高含CO_(2)煤层气脱碳工艺选择及应用探讨  

Discussion on the Selection and Application of Decarbonization Process for High CO_(2) Coalbed Methane

作　　者：陈浦 赵勇 温丽娟 史永祥 Chen Pu;Zhao Yong;Wen Lijuan;Shi Yongxiang(Xinjiang Yaxin Coalbed Methane Investment and Development(Group)Co.,Ltd.,Urumqi Xinjiang 830010,China)

机构地区：[1]新疆亚新煤层气投资开发(集团)有限责任公司,新疆乌鲁木齐830010

出　　处：《山西化工》2024年第8期119-122,共4页Shanxi Chemical Industry

摘　　要：煤层气气体组分以CH_(4)为主,另外含有少量CO_(2)与N_(2)等非烃气体。其中CH_(4)和CO_(2)、N_(2)所占比例互为消长关系。N_(2)为惰性气体,其含量高低除了影响煤层气使用热值外无其他危害,而CO_(2)浓度过高明显降低煤层气的热值和燃烧效率,同时还会腐蚀地面集输管道和处理装置,缩短金属管道及设备的使用寿命,因此脱碳是高含CO_(2)煤层气高效利用的重要途径。本文介绍了三种适用于煤层气脱碳的成熟工艺,从装置一次性投资、甲烷回收率、运行成本等方面进行了综合对比。鉴于煤层气产量低,建议采用MDEA法高效处理高含CO_(2)煤层气,以获得较高的甲烷回收率,使煤层气商品率和经济效益达到最大化。The main component of coalbed methane gas is CH_(4),with a small amount of non hydrocarbon gases such as CO_(2)and N_(2).The proportion of CH_(4),CO_(2),and N_(2)is in a reciprocal relationship.N_(2)is an inert gas,and its content not only affects the calorific value of coalbed methane,but also poses no other hazards.However,a high concentration of CO_(2)significantly reduces the calorific value and combustion efficiency of coalbed methane,and can also corrode surface gathering and processing pipelines and equipment,shortening the service life of metal pipelines and equipment.Therefore,decarbonization is an important way to efficiently utilize high CO_(2)coalbed methane.This article introduces three mature processes suitable for decarbonization of coalbed methane,and provides a comprehensive comparison in terms of one-time investment in equipment,methane recovery rate,and operating costs.Given the low production of coalbed methane,it is recommended to use the MDEA method to efficiently process high CO_(2)coalbed methane,in order to achieve a higher methane recovery rate and maximize the commercial and economic benefits of coalbed methane.

关 键 词：煤层气 二氧化碳 脱碳工艺 MDEA法 PSA法 膜法 

分 类 号：TE654[石油与天然气工程—油气加工工程]