| 摘要: |
| 目的 天然气管道掺氢输送是实现氢能大规模应用的主要方法之一，而静态掺氢混合器是将氢气和天然气均匀混合的关键设备，通过数值模拟分析静态掺氢混合器的掺混性能，对于混合器的改进和优化具有重要意义。方法 基于掺混均匀度和压降水平的评价指标分析了不同结构掺氢混合器的掺混性能。结果 采用封堵氢气注入弯管出口并且在环向上设置注气孔的方法可以有效提高掺氢天然气的混合均匀度；相比于其他结构，SK型混合器的掺混性能更优，其压降为69.88 kPa，综合混合系数为1.328；掺氢混合器的长度和扭角对掺混性能的影响较为显著，厚度的影响相对较小；串联混合器对掺混效果有较大影响。结论 在混输管道中，当SK型混合器的扰流元件长度为750 mm，厚度为7 mm，扭角为180°，串联数量为3时，掺混性能最优。 |
| 关键词: 掺氢天然气 静态混合器 掺混性能 结构优化 |
| DOI：10.3969/j.issn.1007-3426.2025.03.010 |
| 分类号: |
| 基金项目:中国石油西南油气田公司博士后基金“掺氢管道输送过程中氢浓度场分布规律及均匀整流技术研究”（20230312-10） |
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| Mixing performance analysis and structure optimization design of static hydrogen-blended mixer |
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BAN Jiuqing1,2, WANG Xin1, JIA Ning3, HUA Jie2, YU Cheng4, HAN Chuanjun1, WANG Xiaodong5
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1.Southwest Petroleum University, Chengdu, Sichuan, China;2.Research Institute of Natural Gas Technology PetroChina Southwest Oil and Gasfield Company, Chengdu, Sichuan, China;3.Northwestern Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, Jiangyou, Sichuan, China;4.Chengdu Technological University, Chengdu, Sichuan, China;5.PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China
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| Abstract: |
| Objective Hydrogen-blended transportation in natural gas pipelines is one of the main methods to realize the large-scale application of hydrogen energy, and a static hydrogen-blended mixer is the key equipment to evenly mix hydrogen and natural gas. It is of great significance to analyze the mixing performance of a static hydrogen-blended mixer by numerical calculation method for the improvement and optimization of the mixer. Method Based on the evaluation indexes of mixing uniformity and pressure drop level, the mixing performances of different-structure hydrogen-blended mixers were analyzed. Result The mixing uniformity of hydrogen-blended natural gas could be improved effectively by blocking the outlet of the hydrogen injection pipe and making injection holes around it. Compared with other structures, the mixing performance of the SK mixer is better, its pressure drop is 69.88 kPa, and the comprehensive mixing coefficient is 1.328. The length and twist angle of the hydrogen-blended mixer had a significant influence on the mixing performance, while the thickness had a relatively little influence on the mixing performance. The series mixer had a great influence on the mixing effect. Conclusion In a mixed transportation pipeline, the mixing performance of the SK mixer is the best when the length of the turbulence element is 750 mm, the thickness is 7 mm, the twist angle is 180° and the number of series is 3. |
| Key words: hydrogen-blend natural gas static mixer mixing performance structure optimization |
