将收缩扩张结构用于燃烧器空气通道，通过喉部变压卷吸炉膛中的大量烟气来实现低氧燃烧，同时用该方法对常规燃烧器进行了改进和优化，并借助Fluent软件对优化前后的燃烧器进行了模拟计算，结果表明：优化后的燃烧器使得火焰体积扩大，炉膛的平均温度升高而局部高温区域减少，氮氧化物的生成量大幅降低，减少了污染。
The air channels of the burner is designed as constrictionzoom structure which can suction exhausted gas by pressure swing, as a result, lowoxygen combustion is achieved and structure of normal burner is optimized. By using Fluent, numerical simulation of this optimization is calculated. The results show that optimized burner can enlarge the volume of the flame. Mean temperature of furnace rises while the number of partial high temperature zones decreases. Nitrogen oxides fall sharply, which reduces pollutant emissions apparently.
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