天然气能量计量用在线微型热导气相色谱仪的研制与应用  

Development and Application of an On-Line Micro Gas Chromatograph with Thermal Conductivity Detector for Natural Gas Energy Metering

作　　者：林俊杰 邓凡锋 周理[2] 许向东[3] 李志昂[1] 张婷 肖炼 魏东 潘义[1] LIN Junjie;DENG Fanfeng;ZHOU Li;XU Xiangdong;LI Zhiang;ZHANG Ting;XIAO Lian;WEI Dong;PAN Yi(National Institute of Measurement and Testing Technology,Chengdu 610021,China;Research Institute of Natural Gas Technology of PetroChina Southwest Oil and Gasfield Company,Chengdu 610213,China;University of Electronic Science and Technology of China(UESTC),Chengdu 610054,China;Chengdu Sichuangruizhi Technique Co.,Ltd.,Chengdu 610066,China;Chengdu BC Analytical Technique Co.,Ltd.,Chengdu 610300,China)

机构地区：[1]中国测试技术研究院,成都610021 [2]中国石油西南油气田公司天然气研究院,成都610213 [3]电子科技大学,成都610054 [4]成都思创睿智科技有限公司,成都610066 [5]成都市倍诚分析技术有限公司,成都610300

出　　处：《计量科学与技术》2024年第11期49-56,共8页Metrology Science and Technology

基　　金：四川省重大科技专项资助(2018TZDZX0008);国家标准物质资源共享平台(APT2302-6);四川省重点研发计划(2023YFG0070)。

摘　　要：天然气能量计量用微型在线气相色谱仪长期被国外垄断,给我国天然气国际贸易带来不利影响,开展国产化替代具有重要意义。研制了微型色谱进样系统、微型热导检测器、在线发热量计算色谱工作站等多个天然气能量计量关键核心器件(部件),率先在国内开发出具有自主知识产权的高可靠天然气能量计量微型在线气相色谱仪,样机在天然气流量计量站和天然气制氢现场开展了示范应用,分析天然气中N_(2)、CO_(2)、C_(1)~C_(6)等11个组分的分析周期为2.5 min,天然气中己烷检出限为80μmol/mol,正丁烷和异丁烷的分离度R为2.0,正丁烷定量重复性为0.30%,4小时仪器稳定性为0.07%。研发的样机通过了6020台时的长期稳定性测试,各项指标能够满足天然气能量计量的需求,实现了微型气相色谱仪的国产化替代,为助力国家天然气能源安全和实现“双碳”战略目标提供了测量技术支撑。The micro gas chromatograph for natural gas energy metering has long been monopolized by foreign companies,creating disadvantages for China in international natural gas trade.Developing domestic alternatives is therefore of great significance.This study developed several key components for natural gas energy metering,including a micro chromatographic injection system,micro thermal conductivity detector(μ-TCD),and an online chromatographic workstation for energy value calculation.The research team has led the development of a highly reliable micro on-line gas chromatograph for natural gas energy metering with independent intellectual property rights in China.The experimental prototype has been successfully applied at natural gas flow metering stations and hydrogen production sites,analyzing 11 components in natural gas such as N_(2),CO_(2),and C_(1)–C_(6) with an analysis cycle of 2.5 minutes.The detection limit for hexane is 80μmol/mol,the resolution(R)between n-butane and isobutane is 2.0,the repeatability for n-butane quantification is 0.30%,and the 4-hour instrument stability test shows a deviation of 0.07%.The prototype has passed long-term stability testing of 6020 operating hours,meeting the requirements for natural gas energy metering.This domestically developed micro gas chromatograph represents a significant step toward replacing foreign models,providing crucial measurement technology support for national energy security and the achievement of China's"dual carbon"strategic goals.

关 键 词：计量学 天然气 能量计量 微型热导气相色谱仪 示范应用 

分 类 号：TB99[一般工业技术—计量学]