气体杂质对CO_2管道输送系统安全的影响  

Impacts of gas impurities on the security of CO_2 pipelines

作　　者：李玉星[1] 刘梦诗 张建[2] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院 [2]中国石化胜利勘察设计研究院

出　　处：《天然气工业》2014年第1期108-113,共6页Natural Gas Industry

基　　金：国家科技支撑计划项目"大规模燃煤电厂烟气CO2捕集纯化;输送及安全控制技术研究"(编号:2012BAC24B01);国家自然基金项目"含杂质超临界二氧化碳管道输送安全控制关键技术研究"(编号:51374231)

摘　　要：目前CO2管道输送呈现出快速发展趋势,相关问题也日益备受关注。目前国际上还没有关于CO2管道输送混合气体组分的统一标准,而我国在CO2输送管道的建设方面还处于空白,关于CO2中各种杂质对其输送过程的影响特别是对安全的影响也尚不清楚。为此,在对国外CO2长输管道运行现状进行调研的基础上,对管道实际输送CO2混合气体中的杂质类型、杂质含量以及不同的CO2混合气体组成要求进行了总结,分析了含有不同杂质(H2、H2S和SO2等)的CO2混合气体物性参数(密度、黏度和蒸气压)和相态特性的变化规律,重点从管线腐蚀、CO2水合物形成及CO2溶解于水等方面研究了不同杂质对CO2管道系统设计运行的影响,尤其是游离水对CO2输送管道安全运行的影响,并参照国外CO2管道输送系统的标准规范提出了管道输送的CO2混合气体的纯度和含水量要求。It is such a rapid progress in CO2 transport via pipelines that the relevant issues have attracted much concern in China and around the world. Up till now, no universally accepted codes have yet been formulated for the combinations of CO2 stream in pipelines. What＇s more, in China there is no experience in CO2 pipeline design and construction. Therefore, little has ever been known about the impurities in the CO2 stream via pipelines and their effects on CO2 transport. In view of this, through an investigation into the status quo of foreign long-distance CO2 pipeline operation, we summarized the amount and type of impurities in the CO2 stream as well as different requirements for combinations in the stream. Then, we analyzed the physical parameters like density, viscosity and vapor pressure of the CO2 stream containing various types of impurities such as H2, H2S, CO2 , etc. and the changing rules of their phase behavior. The emphasis was put on the impacts of different impurities on the CO2 pipeline design and operation in the as- pects of pipeline corrosion, hydrate formation, the dissolution of CO2 in water, and so on, especially the effect of free water on the safe operation of CO2 pipelines. Furthermore, by reference to the foreign criteria or codes of CO2 pipeline transport system, the requirements for the purity of gas components and water content were presented for the CO2 stream via pipelines.

关 键 词：二氧化碳 管道输送 组分要求 杂质影响 管线腐蚀 二氧化碳水合物 二氧化碳溶解 安全分析 

分 类 号：TE88[石油与天然气工程—油气储运工程]