化工学报2025，Vol.76Issue(4)：1898-1908,11.DOI:10.11949/0438-1157.20241091
节流作用下CO2管道放空过程的冻堵风险实验研究
Experimental research on risk of freezing and plugging during CO2 pipeline venting under throttling effect
霍军良 1喻健良 2唐治国 1邱宗君 1冯玉华 1蒋旭 1王乐怡 1杨宇 1乔帆帆 2赫一凡2
作者信息
- 1. 中油(新疆)石油工程有限公司设计分公司,新疆 克拉玛依 834000
- 2. 大连理工大学化工学院,辽宁 大连 116024
- 折叠
摘要
Abstract
CO2 pipelines is a key link of CCUS technology,when it encounters leakage,corrosion and other damage,it is necessary to vent the pipeline first to carry out subsequent repair work.In order to ensure the safety of the venting operation,it is necessary to evaluate the potential danger of dry ice generation and the risk of valve freezing during the venting process.In this paper,based on the industrial-scale CO2 pipeline throttling experimental device,two groups of supercritical phase venting experiments with different throttle valve openings were performed.The results showed that during the direct venting process,a dry ice zone(length shorter than 149.2 m,height lower than 58.3 mm)appeared at the injection end of the main pipeline at the later stage of the venting,and that the generated dry ice particles had migration phenomena.The minimum temperature of the vent pipe drops to-23.2℃,and the subzero low temperature continues for 600.4 s.Although the throttling effect can improve the minimum temperature of the dry ice area at the injection end,but dry ice accumulation occurs at the discharge end(the length of the accumulation is shorter than 10.4 m,and the height is lower than 116.5 mm).The throttling effect can reduce the pressure filling level of the vent pipe(pressure reduction of 40%),but will also reduce the temperature drop of the vent pipe(the lowest temperature down to-35.4℃)and increase the potential danger of valve freezing.关键词
安全/二氧化碳/实验验证/节流/干冰冻堵/阀门低温Key words
safety/carbon dioxide/experimental validation/throttle/dry ice freezing blockage/valve low temperature分类
资源环境引用本文复制引用
霍军良,喻健良,唐治国,邱宗君,冯玉华,蒋旭,王乐怡,杨宇,乔帆帆,赫一凡..节流作用下CO2管道放空过程的冻堵风险实验研究[J].化工学报,2025,76(4):1898-1908,11.
