安全、健康和环境2025，Vol.25Issue(1)：50-58,9.DOI:10.3969/j.issn.1672-7932.2025.01.008
含杂质密相CO2管道泄放过程中压力响应与相变路径
Pressure Response and Phase Transition Path During the Release Process of Dense Phase CO2 Pipeline Containing Impurities
摘要
Abstract
Dense phase CO2 pipeline transportation is an important way to efficiently transport CO2,but due to the diversity of its sources,CO2 will inevitably be doped with certain types and contents of impurities,and impurities will affect the flow characteristics and operation efficiency of CO2 pipelines.In order to study the flow and phase transformation characteristics of the dense phase CO2 in the pipeline drainage process,an industrial scale CO2 pipeline drainage experiment device was independently built to carry out the pipeline drainage experi-ments containing 5%N2 impurities and pure CO2,so as to study the influence of N2 impurities on the pressure response and phase transformation path in the dense phase CO2 pipeline drainage process.The experimental re-sults showed that N2 as an impurity can effectively reduce the initial shock times and pressure drop rate,which was beneficial to control the stationality of the release process.The presence of N2 increased the initial decom-pression wave velocity of CO2 pipeline,shortened the decompression wave plateau period,and accelerated the transient pressure response of the pipeline.The presence of N2 increased the pressure temperature at the CO2 phase transition position and raised the minimum temperature of the fluid in the tube.The research results can provide guidance for the safe release and phase control of CO2 pipelines containing impurities.关键词
密相CO2管道/杂质/管道泄放/压力响应/减压波/相变路径Key words
dense phase CO2 pipeline/impurities/pipeline drainage/pressure response/decompression wave/phase change path分类
石油、天然气工程引用本文复制引用
孙明源,黄贤滨,刘艳,谢守明,王世强,陶彬..含杂质密相CO2管道泄放过程中压力响应与相变路径[J].安全、健康和环境,2025,25(1):50-58,9.基金项目
中国石化科技部项目(323060),二氧化碳输送过程安全风险评估与防控技术研究. （323060）
