分析了炉膛结构以及烧嘴布置方式对流场、火焰温度、组分分布和NOx生成量的影响。研究结果表明:当炉膛顶部同时布置烧嘴和排烟口时,燃烧主射流对炉膛排烟的卷吸将降低助燃空气射流中的氧气浓度和燃气射流中的可燃物浓度,进而降低氮氧化物的排放;此外,NOx排放量同烟气在炉内停留时间有关,其浓度将沿烟气流程逐渐增加。 The influences of the furnace structure and burner arrangement on the flow field, flame temperature, composition distribution and NOx production were analyzed. The results show that when the burner and the exhaust port are arranged at the top of the furnace, the entrainment of the combustion main jet to the exhaust of the furnace reduces the oxygen concentration in the combustion air jet and the concentration of combustibles in the gas jet, thereby reducing nitrogen oxides Emissions; In addition, NOx emissions and flue gas residence time in the furnace, the concentration will gradually increase along the flue gas flow.