Organic contaminated site reinforced repair system and process

Abstract

The invention discloses an organic contaminated site reinforced repair system which comprises an extraction system, a medicament injection system, a heating system and a blocking repair layer. According to the organic contaminated site reinforced repair system, the in-situ thermal desorption technology and the chemical oxidization technology are combined, meanwhile, a repair material layer is added, the repair material layer is prepared from slow release oxidization materials and mainly prepared from persulfate, natural clay materials, nonmetallic mineral, cement and the like, and sulfate radical produced after persulphate reaction can be fixed. By means of the repair system, on one hand, the organic contaminated site in-situ thermal desorption repair cost can be reduced; on the other hand, the in-situ chemical oxidation repair efficiency can be improved, secondary pollution can be reduced, accordingly, the repair cost is reduced, and the repair efficiency is improved.

Description

technical field [0001] The invention relates to an intensified restoration system for organic polluted sites, which belongs to the technical field of pollution control in environmental protection. Background technique [0002] With the continuous advancement of my country's urbanization process, a large number of relocation sites have appeared in cities, most of which are polluted. For land contaminated by heavy metals, treatment methods are relatively easy; for organically polluted sites, since most organic substances have irritating odors, when remediation is carried out by reprocessing after excavation, secondary pollution often occurs due to problems such as the diffusion of odors. In this case, the in-situ remediation technology that does not excavate the contaminated site is more popular, and the common ones include in-situ gas phase / multiphase extraction technology, in-situ chemical oxidation technology, in-situ thermal desorption technology, etc. Among them, the in-...

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Problems solved by technology

Among them, the in-situ chemical oxidation technology is mainly to oxidize the toxic pollutants in the soil and groundwater into non-toxic substances by injecting chemical oxidants into the site. Sulfate radicals can easily lead to excessive sulfate radicals in the repair area; at the same time, due to the influence of clay texture, poor permeability and other factors, the diffusion of chemicals during in-situ chemical oxidation construction is hindered, and the repair efficiency is affected

[0003] The in-situ thermal desorption technology promotes the volatilization of organic pollutants in the site by heating the polluted site, and collects the volatilized pollutants through gas phase extraction for harmless treatment. It can quickly and efficiently remediate organic polluted sites, but due to its high energy consumption and high remediation costs, its application is limited

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