天然气与石油2024，Vol.42Issue(2)：47-54,8.DOI:10.3969/j.issn.1006-5539.2024.02.007
基于热力学影响的氢气与掺氢天然气管道工艺安全问题探讨
Discussion on the process safety issues of hydrogen and hydrogen-blended natural gas pipelines based on the law of thermodynamics
摘要
Abstract
Injecting hydrogen into natural gas pipelines for transportation or pure hydrogen transportation is an effective way to promote large-scale utilization of hydrogen energy.Since the physical properties of hydrogen and natural gas are quite different,the operational safety of hydrogen pipelines or hydrogen-blended natural gas pipelines is an unavoidable issue.In recent years,preliminary theoretical research on hydrogen-blended transportation via natural gas pipelines,analysis of the impact of transportation processes,receiving terminal adaptability and low-pressure pilot tests have been carried out at home and abroad.Some representative hydrogen pipelines have also been built,but the impact of hydrogen physical properties on process safety issues has not yet been fully studied.Hence,the process safety issues of hydrogen pipelines and hydrogen-blended natural gas pipelines deserve further discussion.Based on the design and operation scenarios of natural gas pipelines,starting from the impact of thermodynamics on the physical properties of hydrogen and hydrogen-blended natural gas,the key issues faced in the design of hydrogen and hydrogen-blended natural gas pipeline projects were sorted out.Through theoretical analysis and simulation study,the impact of thermodynamics on process safety in pipeline design was discussed.The process safety assurance requirements put forward the relevant key considerations and directions in engineering design.The research shows that under the same pressure,a lower operating temperature will increase the adiabatic coefficient of hydrogen and hydrogen-blended natural gas,resulting in an increase in the leakage mass flow rate.Under the same leakage scenario,a lower operating temperature will have a positive impact on the thermal radiation after leakage,horizontal diffusion and explosion.The potential radius of influence method proposed by the existing codes and standards does not fully consider the influence of temperature,which should be accounted for in the refined evaluation of actual projects.Under emergency release,equipment containing hydrogen will experience lower medium temperature.The research results provide reference for subsequent hydrogen-related pipeline projects.关键词
氢气/掺氢天然气/热力学影响/工艺安全/探讨Key words
Hydrogen/Hydrogen-blended natural gas/Impact of the law of thermodynamics/Process safety/Discussion引用本文复制引用
陈俊文,任立新,汤晓勇,陈凤,李天雷,王静,张双蕾,昝林峰,王清扬..基于热力学影响的氢气与掺氢天然气管道工艺安全问题探讨[J].天然气与石油,2024,42(2):47-54,8.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科研课题"在役集输管道转纯氢输送适应性评价技术研究"(CPECC2023KJ04) （CPECC2023KJ04）
