原位热脱附小试模拟装置土壤温度研究
Study on Soil Temperature Using In-Situ Thermal Desorption Small-Scale Simulation Device
DOI: 10.12677/AEP.2023.133090, PDF,   
作者: 海 巨, 吴晓霞, 梁贤伟：国环危险废物处置工程技术(天津)有限公司，天津；国家环境保护危险废物处置工程技术(天津)中心，天津；孙袭明：天津大学环境科学与工程学院，天津
关键词: 原位热脱附；小试装置；温度场；In-Situ Thermal Desorption； Small-Scale Test Device； Temperature Field
摘要: 原位热脱附技术主要用于修复有机污染场地，具有无需挖掘运输、适用性广、修复效率高等特点，已在国内外众多场地应用。目前国内对于原位热脱附修复技术的装置设备研究较为缺乏，大多工程技术参数以经验为主。本文通过原位热脱附小试模拟装置研究加热棒程序升温和土壤温度曲线，以及最高可达温度等关键参数；加热稳定后通过更改抽提风机功率探究抽提压力对土壤温度分布的影响。结果表明，加热棒程序升温即每加热200℃保温2 h方式保护加热棒可避免其高温熔断；加热棒程序升温稳定在600℃，距离加热棒5 cm、10 cm、15 cm处土壤温度最高可达440℃、330℃、290℃；调节抽提压力可影响土壤温度场分布，抽提压力过大会增大热量损失，增大设备运行负荷。
Abstract: In-situ thermal desorption is mainly used for the remediation of organic contaminated sites, with the characteristics of no need for excavation and transportation, wide applicability, and high re-mediation efficiency. It has been applied in many sites both domestically and internationally. There is a lack of research on the equipment for in-situ thermal desorption, and most parameters are mainly based on experience. This work studied heating rod programmed temperature and soil temperature, as well as the maximum achievable temperature, using a small-scale simulation de-vice. The influence of extraction pressure on soil temperature distribution was investigated by changing the power of extraction after heating stabilization. The results indicate that the heating rod can be protected from high-temperature melting by heating it up in a programmed manner. The heating rod was stable at 600˚C, and the maximum soil temperature could reach 440˚C, 330˚C, and 290˚C at distances of 5 cm, 10 cm, and 15 cm from the heating rod, respectively. Adjusting the extraction pressure can affect the distribution of soil temperature field. Excessive extraction pressure can increase heat loss and increase equipment operating load.
文章引用：海巨, 孙袭明, 吴晓霞, 梁贤伟. 原位热脱附小试模拟装置土壤温度研究[J]. 环境保护前沿, 2023, 13(3): 738-743. https://doi.org/10.12677/AEP.2023.133090

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