A thermal desorption device for remediation of organically polluted soil

Abstract

The invention discloses a thermal desorption apparatus for repairing organic polluted soil. The thermal desorption apparatus comprises a crushing device, a thermal desorption screw propulsion device,a first-stage auxiliary screw propulsion device, a second-stage auxiliary screw propulsion device, a humidifying device, a gas treatment device, a water storage box, a combustion chamber and a power supply, wherein the upper end of the thermal desorption screw propulsion device is sequentially provided with the gas treatment device and the crushing device from left to right, the lower end of the thermal desorption screw propulsion device is sequentially provided with the first-stage auxiliary screw propulsion device and the second-stage auxiliary screw propulsion device from top to bottom, theleft side of the first-stage auxiliary screw propulsion device and the second-stage auxiliary screw propulsion device is provided with the humidifying device, the right side of the first-stage auxiliary screw propulsion device and the second-stage auxiliary screw propulsion device is provided with the water storage box, the right side of the water storage box is provided with the combustion chamber, and the power supply is arranged above the combustion chamber. The thermal desorption apparatus of the invention is convenient to operate, has remarkable thermal desorption treatment effect on polluted soil, and further has high thermal desorption efficiency.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a thermal desorption device for remediating organic polluted soil. Background technique [0002] Soil pollution is a serious problem in the process of our current social development and must be solved. Soil is the resource we rely on for production. With continuous development, more and more soil is polluted by organic matter. The best option for treatment is thermal desorption. [0003] According to the literature, thermal desorption technology refers to heating the organic pollutants in the soil to a sufficient temperature through direct or indirect heat exchange under vacuum conditions or when the carrier gas is introduced, so that the organic pollutants can be removed from the contaminated medium. The process of being volatilized or separated and entering the gas treatment system. In thermal desorption, pollutants can be selectively converted from one phase to anot...

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Problems solved by technology

[0004] However, in continuous operation and use, we found that the existing thermal desorption equipment still has some problems. For example, the thermal desorption efficiency is still not ideal. When performing thermal desorption of a large amount of soil, a single thermal desorption system has a large load , the work efficiency is slow, and at the same time, the soil cannot be fully humidified after the treatment, which affects the recycling, and the traditional treatment effect on the gas generated by thermal desorption is poor, etc.

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