【CCUS及氢能专题】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
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- 引用格式:
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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.【CCUS及氢能专题】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.doi:10.3969/j.issn.1006-5539.2024.02.007
CHEN Junwen, REN Lixin, TANG Xiaoyong, CHEN Feng, LI Tianlei, WANG Jing, ZHANG Shuanglei.Discussion on the process safety issues of hydrogen and hydrogen-blended natural gas pipelines based on the law of thermodynamics[J].Natural Gas and Oil,2024,42(2):47-54.doi:10.3969/j.issn.1006-5539.2024.02.007
- DOI:
- 10.3969/j.issn.1006-5539.2024.02.007
- 作者:
- 陈俊文1 任立新2,3 汤晓勇1 陈凤1 李天雷1 王静1 张双蕾1 昝林峰1 王清扬1
CHEN Junwen1, REN Lixin2,3, TANG Xiaoyong1, CHEN Feng1, LI Tianlei1, WANG Jing1, ZHANG Shuanglei1,
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司, 四川 成都 610041; 2. 中国石油国际勘探开发有限公司, 北京 100034; 3. 中国石油勘探开发研究院, 北京 100083
1. CPECC Southwest Company, Chengdu, Sichuan, 610041, China; 2. China National Oil and Gas Exploration and Development Corporation Ltd., Beijing, 100034, China; 3. Research Institute of Petroleum Exploration & Development, Beijing, 100083, China
- 关键词:
- 氢气;掺氢天然气;热力学影响;工艺安全;探讨
Hydrogen; Hydrogen-blended natural gas; Impact of the law of thermodynamics; Process safety; Discussion
- 摘要:
天然气管道中掺入氢气输送或纯氢输送是推进氢能大规模利用的有效途径。由于氢气与天然气物性存在较大区别,氢气与掺氢天然气管道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,也建设了部分代表性的氢气管道,但尚未完全结合氢气物性对工艺安全问题进行深入研究,氢气与掺氢天然气管道的工艺安全问题值得进一步探讨。借鉴天然气管道设计与运行场景,从热力学对氢气与掺氢天然气物理特性的影响出发,对氢气与掺氢天然气管道工程设计面临的关键问题进行了梳理,通过理论分析与模拟研究探讨了热力学对管道工艺安全的影响规律,提出了工程设计的建议。研究表明：在相同压力下,较低的运行温度将增大氢气与掺氢天然气的绝热系数,导致泄漏质量流量升高;在相同泄漏场景下,较低的运行温度对泄漏后介质的热辐射、水平扩散和爆炸均具有正向提升作用;现有标准规范提出的潜在影响半径评价方法未充分考虑温度的影响,实际工程精细化评价中宜进一步考虑;紧急泄放下,氢气设备将面临更低的介质温度。研究成果为后续氢气与掺氢天然气管道的工程设计提供了借鉴。
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.
