Integrated treatment system for organic exhaust gas of thermal desorption of contaminated soil and treatment method

Abstract

The invention discloses an integrated treatment system for organic exhaust gas of thermal desorption of contaminated soil and a treatment method. The system comprises a pretreatment separating unit, acondensation cooling unit, a vacuum providing unit, an organic exhaust gas removal unit and a control unit, wherein the pretreatment separating unit, the condensation cooling unit, the vacuum providing unit and the organic exhaust gas removal unit are sequentially connected; the pretreatment separating unit comprises a first steam-water separator; the condensation cooling unit comprises a coolingheat exchange device and a second steam-water separator; the vacuum providing unit comprises at least one vacuum pump or vacuum blower; the organic exhaust gas removal unit comprises a pretreatment temperature and humidity adjusting device, an adsorption device and a matched regenerating device; and the control unit is connected with the pretreatment separating unit, the condensation cooling unit, the vacuum providing unit and the organic exhaust gas removal unit separately and is used for controlling automated operation of each unit. The integrated treatment system for the organic exhaust gas of thermal desorption of the contaminated soil, disclosed by the invention, can achieve efficient treatment of in-situ thermal desorption exhaust gas and is good in treatment effect and high in removal rate of organics.

Description

technical field [0001] The invention belongs to the field of soil remediation, and more specifically relates to an integrated system and method for treating polluted soil thermal desorption organic tail gas. Background technique [0002] Soil pollution has attracted more and more people's attention. With the development of industrialization and urbanization, a large number of industrially polluted sites have been replaced in urban areas. Among them, volatile organic polluted sites account for a relatively large proportion, which is harmful to the surrounding ecological environment and residents' health. posed a serious threat. [0003] At present, the remediation technologies for VOC-contaminated sites mainly include cement kiln co-processing, gas phase extraction technology, biological ventilation technology, chemical oxidation technology, microbial treatment, heterogeneous / in-situ thermal desorption technology, etc. The in-situ thermal desorption technology is to heat the...

AI Technical Summary

Problems solved by technology

However, due to the complex composition of soil tail gas, there is currently no ideal treatment system for in-situ thermal desorption tail gas. Therefore, it is necessary to provide an integrated system for the treatment of contaminated soil thermal desorption organic tail gas

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