods 322 upward. This allows the support blocks 321 to be lifted or lowered as a whole, and to be disengaged from or clamped between the top ends of the plurality of pairs of sealing rods 311. When the support blocks 321 are disengaged, the pairs of sealing rods 311 are closed together under the elastic pressure of the pairs of straight springs 330. Conversely, when the support blocks 321 are disengaged, the pairs of sealing rods 311 are pushed apart, opening the filter port 101 and releasing filtered water.

[0059] Specifically, if Figure 11 As shown, a plate groove 102 is formed on the vertical inner wall of each filter port 101, and the upper end of the plate groove 102 passes through the top surface of the hollow wall 100. The plate groove 102 has a triangular cavity structure and its upper end is larger than its lower end. The support block 321 has an inverted triangular structure, and the top end of the sealing rod 311 has a rounded corner, so that when the support block 321 is pressed down, the sealing rod 311 is smoothly opened through this rounded corner.

[0060] The top surface of the sealing rod 311 is provided with a boss 3111, and the top end of the plate slot 102 is clamped with a sealing block 323 for limiting the upward and downward movement of the support block 321. The upper end of the straight spring piece 330 is welded to the bottom surface of the sealing block 323, and the lower end of the straight spring piece 330 abuts the outer side surface of the boss 3111. The upper end spacing of the pair of straight spring pieces 330 is equal to the width of the filter port 101. Folding spring pieces 324 are overlapped at both ends of the lifting rod 322, and the outer ends of the folding spring pieces 324 are welded to the sealing block 323.

[0061] When the support block 321 is separated from the top of the pair of sealing rods 311, the pair of straight spring pieces 330 lose their lateral pressure and return to their original width, thereby contacting the boss 3111 and driving the sealing rods 311 to move closer, thereby closing the filter port 101. When the electromagnet 224 is powered off and the lifting rod 322 is no longer magnetically attracted, the elastic force of the folded spring piece 324 returning to its original shape drives the lifting rod 322 to drive the several support blocks 321 to descend, thereby spreading the top of the several pairs of sealing rods 311, thereby opening the filter port 101.

[0062] When cleaning the reaction wall device for groundwater remediation of the present invention, the electromagnet 224 is first energized to magnetically attract the lifting rod 322 to move upward, thereby driving the plurality of support blocks 321 to separate from between the tops of the plurality of pairs of sealing rods 311. Under the rebound action of the plurality of pairs of straight spring plates 330, the plurality of pairs of sealing rods 311 are driven to move closer to close the filter port 101. At this time, clean water is injected into the empty wall 100 to the top of the filter screen 111, and then the servo motor 223 is started to drive the toothed belt 222 to drive the plurality of transmission shafts 221 to rotate, thereby driving the plurality of cleaning groups 210 as a whole to rotate and stir in the filter material and gravel sand. At the same time, if the interference plate 212 and the plurality of toggle plates 215 rotate and stir in the filter material and gravel sand along with the cleaning plate 211 and the cleaning rod 214, and are guided by the gear ring group 213 to rotate, the disturbed sediment and pollutants are floated in the water and then pumped out by the external pump, ensuring that the filter material and gravel sand are thoroughly cleaned and the service life is extended.

[0063] It should be noted that the above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and substance of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A reaction wall device for groundwater remediation, comprising an empty wall body (100) buried underground, characterized in that, The hollow wall (100) is internally sleeved with a filter core wall (110), the interior of the filter core wall (110) is a cavity structure with an open top surface, the top of the filter core wall (110) is provided with a cavity for filling with soil, and two pairs of filter screens (111) are embedded below the top of the filter core wall (110) and at the front and back sides, each pair of filter screens (111) comprising an inner filter screen (1111) and an outer filter screen (1112), wherein the space between the two inner filter screens (1111) is filled with filter material; A plurality of cleaning mechanisms (200) are provided inside the filter element wall (110); the cleaning mechanism (200) comprises a cleaning group (210) and a transmission group (220) provided inside the wall of the empty wall (100); the cleaning group (210) comprises a cleaning plate (211) in an arc structure, a pair of cleaning rods (214), a disturbing movable plate (212) rotatably connected to the inside of the cleaning plate (211), and a plurality of toggle plates (215) rotatably connected to the outside of the cleaning rods (214); the cleaning plate (211) and the pair of cleaning rods (214) are provided on the same central axis; the cleaning plate (211) is located Between the two inner filter screens (1111), the cleaning rod (214) is located between the inner filter screen (1111) and the outer filter screen (1112) of the two pairs of filter screens (111); a plurality of gear ring groups (213) for driving a plurality of cleaning plates (211) and a plurality of toggle plates (215) to rotate are embedded on the inner filter screen (1111); the transmission group (220) comprises a transmission shaft (221) coaxially connected to the cleaning plate (211) and the cleaning rod (214), a toothed belt (222) sleeved on both ends of the transmission shaft (221), and a servo motor (223) installed on the top surface of the hollow wall (100).

