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中文摘要：
采用沉降炉研究了煤粉粒径及燃烧工况（包括不同温度和气氛等）对可吸入颗粒物粒径分布的影响．实验煤种为六盘水烟煤，分为三种煤粉粒径，在两种燃烧气氛和三种温度下，在沉降炉中进行燃烧．实验用低压撞击器（LPI）按不同粒径从0．03μm～10μm分为13级，分别采集燃烧后的可吸入颗粒物．分析结果显示，煤粉粒径和燃烧工况是影响PM10的粒径分布的重要因素；PM10粒径分布呈双峰分布，两峰值对应不同的生成机理；随着温度升高和含氧量增加，PM10排放浓度大幅增加；粒径小于63μm的煤粉排放PM10较多，相比之下，粒径为100μm～200μm和63μm～100μ煤粉燃烧生成的PM10粒径分布的差异不明显．
英文摘要：
ABSTRACT Pulverized coal samples were burnt in a laboratory-scale drop tube furnace （DTF） to study the effects of coal particle size and combustion conditions （temperature and combustion atmosphere） on PM10 emission. Liupanshui coal was used in the present study and the coal was divided into three sizes by laboratory standard sieves. The different size fractions were subjected to combustion under different combustion conditions in the DTF. Particulate matter （PM10） was collected and size-segregated into different sizes ranging from 10.0μm down to 0. 03 μm by a low-pressure impactor （LPI）, which is composed of 13 stages. The results indicate that both coal particle size and combustion conditions affecte PM10 emission significantly during coal combustion：the emitted PM〉 have a bimodal distribution having two peaks around 0.1 μm and 4.0μm,produced by two dominant mechanisms ;increasing temperature and oxygen content led to formation of more PM10〉; for coals of 63 μm-100 μm, the resultant PM10 have the similar distribution to that for coals of 100 μm-200 μm,in contrast, combustion of coals of 〈63 μm resulte in the great increase of PM10.
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