Experimental system for treating thermal desorption tail gas of organic polluted soil through low temperature plasma

Abstract

The invention provides an experimental system for treating thermal desorption tail gas of organic polluted soil through low temperature plasma. The experimental system comprises a gas carrying device, a thermal desorption tail gas generating device, a heat insulation device, a low temperature plasma treatment device and a tail gas absorbing device, wherein the gas carrying device comprises a first gas carrying route for providing general gas and a second gas carrying route for providing mixed gas, and the mixed gas refers to a mixture of the general gas and steam; the thermal desorption tail gas generating device is used for producing polluted gas; the heat insulation device is used for preventing pollutants in the thermal desorption tail gas from coagulating in pipelines; the low temperature plasma treatment device is used for performing degradation treatment on the pollutants in the thermal desorption tail gas; and the tail gas absorbing device is used for absorbing residual pollutants in the thermal desorption tail gas after degradation treatment. The experimental system disclosed by the invention is simple in structure, convenient and swift to mount and debug, short in technological parameter obtaining period, and low in energy consumption cost.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to an experimental system for treating thermal desorption tail gas of organic polluted soil with low-temperature plasma. Background technique [0002] With the adjustment of my country's industrial structure and the acceleration of urbanization, a large number of chemical and pesticide production enterprises have been relocated, and many of the original land has been adjusted for residential or commercial use. Leakage and wastewater discharge have caused serious soil pollution, especially organic pollution. The pollutants involved include petroleum hydrocarbons, polycyclic aromatic hydrocarbons, benzene series, organochlorine pesticides, polychlorinated biphenyls, etc. Thermal desorption technology is the process of heating the soil containing pollutants to a high enough temperature through direct or indirect heat exchange, so that the pollutants can be...

AI Technical Summary

Problems solved by technology

Although the condensation-adsorption method can effectively remove organic pollutants in the tail gas, this method still needs to dispose of the pollutants after condensation-adsorption, and the consumption of adsorbent is large and the cost is high

The combustion method has high removal efficiency of pollutants, but it needs to consume a lot of fuel, and the treated tail gas is easy to produce dioxins during the cooling and emission process, so it is necessary to add a quenching device after combustion, and the treatment cost is relatively high.

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