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Enhanced in-situ thermal desorption heating device and method for contaminated soil

A technology of polluting soil and adding heat, applied in the restoration of polluted soil, etc., to achieve the effect of expanding the contact area, avoiding secondary pollution, and improving efficiency

Active Publication Date: 2021-03-19
JILIN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for in-situ thermal desorption of contaminated soil in order to solve many problems existing in the vertical heating wells and extraction wells used in the existing in-situ heat conduction desorption

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  • Enhanced in-situ thermal desorption heating device and method for contaminated soil

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Embodiment Construction

[0036] see Figure 1 to Figure 6 Shown:

[0037] The contaminated soil enhanced in-situ heat removal and heating device provided by the present invention includes an installation tunnel 1, a heating pipe 2, an extraction pipe 3, a steam boiler 4, an extraction pump 5, a power supply station 6, an air compressor 10 and a controller 7 , where the installation tunnel 1 is set at one end of the polluted soil, the bottom of the installation tunnel 1 is set lower than the bottom of the pollutants in the polluted soil, the heating pipe 2 and the extraction pipe 3 are provided with an array, and the array heating pipe 2 and the extraction pipe The pipes 3 are alternately arranged in layers in the contaminated soil in the horizontal direction. The inlet of the heating pipe 2 and the outlet of the extraction pipe 3 are assembled on the side wall of the installation tunnel 1 on the side of the polluted soil. The heating pipe 2 passes through the pipeline and the air The compressors 10 a...

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Abstract

The invention discloses an enhanced in-situ thermal desorption heating device and method for contaminated soil. The heating device comprises a mounting tunnel, a heating pipe, an extraction pipe, a steam boiler, an extraction pump, a power supply station, an air compressor and a controller, the mounting tunnel is arranged at one end of contaminated soil body, the bottom of the mounting tunnel is lower than the bottom of a pollutant in the contaminated soil body, and a plurality of groups of heating pipes and extraction pipes are arranged and are alternately arranged in the contaminated soil body in a layered manner in the horizontal direction. The method comprises the following steps: step 1, taking a horizontal operation space for the extraction pipes and the heating pipes; step 2, forming horizontally-staggered holes in the mounting tunnel; step 3, installing and debugging equipment; step 4, forming a micro cycle; step 5, enabling the heating pipes to maintain relatively high thermalconductivity; step 6, performing discharging after innocent treatment; and step 7, realizing accurate thermal desorption of the soil pollutants. The device and the method have the beneficial effectsof forming micro circulation, improving the repair efficiency and ensuring the heat conduction efficiency.

Description

technical field [0001] The invention relates to a device and method for remediating polluted soil, in particular to a device and method for intensifying in-situ thermal desorption and adding heat for polluted soil. Background technique [0002] In recent years, due to extensive industrial development, the soil in areas such as chemical plants and landfills has been polluted. In terms of soil pollution remediation, ex situ remediation of shallow soil is more common, while in situ remediation technology of deep soil started relatively late. Soil in-situ thermal desorption technology has been gradually promoted because it does not need to excavate and transfer soil, has little disturbance to the surrounding soil environment, completely removes pollutants, and can repair deep soil. [0003] According to different heating methods, in-situ thermal desorption technology is divided into three types: steam heating (SEE), electrical resistance heating (ERH), and thermal conduction he...

Claims

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Application Information

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IPC IPC(8): B09C1/06
CPCB09C1/062B09C2101/00
Inventor 杜立志韩亚鲁张晓培胡新民刘晨阳葛华
Owner JILIN UNIV
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