Permeation type reactive barrier for underground water treatment

Abstract

The invention belongs to the technical field of underground sewage treatment, and provides a permeable reactive barrier for underground water treatment, the permeable reactive barrier comprises a wall body frame, a filling cavity and an operation cavity which are communicated with each other are sequentially arranged at intervals along the length direction, and windows are respectively arranged on two sides of the filling cavity in the thickness direction of the wall body frame; the filling assembly is arranged in the filling cavity and detachably connected with the wall frame, the filling assembly is provided with a plurality of liquid permeable channels in the thickness direction of the wall frame, and the liquid permeable channels are communicated with the pipe window; and the operation assembly is arranged in the operation cavity and detachably connected with the wall frame, and the operation assembly is suitable for filling the filling assembly with chemicals or dredging the filling assembly when the filling assembly is blocked. Through the detachable connection design of the wall body frame, the filling assembly and the operation assembly, the replacement of the filling material and the dredging of the wall body are more convenient, the efficiency is improved, and the operation assembly is used for filling necessary medicaments into the filling assembly, so that the reaction wall is not easy to block.

Description

Technical Field

[0001] The invention belongs to the technical field of underground sewage treatment, and in particular relates to a permeable reaction wall for underground water treatment. Background Art

[0002] Permeable reactive barrier (PRB) is an underground sewage treatment device used to remove pollutants in groundwater and soil in situ. Permeable reactive barrier is an active material wall placed underground to intercept pollutant plumes. After the pollutant plumes pass through the reaction medium, the pollutants can be converted into another form acceptable to the environment, thereby achieving the goal of making the pollutant concentration reach the environmental standard.

[0003] The permeable reaction wall used for groundwater treatment is generally installed at the depth of the groundwater aquifer. The construction type is usually a concealed project. When this type of technology is applied, the landfill method of disposable reagents and wall aggregates is mainly used. When the groundwater pollution plume flows through the reaction wall, all pollutants are reacted and removed, achieving the remediation goal.

[0004] In the related art, the design of permeable reaction walls for groundwater treatment has requirements for permeability coefficient. As the use time of the reaction wall increases, the local stratum water flow disturbance is large or the unstable stratum fine particles are washed into the reaction wall area. As the pollutant treatment volume increases, the amount of sediment or other insoluble matter deposited in the pores between aggregates of the permeable reaction wall mainly based on stabilization or precipitation reaction increases, which may cause blockage. After blockage occurs, it is usually necessary to replace the reaction wall as a whole, resulting in a decrease in sewage treatment efficiency. Summary of the invention

[0005] In view of this, the present invention provides a permeable reaction wall for groundwater treatment to solve the problem in the prior art that the reaction wall is prone to blockage over a long period of time and needs to be replaced as a whole after blockage, resulting in low sewage treatment efficiency.

[0006] The present invention provides a permeable reaction wall for groundwater treatment, comprising: a wall frame, on which mutually connected filling cavities and operating cavities are sequentially arranged at intervals along the length direction, and the filling cavities are respectively provided with windows on both sides of the thickness direction of the wall frame; a filling component, which is arranged in the filling cavity and is detachably connected to the wall frame, and the filling component is provided with a plurality of liquid permeable channels in the thickness direction of the wall frame, and the liquid permeable channel connecting pipes are connected to the windows; an operating component, which is arranged in the operating cavity and is detachably connected to the wall frame, and the operating component is suitable for filling the filling component with medicine or clearing the filling component when the filling component is blocked.

[0007] In some optional embodiments, the filling assembly includes a plurality of filling units, and the plurality of filling units are overlapped in sequence in a height direction of the wall frame, wherein each of the filling units is provided with the plurality of liquid-permeable channels.

[0008] In some optional embodiments, the packing unit includes a packing skeleton and a protective net, the packing skeleton and the protective net constitute a packing space, the packing space is suitable for filling the reaction medium, and the protective net constitutes a plurality of the liquid-permeable channels.

[0009] In some optional embodiments, two adjacent packing skeletons have a concave structure and a convex structure that match each other, and the convex structure is provided with a hanging hole; and / or at least one partition net is provided in the packing space to divide the packing space into multiple sub-spaces.

