中文摘要：

在一维沉降炉中进行了生物质（麦秆、木屑）与煤粉的纯烧、混烧实验,并研究了燃料种类、混燃比例、空气分级等不同因素对燃烧产生的NO和CO含量沿烟气流动方向的分布规律以及飞灰含碳量的影响。结果表明：纯烧生物质和煤粉时,NO含量沿烟气流动方向先增大后减小,煤粉燃烧产生的NO含量大约是麦秆和木屑燃烧产生的2~3倍;煤粉燃烧产生的CO含量随烟气流动先增加后减少,而生物质燃烧产生的CO含量则逐渐减小;分级风量的增加并不能改变沿烟气流动方向上NO和CO含量的变化趋势,但能对燃煤产生的NO具有较强的减排能力。当生物质与煤粉混燃时,NO排放量随麦秆混合比例的增加而逐渐减小,但当混合比例增至40%以后,继续增大生物质比例对NO减排作用影响很小;当麦秆比例达到40%以上、分级风量达到20%时,空气分级对NO减排的影响较小。

英文摘要：

Combustion of biomass （straw and wood） and coal was investigated in a drop tube furnace. Moreover,factors like mixing ratio and air staging on emissions of NO and CO along the flue gas flow direction was analyzed. Also, the unburned carbon content in fly ash was investigated. The results show that, along the flue gas flow direction, the NO concentration increased first and then decreased slowly for pure combustion of both biomass and coal,and the NO emission from straw or wood combustion only accounted for about 1/3 or 1/2 of that from coal combustion. The CO content during coal combustion increased first and then decreased, while that during the biomass combustion reduced gradually. Increasing the staging air quantity had little influence on variations of the NO and CO concentration but can reduce the NO emission dramatically for coal combustion. For co-combustion of the biomass and coal, the NO emission reduced gradually with the increasing mixing ratio,but when the mixing ratio increased to over 40% ,increasing the biomass proportion had little effect on NO reduction. When the straw＇s proportion and the staging air volume reached over 40% and 20% respectively,staging air had little influence on NO emission.