含杂质超临界CO_(2)管道水击瞬态模拟  

Transient simulation of water hammer in supercritical CO_(2) pipelines containing impurities

作　　者：聂超飞 殷布泽 苗青 杨琦 路建鑫 胡其会[2] 李玉星[2] NIE Chaofei;YIN Buze;MIAO Qing;YANG Qi;LU Jianxin;HU Qihui;LI Yuxing(PipeChina Institute of Science and Technology;College of Pipeline and Civil Engineering,China University of Petroleum(East China)//Shandong Key Laboratory of Oil&Gas Storage and Transportation Safety)

机构地区：[1]国家管网集团科学技术研究总院分公司,天津市300450 [2]中国石油大学(华东)储运与建筑工程学院•山东省油气储运安全重点实验室

出　　处：《油气储运》2025年第2期168-174,共7页Oil & Gas Storage and Transportation

基　　金：中国石油科技创新基金研究项目“油气管道在线应力超声波测试技术研究”,2017D-5007-0605。

摘　　要：[目的]随着“双碳”战略目标持续推进,CO_(2)管道设计建设进入快速发展期。长距离CO_(2)管道运输常以超临界/密相态运行,管输介质密度大、相态复杂多变,工况变化、设备启停等引发的水击风险亟需评估。[方法]为了明确超临界CO_(2)管道的水击特性,针对中国某含杂质超临界CO_(2)管道,采用OLGA软件建立瞬态模型研究地形起伏情况下含杂质超临界CO_(2)管道的水击问题,并与水击压力理论公式计算结果进行对比。[结果]在高程起伏的CO_(2)管道中,沿线最低点容易出现水击超压失稳或低压导致相变的风险,在管道压力设计时应在理论计算的水击压力幅值基础上增加最高点的高程水柱压力以防止水击超压,在规定最低运行压力时也应该考虑最低点的高程水柱压力防止水击负压产生相变。相较于纯CO_(2),当管内存在密度小于CO_(2)的杂质时,水击压力幅值降低,水击周期增长,可以有效降低CO_(2)管道的水击危害。[结论]在CO_(2)管道工程设计中,建议将水击理论公式与考虑高程的瞬态仿真模型相结合来计算水击安全问题,尤其注意管道全线的低点位置。关于杂质含量的指标制定,不仅要考虑水击问题,还需根据经济比选,腐蚀、泄漏、减压波、韧性止裂等风险评价以及上游碳源的情况综合分析。[Objective]The ongoing promotion of“dual carbon”strategic goals has accelerated the design and construction of CO_(2) pipelines.Long-distance CO_(2) pipeline transportation typically operates in a supercritical or dense phase state,where the high medium density and complex phase behavior necessitate an urgent assessment of water hammer risks due to changes in operating conditions and equipment startup/shutdown.[Methods]To clarify the water hammer characteristics of supercritical CO_(2) pipelines,a transient model was developed using OLGA software,focusing on a supercritical CO_(2) pipeline containing impurities in China.This study examined the water hammer issue under topographic relief and compared the results with those obtained from the theoretical formula of water hammer pressure.[Results]In the CO_(2) pipeline with fluctuating elevations,the lowest point was susceptible to water hammer overpressure instability or phase transition due to low pressure.To mitigate this risk during pipeline pressure design,the water column pressure at the highest elevation point should be added to the theoretically calculated water hammer pressure amplitude.Additionally,when determining the minimum operating pressure,the water column pressure at the lowest elevation point should be considered to prevent phase changes caused by water hammer negative pressure.Compared with pure CO_(2),the presence of impurities with a density lower than CO_(2) in the pipeline reduced the water hammer pressure amplitude and increased the water hammer period,thereby effectively mitigating the water hammer risk in CO_(2) pipelines.[Conclusion]In CO_(2) pipeline engineering design,it is advisable to integrate the theoretical formula of water hammer with a transient simulation model that accounts for elevation to address water hammer issues,particularly focusing on the low points of the entire pipeline.In establishing impurity content indexes,it is essential to consider not only water hammer but also economic comparisons,risk evaluations(including

关 键 词：CO_(2)管道 水击 OLGA 瞬态模拟 

分 类 号：TE832[石油与天然气工程—油气储运工程]