[0010] In some optional embodiments, the operating component includes: an operating box, provided with a first inlet and outlet; a first pipeline, provided at the top of the operating box, the first pipeline extending to the interior of the operating box, the first pipeline provided with a first opening, the first opening being opposite to the first inlet and outlet so that the first opening and the first inlet and outlet are interconnected; a first switch, provided at the top of the operating box, the first switch being suitable for opening the first inlet and outlet so that liquid flows between the filling cavity and the first pipeline through the first inlet and outlet and the first opening; or the first switch is suitable for closing the first inlet and outlet.

[0011] In some optional embodiments, the operating component also includes an observation tube, which is disposed at the top of the operating box. The observation tube extends into the interior of the operating box and is provided with an opening connected to the first pipeline so that the liquid entering the first pipeline enters the observation tube.

[0012] In some optional embodiments, a penetration hole is provided on the wall frame corresponding to the operation cavity, and the operation box is provided with a second inlet and outlet, the second inlet and outlet are arranged opposite to the penetration hole, and the second inlet and outlet and the first inlet and outlet are arranged on different sides of the operation box, and the operation component also includes: a second pipeline, provided at the top of the operation box, the second pipeline extends to the interior of the operation box, a second opening is provided on the second pipeline, the second opening is opposite to the second inlet and outlet, so that the second opening and the second inlet and outlet are connected to each other; a second switch, provided at the top of the operation box, the second switch is suitable for opening the second inlet and outlet, so that liquid flows between the filling cavity and the second pipeline through the second inlet and outlet and the second opening; or the second switch is suitable for closing the second inlet and outlet.

[0013] In some optional embodiments, the first pipeline and the first switch are respectively provided in two numbers, and the two first pipelines are arranged opposite to each other so that the first pipeline and the filling cavity on the corresponding side can be connected to or cut off from each other; and / or the penetration holes are respectively provided on the opposite sides of the wall frame corresponding to the operating cavity, and the second pipeline and the second switch are respectively provided in two numbers, and the two second pipelines are arranged opposite to each other.

[0014] In some optional embodiments, the permeable reaction wall for groundwater treatment further includes a guide structure, which is disposed at the bottom of the wall frame and is suitable for guiding liquid to the wall frame.

[0015] In some optional embodiments, the guide structure includes a curtain, and a water-facing surface of the curtain is provided with a plurality of grooves.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention makes the replacement of filling materials and the dredging of the wall more convenient and improves efficiency through the detachable connection design of the wall frame, the filling component and the operating component. The operating component is used to fill the necessary reagents into the filling component, so that the reaction wall is not easily blocked.

[0018] 2. The filling assembly consists of multiple detachably connected filling units, each of which can accommodate the reaction medium separately, thus enhancing the adaptability to sewage treatment, and can be quickly assembled, easily constructed, with various reaction modes, thus expanding the treatment range, and conveniently replacing only the clogged filling unit while other filling units can continue to be used, thus overcoming the defect that the existing reaction wall needs to be excavated and replaced as a whole for permeability repair and daily maintenance.

[0019] 3. The present invention provides an observation pipe that can be connected to the first pipeline, and groundwater can be pumped out through the observation pipe, thereby achieving the purpose of the invention of observing the groundwater level in the permeable reaction wall and collecting samples.

[0020] 4. The present invention can simultaneously meet the equipment requirements of chemical precipitation reaction grids, redox reaction grids, adsorption reaction grids, biodegradation reaction grids and other methods, while also providing a variety of maintenance and repair methods.

