高炉煤气无焰纯氧燃烧过程数值模拟  

Numerical simulation of flameless oxyfuel combustion using blast furnace gas

作　　者：张炎[1] 曾柱楷 田赛[1] 芮文明 王爱华[1] 

机构地区：[1]东北大学

出　　处：《冶金能源》2017年第1期38-40,44,共4页Energy For Metallurgical Industry

基　　金：国家科技支撑计划项目(2015BAB18B02)

摘　　要：采用ANSYS FLUENT对高炉煤气的无焰纯氧燃烧过程进行数值模拟,获得燃烧反应后燃烧室内的温度场以及组分浓度场。研究结果表明:无焰纯氧燃烧(OF)技术与同等条件下的空气燃烧(AF)相比,火焰区域的温度分布比较均匀,实现了"无焰化",炉内最高温度将近2100K;OF组在整个炉膛轴向范围内NO_x浓度增加缓慢且趋于稳定,OF组中NO_x生成速率及生成量均远低于AF组,无焰纯氧燃烧大幅度降低了NO_x生成。The process for flameless oxyfuel combustion of blast furnace gas was simulated using ANSYS FLUENT. The temperature field and component concentration field in the combustion chamber after combustion reaction were obtained. The results show that by making comparison between flameless oxyfuel combustion （OF） and air combustion （AF） under the same conditions, it could be found that flame temperature distribution is more uniform, noting ＂flameless＂ state is achieved, the maximum temperature of the furnace has reached almost 2100K; In OF group, NOx concentration increases slowly in the entire axial extent of the furnace and tend to stabilizes and NOx formation rate in OF group is lower than that generated in AF group. Flameless oxyfule combustion can effectively reduce NOx production.

关 键 词：高炉煤气 纯氧燃烧 无焰燃烧 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]