天然气与石油2025，Vol.43Issue(5)：42-49,8.DOI:10.3969/j.issn.1006-5539.2025.05.006
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
摘要
Abstract
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.关键词
氢气/在役气田集输管道/改输/放空系统/探讨Key words
Hydrogen/In-service gas field gathering pipelines/Conversion/Venting system/Discussion引用本文复制引用
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):42-49,8.基金项目
国家重点研发计划"纯氢/掺氢长距离管输工艺及大流量掺氢与分离装备"(2022YFB4003403) （2022YFB4003403）
国家重点研发计划"高压纯氢/掺氢管道及关键设备运维安全保障技术"(2022YFB4003404) （2022YFB4003404）
中国石油工程建设有限公司重点课题"在役集输管道转纯氢输送适应性评价技术研究"(CPECC2023KJ04) （CPECC2023KJ04）
中国石油工程建设有限公司青年科技专项"在役集输管道灵活改输典型新能源介质关键技术研究"(CPECC25QNKJ03) （CPECC25QNKJ03）
