A thermal desorption remediation system for contaminated soil with waste heat reuse

Abstract

The invention relates to a thermal desorption restoration system for polluted soil with waste heat reuse, comprising: a thermal desorption device, a heat supply device, an exhaust gas treatment device and a surface heat exchange device. device, heat supply device and exhaust gas treatment device. The thermal desorption repair system uses the surface heat exchange device to preheat the combustion air at normal temperature with the high-temperature tail gas generated during the repair process, realizing the reuse of waste heat from the tail gas; the initial cooling of the tail gas is carried out in the form of waste heat exchange , reduces the burden of secondary cooling, and reduces the input cost of secondary cooling equipment; the soil thermal desorption repair system of the present invention has reasonable structure, simple operation, convenient use, no secondary pollution, and realizes the reuse of waste heat from exhaust gas, and has the advantages of Broad application prospects and practical value.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a thermal desorption repair system for polluted soil with waste heat reuse. Background technique [0002] Thermal desorption technology has the advantages of short remediation period, fast remediation speed, and good adaptability to the type and concentration of VOCs. It is widely used in the remediation of organic contaminated soil. During the restoration process, the soil needs to be heated at a higher temperature. After heating, a large amount of high-temperature exhaust gas will be generated. The high-temperature exhaust gas will cause heat loss and difficulty in exhaust gas treatment. Therefore, researchers and technology developers are working hard to improve the restoration methods and Improve system design to address heat loss and reuse of waste heat during remediation. [0003] The repair system in the prior art lacks components for exhaust waste heat ...

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Problems solved by technology

[0004] This application provides a thermal desorption repair system for contaminated soil with waste heat reuse, which solves or partially solves the technology in the prior art that waste heat is lost in the process of thermal desorption repair, tail gas post-treatment is difficult, and the repair process is costly. Problems, realize the reuse of exhaust heat, reduce the difficulty of exhaust gas post-treatment, and reduce the technical effect of the repair process cost

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