Soil heavy metal pollution in-situ remediation passivation barrier structure

Abstract

The utility model discloses an in-situ remediation passivation barrier structure for soil heavy metal pollution, which relates to the technical field of soil remediation and comprises a barrier plate. A plurality of grouting pipes are arranged on the surface of the baffle and evenly arranged, positioning columns are arranged at the lower ends of the grouting pipes, the front ends of the positioning columns are conical, grout inlets are formed in the surfaces of the front ends of the grouting pipes, limiting strips are arranged on the surfaces of the two sides of the grouting pipes, and the inclination angle between the limiting strips and the grouting pipes is 90 degrees. Compared with an existing common soil heavy metal pollution in-situ remediation, passivation and blocking structure, the soil heavy metal pollution in-situ remediation, passivation and blocking structure has the advantages that the blocking plate can be positioned and mounted in polluted soil through the arrangement of the positioning nails, so that the soil heavy metal pollution in-situ remediation, passivation and blocking structure is simple in structure, convenient to use and high in practicability. And through the arrangement of the limiting strips, the blocking plates can be firmly limited in the contaminated soil, and the contaminated soil is prevented from permeating into the contaminated soil.

Description

Technical Field

[0001] The utility model relates to the technical field of soil remediation, in particular to an in-situ remediation passivation barrier structure for heavy metal pollution in soil. Background Art

[0002] At present, with the development of the chemical industry, heavy metal contaminated soil not only affects the growth of green plants, but also pollutes the surrounding rivers and causes serious damage to the ecology. Therefore, for heavy metal contaminated soil, it is necessary to use in-situ passivation remediation technology to repair the heavy metal soil. It is based on adding exogenous remediation agents, reacting with heavy metals in a series of ways, changing the occurrence form of heavy metals in the soil, and reducing its mobility and biological effectiveness in the soil. When repairing heavy metal contaminated soil, it is necessary to use a barrier structure to block the heavy metal soil to prevent heavy metal substances from causing secondary pollution to other soils.

[0003] For example, the patent document with application number 202321045057.4 discloses a passivation barrier structure for in-situ remediation of heavy metal pollution in soil, and the utility model discloses a passivation barrier structure for in-situ remediation of heavy metal pollution in soil, which belongs to the field of soil remediation technology, including contaminated soil, the inner wall of the groove opened in the contaminated soil is paved with a barrier layer, the surface of the barrier layer is provided with an anti-permeability layer, the top of the anti-permeability layer is provided with a drainage layer, the top of the drainage layer is provided with a planting area, a water replenishment structure is provided on one side of the drainage layer, the water replenishment structure includes a water storage tank, and the water storage tank is provided on one side of the drainage layer. The utility model can not only have a barrier effect on heavy metal contaminated soil, prevent the diffusion of heavy metal substances and the impact on surrounding soil, but also collect and reuse the water discharged from the soil, avoid water waste, ensure the continuous growth of green plants, and at the same time, prevent a small amount of heavy metal substances remaining in the water from polluting other soils again. However, the existing barrier layer of the in-situ repair passivation barrier structure of soil heavy metal pollution will be damaged after long-term use due to uncertain factors such as geological changes, causing the contaminated soil to penetrate into the interior of the planting layer and pollute the soil.

[0004] Therefore, in view of this, the shortcomings of the existing structure were studied and improved, and a passivation barrier structure for in-situ remediation of soil heavy metal pollution was proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a soil heavy metal pollution in-situ remediation passivation barrier structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a passivation barrier structure for in-situ remediation of heavy metal pollution in soil, comprising a barrier plate, a plurality of grouting pipes are arranged on the surface of the barrier plate, and the grouting pipes are evenly arranged, a positioning column is arranged at the lower end of the grouting pipe, and the front end of the positioning column is conical, a slurry inlet is provided on the front end surface of the grouting pipe, and limit strips are provided on both side surfaces of the grouting pipe, and the inclination angle between the limit strip and the grouting pipe is degrees, a slurry outlet is provided on the front end surface of the limit strip, and the slurry outlet is connected to the slurry inlet.

[0007] Preferably, an anti-permeability layer is provided at the bottom of the barrier plate, and a drainage layer is provided at the upper end of the anti-permeability layer.

[0008] Preferably, a planting layer is provided at the upper end of the drainage layer, and a water storage tank is provided on the surface of the planting layer.

[0009] Preferably, a sedimentation box is provided at the front end of the drainage layer, and a filter barrel is provided at the upper end of the sedimentation box.

[0010] Preferably, a water pump is provided at the upper end of the filter barrel, and a drain pipe is provided at the output end of the water pump.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model provides a barrier plate, a grouting pipe, a positioning column, a grouting inlet, a limit strip and a grouting outlet. The positioning column can be used to position the barrier plate inside the contaminated soil. The grouting pipe and the grouting inlet can be used to pour concrete into the grouting pipe after the barrier plate is installed, so as to ensure that the barrier plate is more firmly fixed.

[0013] 2. The utility model can collect rainwater in rainy weather and reduce the infiltration of rainwater into the polluted land through the arrangement of an anti-seepage layer, a drainage layer, a planting layer, a sedimentation box, a filter barrel, a water pump, a drainage pipe and a water storage tank. At the same time, water resources can be provided for the growth of plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the fixing device of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the purification device of the utility model.

