CN212329246U

CN212329246U - Device for restoring polluted soil and underground water through in-situ aeration

Info

Publication number: CN212329246U
Application number: CN202020698262.0U
Authority: CN
Inventors: 刘军; 赵坤; 潘运舟; 宫建瑞; 蔡琳琳; 戴昕
Original assignee: Nanjing Wondux Environmental Protection Technology Co ltd
Current assignee: Nanjing Wondux Environmental Protection Technology Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-01-12
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a device for restoring polluted soil and underground water by in-situ aeration, which comprises an in-situ injection system and an in-situ aeration system; the in-situ injection system comprises a medicine injection pipeline, a medicine box and a pressure pump; the medicine injection pipeline is inserted into the polluted soil or underground water; the medicine injection pipeline is communicated with the medicine box; the pressure pump is arranged on the medicine injection pipeline and pumps the medicine into the polluted soil and underground water from the medicine tank; the in-situ aeration system comprises a plastic drainage plate, an air compressor and a gas injection pipeline; the air compressor is connected with a plurality of plastic drainage plates through gas injection pipelines. The device of normal position aeration restoration contaminated soil and groundwater of this application adopts aeration and injection interval to set up to adopt the plastics drain bar to aerate, can be applicable to the soil layer of different properties, the treatment range is wider.

Description

Device for restoring polluted soil and underground water through in-situ aeration

Technical Field

The utility model relates to a pollute soil and groundwater restoration field, especially relate to a device of normal position aeration restoration polluted soil and groundwater.

Background

With the acceleration of the urbanization process, the removal, the production halt and the closure of industrial enterprises such as chemical plants, pesticide plants, petroleum enterprises and the like leave a large number of various and complex polluted fields, bring great environmental and health risks and obstruct the urban construction and the local economic development.

At present, the commonly used restoration technology comprises chemical oxidation and thermal desorption restoration technology. The thermal desorption technology has high energy consumption and high treatment cost. The chemical oxidation agent has large addition amount, the agent residue is easy to cause secondary pollution, and in addition, the oxidation effect is greatly reduced due to the strong cohesive force of clay and silt.

Existing in situ contaminated soil and groundwater remediation includes the combination of an injection unit and a power unit for agitating the chemicals and powering an injection pump. The device is suitable for injecting various medicaments such as oxidation medicaments, reduction medicaments, biological medicaments and the like in different forms, but does not provide aeration, and has the defect of treatment modes with high requirements on oxygen content of the oxidation medicaments, the biological medicaments and the like. For example, Chinese patent: CN210121611U A is used for prosthetic injection system in situ of soil and groundwater, it includes box, medicament storage jar, injection unit and power pack; the medicament storage tank is arranged in the box body, and the upper part of the medicament storage tank is provided with a solid medicament adding port and a liquid medicament adding port; a repairing agent outlet is arranged at the lower part of the agent storage tank; a stirrer is arranged inside the medicament storage tank and connected with the stirrer; the injection unit includes: a plurality of injection pumps and a medicament main pipeline are positioned in the box body; the main medicament pipeline is connected with a repair medicament outlet of the medicament storage tank; the feed inlet of each injection pump is connected with the main medicament pipeline through a branch pipeline in front of the pump; the discharge hole of each injection pump is connected with a pump rear pipeline; a main pipeline control valve is arranged at a repaired medicament outlet of the medicament storage tank; a branch pipeline control valve is arranged on each pump front branch pipeline; a flow meter and a pressure gauge are arranged on a rear pipeline of each pump; the power unit includes: an air compressor, an air storage tank and a gas transmission pipeline which are positioned in the box body; the air compressor is connected with the air storage tank and used for providing compressed air into the air storage tank; the air transmission pipeline is respectively connected with the air storage tank and the air inlet of each injection pump and is used for providing compressed air in the air storage tank for the injection pump to be used as a power source of the injection pump. It can be seen that the patent does not provide an aeration system, and the treatment modes with higher requirements on oxygen content, such as oxidation agents, biological agents and the like, have the problems of low treatment efficiency, long treatment period, high comprehensive cost and the like.

Disclosure of Invention

The utility model aims to solve the problem that to the shortcoming among the above-mentioned prior art, put forward improvement scheme or alternative, especially an improvement or alternative that improves the treatment effeciency, enlarges application scope.