[0021] 5. The present invention can provide a weak acid, weak base or neutral environment by injecting solid or liquid reaction solution to fix the ions that pollute the water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a permeable reaction wall for groundwater treatment according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of a wall frame of a permeable reaction wall for groundwater treatment according to an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the assembly of the filling components of the permeable reaction wall for groundwater treatment according to one embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the split filling assembly of the permeable reaction wall for groundwater treatment according to one embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of a filler unit of a permeable reaction wall for groundwater treatment according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of a convex structure of a permeable reaction wall for groundwater treatment according to an embodiment of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of a filler unit of a permeable reaction wall for groundwater treatment according to an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of a convex structure of a permeable reaction wall for groundwater treatment according to an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of a permeable reaction wall for groundwater treatment according to another embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 110. Wall frame; 1101. Infiltration hole; 111. Filling cavity; 112. Operating cavity; 113. Window; 120. Filling assembly; 121. Filling unit; 1211. Filling skeleton; 1212. Protective net; 1213. Protruding structure; 1214. Lifting hole; 1215. Partition net; 130. Operating assembly; 131. Operating box; 1311. First inlet and outlet; 1312. Second inlet and outlet; 132. First pipeline; 133. First switch; 134. Observation tube; 135. Second pipeline; 136. Second switch; 140. Diversion structure. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The reaction wall used in the related art still has the following deficiencies in practical application:

[0038] 1. Aggregates and reagents are placed in underground aquifers. The composition of aquifers is relatively complex, and reagents are usually affected by the loss of related substances in the original stratum. Therefore, when designing the dosage of reagents, excessive dosage is usually considered. However, in most cases, it is affected by the uncertainty of the actual domestic investigation content or the specificity of local geological conditions, which affects the treatment effect.

[0039] 2. After the permeable reaction wall for groundwater treatment is installed, the daily monitoring means are single, basically sampling from the monitoring wells set up on both sides of the permeable reaction wall as monitoring facilities. In case of abnormal detection, there are almost no maintenance measures except excavation and re-layout.

[0040] 3. When the permeable reaction wall used for groundwater treatment is injected by well construction or rotary jet injection, it is easy to form an uneven barrier zone due to uneven permeability of the formation, and the rotary jet injection agent can only be injected once.

[0041] 4. After the blockage occurs, a dominant seepage channel for groundwater will be formed, which will increase the local loss of reagents and even cause short-circuit flow across the reaction wall, forming a pollution plume that spreads to the surrounding areas.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0044] like Figure 1 and Figure 2 As shown, according to an embodiment of the invention, a permeable reaction wall for groundwater treatment is provided, comprising: a wall frame 110, on which a filling cavity 111 and an operating cavity 112 which are interconnected are arranged in sequence and at intervals along the length direction, and the filling cavity 111 is provided with windows 113 on both sides of the thickness direction of the wall frame 110; a filling component 120, which is arranged in the filling cavity 111 and is detachably connected to the wall frame 110, and the filling component 120 is provided with a plurality of liquid permeable channels in the thickness direction of the wall frame 110, and the liquid permeable channels are connected to the pipe windows 113; an operating component 130, which is arranged in the operating cavity 112 and is detachably connected to the wall frame 110, and the operating component 130 is suitable for filling medicine into the filling component 120 or clearing the filling component 120 when the filling component 120 is blocked.

[0045] In this embodiment, the permeable reaction wall for groundwater treatment is installed as a whole in the groundwater, and mainly includes a wall frame 110 , a filling component 120 and an operating component 130 .

[0046] The wall frame 110 is made of high-strength, corrosion-resistant materials to ensure the stability and durability of the wall. The size and position of the wall frame 110 can be determined according to the actual situation of the groundwater treatment site. The installation of the wall frame 110 needs to ensure its stability to prevent the wall from shifting due to groundwater pressure or geological changes.

[0047] Continue to combine Figure 2As shown, the wall frame 110 includes two bottom beams, two top beams and three side panels, which constitute a cubic frame structure and form a chamber in the wall frame 110. Four partitions are arranged in the chamber, wherein two partitions are arranged at intervals from each other to form an operation chamber 112, and a filling chamber 111 is formed every time an operation chamber 112 is spaced apart. The filling chamber 111 and the operation chamber 112 are interconnected in the length direction of the wall frame 110, wherein windows 113 are arranged on opposite sides of the thickness direction of the wall frame 110 in the filling chamber 111 to form a water-permeable window 113. The side wall openings of the wall frame 110 are equipped with high-strength steel meshes, which can prevent impurities from entering the steel frame on the basis of providing the overall structural strength of the wall frame 110. This steel mesh is a multi-layer structure, with large mesh on the outside and small mesh on the inside.

