Analysis of mixed combustion characteristics and emissions of hydrogen and natural gas under MILD condition

被引：0
|
作者：
Teng L. [1 ]
Li X. [1 ]
Wu Y. [2 ]
Liu B. [2 ]
Wang L. [2 ]
Li W. [1 ]
机构：
[1] College of Chemical Engineering, Fuzhou University, Fuzhou
[2] School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2022年 / 43卷 / 10期
关键词：
Combustion characteristics; Computational fluid dynamics; Hydrogen; Natural gas; Nitrogen oxides emissions;
D O I：
10.19912/j.0254-0096.tynxb.2021-0294
中图分类号：
学科分类号：
摘要：
To address the using problem that the combustion efficiency and Nitrogen Oxides (NOx) emission of Natural Gas (NG) after hydrogen doping (H2) are less studied, using the component transport model, Eddy Dissipation Concept (EDC) combustion model and Do radiation model, at same time combining with the GRI-22 chemical reaction mechanism, to establish a soft (MILD, moderate or intense low oxygen dilution) combustion simulation model is established. The reliability of the model is verified by comparing it with the experimental results, and the model is further applied to analyze the effects of different hydrogen doping ratios on the combustion characteristics. The results show that with the increase of hydrogen doping ratio, the mixing degree of fuel and oxidant gradually increases, and the radial component of mixed gas decreases; due to the increase of reaction rate and exothermic rate, the temperature inside the burner increases, and the thermal NOx content increases, mainly concentrated in the back end of the burner; the increase of fuel inlet speed leads to incomplete combustion inside the burner, the temperature at the outlet decreases, the oxygen concentration increases and the NOx content decreases. It is found that hydrogen blending in natural gas is more favorable to achieve MILD combustion conditions. © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：465 / 471
页数：6
相关论文
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