借助数值模拟方法研究了不同气氛、氧浓度以及燃料热值对加热炉燃烧特性以及NOx排放的影响规律.结果表明:富氧燃烧能提高炉膛燃烧温度,使炉壁辐射换热量增加约5.2％,排烟热损失减小约21.7％.相同富氧浓度条件下,空气气氛下炉膛燃烧温度更高,炉壁辐射换热量增加约5％,排烟损失减少24％以上；但O2/CO2气氛下钢坯表面传热特性改善,断面温度分布更加均匀,NOx排放量降低为空气气氛的1/10以下.%The impacts of varies atmosphere, oxygen concentration as well as fuel calorific value to temperature distribution, steel reheating quality and NOx emission were numerically studied. The result shows that oxygen-enriched combustion can enhance the reheating temperature, and the radiation heat flux increases by about 5.2%, and the emission heat loss decreases by about 21.7%. Compared with O2/CO2 of the same oxygen concentration, the furnace temperature gets higher for air atmosphere, and the radiation heat flux increases by about 5%, and the emission heat loss decreases by more than 24%. While for O2/CO2 atmosphere, the steel reheating quality is improved, the cross temperature distribution is more homogenous, and the NOX emission decreases to 1/10 compared to air condition.
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