研究结果认为：在燃气喷口两侧布置两个矩形空气喷口的烧嘴，氮氧化物排放量低于圆形空气喷口烧嘴；
The results show that NOx emission was abated when the nozzle with two circle air jet was converted into the nozzle with two rectangular air jet.
通过两种结构烧嘴的热态燃烧试验对比，研究了烧嘴结构、燃气射流速度、过量空气系数对高温空气燃烧过程氮氧化物排放的影响特性。
The effects of nozzle structure, fuel gas injection velocity and excess air coefficient on NOx emission in high temperature air combustion were investigated.
汽嘴之上仍用压阀扣上，以保证多余的蒸汽能自由排放。
The pressure limit valve is still used to cover the steam nozzle for ensuring the surplus steam to exhaust freely.
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