美国天然气输配系统甲烷减排经验及启示  

Experience and Enlightenment of Methane Emission Reduction in U.S.Natural Gas Transmission and Distribution System

作　　者：朱瑞娟 朱子涵 车明 ZHU Ruijuan;ZHU Zihan;CHE Ming

机构地区：[1]北京市燃气集团研究院,北京100011

出　　处：《煤气与热力》2023年第2期39-42,共4页Gas & Heat

摘　　要：运用相关系数法对美国天然气系统各环节甲烷排放量进行相关性分析,得出输配环节对美国天然气系统甲烷减排贡献度最大。燃气厂站逸散、管道泄漏这2类来源对输配环节甲烷减排贡献度最大。单位长度甲烷排放量较高的铸铁管、未保护钢管主干管道长度逐年减少,单位长度甲烷排放量较低的PE管长度逐年增加,管道的更新促使输配系统甲烷减排。美国在进站压力0.68 MPa以上燃气厂站实施了泄漏检测及修复措施,有利于燃气厂站甲烷减排。注重老旧管道更新,加大泄漏检测及修复,加大甲烷排放实测,是中国城镇燃气行业可以借鉴的经验。The correlation coefficient method is used to analyze the correlation of methane emissions in each link of the U.S. natural gas system, and it is concluded that the transmission and distribution links have the largest contribution to methane emission reduction in the U.S. natural gas system. The two types of sources, the escape of gas plants and stations and pipeline leakage contribute the most to the methane emission reduction in the transmission and distribution links. The length of main pipelines using cast iron pipes and unprotected steel pipes with high methane emission per unit length is decreasing year by year, while the length of PE pipes with low methane emission per unit length is increasing year by year. The renewal of the pipeline has promoted the emission reduction of methane in the transmission and distribution system. The United States has implemented leak detection and repair measures in gas plants and stations with inlet pressure above 0.68 MPa, which is conducive to methane emission reduction in gas plants and stations. Paying attention to the renewal of old pipelines, increasing leak detection and repair and increasing the actual measurement of methane emissions are the experience that can be learned for China’s urban gas industry.

关 键 词：甲烷减排 城镇燃气 天然气输配系统 相关系数 

分 类 号：X511[环境科学与工程—环境工程]