In order to solve the above problem, the utility model discloses a scheme as follows: the device for restoring polluted soil and underground water by in-situ aeration is characterized by comprising an in-situ injection system and an in-situ aeration system; the in-situ injection system comprises a medicine injection pipeline, a medicine box and a pressure pump; the medicine injection pipeline is inserted into the polluted soil or underground water; the medicine injection pipeline is communicated with the medicine box; the pressure pump is arranged on the medicine injection pipeline and pumps the medicine into the polluted soil and underground water from the medicine tank; the in-situ aeration system comprises a plastic drainage plate, an air compressor and a gas injection pipeline; the air compressor is connected with the plurality of plastic drainage plates through gas injection pipelines; the medicine injection pipeline is arranged around the plastic drainage plate.

Further, according to the device for in-situ aeration remediation of polluted soil and underground water in the design scheme, the device is characterized in that a plurality of agent nozzles are arranged on the agent injection pipeline.

Further, according to the device for in-situ aeration remediation of polluted soil and underground water in the design scheme, the device is characterized in that a valve and a liquid flow meter are arranged on the medicine injection pipeline.

Further, according to the device for restoring polluted soil and underground water by in-situ aeration in the design scheme, the plastic drainage plate is a high-pressure polyethylene core plate.

Further, according to the above design scheme, the device for in-situ aeration remediation of contaminated soil and groundwater is characterized in that a pressure sensor is arranged on the gas injection pipeline, and the pressure sensor is used for displaying the gas pressure in the gas injection pipeline.

Further, according to the device for in-situ aeration remediation of contaminated soil and underground water in the design scheme, the drug injection pipelines are arranged in a square shape in the contaminated soil or underground water.

Aiming at the defects of the prior art, the invention provides a system for repairing polluted soil and underground water by in-situ aeration. Compared with the conventional technology, the microbial remediation technology has the advantages of low cost, no secondary pollution, no damage to the soil structure and the like. Decomposition of the pollutants can be accelerated by aeration. Improving the microbial repair efficiency. The conventional aeration well is mostly suitable for soil layers with good permeability, the plastic drainage plate has good strength and ductility, the plastic drainage plate is used for replacing the traditional aeration well, and the plastic drainage plate can be applied to clay, silt and mucky soil layers with poor permeability and has wide application range.

The technical effects of the utility model are as follows: 1. the conventional aeration well is suitable for sand layer soil with better permeability, while the soil in China is mostly clay layer or silt layer, the effect is poor, the plastic drainage plate is adopted to replace the traditional aeration well, the plastic drainage plate has good strength and ductility, the air circulation in the clay layer or the silt layer can be increased, the aeration well is suitable for soil layers with different properties, and the treatment range is wider.

2. Utilize the pollutant of aerobic microorganism degradation soil and groundwater, provide oxygen for the microorganism through the aeration, then accelerated the degradation rate of microorganism, improved the restoration effect.

3. The repairing technology avoids the damage to the original soil structure, has no secondary pollution and is low in cost.

Drawings

FIG. 1 is a schematic structural diagram of a system for in-situ aeration remediation of contaminated soil and groundwater.

FIG. 2 is a schematic diagram of the arrangement of the injection well and the gas injection well.

Wherein, 1: medicine injection pipeline, 2: chemical nozzle, 3: gas injection pipeline, 4: liquid flowmeter, 5: pressure pump, 6: chemical tank, 7: plastic drain board, 8: gas injection pipe, 9: pressure sensor, 10: air compressor, 11: and (4) a valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in the present invention can be understood in specific cases by those skilled in the art.

A device for restoring polluted soil and underground water by in-situ aeration comprises an in-situ injection system and an in-situ aeration system; the in-situ injection system comprises a medicine injection pipeline, a medicine box and a pressure pump; the medicine injection pipeline is inserted into the polluted soil or underground water; the medicine injection pipeline is communicated with the medicine box; the pressure pump is arranged on the medicine injection pipeline and pumps the medicine into the polluted soil and underground water from the medicine tank; the in-situ aeration system comprises a plastic drainage plate, an air compressor and a gas injection pipeline; the air compressor is connected with the plurality of plastic drainage plates through gas injection pipelines; the medicine injection pipeline is arranged around the plastic drainage plate.

