Contaminated soil in-situ solar thermal desorption remediation system

Abstract

The invention provides a contaminated soil in-situ solar thermal desorption remediation system, and belongs to the technical field of contaminated soil remediation, the system comprises a support frame, a heat collection pipe, a heat collection cover, a reflector, a gas supply part, a gas injection pipeline and a gas extraction pipeline; the heat collection pipe is rotationally installed on the support frame, and a spiral piece is arranged on the outer side of the heat collection pipe; the heat collection cover is installed on the support frame and arranged on the outer side of the heat collection pipe in a sleeving mode; a waste gas channel for waste gas to pass through is formed between the heat collection pipe and the heat collection cover; and the reflector is used for reflecting sunlight to the heat collection pipe. According to the contaminated soil in-situ solar thermal desorption remediation system, solar energy is used for heating gas, and energy consumption is reduced; when the waste gas generated by thermal desorption passes through a waste gas channel, the waste gas exchanges heat with the gas in the heat collection pipe, and the gas in the heat collection pipe is secondarily heated by utilizing the heat of the waste gas, so that the utilization rate of energy is improved, the energy loss is reduced, and the heating efficiency of the gas in the heat collection pipe is also improved.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil restoration, and more specifically relates to an in-situ solar thermal desorption restoration system for contaminated soil. Background technique [0002] Thermal desorption technology achieves the purpose of separating and removing pollutants from soil particles by heating the polluted soil to above the boiling point of the target pollutant. During the heating process, the target pollutants are evaporated, distilled, boiled, oxidized and pyrolyzed, and the pollutants are transformed from one phase to another, and the fluidity is greatly improved. The in-situ thermal desorption technology separates the target pollutants from the soil under negative pressure conditions without changing the position of the contaminated soil, and finally eliminates them completely or concentrates them in the waste gas treatment facilities. This remediation technology can efficiently remove volatile and semi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an in-situ solar thermal desorption repair system for polluted soil, which aims to solve the problems of high energy consumption and poor waste gas collection effect in existing in-situ thermal desorption devices for polluted soil

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