Heating and waste-gas burning method for thermal desorption restoration of contaminated site

Abstract

The invention discloses a heating and waste-gas burning method for thermal desorption restoration of a contaminated site. According to the method, combustion gas is allowed to contact with combustionair through a burner, and the burner is ignited to allow the combustion gas to burn continuously and stably in a combustion chamber; then generated high-temperature flue gas is sent to a thermal desorption restoration system for indirect conduction and heat transfer; and desorbed organic waste gas generated by the thermal desorption restoration system is sent to the combustion chamber for thermalcombustion. The method is carried out by an intelligent integrated burning treatment machine which includes a combustion gas supply unit, a combustion air supply unit, a backdraft waste gas introduction unit, the burner, the combustion chamber and a control cabinet. The heating and waste-gas burning method of the invention can use a conventional gas fuel as an energy source, and has high energy utilization efficiency; and the used machine is simple, safe, stable and reliable, has both the functions of heat generation through combustion and thermal combustion treatment of waste gas, and can provide a stable high-temperature combustion flue gas heat source and a good high-concentration desorbed organic gas heat treatment solution for thermal desorption restoration technology.

Description

technical field [0001] The invention relates to a method for remediation of polluted sites, in particular to a heating and waste gas combustion treatment method for in-situ thermal desorption or pile-type thermal desorption remediation of polluted sites. Background technique [0002] Thermal Desorption technology can be widely used in in-situ or ex-situ remediation of volatile organic compounds, semi-volatile organic compounds, petroleum hydrocarbons or mercury-contaminated sites. This technology heats the polluted soil and / or groundwater to close to or even exceed the boiling point of the target pollutant by means of direct or indirect heating, and selectively promotes the desorption, gasification, volatilization, Decompose or increase its mobility, so that the target pollutants can be separated from the soil medium and removed, so as to achieve the purpose of remediation of contaminated sites. [0003] The in-situ thermal desorption remediation technology can be implement...

AI Technical Summary

Problems solved by technology

[0005] At present, the engineering application of in-situ thermal desorption remediation technology or pile-type thermal desorption technology in domestic contaminated site remediation is still relatively limited. The injection heating desorption technology is susceptible to various difficulties such as the limitation of soil conditions and the upper limit of the target temperature, the high energy cost required for heating, and the difficulty in handling the generated desorption waste gas.

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