李欣泽,孙佳奇,袁亮,张超,王梓丞,孙晨,董正淼,张海帆,孙颖婷,邢晓凯,熊小琴,邹炜杰
LI Xinze,SUN Jiaqi,YUAN Liang,ZHANG Chao,WANG Zicheng,SUN Chen,DONG Zhengmiao,ZHANG Haifan,SUN Yingting,XING Xiaokai,XIONG Xiaoqin,ZOU Weijie

• 1:中国石油大学(北京)克拉玛依校区工学院
• 2:新疆多介质管道安全输送重点实验室
• 3:中国石油新疆油田公司开发公司
• 4:中国石油新疆油田公司基本建设工程处

摘要(Abstract)：

超临界CO_2管道在停输和再启动等瞬态过程中，流体易发生相变，密度、比热容等物性参数会发生阶跃式变化，使得管内的CO_2流体体积发生剧烈波动，将对管道产生脉动冲击，危害管道安全。为了明确超临界CO_2管道安全停输时间的影响因素，从安全控制的角度出发，首先结合超临界CO_2物性、相图和准临界性质，确定了超临界CO_2管道安全停输时间的定义，从管道停输开始至管内任一点流体进入气液共存区的时间；然后依托新疆油田CO_2管输示范工程，分别采用商业软件和MATLAB编程的方式，建立超临界管输水力热力计算模型，探究了管道停输及再启动过程中管内温度、压力、密度及相态协同变化波动规律；最后采用因素轮换法研究了主要工艺参数和环境参数对管道安全停输时间的影响规律。结果表明：降低首站出站温度、提高管道运行压力、较高土壤环境温度、较低管土总传热系数有助于延长超临界CO_2管道的安全停输时间。研究结果可为超临界CO_2管道安全运行提供一定理论支持和技术保障。
In the transient process of supercritical CO_2 pipeline shutdown and restart, the fluid is prone to phase change, and physical property parameters such as density and specific heat capacity may appear step variation, resulting in drastic fluctuations of CO_2 fluid volume in the pipeline, which may cause pulsating impact on the pipeline and endanger pipeline safety. In order to clarify the factors affecting safe shutdown time of supercritical CO_2 pipeline, from the perspective of safety control, the safe shutdown time of supercritical CO_2 pipeline is firstly defined by combining supercritical CO_2 physical properties, phase diagram and quasi-critical properties: from the beginning of pipeline shutdown to the time at any point in the pipeline when fluid enters gas-liquid coexistence zone. Based on CO_2 pipeline transportation demonstration project of Xinjiang Oilfield, hydraulic-thermodynamic calculation model for supercritical pipeline transportation is established by respectively using commercial software and MATLAB programming to investigate the cooperative changes law of temperature, pressure, density and phase state in pipeline during shutdown and restart. Finally, the influence of main process parameters and environmental parameters on safe shutdown time of pipeline is studied by factor rotation method. The results show that reducing initial station outlet temperature, increasing pipeline operation pressure, high soil temperature and low total heat transfer coefficient are helpful to prolong the safe shutdown time of supercritical CO_2 pipeline. The research provides theoretical and technical support for safe operation of supercritical CO_2 pipeline.

关键词(KeyWords)： 超临界CO_2;管道输送;瞬变特性;停输再启动;相变;安全停输时间
supercritical CO_2;pipeline transportation;transient characteristics;shutdown and restart;phase transition;safe shutdown time

Abstract:

Keywords:

基金项目(Foundation): 中国石油大学（北京）克拉玛依校区科研启动基金（XQZX20230021）;; 新疆维吾尔自治区自然科学基金资助项目“二氧化碳管道停输再启动温压协同变化机理与安全控制理论研究”（2023D01A19）;; 克拉玛依市创新环境建设计划（创新人才）项目“管输二氧化碳瞬变过程温压及相态协同变化机理和安全控制研究”（20232023hjcxrc0001）;; 新疆维吾尔自治区“天池英才”引进计划（TCYC12）;; 新疆维吾尔自治区“一事一议”引进战略人才项目（XQZX20240054）;; 新疆天山创新团队“油气高效管输技术研究与应用创新团队”（2022TSYCTD0002）

作者(Author): 李欣泽,孙佳奇,袁亮,张超,王梓丞,孙晨,董正淼,张海帆,孙颖婷,邢晓凯,熊小琴,邹炜杰
LI Xinze,SUN Jiaqi,YUAN Liang,ZHANG Chao,WANG Zicheng,SUN Chen,DONG Zhengmiao,ZHANG Haifan,SUN Yingting,XING Xiaokai,XIONG Xiaoqin,ZOU Weijie

