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[1]胡其会　杨腾　苗青　列斯别克·,塔拉甫别克　李兆兰　范振宁.含杂质超临界CO2管道放空对管内温压变化的影响实验[J].油气储运,2024,43(05):1-14.
　HU Qihui,YANG Teng,MIAO Qing,et al.Experimental study on the influence of impurity containing supercritical CO2 pipeline venting on temperature and pressure changes inside the pipeline[J].Oil & Gas Storage and Transportation,2024,43(05):1-14.

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含杂质超临界CO₂管道放空对管内温压变化的影响实验

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年05期页码: 1-14 栏目: 出版日期: 2024-05-25

Title:: Experimental study on the influence of impurity containing supercritical CO2 pipeline venting on temperature and pressure changes inside the pipeline

作者:: 胡其会　杨腾　苗青　列斯别克·塔拉甫别克　李兆兰　范振宁

Author(s):: HU Qihui; YANG Teng; MIAO Qing; Liesibieke·TALAFUBIEKE; LI Zhaolan; FAN Zhenning

关键词:: CCUS; 超临界; 二氧化碳管道; 杂质; 相态变化; 放空

Keywords:: CCUS; carbon dioxide pipeline; impurities; phase change; venting experiment

分类号:: TE832

文献标志码:: A

摘要:: [目的]管输CO₂不可避免含有杂质，杂质的存在会对超临界CO₂管道放空过程管内介质温降、压降、相态变化等产生重要影响，但目前针对大管径工业规模级别的超临界CO₂管道放空实验研究较为欠缺。[方法]设计了一套含杂质超临界CO₂管道节流放空实验装置，研究不同含量的CH₄或N₂杂质对超临界CO₂管道放空过程中主管道和放空管道内温降、压降及相态变化的影响，得出含杂质超临界CO₂管道放空主管道内流体相态变化趋势图。[结果]含杂质超临界CO₂管道放空，杂质的混入会显著影响管内CO₂的充装质量和放空时间，且杂质N₂的混入能一定程度上提高放空管道CO₂节流后温度；混入杂质CH₄或N₂均能明显提升放空过程主管道内流体的最低温度，缩小管内流体径向温差，且混入杂质越多，管内流体最低温度越高，径向温差越小；纯CO₂、杂质物质的量分数为1%的CO₂管道与杂质物质的量分数为3%的CO₂管道放空过程中主管道内最低温度位置呈相反规律，纯CO₂、杂质物质的量分数为1%的CO₂管道放空过程中距离放空管道最远处管内温度最低，而杂质物质的量分数为3%的CO₂管道放空过程中管内最低温度则出现在距离放空管道最近处。[结论]研究成果可为含杂质超临界CO₂管道放空系统设计、放空过程干冰预防、管材保护提供参考。

Abstract:: Pipeline CO₂ inevitably contains impurities, which can have significant impacts on the temperature drop, pressure drop, and phase change of the medium inside the supercritical CO₂ pipeline during the venting process. A set of experimental equipment for throttling and venting of supercritical CO₂ pipelines containing impurities was designed to study the effects of different concentrations of CH₄ or N₂ impurities on the temperature drop, pressure drop, and phase change inside the main pipeline and venting pipeline during the venting process of supercritical CO₂ pipelines. The trend chart of fluid phase change inside the main pipeline of supercritical CO₂ pipelines containing impurities was obtained. The release of CO₂ from pipelines containing impurities will significantly affect the filling quality and release time of CO₂ in the pipeline, and the mixing of impurities N₂ can to some extent increase the temperature after CO₂ throttling in the release pipeline; Mixing impurities CH₄ or N₂ can significantly increase the minimum temperature of the fluid in the main pipeline during the venting process, reduce the radial temperature difference of the fluid in the pipeline, and the more impurities are mixed, the higher the minimum temperature of the fluid in the pipeline, and the smaller the radial temperature difference; The lowest temperature position in the main pipeline during the venting process of a CO₂ pipeline with a pure CO₂ and impurity content of 1% and a CO₂ pipeline with an impurity content of 3% follows an opposite pattern. A CO₂ pipeline with a pure CO₂ and impurity content of 1% has the lowest temperature in the farthest distance from the venting pipeline, while a CO₂ pipeline with an impurity content of 3% has the lowest temperature in the pipeline that is closest to the venting pipeline. The research results can provide reference for the design of impurity containing supercritical CO₂ pipeline venting system, prevention of dry ice during venting process, and pipe protection.

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更新日期/Last Update: 2024-03-26