[0048] like Figure 3 As shown, the filling assembly 120 is filled with a variety of reaction materials, such as activated carbon, iron powder, biological filler, etc., and the appropriate reaction material can be selected according to the type of groundwater pollution. The filling assembly 120 is detachably connected to the wall frame 110, so that the filling assembly 120 is convenient to replace when it is blocked or damaged in other forms. The permeable channel allows groundwater to flow smoothly through the filling assembly 120 and fully contact with the reaction material.

[0049] The operating assembly 130 is disposed in the operating cavity 112 and can also be detachably connected to the wall frame 110. The operating assembly 130 is used to fill the filling assembly 120 with necessary agents to enhance the water treatment effect, or to clear the filling assembly 120 when it is blocked, thereby ensuring the smooth operation of the system.

[0050] The detachable connection design of the wall frame 110, the filling assembly 120 and the operating assembly 130 makes the replacement of the filling material and the dredging of the wall more convenient, facilitates the operator to perform daily maintenance, reduces maintenance costs, and improves the removal efficiency of pollutants.

[0051] Sealing measures are provided between the filling assembly 120 and the operating assembly 130 and the wall frame 110, which can effectively prevent the formation of dominant seepage channels due to gaps and avoid the phenomenon that polluted water flows through without fully reacting with the reactive wall filler.

[0052] The permeable reaction wall can be unblocked or revived with reagents, and the filling assembly 120 can also be hoisted out and replaced as a whole, which saves cost and time while maximizing the effect of pollution remediation.

[0053] Furthermore, if Figure 4As shown, the filling assembly 120 includes a plurality of filling units 121 , which are overlapped in sequence in the height direction of the wall frame 110 , wherein each of the filling units 121 is provided with a plurality of liquid-permeable channels.

[0054] The filling assembly 120 is composed of a plurality of filling units 121, which are overlapped in sequence in the height direction of the wall frame 110 to form a continuous reaction area. Each filling unit 121 is an independent treatment unit with a complete structure and function, and can independently treat groundwater. By stacking a plurality of filling units 121, the filling assembly 120 can provide a larger treatment area and a longer treatment path, thereby improving the efficiency and effect of groundwater treatment.

[0055] Multiple packing units 121 are overlapped in sequence in the height direction of the wall frame 110, so that the packing units 121 form a detachable connection structure. Therefore, the replacement of the reaction medium and the maintenance of the packing units 121 are more convenient, which reduces the operating cost and prolongs the service life of the wall. Multiple packing units 121 can be filled with different aggregates to meet different needs. There are sealing measures between the filling component 120 and the operating component 130 and the wall frame 110, which can effectively prevent the dominant seepage channel caused by the gap and avoid the phenomenon that the polluted water flows through without fully reacting with the reaction wall filler.

[0056] Furthermore, if Figure 5 As shown, the packing unit 121 includes a packing skeleton 1211 and a protective net 1212. The packing skeleton 1211 and the protective net 1212 constitute a packing space, and the packing space is suitable for filling a reaction medium. The protective net 1212 constitutes a plurality of liquid-permeable channels.

[0057] In this embodiment, the packing unit 121 is mainly composed of a packing skeleton 1211 and a protective net 1212, which together construct a packing space for accommodating the reaction medium. The packing skeleton 1211 is the basic structure of the packing unit 121, which plays a supporting and fixing role. The packing skeleton 1211 can form a cubic structure. For example, the packing skeleton 1211 includes six vertical poles. The packing skeleton 1211 is usually made of high-strength, corrosion-resistant materials, such as stainless steel, engineering plastics, etc., to ensure long-term stable operation in the groundwater environment. The shape and size of the packing skeleton 1211 are determined according to the design of the filling cavity 111 of the wall frame 110 to achieve close fit and effective filling with the wall frame 110. The protective net 1212 is connected between two adjacent vertical poles to form a packing space. The permeable channel formed by the packing net improves the water permeability of the packing unit 121, so that groundwater can flow smoothly through the wall, avoiding the decrease in treatment efficiency caused by blockage. In the packing space, various reaction media, such as activated carbon, iron powder, biological filler, etc., can be filled. The reaction medium can react chemically or biodegrade with pollutants in the groundwater to remove the pollutants. Sewage can enter the packing space through the liquid permeable channel formed by the protective net 1212, ensuring the high efficiency of the packing unit 121 during the reaction process.

