NUMERICAL OPTIMIZATION OF HEATING WELLS FOR REMEDIATION OF CONTAMINATED SOIL BASED ON IN-SITU THERMAL DESORPTION TECHNOLOGY

JIANG Chunxu; FENG Junxiao; HUANG Xianmo; HUANG Zhifeng; ZHANG Zhitao

doi:10.13205/j.hjgc.202303022

Volume 41 Issue 3

Mar. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(3): 163-171

JIANG Chunxu, FENG Junxiao, HUANG Xianmo, HUANG Zhifeng, ZHANG Zhitao. NUMERICAL OPTIMIZATION OF HEATING WELLS FOR REMEDIATION OF CONTAMINATED SOIL BASED ON IN-SITU THERMAL DESORPTION TECHNOLOGY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 163-171. doi: 10.13205/j.hjgc.202303022

Citation:

JIANG Chunxu, FENG Junxiao, HUANG Xianmo, HUANG Zhifeng, ZHANG Zhitao. NUMERICAL OPTIMIZATION OF HEATING WELLS FOR REMEDIATION OF CONTAMINATED SOIL BASED ON IN-SITU THERMAL DESORPTION TECHNOLOGY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 163-171. doi: 10.13205/j.hjgc.202303022

Citation:

JIANG Chunxu, FENG Junxiao, HUANG Xianmo, HUANG Zhifeng, ZHANG Zhitao. NUMERICAL OPTIMIZATION OF HEATING WELLS FOR REMEDIATION OF CONTAMINATED SOIL BASED ON IN-SITU THERMAL DESORPTION TECHNOLOGY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 163-171. doi: 10.13205/j.hjgc.202303022

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NUMERICAL OPTIMIZATION OF HEATING WELLS FOR REMEDIATION OF CONTAMINATED SOIL BASED ON IN-SITU THERMAL DESORPTION TECHNOLOGY

doi: 10.13205/j.hjgc.202303022

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Xingdaqi Thermal Control Equipment Co., Ltd, Beijing 100083, China

Received Date: 2022-04-26
Available Online: 2023-05-26
Publish Date: 2023-03-01

Abstract

Abstract

In situ thermal desorption (ISTD), as a kind of physical soil remediation technology, has the advantages of in situ disposal of contaminated soil, less secondary pollution, simpler process principle, and higher efficiency and flexibility. In view of the problems of low removal efficiency and energy waste caused by unreasonable arrangement and neglection of thermal insulation measures in the actual process of soil remediation, COMSOL Multiphysics software was used to simulate the 1000 h heating process of contaminated soil. Based on the model verification, the effects of different arrangement methods, spacing of heating wells and thermal insulation measures on soil heating process were discussed. The results showed that when treating pollutants with a boiling point above 200 ℃, the triangular arrangement of 1.5 m heating well spacing could meet the treatment temperature requirements faster, and the energy consumption was relatively lower. Applying thermal insulation measures on the soil surface could not only prevent the leakage of polluted gas, but also effectively improve the thermal efficiency of soil heating process. In the triangular arrangement, the thermal efficiency was relatively increased by 11.667% after thermal insulation measures applied with a distance of 2.0 m between heating wells.
- in situ thermal desorption,
- soil pollution remediation,
- heating well,
- numerical optimization

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References

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