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天然气掺氢对管输工艺安全影响的探讨 被引量:7

Study on the impact of hydrogen-blended natural gas on process safety of pipeline transmission
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摘要 天然气管道中掺入氢气输送是推进氢能大规模利用的有效途径,而氢气掺入天然气后的运行安全是不可回避的问题。近年来,国内外开展了天然气管道掺氢输送的前期理论研究、输送工艺影响分析、末端适应性与低压先导试验,但尚未完全结合长输管道系统特点对掺入氢气后管道系统的技术安全相关适应性进行深入研究。基于氢气、天然气的物理特性,开展了天然气掺氢管道工程设计关键参数确定方法的讨论,结合工程设计关注场景进行了天然气掺氢对管道输送关键工艺安全影响的探讨,提出了工程设计的相关建议。研究表明,天然气掺氢后,混合介质的最小点火能、爆炸下限、焦耳—汤姆逊效应等降低,泄漏趋势升高;掺氢天然气泄漏后热辐射范围、潜在影响半径等随氢气掺混比例升高而减小或降低,绝热泄放后温度、泄漏体积流量、冲蚀指数、泄漏扩散范围、可燃气体检测指标等随氢气掺混比例升高而增大或提高,工程实施时应予以甄别与重视。研究成果可为后续天然气掺氢管道工程提供借鉴。 Incorporating hydrogen into natural gas pipelines is an effective way to promote the large-scale utilization of hydrogen energy. The operational safety of hydrogen-blended natural gas is an unavoidable problem. In recent years, the preliminary theoretical research, analysis of the impact of the transmission process, terminal adaptability and low-pressure pilot tests on hydrogen-blended natural gas pipelines have been carried out at home and abroad, but the technical safety-related adaptation of the hydrogen-blended system has not been fully integrated with the characteristics of the long-distance pipeline system. Based on the physical properties of hydrogen and natural gas, the method for determining the key parameters of hydrogen-blended natural gas pipeline engineering design is discussed, and the impact of hydrogen-blended natural gas on the safety of key pipeline transportation processes is discussed in combination with the engineering design concerns, and relevant suggestions for engineering design are put forward. The research shows that the minimum ignition energy, the lower explosion limit and the Joule-Thomson effect of the mixed medium are reduced and the leakage trend is increased after the natural gas is blended with hydrogen;the post-leakage thermal radiation range and potential impact radius of hydrogen-blended natural gas decreases with increasing hydrogen blending ratio. The temperature, leakage volume flow rate, erosion index, leakage diffusion range and combustible gas detection index after the adiabatic release increase with the increase of hydrogen blending ratio. hence, attention shall be paid to the implementation of the project. The research results of this paper provide reference for the hydrogen-blended natural gas pipeline project in the future.
作者 陈俊文 汤晓勇 陈情来 陶科宇 谌贵宇 李天雷 CHEN Junwen;TANG Xiaoyong;CHEN Qinglai;TAO Keyu;SHEN Guiyu;LI Tianlei(CPECC Southwest Company,Chengdu,Sichuan,610041,China;CPECC Engineering Technology R&D Center,Beijing,100120,China;Northeast Sichuan Gas Mine,PetroChina Southwest Oil and Gasfield Company,Chongqing,635000,China)
出处 《天然气与石油》 2022年第4期16-22,共7页 Natural Gas and Oil
基金 中国石油集团工程股份公司支撑课题“含氢输气管道系统关键技术研究”(2019ZYGC-01-09) 中国石油集团工程股份公司支撑课题“氢/氨储运及储存设备关键技术研究”(2021ZYGC-03-01)。
关键词 天然气掺氢 管道输送 工艺安全 探讨 Hydrogen-blended natural gas Pipeline transportation Process safety Discussion
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