[0017] In the figure: 1. barrier plate; 2. grouting pipe; 201. positioning column; 202. slurry inlet; 203. limiting strip; 204. slurry outlet; 3. anti-seepage layer; 301. drainage layer; 302. planting layer; 4. sedimentation box; 401. filter barrel; 402. water pump; 403. drainage pipe; 404. water storage tank. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-Figure 2 As shown, a passivation barrier structure for in-situ remediation of heavy metal pollution in soil includes a barrier plate 1, a plurality of grouting pipes 2 are arranged on the surface of the barrier plate 1, and the grouting pipes 2 are evenly arranged, a positioning column 201 is arranged at the lower end of the grouting pipe 2, and the front end of the positioning column 201 is conical. The advantage of this arrangement is that through the arrangement of the positioning column 201, the barrier plate 1 can be positioned and installed inside the contaminated soil to avoid the infiltration of the contaminated soil.

[0020] Furthermore, a grouting port 202 is provided on the front end surface of the grouting pipe 2, and limit strips 203 are provided on both side surfaces of the grouting pipe 2, and the inclination angle between the limit strips 203 and the grouting pipe 2 is 45 degrees. The advantage of this arrangement is that, through the arrangement of the grouting pipe 2 and the grouting port 202, concrete can be poured into the grouting pipe 2 after the installation of the baffle plate 1 is completed, thereby ensuring that the baffle plate 1 is fixed more firmly.

[0021] Furthermore, a slurry outlet 204 is provided on the front end surface of the limiting strip 203 , and the slurry outlet 204 is connected to the slurry inlet 202 . The advantage of this arrangement is that it ensures that concrete enters from the slurry inlet 202 and flows out from the slurry outlet 204 .

[0022] like Figure 3 As shown, an anti-permeability layer 3 is provided at the bottom of the barrier plate 1, and a drainage layer 301 is provided at the upper end of the anti-permeability layer 3. This arrangement is an existing device and will not be described in detail.

[0023] Furthermore, a planting layer 302 is provided at the upper end of the drainage layer 301, and a water storage tank 404 is provided on the surface of the planting layer 302. The advantage of this arrangement is that, through the arrangement of the water storage tank 404, rainwater can be collected during rainy weather to reduce the infiltration of rainwater into the polluted land, and at the same time, water resources can be provided for the growth of plants.

[0024] Furthermore, a sedimentation box 4 is provided at the front end of the drainage layer 301, and a filter barrel 401 is provided at the upper end of the sedimentation box 4, a water pump 402 is provided at the upper end of the filter barrel 401, and a drainage pipe 403 is provided at the output end of the water pump 402. The advantage of this arrangement is that, through the arrangement of the water pump 402, the precipitated polluted water can be filtered through the filter barrel 401 and then sent into the water storage tank 404.

[0025] Working principle: When using the in-situ remediation passivation barrier structure for heavy metal pollution in soil, first, insert the barrier plate 1 with the grouting pipe 2 into the surface of the contaminated soil through the positioning column 201, pour concrete through the grout inlet 202, and then discharge it from the grout outlet 204 of the limit bar 203, fix the barrier plate 1 inside the contaminated soil, and when it rains, the water storage tank 404 collects rainwater, and the uncollected rainwater enters the drainage layer 301 and then enters the sedimentation box 4 for sedimentation. When it is needed, start the pump 402 to filter the water inside the sedimentation box 4 through the filter barrel 401 and then send it to the inside of the water storage tank 404 through the drainage pipe 403. This is the working principle of the in-situ remediation passivation barrier structure for heavy metal pollution in soil.

Claims

1. A soil heavy metal pollution in-situ remediation passivation barrier structure, comprising a barrier plate (1), characterized in that: A plurality of grouting pipes (2) are arranged on the surface of the baffle plate (1), and the grouting pipes (2) are evenly arranged. A positioning column (201) is arranged at the lower end of the grouting pipe (2), and the front end of the positioning column (201) is conical. A grouting inlet (202) is provided on the front end surface of the grouting pipe (2), and limiting strips (203) are provided on both side surfaces of the grouting pipe (2), and the inclination angle between the limiting strips (203) and the grouting pipe (2) is 45 degrees. A grouting outlet (204) is provided on the front end surface of the limiting strip (203), and the grouting outlet (204) is connected to the grouting inlet (202).

2. The in-situ remediation passivation barrier structure for heavy metal pollution in soil according to claim 1, characterized in that: An anti-permeability layer (3) is provided at the bottom of the barrier plate (1), and a drainage layer (301) is provided at the upper end of the anti-permeability layer (3).

3. The in-situ remediation passivation barrier structure for heavy metal pollution in soil according to claim 2, characterized in that: A planting layer (302) is provided at the upper end of the drainage layer (301), and a water storage tank (404) is provided on the surface of the planting layer (302).

4. The in-situ remediation passivation barrier structure for heavy metal pollution in soil according to claim 2, characterized in that: A sedimentation box (4) is provided at the front end of the drainage layer (301), and a filter barrel (401) is provided at the upper end of the sedimentation box (4).

5. The in-situ remediation passivation barrier structure for heavy metal pollution in soil according to claim 4, characterized in that: A water pump (402) is provided at the upper end of the filter barrel (401), and a drainage pipe (403) is provided at the output end of the water pump (402).

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