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中文摘要：
燃煤过程中产生的细微颗粒物,因严重威胁到人类的健康,其生成和控制受到越来越多的关注.混煤燃烧被认为是一种可有效减少电厂燃煤过程中细微颗粒物生成的控制手段.将具有不同矿物组成的褐煤和烟煤进行不同混合比例（9：1,7：3,5：5,3：7,1：9）和不同燃烧气氛下（O2/N2和O2/CO2）的沉降炉燃烧实验,通过对其燃烧生成的颗粒物进行质量粒径分布、生成浓度、元素组成和形貌成分等分析,研究了不同燃烧气氛下混煤燃烧对颗粒物生成特性的影响.煤粉燃烧生成的颗粒物由具有13级粒径分级功能的低压撞击器（LPI）进行收集.研究结果表明,两种实验煤粉混合燃烧后,PM1的生成相比于通过两种单一煤种加权平均得到的计算值有不同程度的减少,说明来自不同煤种的矿物之间的交互作用抑制了燃煤过程中PM1的生成.煤粉混合比例对PM1生成的抑制程度有重要影响,在本实验研究中,当褐煤与烟煤的混合质量比为7：3时,PM1的生成所受抑制程度最大.O2/CO2气氛对混煤燃烧过程细微颗粒物的生成特性有影响,相比于O2/N2燃烧气氛,O2/CO2燃烧气氛下,混煤燃烧后矿物交互作用减弱,PM1的生成所受抑制程度下降.与计算值相比,混煤燃烧后PM1中的Ca,Fe元素生成浓度和质量百分数均减少,而PM10＋中Ca,Fe,Si,Al元素生成浓度增多,烟煤中所含的大量硅铝酸盐与褐煤燃烧过程中生成的含Ca,Fe等细颗粒物的交互作用是混煤后PM1生成减少的主要途径.
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