Supercritical fluid restoration treatment system of polluted soil

Abstract

The invention relates to a supercritical fluid restoration treatment system of polluted soil, belonging to the field of environmental geotechnics. The supercritical fluid restoration treatment system mainly comprises a feeding device, an extraction device and a discharging device, and can carry out supercritical fluid extraction restoration on the polluted soil so as to avoid secondary pollution of the environment; the same equipment and the same restoration process can realize simultaneous extraction of different pollution components, so that the extraction range is wide; continuous operation of soil extraction restoration is realized, so that the restoration cost is reduced; due to the adoption of a vertical type ribbon stirrer, the soil permeability is enhanced, the contact area and the contact opportunity with an extraction agent are increased, and the extraction efficiency is improved; no air is mixed in the extraction process, and no loss of the extraction agent is caused, so that the purity of the extraction agent is ensured and the loss of the extraction agent is avoided; and the treatment process is intelligently controlled, so that the intelligent control of extraction parameters of different pollution components is realized, the treatment cost is minimized, and the normal operation of the equipment is ensured.

Description

technical field [0001] The invention relates to a supercritical fluid remediation treatment system for polluted soil, which is mainly used for rapid heterotopic remediation treatment of organic polluted soil, and belongs to the field of environmental geotechnical engineering. Background technique [0002] With the rapid development of industry and agriculture in our country, various pollutants, especially organic pollutants, are discharged into the air, water and soil. Soil is the final destination of various pollutants, and the accumulation of pollutants has become one of the main pollution problems. After pollutants enter the soil, they not only affect the growth and development of plants and changes in biological communities, but also lead to a decline in food production and quality, pose a serious threat to the safety of agricultural products, and cause secondary pollution to surface water and groundwater. Toxic pollutants enter the human body through the food chain, fu...

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Problems solved by technology

However, there is no research and development of related equipment at present, so the research on supercritical fluid remediation of contaminated soil is still in the stage of theoretical research and laboratory experiments, and there is no relevant large-scale simulation test and engineering implementation

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