摘要
通过平面激光诱导荧光测量技术对空气加湿和燃料掺氮稀释共同作用下的合成气燃烧特性与火焰结构进行了实验研究。实验结果显示,在干空气工况中,N_2稀释降低了燃烧反应区温度,显著抑制了NO_x的排放,同时,将CO排放保持在低水平。随着加湿量的上升,NO_x排放降低,但在加湿环境中继续进行N_2稀释对进一步减少NO_x排放的效果有限。在高加湿量工况下,虽然NO_x排放降低到5×10^(-4)%左右,但CO排放显著上升。通过平面激光诱导荧光测量发现,在此工况下,火焰温度降低,反应区域严重缩小,燃烧不完全导致了CO排放的上升。
N_2 diluted combustion and steam humidified combustion are both reasonable ways to reduce NO_x emissions in syngas combustor.This paper studies the performance of syngas combustion under the conditions of N_2-diluted fuel together with humidified air.Planar laser induce fluorescence measurement is used to study the flame structure.Experimental results show that in dry air conditions,the temperature of reaction area is lowered by N_2 dilution.Therefore the NO_x emission is decreased evidently and the CO emission remains low.With the increase of humidification,the emission of NO_x decreases,but the further NO_x emission reduction through N_2 dilution is limited.In the high humidification conditions,the NO_x emission remains at 5 ppm.However the CO emission rises significantly.According to the planar laser induce fluorescence measurement,the flame temperature is reduced to a low level and the area of reaction zone is shrunk under this condition.The combustion becomes incomplete and results in a significant increase of CO emission.
出处
《热能动力工程》
CAS
CSCD
北大核心
2017年第11期55-61,共7页
Journal of Engineering for Thermal Energy and Power
