Contaminated soil in-situ reparation system

Abstract

The invention discloses a contaminated soil in-situ reparation system which is used for repairing the contaminated soil in situ. The contaminated soil in-situ reparation system comprises an extraction well, wherein a seal cover is paved on the ground surface of the contaminated soil; an opening of the extraction well is provided with a gas collecting cover in a sealed mode; an output line of the gas collecting cover is provided with a purification pipeline and a vacuumizing pipeline in parallel; the vacuumizing pipeline is provided with an electromagnetic valve, a vacuum pump, an air blower and an adsorption box; the purification pipeline comprises a purification tank connected to the output pipeline of the gas collecting tank; the pipeline close to the purification tank is provided with an extraction fan; a medicine storage tank is arranged beside the purification tank; the extraction well is internally fixedly provided with a heat insulation pipe which is provided with a heater; a communication lead of the heater penetrates through the heat insulation pipe internally, and extends to a power supply installed outside the ground surface. The system can be used for heating the contaminated soil in the same well, extracting toxic gases, purifying the toxic gases by utilizing a chemical agent so as to purify and repair the contaminated soil in situ.

Description

technical field [0001] The invention relates to the field of contaminated soil remediation, in particular to an in-situ remediation system for polluted soil. Background technique [0002] With the advancement of the modernization process and the accompanying rapid urbanization process, a series of ecological and environmental problems have emerged. Among them, soil pollution caused by the discharge of pollutants into the soil environment and the increase in the types and quantities of agricultural chemicals The problem is particularly prominent. Due to the characteristics of concealment, hysteresis, accumulation, difficulty in treatment and long restoration period, soil pollution has become an increasingly active field of environmental science research, and soil pollution has also become a major environmental issue of common concern all over the world. With the enhancement of people's awareness of environmental protection, when many existing polluted soils are used normally...

AI Technical Summary

Problems solved by technology

Due to the characteristics of concealment, hysteresis, accumulation, difficulty in treatment and long restoration period, soil pollution has become an increasingly active field of environmental science research, and soil pollution has also become a major environmental issue of common concern all over the world. With the enhancement of people's awareness of environmental protection, when many existing polluted soils are used normally again, soil restoration will be carried out in order to achieve the purpose of not affecting people's physical and mental health. There are usually two types of ex-situ restoration and in-situ restoration for soil pollution control. Methods. Ex situ remediation of contaminated soil refers to the restoration of contaminated soil after transfer. Ex situ remediation involves excavation and soil transportation, which destroys the original soil structure. It is difficult to treat deeply polluted areas, and the operation cost is high; in the 1980s Later, developed countries began to pay attention to the problem of soil pollution. The United States spent hundreds of billions of dollars in 10 years in the 1990s to encourage some emerging in-situ soil remediation technologies. Remediation: In the in-situ remediation of contaminated soil, multiple wells are usually excavated separately, some are used for heating, and some are used for gas extraction. This method occupies a large area and increases the construction time of contaminated soil remediation.

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