Contaminated soil in-situ eddy current thermal desorption system

Abstract

The invention discloses a contaminated soil in-situ eddy type thermal desorption system comprising a plurality of electric heating-extraction / ventilation integrated wells. Each electric heating-extraction / ventilation integrated well comprises an electric heating pipe and an extraction well pipe, wherein the electric heating pipe is sleeved with the extraction well pipe, and the extraction well pipe is provided with an extraction pipe orifice and a ventilation pipe orifice. According to the contaminated soil in-situ eddy type thermal desorption system, the function layout of well points is adjusted conveniently according to the remediation conditions of all stages of a site, well point extraction and point heating are switched, fluidity of airflow is improved, the problem of a dead zone of airflow of a traditional heating site is solved, and the effect of treatment of a different position mode is achieved while a in-situ mode is kept. The contaminated soil in-situ eddy type thermal desorption system has the advantages that the heating and extraction functions are switched freely, the layout is flexible, heating temperature is uniform, the short circuit dead zone is avoided, site adaptability is high, and remediation efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of soil remediation equipment, and in particular relates to the technical field of in-situ electric heating desorption remediation of polluted sites. Background technique [0002] At present, the soil pollution situation in our country is serious, and the harm of organic pollutants to human body and environment has become the environmental focus of all countries in the world. Typical organic pollutants in soil include benzene series, organic halides, petroleum hydrocarbons, pesticides and PCBs etc. The existence of these pollutants in the soil environment may have serious adverse effects on the nearby human body and the surrounding environment, so it is urgent to use reasonable technical means to restore these polluted soils. [0003] As an important technology for soil remediation of highly difficult organically polluted sites, in-situ thermal desorption technology can remediate most of the volatile or ref...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, and propose an in-situ eddy current thermal desorption system for contaminated soil, which integrates the heating well and the extraction well, effectively avoiding the dead zone of soil heating, and the continuous heating of the heating rod is easy to short circuit Damage, single airflow direction and other defects, the system has strong site adaptability and is a fully automated system, so as to more effectively remove volatile and semi-volatile organic pollutants in the soil

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