垃圾填埋场竖井抽气条件下的填埋气压力分布  

Pressure Distribution of LFG in a Landfill with Vertical Extraction System

作　　者：彭绪亚[1] 余毅[1] 刘国涛[1] 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400045

出　　处：《重庆大学学报（自然科学版）》2003年第1期92-95,共4页Journal of Chongqing University

基　　金：国家自然科学基金 (项目编号 :5 99780 5 3 );教育部"春晖计划"资助项目

摘　　要：对垃圾填埋气污染控制与回收利用系统的规划设计 ,目前实际工程中通常采用现场抽气试验的方法确定相关技术参数。文章通过分析填埋气在垃圾体中迁移运动的特点 ,建立了在抽气条件下填埋气体的迁移运动模型 ,该模型综合反映了垃圾体内填埋气产生量、抽气量、垃圾体气体渗透系数、抽气井埋深、覆盖层厚度及特性对抽气效果的影响。利用该模型 ,可计算抽气时垃圾体中填埋气的压力分布 ,并可分析计算不同条件下抽气井影响半径、抽气井埋深等重要工程参数 。In present engineering practice of landfill gas pollution control and its recovery, technical parameters such as extraction flow and radius of influence of a extraction well must be determined by field tests. A mathematical model for LFG migration under a vertical extraction well is established, which comprehensively reflects affects of several parameters including LFG generation rate, extraction flow, air permeability, buried depth of a extraction well and features of the cover layer. By using the model, pressure distribution of LFG around a vertical extraction well in a landfill can be calculated, the radius of influence of the well can also be determined.

关 键 词：垃圾填埋场 竖井抽气 填埋气 迁移 压力分布 模拟 污染控制 回收利用 

分 类 号：X705[环境科学与工程—环境工程]