Thermal desorption soil remediation method

Abstract

The invention discloses a thermal desorption soil remediation method, which is characterized by comprising the following steps: sampling and detecting on-site soil, excavating and transporting the soil to a remediation site, conveying the soil into a heating device by utilizing a conveying device, regulating and controlling the internal temperature of the heating device according to a detection result, rechecking the remediated soil, spraying and humidifying the qualified soil, and backfilling the qualified soil. According to the thermal desorption remediation method, organic matters in soil are heated and volatilized into the gaseous state, and the organic matters are volatilized through heating while a re-checking device is used for conducting detection again, so that the soil remediation efficiency is guaranteed, the removal rate is increased to 99% or above, the remediation effect is improved, and the secondary pollution problem of the soil is reduced; and by detecting the contentof the organic matters in the soil, the most suitable temperature is adopted for heating and volatilizing, so that the repairing efficiency is improved while the resource waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of soil restoration, and in particular relates to a thermal desorption soil restoration method. Background technique [0002] Due to the burning of fossil fuels, oil spills, agricultural use of industrial sewage and sludge, dumping of industrial and agricultural solid waste, and the widespread use of pesticides, organic pollutants such as phthalates, polycyclic aromatic hydrocarbons, organochlorine and organophosphorus pesticides Pollutants enter the soil environment directly or indirectly, and remain in the soil for a long time because of their fat solubility and are easily absorbed by soil particles. Many of these organic substances are carcinogenic, teratogenic or mutagenic substances. If they remain in the soil, they can not only reduce or even eliminate crop yields, but also enter the food chain through plants or animals, seriously affecting human survival and health. [0003] Existing soil remediation...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermal desorption soil repair method to solve the problem of poor repair effect in the above background technology, resulting in secondary soil pollution, slow repair efficiency, and low work efficiency.

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