复杂有机污染场地中原位热脱附技术修复效果研究  

Study on Remediation Effect of In-situ Thermal Desorption Technology for Complex Contaminated Site

作　　者：席晋峰 梅志华 赵申 徐国杰 Xi Jinfeng;Mei Zhihua;Zhao Shen;Xu Guojie(Jiangsu Wish Environmental Science and Technology Co.,Ltd.,Suzhou 215124;Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]江苏维诗环境科技有限公司,江苏苏州215124 [2]南京信息工程大学,江苏南京210044

出　　处：《广东化工》2021年第16期94-99,共6页Guangdong Chemical Industry

摘　　要：本文通过江苏南部某复杂有机污染场地的修复中试工程,研究了原位热脱附技术对有机污染场地的修复效果,并在此基础上分析修复过程中土壤的升温曲线、废水和废气中污染物浓度变化情况以及修复过程中的热效率。结果表明,原位热脱附技术能够有效去除土壤中的有机污染物,去除率均在99%以上。土壤温度的升温速率与土壤水分有关。原位热脱附系统抽提废水及废气中的污染物含量均呈现出先逐渐升高后迅速降低的现象,不同种类的污染物浓度达到峰值的时间不同,其中沸点较低的污染物最先达到峰值。本项目中使用的能源为液化石油气,其热效率为12.13%。In this paper, the remediation effect of in-situ thermal desorption(ISTD) technology on organic contaminated sites is studied through an ISTD remediation pilot project of a complex organic contaminated site in southern Jiangsu. On this basis, the temperature evolution curve, the changes in the concentration of pollutants in waste water and exhaust gas, and the thermal efficiency during the soil remediation process is analyzed. The results showed that the ISTD technology could effectively remove the organic pollutants in the soil, and the removal rate was above 99 %. The heating rate of soil temperature was related to soil moisture. The content of pollutants in waste water and gas extracted by the ISTD system all showed a phenomenon of gradually increasing first and then rapidly decreasing. The time for the concentration of different types of pollutants in the exhaust gas to reach the peak was different, among which the pollutant with the lower boiling point was the first to reach Peak. In this pilot project, liquefied petroleum gas is utilized with a thermal efficiency of 12.13 %.

关 键 词：土壤修复 原位热脱附 有机污染物 去除率 热效率 

分 类 号：TQ[化学工程]