垃圾填埋气体资源化利用过程中多场耦合问题  

Multi-field coupling problem of landfill gas for resource utilization

作　　者：薛强[1] 梁冰[2] 王惠芸[1] 刘磊[2] 

机构地区：[1]武汉工业学院多孔介质力学研究所,湖北武汉430023 [2]辽宁工程技术大学力学与工程科学系,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2006年第B06期104-106,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50309015);武汉市青年科技晨光计划项目(20055003059-33);建设部科学技术基金资助项目(05-K2-15);农业部农业环境与农产品安全重点开放实验室基金项目资助(200503)

摘　　要：填埋气体通过孔隙(或裂隙)介质向外界迁移和释放的过程是一个复杂的动力学过程,其运移受到周围环境的温度场、水分场和应力场变化的影响。总结了国内外对填埋气体资源化利用过程中的研究动态及其存在的问题,对多场耦合理论在填埋气体运移过程中的应用进行分析,研究结果表明:填埋介质中气体的渗流促成了内部热能以对流的方式发生转移,导致了填埋体内温度场再分布;填埋体内温度场的变化,改变了填埋体的热物理性能及结构特征的变化,从而将会影响气体的渗流特性,即应力场和渗流场发生改变。同时,对下一步需要研究的问题提出了建议。The migration and release of landfill gas is a complex dynamic process in porous （or fracture） media. The pore ambient conditions such as thermal field, moisture field and stress field have important effect on landfill gas flow. The recent advance in the application research and problems of landfill gas resource utilization at home and aboard are summarized. Application of multi-field coupling theory to landfill gas resource utilization are analyzed. The research results show that the seepage of landfill gas induces the transfer of internal heat energy by the form of convection, which leads to redistribution of thermal field.The variation of thermal field result in the change of thermal-physical properties and structure characteristics. Moreover, the seepage properties of landfill gas are changed, namely, the change of stress field and seepage field. Hence further issues to be solved are put forward.

关 键 词：填埋气体 多场耦合 动力学机制 数学模型 资源化利用 

分 类 号：O357.3[理学—流体力学]