掺氢天然气管道输送工艺特性

Process Characteristics of Hydrogen Blend Natural Gas Pipeline Transportation

崔兆雪 田磊 段鹏飞 李璐伶 李玉星 刘翠伟

Zhaoxue Cui Lei Tian Pengfei Duan Luling Li Yuxing Li Cuiwei Liu

中国石油大学（华东） 储运与建筑工程学院，山东 青岛 266580 中国宏观经济研究院，北京 100038 深圳市燃气集团股份有限公司，深圳 518000

College of Pipeline and Civil Engineering，China University of Petroleum（East China），Qingdao Shandong 266580，China Academy of Macroeconomic Research，Beijing 100038，China Shenzhen Gas Corporation Ltd. ，Shenzhen 518000，China

将氢气掺入现役天然气管道中混输是实现氢气大规模、长距离、低成本储运的有效方法，但是氢气的掺入会对天然气管道水力特性和安全等方面造成较大影响。为此，采用SPS软件对不同混氢比（均为摩尔分数）的天然气管道输送工况和泄漏工况进行仿真计算，探究掺氢对天然气管道水力特性、离心压缩机运行特性、泄漏后截断阀压降速率及泄漏量的影响。结果表明，掺入氢气会降低天然气管网的输气效率和压缩机性能，可通过增大压降的方式确保管道输气效率不变；在相同天然气需求下，随混氢比的增大，管道动态压力波动减小；掺氢天然气管道泄漏后，随着混氢比的增加，压降速率和泄漏量均增大,管线截断阀压降速率阈值设定值也要相应增大。该研究成果为确定天然气管道最大混氢比的研究奠定了一定基础，为天然气管道掺氢输送工艺的确定提供了有效借鉴。

Mixing hydrogen into natural gas pipelines for transportation is an effective way to achieve large?scale,long?distance, and low?cost transportation of hydrogen.However, the mixing of hydrogen will have a great impact on the hydraulic characteristics and safety of natural gas pipeline during transportation.In this regard,SPS software was used to simulate the transportation and leakage conditions of natural gas pipelines with different hydrogen mixing ratios, in order to investigate the effects of hydrogen mixing on the hydraulic characteristics of natural gas pipelines,the operating characteristics of centrifugal compressors,and the pressure drop rate of block valve and leakage after leakage.The results show that adding hydrogen will reduce the gas transmission efficiency of the natural gas pipeline network and compressor performance,which can be compensated by increasing the pressure drop.The dynamic pressure amplitude decreases with the increase of hydrogen mixing ratio under the same natural gas output.When the hydrogen mixed natural gas pipeline leaks,the pressure drop rate and the leakage would increase as the increasing of hydrogen mixing,and the set value of the pressure drop rate threshold of the pipeline block valve also increases accordingly.In conclusion,the research results in this work can provide the basis for the research on determining the maximum of hydrogen mixing ratio in the natural gas pipeline and provide a reference for the determination of hydrogen mixing transportation technology in natural gas pipelines.

国家自然科学基金(51704317);山东省重点研发计划(2019GSF111026);中石油科技创新基金(2018D?5007?0603);广东省重点研发计划(2019B111102001);国家发展和改革委员会能源研究所咨询项目“天然气高效输运利用及其技术装备创新支撑研究”(A31?2019)

10.3969/j.issn.1006-396X.2021.06.013