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[1]胡其会,杨腾,苗青,等.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(09):985-994.[doi:10.6047/j.issn.1000-8241.2024.09.003]
HU Qihui,YANG Teng,MIAO Qing,et al.Experimental study on the influence of venting on temperature and pressure changes in impurity-containing supercritical CO2 pipeline[J].Oil & Gas Storage and Transportation,2024,43(09):985-994.[doi:10.6047/j.issn.1000-8241.2024.09.003]
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HU Qihui,YANG Teng,MIAO Qing,et al.Experimental study on the influence of venting on temperature and pressure changes in impurity-containing supercritical CO2 pipeline[J].Oil & Gas Storage and Transportation,2024,43(09):985-994.[doi:10.6047/j.issn.1000-8241.2024.09.003]
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09期
页码:
985-994
栏目:
低碳与新能源
出版日期:
2024-09-25
- Title:
-
Experimental study on the influence of venting on temperature and pressure changes in impurity-containing supercritical CO
2 pipeline
- 文章编号:
- 1000-8241（2024）09-0985-10
- Keywords:
- CCUS; supercritical; CO2 pipeline; impurities; phase change; venting
- 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，得到含杂质超临界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、杂质摩尔分数为1％的CO2管道与杂质摩尔分数为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、杂质摩尔分数为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，而杂质摩尔分数为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。（图9，表3，参24）
- Abstract:
- [Objective] Impurities are inevitably present in CO2 transmitted through pipelines, and these substances have significant impacts on the venting process of supercritical CO2 pipelines, including temperature reductions, pressure drops, and phase changes of the medium inside the pipeline. However, experimental research on the venting of large-diameter industrial-scale supercritical CO2 pipelines remains deficient. [Methods] Utilizing a specially designed experimental setup for throttling and venting impurity-containing supercritical CO2 pipelines, a study was conducted to delve into the influences of different contents of CH4 or N2 on temperature reductions, pressure drops, and phase changes in both the main pipeline and vent piping of the supercritical CO2 pipeline during the venting process. Furthermore, the phase changes of fluid in the main pipeline of the impurity-containing supercritical CO2 pipeline during venting were summarized into trend charts. [Results] During the venting process of the impurity-containing supercritical CO2 pipeline, the mixed impurities significantly affected both the CO2 filling quality and the duration of venting. Moreover, the mixed N2 caused a temperature increase of CO2 after throttling in the venting piping. The mixed CH4 or N2 led to an apparent increase in the minimum temperature of the fluid in the main pipeline during venting, while reducing the radial temperature difference of the fluid in the pipeline. With higher contents of impurities mixed, the minimum temperature of the fluid in the pipeline rose while the radial temperature difference decreased. The positions of the minimum temperature in the main pipeline during venting showed contrasting patterns among the scenarios involving pure CO2, impurities at an amount fraction of 1%, and impurities at an amount fraction of 3%. Specifically, during the CO2 pipeline venting, the minimum temperature occurred at the position farthest from the vent piping in the scenarios of pure CO2 and impurities at an amount fraction of 1%. Conversely, in the scenario with impurities at an amount fraction of 3%, the minimum temperature was observed closest to the vent piping. [Conclusion] The study findings can serve as valuable references for designing venting systems, preventing dry ice formation, and protecting pipes during the venting process of impurity-containing supercritical CO2 pipelines. (9 Figures, 3 Tables, 24 References)
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备注/Memo
胡其会，男，1981年生，副教授，2011年博士毕业于西安交通大学动力工程及工程热物理专业，现主要从事CO2管道输送与安全控制技术方面的研究工作。地址：山东省青岛市黄岛区长江西路66号，266580。电话：18366269061。Email：huqihui@upc.edu.cn
基金项目：国家重点研发计划“战略性科技创新合作”专项“区域二氧化碳捕集与封存关键技术研发与示范”，2022YFE0206800；国家石油天然气管网集团有限公司重大科技攻关课题“超临界CO2管道输送工艺与安全技术研究”，GWHT20220011708。
· Received: 2023-11-29 · Revised: 2023-12-11 · Online: 2024-03-26
更新日期/Last Update:
2024-09-25