A device for remediation of organic contaminated soil by using thermal desorption combined with an oxidant and a remediation method

Abstract

The invention belongs to the technical field of environmental protection, and in particular relates to a device for remediation of organic contaminated soil by using thermal desorption combined with an oxidant and a remediation method. The device of the invention is composed of an air heater, an air compressor, an air valve, a dosing valve, a dosing tank, a vacuum suction pump, a delivery pump, an electric power control unit, an insulation layer, lateral pipes, injection syringes, injection wells, a gas collection well and vacuum suction pipelines. According to the invention, through a treatment method of in situ thermal desorption and adding the oxidant, volatile organic compound contaminated soil is effectively treated. The technique of the invention is applicable to a relatively broad scope, can be used to perform in situ pollution remediation of volatile organic compounds under different climatic conditions, geological conditions, soil properties, and earth surface conditions. The heater of the present invention can infuse more produced heat into the soil, thus saving fuel and combustion time.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a device and a repair method for repairing soil polluted by organic matter by thermal desorption combined with an oxidant. Background technique [0002] Since the reform and opening up, with the rapid development of industrialization in our country, the scale of cities has gradually expanded, thus making the urbanization process achieve unprecedented development. In the process of the continuous expansion of the city to the periphery, a large number of industrial enterprises located in the periphery and polluting have gradually become part of the central area of ​​the city; and the population in the central area of ​​the city is often highly concentrated, and these industrial enterprises with pollution risks are harmful to human health. and environmental security pose a great threat. In order to meet the requirements of improving the quality of the u...

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Problems solved by technology

However, in the soil containing a large amount of organic pollutants, the amount of permanganate oxidant required to remove organic matter is very large, and the amount of manganese dioxide produced after the reaction will exceed the safe concentration, so it cannot be used directly in general. permanganate repair

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