[0058] Furthermore, if Figure 5 and Figure 6 As shown, two adjacent packing skeletons 1211 have a concave structure and a convex structure 1213 that match each other, and the convex structure 1213 is provided with a hanging hole 1214; and / or at least one partition net 1215 is provided in the packing space to separate the packing space into multiple sub-spaces.

[0059] In this embodiment, a variety of overlapping modes can be used, and the selection of overlapping modes should take into account the convenience of installation, maintenance and replacement of the filler unit 121, as well as the structural stability and sealing of the wall frame 110. The plug-in mode is to design the upper or lower part of the filler unit 121 into a plug shape, and the corresponding position on the wall frame 110 is designed into a socket shape, and the filler unit 121 is overlapped by inserting the plug into the socket.

[0060] Specifically, the packing frame 1211 is provided with a groove or a lifting joint, and the lifting joint is a column structure, so that two adjacent packing units 121 can be plugged in through the groove and the column. Among them, the column is provided with a lifting hole 1214, and a bolt is inserted into the lifting hole 1214 to fix the two adjacent packing frames 1211.

[0061] When the packing units 121 are spliced, steel cables may be used to connect the hoisting holes 1214 at the hoisting joints for easy installation and movement.

[0062] Furthermore, if Figure 7As shown, the operation assembly 130 includes: an operation box 131, which is provided with a first inlet and outlet 1311; a first pipeline 131, which is provided at the top of the operation box 131, and the first pipeline 131 extends to the inside of the operation box 131, and a first opening is provided on the first pipeline 131, and the first opening is opposite to the first inlet and outlet 1311, so that the first opening and the first inlet and outlet 1311 are connected to each other; a first switch 133, which is provided at the top of the operation box 131, and the first switch 133 is suitable for opening the first inlet and outlet 1311, so that the liquid flows between the filling cavity 111 and the first pipeline 131 through the first inlet and outlet 1311 and the first opening; or the first switch 133 is suitable for closing the first inlet and outlet 1311. The operation box 131 is a closed box.

[0063] In this embodiment, the operating assembly 130 mainly includes an operating box 131, a first pipeline 131 and a first switch 133. The operating box 131 includes two first side panels and two second side panels, the two first side panels are arranged opposite to each other, the two second side panels are arranged opposite to each other, and the two first side panels and the two second side panels are connected to each other to form a closed body structure. The first side panel and the second side panel are both provided with a first inlet and outlet 1311, and the first inlet and outlet 1311 are sequentially arranged in a plurality in the height direction of the operating box 131. Similarly, a plurality of first openings may be arranged on the first pipeline 131, and the plurality of first openings and the plurality of first inlet and outlet 1311 are arranged one by one in correspondence, so that the liquid can flow out from the first opening of the first pipeline 131 and then enter the first inlet and outlet 1311; or the liquid can enter the first pipeline 131 from the first inlet and outlet 1311 and the first opening. Among them, the first switch 133 can open or close the first opening, so that the liquid path between the first opening and the first pipeline 131 is opened or closed.

[0064] The first opening is arranged toward the filling chamber 111, so the filling chamber 111 can be filled with medicine through the first pipeline 131, which improves efficiency. High-pressure gas or liquid can also be input into the filling chamber 111 through the first pipeline 131 to flush the seepage channels blocked by reaction deposition between aggregates, so as to fill the dominant channel in the filling chamber 111 and avoid polluted water passing through the reaction wall through the dominant seepage channel. The first pipeline 131 can also be used to extract the injected high-pressure water, high-pressure gas and remove pollutants. The components are unblocked to avoid blockage of the filling component 120, which can prevent or improve the formation of groundwater.

[0065] The main active material of the permeable reaction wall can be filled through the filling component 120, or formed by the material injected through the first pipeline 131. The staged and fixed-point injection through the first pipeline 131 can improve the effective reaction concentration of the reaction zone reagent, extend the life of the reaction zone, and overcome the defects that the uneven permeability of the formation during well construction injection leads to uneven reagents and uneven reaction zones, and the rotary injection reagent can only be injected once.

