天然气管道注氢掺混过程数值模拟研究  

Numerical simulation of the process of injecting hydrogen in natural gas pipeline

作　　者：朱红钧[1] 陈俊文 唐堂 汤晓勇 何山 ZHU Hongjun;CHEN Junwen;TANG Tang;TANG Xiaoyong;HE Shan(School of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan,610500,China;CPECC Southwest Company,Chengdu,Sichuan,610041,China;ERM Environmental Resources Management Consulting(Shanghai)Co.,Ltd,Shanghai,200080,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]中国石油工程建设有限公司西南分公司,四川成都610041 [3]伊尔姆环境资源管理咨询(上海)有限公司,上海200080

出　　处：《天然气与石油》2023年第2期22-32,共11页Natural Gas and Oil

基　　金：国家自然科学基金面上项目“严重段塞内流与非线性剪切外流夹击下的柔性立管多场多相耦合振动机理研究”(51979238);中国石油集团工程股份公司支撑课题“含氢输气管道系统关键技术研究”(2019ZYGC-01-09);中国石油集团工程股份公司支撑课题“氢/氨储运及储存设备关键技术研究”(2021ZYGC-03-01)。

摘　　要：将氢气掺入已有天然气管道混合输送,被视为低成本转运绿色氢能的重要手段。利用计算流体力学方法数值研究了不同浓度氢气注入天然气管道后的混合过程,对比分析了不同注氢位置、不同注氢管径以及不同注氢量对均匀掺混距离的影响。结果表明:相较于从管道上部或下部注入,从管轴注入达到均匀混合的距离最短,这与注氢口下游气流的湍动强度有关;当从中部注入时,随着注氢管径的增加或注氢量的减小,管内气流湍动强度增强,均匀混合所需的距离缩短。因此,在工况允许的条件下,将注氢口伸至天然气管道管轴处,并适当增大注氢管径,可以实现较快的均匀掺混。The mixed transmission of natural gas with injected hydrogen is an important means of transporting the green hydrogen energy at a lower cost.The mixing process of injecting hydrogen with different concentration in natural gas is numerically simulated in this research using the computational fluid dynamics method.The effects of the injection position and size of injection tube and the injecting flux of hydrogen on the required length to achieve uniform mixing are examined.Compared with injection from the upper or lower part of the pipeline,injection from the pipe axis resulted in the shortest distance to achieve uniform mixing;as this is dependent on the turbulent intensity downstream the injection point.When injection from the axis of the pipe,the turbulent intensity is enhanced with the increase of the diameter of injection tube or the decrease of injecting flux,resulting in the shortened required length for uniform mixing.Therefore,when operating condition permits,it is recommended to arrange the injection tube at the pipe axis and to enlarge its size appropriately so as to achieve faster and uniform mixing.

关 键 词：天然气管道 掺氢输送 均匀混合 数值模拟 

分 类 号：TE973[石油与天然气工程—石油机械设备]