蒸汽注入-电阻耦合加热过程影响因素及热脱附效果探究  

Influencing factors and thermal desorption performance of the coupled heating process of steam injection and electrical resistance heating

作　　者：陈智康 刘柳君 岳瑞 司马菁珂 毛旭辉[1] CHEN Zhikang;LIU Liujun;YUE Rui;SIMA Jingke;MAO Xuhui(School of Resources and Environmental Sciences,Wuhan University;Shanghai Academy of Environmental Sciences)

机构地区：[1]武汉大学资源与环境科学学院 [2]上海市环境科学研究院

出　　处：《环境工程技术学报》2023年第4期1506-1513,共8页Journal of Environmental Engineering Technology

基　　金：国家重点研发计划项目(2019YFC1805700)。

摘　　要：针对单一热脱附技术的应用局限性,构建蒸汽注入-电阻加热(SEE-ERH)耦合热脱附三维试验系统,研究耦合热脱附技术的影响因素及处理效果。温度场分布试验结果表明,含水率、电压强度、蒸汽注入速率和抽提速率均可影响加热效果;并且,在一定范围内,前3个因素与升温效果呈正相关关系。采用COMSOL软件建立的模型能较好地模拟三维试验系统的加热过程。污染脱附试验结果表明,在ERH的基础上增加SEE可促进污染组分的解吸,并加快污染物去除速率;在20%含水率、80 V电压、1.00 L/min蒸汽注入速率和1.2 L/min抽提速率的条件下,SEE-ERH的加热效率较好,对菲的去除率可达到99.0%。Aiming at the application limitations of single thermal desorption technology,a three-dimensional experimental system of the steam enhanced extraction and electrical resistance heating(SEE-ERH)coupled thermal desorption was constructed to study the influencing factors and desorption performance of the coupled heating process of thermal desorption technology.The results of the temperature field distribution experiments showed that water content,voltage intensity,steam injection amount and extraction rate could influence the heating effect.Within a certain range,the heating effect was positively correlated with the first three factors.The model established using COMSOL software could well simulate the heating process of the system.The pollution desorption experiment results showed that adding SEE to ERH could promote the desorption of pollutant components and accelerate the removal rate of pollutants.Under the condition of 20%moisture content,80 V voltage,1.00 L/min steam injection rate and 1.2 L/min extraction rate,the heating efficiency of SEE-ERH was good,and the desorption efficiency of phenanthrene could reach up to 99.0%.

关 键 词：土壤修复 热脱附 温度场分布 挥发性有机污染物 数值模拟 电阻加热 蒸汽 

分 类 号：X53[环境科学与工程—环境工程]