在役气田集输管道改输氢气放空过程关键问题探讨
Discussion on key issues in the venting process for the in-service gas field gathering pipelines conversion to hydrogen service
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- 引用格式:
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陈俊文,花争立,汤晓勇,李天雷,杨劲松,朱红钧,韩辉,李鑫.在役气田集输管道改输氢气放空过程关键问题探讨[J].天然气与石油,2025,43(5):42-49.doi:10.3969/j.issn.1006-5539.2025.05.006
CHEN Junwen, HUA Zhengli, TANG Xiaoyong, LI Tianlei, YANG Jinsong, ZHU Hongjun, HAN Hui, LI Xin.Discussion on key issues in the venting process for the in-service gas field gathering pipelines conversion to hydrogen service[J].Natural Gas and Oil,2025,43(5):42-49.doi:10.3969/j.issn.1006-5539.2025.05.006
- DOI:
- 10.3969/j.issn.1006-5539.2025.05.006
- 作者:
- 陈俊文1,2 花争立3 汤晓勇2 李天雷2 杨劲松2 朱红钧4 韩辉5 李鑫6
CHEN Junwen1,2, HUA Zhengli3, TANG Xiaoyong2, LI Tianlei2, YANG Jinsong2, ZHU Hongjun4, HAN Hui5, LI Xin6
- 作者单位:
- 1. 浙江大学工程师学院, 浙江 杭州 310015; 2. 中国石油工程建设有限公司西南分公司, 四川 成都 610041; 3. 浙江大学化工机械研究所, 浙江 杭州 310027; 4. 西南石油大学石油与天然气工程学院, 四川 成都 610500; 5. 中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580; 6. 杰斯康软件(上海)有限公司, 上海 200090
1. Polytechnic Institute, Zhejiang University, Hangzhou, Zhejiang, 310015, China; 2. CPECC Southwest Company, Chengdu, Sichuan, 610041, China; 3. Institute of Chemical Machinery, Zhejiang University, Hangzhou, Zhejiang, 310027, China; 4. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan, 610500, China; 5. College of Pipeline and Civil Engineering, China University of Petroleum(East China), Qingdao, Shandong, 266580, China; 6. Gexcon Software(Shanghai) Co., Ltd., Shanghai, 200090, China
- 关键词:
- 氢气;在役气田集输管道;改输;放空系统;探讨
Hydrogen; In-service gas field gathering pipelines; Conversion; Venting system; Discussion
- 摘要:
氢能将对未来能源替代起关键的促进作用,相比新建纯氢管道或天然气管道掺氢输送,利用在役气田集输管道改输氢气具有灵活利用管道资产、促进氢能高效利用、完善能源替代等优点,在役气田集输管道改输氢气在钢级适应性、就近制取消纳匹配性上具有优势。在役气田集输管道改输氢气后放空系统适应性分析是改输评价的关键之一。借鉴天然气管道设计与运行场景,基于氢气与天然气的特性比对,以在役气田集输管道改输氢气为研究对象,梳理了在役气田集输管道改输氢气的放空系统评价技术要点,开展了计划性放空泄放体积流量与泄放低温、放空过程自燃、燃爆尺度与防治、放空立管安全保障性能等关键问题分析。研究表明,在役气田集输管道改输氢气后的泄放压力可能超过原运行压力;已设置的泄放调节阀可提高氢气泄放能力,干线管道内部温降尺度与改输前变化不大,但可明显缓解放空系统内的低温问题;放空系统自燃、爆燃风险提升,爆轰超压尺度约为天然气爆轰超压尺度的15倍;放空立管对改输后噪声、热辐射的适应性较好。研究成果可为在役气田集输管道改输氢气评价提供借鉴。
Hydrogen energy is an important component of the future national energy system and will play a key role in promoting energy substitution. Compared with the construction of new pure hydrogen pipelines or hydrogen-blended natural gas pipelines, converting in-service gas field gathering pipelines to transport hydrogen offers advantages such as flexible utilization of pipeline assets, promoting efficient use of hydrogen, and enhancing energy substitution. Such conversion also has benefits in terms of steel grade adaptability and the matching of nearby hydrogen production with local consumption. The adaptability analysis of the venting system after conversion of in-service gathering pipelines is one of the key aspects of conversion evaluation. Drawing on the design and operational scenarios of natural gas pipelines, and based on a comparison of the physical characteristics of hydrogen and natural gas, this study takes the conversion of in-service gas field gathering pipelines to hydrogen transportation as the research object, sorts out the technical points of venting system evaluation, and analyzes key issues including planned venting discharge capacity and associated low temperatures, autoignition during venting, deflagration and explosion scale and mitigation, and the safety performance of venting risers. The study shows that the discharge pressure of the gas gathering and transportation pipeline after conversion may exceed the original operating pressure. The existing discharge regulating valve can improve the hydrogen venting capacity, and the magnitude of temperature drop within the trunk pipeline shows little change compared with pre-conversion conditions, but it can significantly alleviate the low temperature issue inside the venting system. However, the potential risk of autoignition and deflagration in the venting system increases after conversion, with the detonation overpressure reaching up to about 15 times that of natural gas. The venting riser exhibits better adaptability in terms of noise and thermal radiation performance. The research results of this paper provide reference for the safety evaluation of hydrogen transportation through converted in-service gas field gathering pipelines.
