Heating well structure

Abstract

The invention provides a heating well structure which comprises an outer sleeve, an inner sleeve, partition plates, heating rods and a gas injection pipe, and the lower portion of the outer sleeve isa first screen pipe section; the lower part of the inner sleeve is a second sieve tube section, and the inner sleeve is nested in the outer sleeve; the partition plates are located in an annular gap formed by the inner sleeve and the outer sleeve and evenly divide the annular gap into a plurality of cavities in the circumferential direction. At least one heating rod is arranged in each cavity; andthe gas injection pipe is connected with the top of the inner sleeve. According to the invention, the design of the inner sleeve and the outer sleeve is adopted, the plurality of heating rods are arranged in the annular gap between the two sleeves, and the pipeline of the inner sleeve is supplemented with compressed hot air, so that the diffusion of heat of a heating well to surrounding soil is accelerated, and the improvement of the heat diffusion efficiency of the heating well is realized.

Description

technical field [0001] The invention relates to a soil restoration device, in particular to a heating well structure. 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 pollutants by means of direct or indirect heating, and selectively promotes the target pollutants to decompose, gasify, volatilize, 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 does not need to excavate the contaminated soil. At present, two types of in-situ thermal desorption technologies are usually used: heat condu...

AI Technical Summary

Problems solved by technology

[0004] However, the current in-situ thermal desorption method has low heat transfer efficiency due to the single heat dissipation method, resulting in low thermal desorption efficiency and high cost.

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