摘要
能源转型背景下,液氨管道输送的安全性得到了广泛关注。针对成品油管道改造输送液氨的停输再启动工况展开研究,探讨管道系统的安全运行边界。首先,界定了停输工况下的安全控制条件,作为判定管道是否处于安全停输时间的理论依据。然后,建立停输再启动过程模型并计算安全停输时间,采用单变量分析方法对水平管道的水力与热力参数进行敏感性分析。最后,代入起伏管道参数并分析其与水平管道的停输特性差异。结果表明:增大流量、出口压力与停输压力,减小总传热系数有利于延长安全停输时间;入口温度低于环境温度时,管道输送系统的安全控制条件由管流相态控制转为管材控制;起伏管道的安全停输时间由高点的温度、压力决定,该点液氨的少量气化未影响管道系统的稳定性。对于设计压力较高的管道,将停输温度控制低于环境温度一定值,可充分利用氨的低温特性和管材强度,从而大幅延长安全停输时间。未来相关研究可立足于成品油与液氨顺序输送场景,增加对混输段影响因素的关注,细化安全控制条件,提升管道运输的安全性和效率。
Against the backdrop of energy transition,the safety of liquid ammonia pipeline transmission has been widely concerned.The paper studies the stopping and restarting condition of liquid ammonia transmission from refined oil pipeline and explores the safe operation boundary of pipeline system.It defines the safety control conditions under the stopping condition as the theoretical basis for judging whether the pipeline is in a safe stopping time firstly,establishes the stopping and restarting model,calculates the safe stopping time,and carries out the sensitivity analysis of hydraulic and thermal parameters of the horizontal pipeline by univariate analysis method secondly,and substitutes the undulating pipeline parameters as well as analyzes the difference in stopping characteristics between them and the horizontal pipeline finally.The results show that increasing the capacity,outlet pressure,and stopping pressure,as well as reducing the total heat transfer coefficient are conducive to prolonging the safe stopping time,the phase safety control condition is changed to the safety control of the pipe when the inlet temperature is lower than the ambient temperature,and the temperature and pressures of the high point would determine the safe stopping time of the undulating pipeline, where the small amount of gasification of liquid ammonia does not affect the stability of the pipeline system. For pipelines with high design pressure, controlling the stopping temperature below a certain value of ambient temperature can significantly extend the safe stopping time by utilizing the low-temperature property of ammonia and the strength of the pipe. It recommends that future research could base on the sequential transport scenarios of refined oil products and liquid ammonia, increase the attention to the influencing factors of oil mixing, refine the safety control conditions, and improve the safety and efficiency of pipeline transport.
作者
黄明月
涂仁福
牛鹏涛
付广涛
刘春颖
张瀚文
廖绮
邱睿
梁永图
HUANG Mingyue;TU Renfu;NIU Pengtao;FU Guangtao;LIU Chunying;ZHANG Hanwen;LIAO Qi;QIU Rui;LIANG Yongtu(College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing),Beijing 102249,China;PipeChina Institute of Science and Technology,Tianjin 300457,China;College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《油气与新能源》
2025年第6期69-79,共11页
Petroleum and new energy
基金
国家自然科学基金资助项目“面向大规模成品油管网调度的数据解析与优化融合方法”(52202405)
国家自然科学基金资助项目“多式联运下管道顺序输送能力时空演化规律与协同调度研究”(52502411)
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)。
关键词
液氨
成品油管道
相态安全控制
停输工况
安全停输时间
Liquid ammonia
Refined oil pipelines
Phase safety control
Sh utdown conditions
Safe shutdown time
