In-situ repairing system for organic polluted soil under hardened road surfaces

Abstract

The invention relates to the technical field of soil treatment, in particular to an in-situ repairing system for organic polluted soil under hardened road surfaces. The system comprises a soil gas extraction portion, extraction well portions, a chemical storage tank portion and chemical injection well portions. The soil gas extraction portion is connected with the extraction well portions through a first pipeline, the chemical storage tank portion is connected with the chemical injection well portions through a second pipeline, the extraction well portions are distributed around the chemical injection wells by taking the chemical injection wells as the centers, one chemical injection well portion and four surrounding extraction well portions form a unit, and every unit is in quincuncial-pile-shaped distribution. The in-situ repairing system has the advantages that the in-situ repairing system is simple and convenient to operate; a co-treatment mode of gas suction and chemical injection is adopted to treat the organic polluted soil under the hardened road surfaces, so that soil repairing effect is good, treatment time is short, working limitation is low, and applicability is high; the in-situ repairing system is particularly applicable to difficult low-permeability soil repairing.

Description

technical field [0001] The invention relates to the technical field of soil treatment, in particular to an in-situ restoration system for soil contaminated by organic matter under a hardened road surface. Background technique [0002] With the development of urbanization, industrial enterprises in cities have begun to relocate, and most of the relocated sites have soil pollution, which seriously threatens the health and environmental conditions of the surrounding residents, and effective measures are urgently needed to deal with them. Volatile and semi-volatile organic pollutants are one of the most common pollutants in the soil of industrial sites, which contain petroleum hydrocarbons, benzene, phenols, polycyclic aromatic hydrocarbons, halogenated hydrocarbons, etc., which are harmful to the human body and the environment. It is extremely harmful. When it exists in the soil, it will cause many problems such as accelerating the aging of underground pipelines, threatening th...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an in-situ remediation system for organic matter-contaminated soil under the hardened pavement to overcome technical defects in the prior art such as low work efficiency, unsatisfactory remediation effect, large use limitations, and poor applicability.

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