摘要
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NO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,NO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 temp- erature, and the radiation heat flux increases by about 5.2%, and the emission heat loss decreases by about 21.7%. Compared with OJCO2 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 OJCQ 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.
出处
《工业加热》
CAS
2013年第2期3-7,共5页
Industrial Heating
基金
国家自然科学基金资助项目(No.50936001)
关键词
加热炉
低热值煤气
富氧燃烧
O2/CO2气氛
NO排放
数值模拟
reheating furnace
low calorific gas
oxygen-enriched combustion
O2/C02 atmosphere
NOx emission
numerical simulation