[0066] The active body filled in the filling component 120 can be formed or restored to activity by the material injected through the first pipeline 131, or a drug for adjusting the chemical environment can be injected to increase the service life of the permeable reaction wall.

[0067] When the filler is clogged, the following measures can be taken depending on the situation: high-pressure water or high-pressure gas is injected through the first pipeline 131 on one side, and high-pressure water or high-pressure gas is extracted from the first pipeline 131 on the other side, so that the clogged passage can be cleared. If the blockage is serious, the blocked filling assembly 120 can be lifted out, replaced with a new filler, and then put back.

[0068] Further, continue to combine Figure 7 As shown, the operating component 130 also includes an observation tube 134, which is disposed at the top of the operating box 131. The observation tube 134 extends to the interior of the operating box 131 and is provided with an opening connected to the first pipeline 131 so that the liquid entering the first pipeline 131 enters the observation tube 134.

[0069] In this embodiment, when groundwater enters the first pipeline 131 through the first inlet and outlet 1311, since the observation tube 134 is provided with an opening connected to the first pipeline 131, part of the liquid can flow into the observation tube 134 through the opening. The operator can visually monitor and check the flow of the liquid through the observation tube 134, and can also extract groundwater through the observation tube 134 to observe the groundwater level in the permeable reaction wall and collect samples.

[0070] During daily monitoring, the first inlet and outlet 1311 is opened by operating the first switch 133, so that it can be connected to the underground water layer of the reaction wall. Through the observation pipe 134, a groundwater extraction test or precipitation test or simple observation can be performed, and daily monitoring can be performed intuitively and efficiently. Through a certain frequency of observation, groundwater samples in the wall are collected and analyzed to determine the energy efficiency of the reaction wall.

[0071] In addition, depending on the specific type of reagent added to the permeable reaction wall body, the reagent can be revived by injecting reagents that are easy to form deposits and packages in the aggregate, or by injecting reagents that adjust and maintain the geophysical and chemical environment of the reaction wall, thereby increasing the life of the reaction wall reagents.

[0072] Furthermore, a penetration hole 1101 is provided on the wall frame 110 corresponding to the operation cavity 112, and a second inlet and outlet 1312 is provided on the operation box 131. The second inlet and outlet 1312 is arranged opposite to the penetration hole 1101, and the second inlet and outlet 1312 and the first inlet and outlet 1311 are arranged on different sides of the operation box 131. The operation component 130 also includes: a second pipeline 135, which is arranged at the top of the operation box 131, and the second pipeline 135 extends to the inside of the operation box 131. The second pipeline 135 is provided with a second opening, and the second opening is opposite to the second inlet and outlet 1312, so that the second opening and the second inlet and outlet 1312 are connected to each other; a second switch 136, which is arranged at the top of the operation box 131, and the second switch 136 is suitable for opening the second inlet and outlet 1312, so that the liquid flows between the filling cavity 111 and the second pipeline 135 through the second inlet and outlet 1312 and the second opening; or the second switch 136 is suitable for closing the second inlet and outlet 1312.

[0073] In this embodiment, the penetration holes 1101 are relatively arranged in the thickness direction of the wall frame 110. When the operating component 130 is installed, the second inlet and outlet 1312 faces the penetration hole 1101, ensuring that the liquid or gas can smoothly flow into or out of the second pipeline 135 from the wall penetration hole 1101. In order to control the flow of liquid or gas, the top of the operating box 131 is also equipped with a second switch 136. The function of the second switch 136 is to open or close the second inlet and outlet 1312, thereby controlling the liquid or gas in and out of the second pipeline 135. When the second switch 136 is in an open state, the liquid or gas can flow freely through the second inlet and outlet 1312 and the second opening; and when the second switch 136 is in a closed state, the flow of liquid or gas can be effectively prevented.