DOI: 10.19597/J.ISSN.1000-3754.202309002

参考文献(References)：

• [1]戴厚良，苏义脑，刘吉臻，等.碳中和目标下我国能源发展战略思考[J].北京石油管理干部学院学报，2022,29(2):12-19.DAI Houliang, SU Yinao, LIU Jizhen, et al. Thinking of China’s energy development strategy under carbon neutrality goal[J]. Journal of Beijing Petroleum Management Institute,2022,29(2):12-19.
• [2]杨友麒.“双碳”形势下能源化工企业绿色低碳转型进展[J].现代化工，2023,43(1):1-12.YANG Youqi. Progress of energy and chemical companies in transition towards green low carbon under peak carbon dioxide emission and carbon neutrality[J]. Modern Chemical Industry,2023,43(1):1-12.
• [3]胡其会，李玉星，张建，等.“双碳”战略下中国CCUS技术现状及发展建议[J].油气储运，2022,41(4):361-371.HU Qihui,LI Yuxing,ZHANG Jian,et al. Current status and development suggestions of CCUS technology in China under the“Double Carbon”strategy[J]. Oil&Gas Storage and Transportation,2022,41(4):361-371.
• [4] PELETIRI S P,RAHMANIAN N,MUJTABA I M. CO2 pipeline design:A review[J]. Energies,2018,11(9):2184.
• [5]郭克星，闫光龙，张阿昱，等. CO2捕集、利用与封存技术及CO2管道研究现状与发展[J].天然气与石油，2023,41(1):28-40.GUO Kexing,YAN Guanglong,ZHANG Ayu,et al. Status quo and development of the research on CO2 capture, utilization and storage technology and CO2 pipeline[J].Natural Gas and Oil,2023,41(1):28-40.
• [6]张强，杨玉锋，张学鹏，等.超临界二氧化碳管道完整性管理技术发展现状与挑战[J].油气储运，2023,42(2):152-160.ZHANG Qiang,YANG Yufeng,ZHANG Xuepeng,et al. Technology status and challenge of integrity management of supercritical carbon dioxide pipeline[J]. Oil&Gas Storage and Transportation,2023,42(2):152-160.
• [7]赵青，李玉星，李秋扬.超临界CO2管道停输过程中安全控制研究[J].石油机械，2015,43(2):110-114.ZHAO Qing,LI Yuxing,LI Qiuyang. Research on safety control for shutdown of supercritical CO2 Pipeline[J]. Oil Field Equipment,2015,43(2):110-114.
• [8]陈兵，房启超，白世星.含杂质超临界CO2输送管道的停输影响因素[J].天然气化工（C1化学与化工），2020,45(3):84-89.CHEN Bing,FANG Qichao,BAI Shixing.Research on the factors influencing the shutdown of the transport pipeline of supercritical CO2 containing impurities[J]. Natural Gas Chemical Industry(C1 Chemistry and Chemical Engineering),2020,45(3):84-89.
• [9]赵青，李玉星.杂质对管道输送CO2相特性的影响规律[J].油气储运，2014,33(7):734-739.ZHAO Qing,LI Yuxing. Impact of impurities on the phase behavior of CO2 in pipeline transportation[J]. Oil&Gas Storage and Transportation,2014,33(7):734-739.
• [10]高飞，辛建旭，郭志强，等.含杂质CO2物性变化规律及其机理研究[J].石油化工高等学校学报，2022,35(4):18-25.GAO Fei,XIN Jianxu,GUO Zhiqiang,et al. Study on physical property changes and their mechanism of carbon dioxide containing impurities[J]. Journal of Petrochemical Universities,2022,35(4):18-25.
• [11] PASQUETTO S,PATRONE L. Comportamento della materia allo stato gassoso[M]//PASQUETTO S, PATRONE L. Chimica Fisica. Milano:M.S.p.A.,1990.
• [12]孙方田.含油超临界CO2冷却换热理论与实验研究[D].天津：天津大学，2007.SUN Fangtian. Theoretical and experimental research on cooling heat transfer of supercritical CO2-lubricant oil mixture[D].Tianjin:Tianjin University,2007.
• [13]张志刚.超临界流体过程相平衡实验研究[D].大连：大连理工大学，2006.ZHANG Zhigang. Experimental study on phase equilibra of supercritical fluids processes[D]. Dalian:Dalian University of Technology,2006.
• [14]刘敏.超临界二氧化碳管道输送瞬变特性研究[D].青岛：中国石油大学（华东），2015.LIU Min.The transient characteristics of supercritical carbon dioxide pipelines[D]. Qingdao:China University of Petroleum(East China),2015.
• [15]王全德.长距离超临界CO2管道输送仿真应用研究[D].西安：西安石油大学，2020.WANG Quande. Research on simulation application of long distance supercritical CO2 pipeline transportation[D]. Xi’an:Xi’an Petroleum University,2020.
• [16]赵青，李玉星.管道输送CO2准临界特性及安全控制[J].油气储运，2014,33(4):354-358.ZHAO Qing,LI Yuxing. Quasi-critical characteristics and safety control of CO2 pipeline transportation[J]. Oil&Gas Storage and Transportation,2014,33(4):354-358.
• [17]陈嘉琦，蒲明，李育天，等.国内外CO2管道设计标准对比分析[J].油气与新能源，2023,35(1):94-100.CHEN Jiaqi,PU Ming,LI Yutian,et al. Discussion on domestic and overseas standards for the design of CO2 pipeline[J]. Oil&Gas and New Energy Sources,2023,35(1):94-100.
• [18]中华人民共和国工业和信息化部.二氧化碳输送管道工程设计标准：SH/T 3202—2018[S].北京：中国石化出版社，2018.Ministry of Industry and Information Technology of the People’s Republic of China. Specification for engineering of carbon dioxide pipeline transportation:SH/T 3202-2018[S]. Beijing:China Petrochemical Press,2018.
• [19] Det Norske Veritas. Design and operation of carbon dioxide pipelines:DNV-RP-F104[S]. Veritasveien:DNV,2021.
• [20] SUOTON P, NEJAT R, IQBAL M. CO2 Pipeline Design:A Review[J]. Energies,2018,11(9):2184.
• [21] NEMEC R. Carbon dioxide pipelines seen as cost-saving measure in troubled times[J]. Pipeline&Gas Journal,2020,7:247.