Abstract: The numerical simulation of temperature distribution and NO emission in furnace during baking of an 120 t AOD unit by using new regenerative baker for AOD has been carried out. And the effects of temperature of preheated air (1273~1473 K) and distance L between air inlet and fuel gas jet (0.28~0.51m) on flow field, temperature field and NO emission are analyzed. Results show that with increasing L value, the highest temperature in furnace decreases, the temperature difference of gas decreases and the amount of generating NO decreases ； with increasing preheated temperature, the temperature of gas in furnace increases and the NO content in reacting region increases. It shall meet the requirement for preheated temperature of air being 1273 K.

Key words: AOD, Regenerative Baking, Temperature Distribution, NO Emission, Numerical Simulation

摘要： 采用新型AOD蓄热式烘烤器对120 t AOD设备烘烤过程炉内温度分布和NO排放量进行了数值模拟,分析了空气预热温度(1273～1473 K)、空气进口与燃气人口间的相对距离L(0.28～0.51 m)对流场、温度场和NO排放的影响。结果表明,随L值增加,炉内最高温度下降,气体温度均匀性提高,NO生成量降低;空气预热温度提高,炉内气体温度升高,反应区NO含量升高。空气预热温度1273 K即可满足要求。

关键词: AOD, 蓄热式烘烤, 温度分布, NO排放量, 数值模拟