垃圾填埋场填埋气产生与迁移计算机模拟  

Computer simulation of gas generation and transport in landfills

作　　者：樊石磊[1] 吕鑑[1] 席北斗[2] 霍守亮[2] 许其功[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100022 [2]中国环境科学研究院,北京100012

出　　处：《环境工程学报》2008年第8期1115-1120,共6页Chinese Journal of Environmental Engineering

基　　金：国家重点基础研究发展计划项目(2005CB724203)

摘　　要：准确预测填埋场内填埋气随时间和空间的变化规律,对填埋场的管理和填埋气的合理应用具有重要作用。以多孔介质流体动力学理论为基础,构建了填埋场中气体迁移转化过程三维模型。应用有限单元法和迭代法对模型的非线性方程组进行了求解,计算了填埋场中气体的压力分布情况。结果表明,填埋初期气压随深度和时间的增加而增加;而后气压随时间增加逐渐减小。It is very important for management of landfills and rational application of landfill gas to accurately predict distribution rules of landfill gas. Based on the theory of fluid dynamics in porous media,a comprehensive three-dimensional （3D） model of gas generation and transport in landfills was developed. Solutions to the model were accomplished by finite element method, the iterative solution approach was adopted to get the analytical solution in accordance with the character of the nonlinear mathematical model. The pressure distribution of landfill gas was calculated and simulated. The results showed that the pressure of solid landfill gas increased with the depth and time, and dispersed gradually afterward.

关 键 词：填埋气 有限元 数学模型 

分 类 号：X703[环境科学与工程—环境工程]