Role of thermal desorption equipment in soil remediation of chemical contaminated sites

With the rapid development of China's social economy and urbanization process, the scale of urban areas is constantly expanding, and a large number of pesticide, petrochemical, fine chemical, coal chemical, metallurgical and other enterprises located in the old city are relocated or closed. According to incomplete statistics, by 2009, nearly 100000 polluting enterprises had been shut down or relocated nationwide, mainly including heavy polluting enterprises such as chemical, pesticide, steel, coking, etc., forming a large number of high-risk pollution sites. The soil of these sites is often polluted by volatile or semi volatile agricultural production system pollutants, heavy metals and other pollutants, with heavy pollution degree and relatively concentrated distribution; Characteristic pollutants vary from place to place; The high level of the polluted soil layer can reach several meters to tens of meters, and the groundwater is polluted at the same time. If these pollutants are not treated, they will constitute a human health risk in, and they are a major environmental hazard. Some existing thermal desorption soil remediation equipment have complex structure, high manufacturing and operation costs, low treatment efficiency and weak applicability to different soil characteristics.

Thermal desorption equipment is widely used in soil remediation engineering and is an efficient tool for soil remediation. Thermal desorption soil remediation is applicable to the treatment of volatile and semi volatile agricultural production system pollutants (such as petroleum hydrocarbons, pesticides, pesticides, polychlorinated biphenyls) and mercury. It has the advantages of diverse treatment methods (in-situ, ectopic), mobile equipment, wide range of pollutant treatment, short treatment time, and reusable soil after remediation.

Thermal desorption soil remediation refers to the process of raising the temperature of contaminated soil to above the boiling point of the target pollutant through direct or indirect heating under vacuum conditions or when the carrier gas is introduced. The system temperature and the residence time of contaminated soil are controlled to selectively promote the gasification and volatilization of the target pollutant and the separation of soil particles, and then enter the gas treatment system for removal.

The thermal desorption equipment for remediation of contaminated soil manufactured by Songling Heavy Industries has good material selection and quality. It is free to install and debug. Interested users can consult us online. (YHzp)