摘要
利用多引射器混合结构实现燃气和空气的完全混合,设计了平板式预混燃烧器,研究了燃烧器污染物排放特性与空气系数、喷嘴直径、热负荷比的关系.实验结果表明:平板式预混燃烧器实现了NO和CO的低排放;NO和CO的排放量随着空气系数的增大而减小;喷嘴直径越大,燃气和空气接触面越大,混合效果越好,CO的排放量越小;当空气系数为1.25时,全预混燃烧器烟气中折算为空气系数为1时NO排放为40×10-6,达到了氮氧化物的第5排放等级.
To realize the premixing of gas and air using muti-ejector, a flat plate premixed burner was proposed. The effects of air coefficient, nozzle diameter and thermal load ratio on the pollutant emission of burner were experimen- tally studied. It is found that lower NO and CO emissions of the designed flat plate premixed burner are realized. NO and CO emissions decrease with the increase of air coefficient. The larger the diameter of the nozzle, and the greater the gas and air contact surface, the better mixing effect and the smaUer amount of CO emissions will be realized. When air ratio is 1.25, NO emission is 40 x 10-6, which reaches the fifth grade of NO emission.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2013年第2期187-191,共5页
Journal of Combustion Science and Technology
关键词
平板式
预混燃烧
引射器
燃烧器
flat plate
premixedcombustion
ejector
burner
