天然气管道掺氢对天然气分析计量的影响  

Influence of hydrogen blending in natural gas pipeline on natural gas analysis and measurement

作　　者：张镨 周理 张佩颖 罗勤 蒲长胜 ZHANG Pu;ZHOU Li;ZHANG Peiying;LUO Qin;PU Changshen(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610213,China;CNPC Key Laboratory of Natural Gas Quality Control and Energy Measurement,Chengdu,Sichuan 610213,Sichuan,China;Key Laboratory of Natural Gas Quality Control and Energy Measurement for State Market Regulation,Chengdu,Sichuan 610213,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油天然气质量控制和能量计量重点实验室 [3]国家市场监管重点实验室(天然气质量控制和能量计量)

出　　处：《天然气工业》2023年第8期135-145,共11页Natural Gas Industry

基　　金：全国天然气标准化技术委员会标准研究项目“天然气长输管道掺氢输送对质量指标与检测方法标准的影响研究”(编号:天研202210);中国石油西南油气田公司科学研究与技术开发项目“掺氢天然气取样及分析技术研究”(编号:20230312-06)。

摘　　要：天然气管道掺氢输送是现阶段实现氢气长距离输送、规模化使用的有效手段之一,也是天然气工业向“碳中和”目标迈进的重要途径。氢气与天然气中其他常量组分物性差异较大,天然气管道掺氢将影响天然气的物性参数分析计量标准和设备适用性。为此,以3种典型天然气为例,系统分析了天然气物性参数随掺氢浓度的变化趋势,并讨论了天然气管道掺氢对天然气分析计量和相关设备的影响。研究结果表明:(1)当掺氢浓度达40%时,不同天然气的高位发热量、相对密度、沃泊指数、黏度、体积能量密度(10 MPa、20℃)分别下降约27%、35%、10%、20%和40%,压缩因子、声速(10 MPa、20℃)分别上升18%和34%左右;(2)现行天然气产品标准规定的指标限制了天然气掺氢浓度的范围,现有天然气分析计量标准、设备适用的氢气浓度较低,不利于掺氢天然气的准确分析和计量。(3)建议综合各参数确定技术经济性合理的掺氢浓度,修订《天然气:GB 17820—2018》和《进入天然气长输管道的气体质量要求:GB/T 37124—2018》,并开展实验及优化研究拓展分析计量方法、标准和设备的适用范围,合理选用天然气物性参数计算标准。结论认为,天然气管道掺氢对天然气分析计量的影响分析,有助于推动掺氢天然气工业的高质量发展,加快实现“碳中和”具有重要作用。Hydrogen blended transportation of natural gas pipeline is currently one of the effective means to realize long-distance transportation and large-scale utilization of hydrogen,as well as an important pathway for the natural gas industry to advance towards the goal of"carbon neutrality".Due to the significant differences between hydrogen and other constant components in natural gas,however,the addition of hydrogen into natural gas pipeline can influence the physical parameters of natural gas and the applicability of analysis&measurement standards and equipment.Taking three typical types of natural gas as examples,this paper systematically analyzes the variation trend of physical parameters of natural gas with hydrogen concentration,and discusses the influence of the addition of hydrogen into natural gas pipeline on natural gas analysis and measurement and related equipment.The following research results are obtained.First,when the hydrogen concentration reaches 40%,the gross calorific value,relative density,Wobbe index,viscosity and volumetric energy density of different natural gases(10 MPa,20℃)decrease by about 27%,35%,10%,20% and 40% respectively,and the compression factor and sound velocity(10 MPa,20℃)increase by about 18% and 34%,respectively.Second,the indexes specified in the current standards of natural gas products restrict the hydrogen concentration range of natural gas,and the hydrogen concentration applicable to existing natural gas analysis and measurement standards and equipment is lower,which is not conducive to the accurate analysis and measurement of hydrogen blended natural gas.Third,it is suggested to determine the technically and economically reasonable hydrogen concentration based on all parameters comprehensively,revise the Natural Gas(GB 17820-2018)and the Quality Requirements For Gases Entering Long-Distance Gas Pipeline(GB/T 37124-2018),carry out experimental and optimization researches to expand the applicable scope of analysis and measurement methods,standards and equipment,and ratio

关 键 词：掺氢天然气 高位发热量 压缩因子 声速 体积能量密度 分析计量 

分 类 号：TE863.1[石油与天然气工程—油气储运工程]