基于超临界CO_2技术土体脱水效果及影响因素分析  

Analysis of soil dehydration effect and influencing factors based on supercritical CO_2 technology

作　　者：张伦超[1,2] 张艳江 高玉春 梁冠军[1] ZHANG Lunchao;ZHANG Yanjiang;GAO Yuchun;LIANG Guanjun(Department of Civil Engineering, Chuzhou Vocational and Technical College, Chuzhou, Anhui 239000, China;College of Civil and TransportationEngneering, Hohai University, Nanjing, Jiangsu 210098,China;ReewincEnergi （Wuhan） Engineering Technology Co. ,Ltd. /Wuhan, Hubei 430206,China)

机构地区：[1]滁州职业技术学院土木工程系,安徽滁州239000 [2]河海大学土木与交通学院,江苏南京210098 [3]瑞风能源(武汉)工程技术有限公司,湖北武汉430206

出　　处：《江苏建筑职业技术学院学报》2018年第1期9-11,23,共4页Journal Of Jiangsu Vocational Institute of Architectural Technology

基　　金：安徽省教育厅2016年高校自然科学研究重点项目(KJ2016A538)

摘　　要：为了解超临界CO_2技术对土体脱水技术可行性,通过对高岭土和膨润土土样在是否超临界状态下进行的脱水试验分析,研究压力、温度和CO_2流量等因素对土体脱水效果的影响.结果表明:试验温度对超临界CO_2干燥过程有显著影响,而压力和CO_2流量对干燥过程的影响相对较小;高岭土土样在超临界CO_2条件下,其自由水脱除效果相比非超临界条件约高1倍;自由水脱除约54.1%,结合水脱除约57.8%,说明超临界CO_2条件下土体脱除结合水效果更明显.In order to understand the feasibility of supercritical CO2 technology for soil dewatering,the effect of pressure,temperature and CO2 flow on soil dewatering was studied by analyzing the dehydration test of kaolin and bentonite soil samples under supercritical condition.The results show that the experimental temperature has a significant effect on the drying process of supercritical CO2,and the influence of pressure and CO2 flow on the drying process is relatively small.In the condition of supercritical CO2,the free water removal effect of kaolin is about one times higher than that of non supercritical condition,the free water removal is about 54.1%,and the water removal is about 57.8%,which shows that the effect of soil removal and binding water is more obvious under supercritical CO2 condition.

关 键 词：超临界CO2 土体脱水 干燥技术 

分 类 号：TU41[建筑科学—岩土工程] X701[建筑科学—土工工程]