Kerb treating process and device for volatile and semi-volatile organic substance polluted soil

Abstract

The outside treating process of polluted soil includes the following steps: excavating the polluted soil, filling the soil inside the treating apparatus, pumping with vacuum pump to form certain vacuum degree in the pumping well while intruding fresh air into soil to promote the volatilization of pollutant and taking out the volatile. The soil may be also heated to speed the volatilization. The treating apparatus consists of exhaust well with exhaust pipeline, temperature controlling sensor and heater embedded into soil pipe. The treated soil may be re-filled or used in other site.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an off-site treatment process and device for volatile and semi-volatile organic compound polluted soil. Background technique [0002] With the development of the petroleum industry, the pollution of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) such as gasoline and diesel in the soil environment is increasing day by day. They mainly come from oil spills, such as ruptured oil pipelines, leaks in storage tanks, and leaks in underground storage tanks. In addition, with the development of the chemical industry, the pollution caused by various VOCs such as benzene, toluene and carbon tetrachloride to the soil is gradually increasing, such as the random dumping of chemical waste and chemical agents, leakage of chemical plants, and chemical transportation. accidents etc. These pollutants can cause many environmental problems...

AI Technical Summary

Problems solved by technology

These pollutants can cause many environmental problems: affect the physical and chemical properties of soil; threaten the water quality safety of groundwater sources; pollute the air; cause explosion hazards due to the accumulation of hydrocarbon gas in the basement of buildings; Accelerated aging of facilities, etc.

However, these methods have their own disadvantages: although landfill is simple to deal with, it is expensive and may face secondary treatment; although incineration has a good treatment effect, the treatment equipment is complicated, expensive, and may cause secondary pollution; hydraulic flushing is wasteful. Serious, the treatment effect is not ideal, and the flushing water needs to be treated; the biological treatment cycle is long, the treatment effect is not ideal, and secondary pollution may also occur

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