中文摘要：

煤与生物质混烧是一种减少发电过程中污染物及温室气体排放的有效手段,随着雾霾问题的日益突出,在此过程中特别需要关注其颗粒物的排放问题。在沉降炉中开展了一种典型准东煤与稻壳混烧过程中颗粒物的生成特性研究。实验温度为1300℃,稻壳与准东煤的混配比例分别为7.5%、12.5%和20%。燃烧生成的颗粒物被低压撞击器（LPI）收集,其成分使用SEM-EDS进行测定。实验结果表明,准东煤燃烧时亚微米颗粒物（PM_1）的主要成分是Na、Mg、Ca、Fe、S,PM_（1-10）主要成分是Ca,而稻壳的PM_1主要成分是K、Cl、P,PM_（1-10）的主要成分是Si。在稻壳比例为12.5%和20%时,混烧减少了单位灰质量的PM_1生成量,原因在于2种燃料中的矿物质与燃烧过程中释放的易气化元素（Na,Mg,K）有交互作用。混烧时单位灰质量的超微米颗粒物（PM_（1-10））的生成量与2种燃料单独燃烧生成的PM_（1-10）的线性加和相当,且随着稻壳比例的增加而减少。

英文摘要：

Co-combustion of coal and biomass is an effective way to reduce the emission of pollutant and greenhouse gas during power generation. It is of particular importance to concern the particulate matter（PM） emission during this process, as the hazy weather becomes more and more serious in China. Experiment was conducted on a drop tube furnace to study the PM formation characteristics during co-combustion of a typical Zhundong coal and rice husk. The furnace temperature is 1300 ℃, and rice husk was blended with Zhundong coal at ratios of 7.5%, 12.5% and 20%, respectively. The PM produced was collected by a low pressure impactor（LPI）, and its composition was analyzed by SEM-EDS. The results show that the main composition of submicron particulate matter（PM_1） produced by Zhundong coal consists of Na, Mg, Ca, Fe and S, and Ca is the main composition of super-micron particulate matter（PM_（1-10））. While for rice husk, the PM_1 mainly consists of K, Cl, P, and PM_（1-10） is dominated by Si. The amount of PM_1 in per unit mass was reduced during co-combustion when the ratio of rice husk was at 12.5% and 20%. And it was attributed to the interactions between the minerals in these two fuels and the vaporized elements（Na, Mg and K） released from the fuels. The PM_（1-10） produced in per unit mass ash during co-combustion is almost equal to the value calculated from the two fuels when they combusted alone, and its amount decreases as the ratio of rice husk increases.