高温空气烧嘴参数对NO_x排放影响的试验研究  

Experimental Study Concerning the Effect of High Temperature Air Burner Nozzles' Parameters on NO_x Emission in Burners

作　　者：郑暐[1] 朱尚龙[1] 朱彤[1] 

机构地区：[1]同济大学机械工程学院,上海200092

出　　处：《动力工程》2007年第2期287-291,共5页Power Engineering

基　　金：国家自然科学基金资助项目(50206014);上海市曙光计划资助项目(05SG23)

摘　　要：设计合理的烧嘴可以控制空气和燃气的混合,从而控制NOx的排放。对6种不同几何结构烧嘴在不同的燃气流速、过量空气系数、燃气流量以及不同燃气与空气喷口间距下的NOx排放量进行了试验研究。结果表明,燃气射流速度的提高可以减少NOx的排放;在空气射流速度大致相等的各个试验工况中,空气喷口为矩形且矩形短轴指向烧嘴中心的燃气喷口时,NOx排放量最高,空气喷口为圆形时次之,空气喷口为矩形且矩形长轴指向燃气喷口时NOx排放量较低。在试验范围内,过量空气系数提高,NOx的排放增加。Mixing of air and fuel gas and thereby the emission of NOx can be controlled by rationally designed burner nozzles. NOx emission behavior has been experimentally studied with 6 geometrically differently shaped burner nozzles and different fuel gas velocities, excess air coefficients, gas flow rate and for differently distanced gas and air nozzle. Results show that NO, emission can be reduced by increasing the injection velocity of the fuel gas. Experiments, with the air jet velocity approximately kept constant, show that NOx emission is highest for rectangular air nozzle openings, which have their shorter axis pointing towards the gas nozzle＇ s center, somewhat lower if a circular opening is used and lowest in case the rectangular opening has its longer axis pointing towards the gas nozzle. Within the scope of the present experiments it was found thatNOx emission rises with increasing excess air ratio. Figs 7, tables 2 and refs 7.

关 键 词：环境工程学 高温空气燃烧 氮氧化物 烧嘴 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]