A system for in-situ aeration remediation of polluted soil and underground water comprises an in-situ injection system and an in-situ aeration system; the in-situ implantation system comprises: the medicine injection well, a medicine injection pipeline, a medicine box and a pressure pump. The pressure pump is connected with a plurality of injection wells through injection pipelines; the in-situ aeration system comprises: plastic drain bar, air compressor, gas injection pipeline. The air compressor is connected with the plurality of plastic drainage plates through the gas injection pipeline; the periphery of a well pipe in a polluted area of the medicine injection well is provided with openings, and the aperture is 40-70 mm; a valve and a liquid flowmeter are arranged on the medicine injection pipeline; the gas injection pipeline is provided with a pressure sensor, and the pressure sensor is used for displaying the gas pressure in the gas injection pipeline; the plastic drainage plate is a high-pressure polyethylene core plate; the in-situ injection agent is an aerobic microbial agent, and the addition amount of the aerobic microbial agent is 2-5% of the volume of the soil to be treated; the aeration mode is a pulse type air supply mode, and the aeration rate is 20-50 mL/min; the injection wells are arranged in a square shape and are spaced at intervals of 1-3 m. The aeration plastic drainage plate is positioned in the center of the square; the pollutants are one or more of petroleum hydrocarbon, organic chlorine and polycyclic aromatic hydrocarbon pollution.

The specific implementation mode is as follows:

i. determining the pollution range and depth of the field, and knowing the distribution condition of soil layers of the field;

measuring and setting out, and determining the plane arrangement of the injection well and the aeration well;

thirdly, drilling medicine injection wells in the polluted area by using a drilling machine, connecting each medicine injection well with a medicine injection pipeline, connecting the medicine injection pipelines with a chemical box, and sequentially connecting a valve, a liquid flowmeter and a pressure pump, wherein the well depth reaches the polluted soil and the underground water layer;

iv, pumping aeration plastic drainage plates into the polluted area by using a drilling machine, wherein the well depth reaches the polluted soil and underground water layer, each aeration plastic drainage plate is connected with a gas injection pipeline, and an air compressor and a gas flowmeter are connected with the gas injection pipeline;

v, placing the microbial inoculum cultured in advance in a reagent box, starting a pressure pump, and injecting the microbial inoculum with certain mass concentration into a reagent injection well, wherein the addition amount is 2-5% of the volume of the soil to be treated;

vi, starting an air compressor, aerating the polluted soil by using a plastic drainage plate, improving the oxygen content of a polluted area, and accelerating the degradation of the pollutants by microorganisms;

and vii, decomposing the pollutants under the combined repairing technology of the microorganisms and the aeration to reach the repairing target value.

Claims

1. The device for restoring polluted soil and underground water by in-situ aeration is characterized by comprising an in-situ injection system and an in-situ aeration system; the in-situ injection system comprises a medicine injection pipeline, a medicine box and a pressure pump; the medicine injection pipeline is inserted into the polluted soil or underground water; the medicine injection pipeline is communicated with the medicine box; the pressure pump is arranged on the medicine injection pipeline and pumps the medicine into the polluted soil and underground water from the medicine tank; the in-situ aeration system comprises a plastic drainage plate, an air compressor and a gas injection pipeline; the air compressor is connected with the plurality of plastic drainage plates through gas injection pipelines; the medicine injection pipeline is arranged around the plastic drainage plate.

2. The in-situ aeration polluted soil and groundwater remediation device of claim 1, wherein the injection pipeline is provided with a plurality of agent nozzles.

3. The in-situ aeration polluted soil and groundwater remediation device of claim 1, wherein the drug injection pipeline is provided with a valve and a liquid flow meter.

4. The in-situ aeration polluted soil and groundwater remediation device of claim 1, wherein the plastic drainage plate is a high-pressure polyethylene core plate.

5. The in-situ aeration polluted soil and underground water remediation device according to claim 1, wherein the gas injection pipeline is provided with a pressure sensor, and the pressure sensor is used for displaying the gas pressure in the gas injection pipeline.

6. The in-situ aeration polluted soil and underground water remediation device according to claim 1, wherein the drug injection pipes are arranged in a square shape in the polluted soil or underground water.