[0074] Specifically, the second inlet and outlet 1312 corresponds to the permeable hole 1101 of the wall frame 110, and high-pressure water or high-pressure gas can be injected through the second pipeline 135 for hydraulic fracturing or pumping. After the permeable reaction wall is installed, high-pressure water can be injected through the second pipeline 135 and the second inlet and outlet 1312. The high-pressure water enters the soil layer through the permeable hole 1101, flushes the original cracks to increase them, and creates new cracks at low permeability, so that groundwater flows more smoothly to the permeable reaction wall. At the same time, during the impact process of the high-pressure water, the pollutants adsorbed on the original soil layer are dissolved in water after being impacted, and then flow to the permeable reaction wall, thereby increasing the removal rate of pollutants and improving the removal efficiency of pollutants.

[0075] A filler with low permeability such as bentonite can be optionally filled in the filling assembly 120 to turn the permeable reaction wall into a non-permeable retaining wall, and then the second inlet and outlet 1312 on the water-facing side is unscrewed, and the pump is connected to the second pipeline 135 to extract groundwater. After the extraction process is completed, the filling assembly 120 is hoisted out, and the filler is replaced, and the function is restored to the permeable reaction wall.

[0076] Furthermore, the first pipeline 131 and the first switch 133 are respectively set to two, and the two first pipelines 131 are arranged opposite to each other, so that the first pipeline 131 and the filling cavity 111 on the corresponding side can be connected or cut off from each other; and / or the opposite sides of the wall frame 110 corresponding to the operating cavity 112 are respectively provided with penetration holes 1101, and the second pipeline 135 and the second switch 136 are respectively set to two, and the two second pipelines 135 are arranged opposite to each other.

[0077] In this embodiment, the first pipeline 131 and the second pipeline 135 can be set as two and arranged opposite to each other, so as to achieve the purpose of flexibly controlling the flow path of the fluid, thereby improving the operating efficiency and reliability of the system and improving the overall performance and safety.

[0078] Correspondingly, two first inlets 1311 and two second inlets 1312 are respectively provided, and the two first inlets 1311 are arranged opposite to each other, and the two second inlets 1312 are arranged opposite to each other, and anti-blocking screens are arranged inside the first inlet 1311 and the second inlet 1312. An anti-blocking screen is arranged inside the permeation hole 1101.

[0079] Furthermore, if Figure 8 As shown, the permeable reaction wall for groundwater treatment further includes a guide structure 140 , which is disposed at the bottom of the wall frame 110 . The guide structure 140 is suitable for guiding liquid to the wall frame 110 .

[0080] In this embodiment, the permeable reaction wall for groundwater treatment has a flow guide structure 140 arranged in the bottom area of ​​the wall frame 110, and its main function is to effectively guide the liquid and evenly distribute it to various parts of the wall frame 110. Therefore, it can be ensured that the liquid can fully contact with the reaction material in the wall when passing through the wall, thereby improving the treatment efficiency and purification effect.

[0081] Furthermore, the guide structure 140 includes a curtain, and a water-facing surface of the curtain is provided with a plurality of grooves.

[0082] Understandably, the curtain is L-shaped, connected to the bottom of the wall frame 110, and the water-facing surface of the curtain is located below the wall frame 110. Arranging a plurality of grooves on the water-facing surface not only helps to disperse the water flow and reduce the direct impact of the water flow on the curtain, but also effectively controls the path of the water flow, ensuring that the water flow flows to the filling assembly 120 arranged in the wall frame 110 according to a predetermined trajectory.

[0083] The curtain can also be flexibly equipped with pile rows, steel sheet piles and other methods according to the site conditions.

[0084] When groundwater has a seepage channel under the weakly weathered layer, the water flow can be intercepted by the grooves set on the water-facing surface of the curtain, so that the water flow flows upward and enters the permeable reaction wall for treatment.

[0085] The present invention can also simultaneously meet the equipment requirements of chemical precipitation reaction grids, redox reaction grids, adsorption reaction grids, biodegradation reaction grids and other methods, and at the same time has a variety of maintenance and repair methods, solving the problem that the existing permeable reaction wall needs to be completely excavated and replaced for permeability repair and daily maintenance.

[0086] Obviously, the above embodiments are merely examples for clear description and are not limitations of the implementation methods.

[0087] For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived from this are still within the protection scope of the invention.

