【氢能】掺氢天然气非预混燃烧特性实验研究
Experimental study on non-premixed combustion characteristics of hydrogen-blended natural gas
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- 引用格式:
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陈石义,何松,肖娟,王斯民,廖勇.【氢能】掺氢天然气非预混燃烧特性实验研究[J].天然气与石油,2024,42(5):88-96.doi:10.3969/j.issn.1006-5539.2024.05.013
CHEN Shiyi, HE Song, XIAO Juan, WANG Simin, LIAO Yong.Experimental study on non-premixed combustion characteristics of hydrogen-blended natural gas[J].Natural Gas and Oil,2024,42(5):88-96.doi:10.3969/j.issn.1006-5539.2024.05.013
- DOI:
- 10.3969/j.issn.1006-5539.2024.05.013
- 作者:
- 陈石义1 何松2 肖娟2 王斯民2 廖勇3
CHEN Shiyi1, HE Song2, XIAO Juan2, WANG Simin2, LIAO Yong3
- 作者单位:
- 1. 浙江能源天然气集团有限公司, 浙江 杭州 310012; 2. 西安交通大学化学工程与技术学院, 陕西 西安 710049; 3. 中国石油工程建设有限公司西南分公司, 四川 成都 610041
1. Zhejiang Energy Gas Co., Ltd., Hangzhou, Zhejiang, 310012, China; 2. School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China; 3. CPECC Southwest Company, Chengdu, Sichuan, 610041, China
- 关键词:
- 掺氢天然气;贫燃;非预混;当量比;钝体;污染物排放
Hydrogen-blended natural gas; Lean combustion; Non-premixed; Equivalence ratio; Bluff body; Pollutant emissions
- 摘要:
以天然气掺氢技术为背景,构建一种非预混钝体同轴燃烧器及实验系统,测试了掺氢天然气(主要成分CH4)在不同燃料流速、掺氢比及当量比的火焰结构和污染物排放浓度,并考察了内构件对燃烧性能的影响。结果表明,掺氢后火焰高度降低,CO排放浓度降低,但NOx排放浓度增加。当掺氢比达到80%时,与纯CH4相较，CO排放浓度降低93.5%,NOx排放浓度增加1倍左右。随着燃料流速增加,火焰逐渐变长变宽,CO与NOx排放浓度均增加;当量比＜0.7时,随着当量比增加,燃烧室热损失降低,平均温度升高,CO排放浓度降低,而NOx排放浓度增加;不同内构件的掺氢CH4燃烧性能差异较大,钝体—旋流内构件不仅可以降低51.9%的NOx排放浓度,还可以增强燃烧的均匀程度及稳定性。研究结果对同轴燃烧器的设计、优化和应用具有参考意义,有助于推动天然气掺氢技术的发展。
A non-premixed bluff body coaxial burner and experimental system were developed to investigate the flame structure and pollutant emissions of hydrogen-blended natural gas, which is predominantly composed of CH4, at different fuel flow rates, hydrogen blending ratios and equivalence ratios, against the background of hydrogen-blended natural gas technology. Additionally, the impact of internal components of the burner on combustion performance was examined. The results show that after the injection of hydrogen, the flame height decreases and concentration of CO emission is reduced, while concentration of NOx emission increases. When the hydrogen blending ratio reaches 80%, concentration of CO emission is reduced by 93.5%, and concentration of NOx emission approximately doubles. As the fuel flow rate increases, the flame gradually becomes longer and wider, and the concentrations of both CO and NOx emission have increased. When the equivalence ratio is less than 0.7, as the equivalence ratio increases, the heat loss in combustion chamber decreases, the average temperature rises, the concentration of CO emission decreases, and the concentration of NOx emission increases. The study also reveals that there are significant differences in the combustion performance of hydrogen-blended CH4 among different internal components of the burner. In addition to reducing concentration of NOx emission by 51.9%, the bluff body-swirler internal component also enhances combustion uniformity and stability. The research findings can offer valuable reference for design, optimization and application of coaxial burners, and contribute to the further advancement of hydrogen-blended natural gas technology.