2. The reaction wall device for groundwater remediation according to claim 1, wherein: A radial rod (2111) is fixedly connected to the middle of the inner wall of the cleaning plate (211); a plurality of through openings (2112) for engaging with the disturbance plate (212) are provided inside the cleaning plate (211) and the radial rod (2111); a double gear shaft (2121) is inserted into the middle of the side of the disturbance plate (212), and the gear end of the double gear shaft (2121) is located outside the cleaning plate (211).

3. The reaction wall device for groundwater remediation according to claim 2, wherein: A single gear shaft (2151) is inserted into the middle of one side of the shifting plate (215), and the gear end of the single gear shaft (2151) is located on the inner side of the cleaning rod (214).

4. The reaction wall device for groundwater remediation according to claim 3, characterized in that: The ring gear group (213) includes a number of concentric ring gears with different diameters, and a connecting plate (2131) is radially arranged between the center lines of every two adjacent ring gears. The adjacent ring gears are connected by the connecting plate (2131). A number of the double gear shafts (2121) are engaged with the inner end tooth groove walls of the ring gear group (213), and a number of the single gear shafts (2151) are engaged with the outer end tooth groove walls of the ring gear group (213). Among them, a number of collar rings (112) are embedded on the outer filter screen (1112), and sleeve holes (113) coaxial with the collar rings (112) are formed on the inner filter screen (1111). The transmission shaft (221) is inserted into the collar rings (112), and the ring gear group (213) is clamped with the sleeve holes (113).

5. The reaction wall device for groundwater remediation according to claim 4, characterized in that: One end of the cleaning rod (214) is fixedly connected with a linkage ring (2141). The outer end of the radial rod (2111) is fixedly connected with a ring having the same structure as the linkage ring (2141) but different dimensions. The transmission shaft (221) is inserted and fitted with both the linkage ring (2141) and the ring.

6. The reaction wall device for groundwater remediation according to claim 5, characterized in that: Both ends of the transmission shaft (221) are sleeved with transmission gears (2211) engaged with a tooth groove belt (222). Vertically arranged belt grooves (103) are formed inside the front and rear ends of the hollow wall body (100), and the belt grooves (103) penetrate through the top surface of the hollow wall body (100). The tooth groove belt (222) is placed in the belt grooves (103). Both ends of the output shaft of the servo motor (223) are sleeved and fitted with the tooth groove belt (222), so that the tooth groove belt (222) can drive the transmission shaft (221) to rotate under the drive of the servo motor (223).

7. The reaction wall device for groundwater remediation according to claim 6, characterized in that: A number of filter openings (101) are vertically and equidistantly arranged on the front and rear end faces of the hollow wall body (100). The filter openings (101) are arranged at the same height as the filter screen (111). A sealing mechanism (300) for opening and closing the filter openings (101) is arranged inside the front and rear ends of the hollow wall body (100). The sealing mechanism (300) includes a number of sealing groups (310) embedded in a number of the filter openings (101), a control board group (320) embedded in the top surface of the hollow wall body (100), and a number of pairs of straight elastic pieces (330) arranged on both sides of the tops of a number of the sealing groups (310).

8. The reaction wall device for groundwater remediation according to claim 7, wherein: The sealing group (310) includes a pair of sealing rods (311), and the bottom ends of the sealing rods (311) are close to each other and inserted with a rotating shaft (3112). A pair of insertion holes (104) are formed on the front and rear walls at the bottom of the filter opening (101), and the rotating shaft (3112) is inserted into the insertion holes (104). The control board group (320) includes a number of support blocks (321) clamped between the top ends of a number of pairs of sealing rods (311) and a lifting rod (322) fixedly connected to the tops of a number of the support blocks (321). An electromagnet (224) for electromagnetically attracting the lifting rod (322) to move upward is installed on the support frame of the servo motor (223).

9. The reaction wall device for groundwater remediation according to claim 8, characterized in that: A plate groove (102) is formed in the vertical inner wall of each of the filtering ports (101), and the upper end of the plate groove (102) penetrates through the top surface of the hollow wall body (100). The plate groove (102) has a triangular cavity structure, and its upper port is larger than its lower port. The supporting block (321) has an inverted triangular structure, and the top end of the sealing rod (311) is provided with a rounded corner.

10. The reaction wall device for groundwater remediation according to claim 9, characterized in that: A boss (3111) is provided on the top surface of the sealing rod (311). A sealing block (323) is clamped at the top port of the plate groove (102). The upper end of the straight elastic piece (330) is fixedly connected to the bottom surface of the sealing block (323). The lower end of the straight elastic piece (330) abuts against the outer side surface of the boss (3111), and the distance between the upper ends of a pair of straight elastic pieces (330) is equal to the width of the filtering port (101).

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