Claims

1. A permeable reaction wall for groundwater treatment, characterized in that: include: The wall frame is provided with a filling cavity and an operation cavity which are interconnected and arranged in sequence along the length direction, and the filling cavity is provided with windows on both sides of the wall frame in the thickness direction; A filling assembly, arranged in the filling cavity and detachably connected to the wall frame, wherein the filling assembly is provided with a plurality of liquid permeable channels in the thickness direction of the wall frame, and the liquid permeable channels are connected to the window; An operating component is arranged in the operating cavity and is detachably connected to the wall frame. The operating component is suitable for filling medicine into the filling component or clearing the filling component when the filling component is blocked.

2. The permeable reaction wall for groundwater treatment according to claim 1, characterized in that: The filling assembly comprises a plurality of filling units, which are overlapped in sequence in the height direction of the wall frame, wherein each of the filling units is provided with the plurality of liquid-permeable channels.

3. The permeable reaction wall for groundwater treatment according to claim 2, characterized in that: The packing unit comprises a packing skeleton and a protective net, wherein the packing skeleton and the protective net constitute a packing space, wherein the packing space is suitable for filling a reaction medium, and the protective net constitutes a plurality of liquid-permeable channels.

4. The permeable reaction wall for groundwater treatment according to claim 3, characterized in that: Two adjacent packing skeletons have a concave structure and a convex structure that match each other, and the convex structure is provided with a hanging hole; and / or at least one partition net is provided in the packing space to separate the packing space into a plurality of subspaces.

5. The permeable reaction wall for groundwater treatment according to any one of claims 1 to 4, characterized in that: The operating components include: An operation box having a first inlet and outlet; A first pipeline is provided at the top of the operation box, the first pipeline extends to the interior of the operation box, a first opening is provided on the first pipeline, the first opening is opposite to the first inlet and outlet, so that the first opening and the first inlet and outlet are connected to each other; The first switch is arranged on the top of the operation box, and the first switch is suitable for opening the first inlet and outlet so that the liquid flows between the filling cavity and the first pipeline through the first inlet and outlet and the first opening; or the first switch is suitable for closing the first inlet and outlet.

6. The permeable reaction wall for groundwater treatment according to claim 5, characterized in that: The operating assembly also includes an observation tube, which is arranged on the top of the operating box. The observation tube extends to the interior of the operating box and is provided with an opening connected to the first pipeline, so that the liquid entering the first pipeline enters the observation tube.

7. The permeable reaction wall for groundwater treatment according to claim 5, characterized in that: The wall frame corresponding to the operation cavity is provided with a penetration hole, the operation box is provided with a second inlet and outlet, the second inlet and outlet are arranged opposite to the penetration hole, and the second inlet and outlet are arranged on different sides of the operation box as the first inlet and outlet, and the operation component further includes: A second pipeline is provided at the top of the operation box, the second pipeline extends to the interior of the operation box, a second opening is provided on the second pipeline, the second opening is opposite to the second inlet and outlet, so that the second opening and the second inlet and outlet are connected to each other; The second switch is arranged on the top of the operation box, and the second switch is suitable for opening the second inlet and outlet so that the liquid flows between the filling cavity and the second pipeline through the second inlet and outlet and the second opening; or the second switch is suitable for closing the second inlet and outlet.

8. The permeable reaction wall for groundwater treatment according to claim 7, characterized in that: The number of the first pipeline and the number of the first switch are respectively two, and the two first pipelines are arranged opposite to each other, so that the first pipeline and the filling cavity on the corresponding side can be connected or cut off from each other; and / or the penetration holes are respectively provided on the opposite sides of the wall frame corresponding to the operating cavity, and the number of the second pipeline and the number of the second switch are respectively two, and the two second pipelines are arranged opposite to each other.

9. The permeable reaction wall for groundwater treatment according to any one of claims 1 to 5, characterized in that: The permeable reaction wall for groundwater treatment further comprises a flow guiding structure, which is arranged at the bottom of the wall frame and is suitable for guiding liquid to the wall frame.

10. The permeable reaction wall for groundwater treatment according to claim 9, characterized in that: The diversion structure comprises a curtain, and a water-facing surface of the curtain is provided with a plurality of grooves.

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