论文部分内容阅读
对生物质和煤混烧特性的研究受到国内外学者的广泛重视。对生物质与高硫劣质煤混烧灰的熔融特性进行研究，测量了灰熔点，并利用热重一差示扫描量热（thermo．gravimetry—differentialscanningcalorimetry,TG—DSC）方法对灰的熔融过程进行研究。实验结果表明，混烧生物质能降低灰熔点，生物质混烧比例越高，灰熔点下降幅度越大。由于生物质中灰分含量远小于高硫劣质煤，混烧灰的灰熔点温度主要受煤灰的影响。由于灰的组成成分及其含量的差异，煤灰、生物质灰在实验温度范围，TG—DSC曲线有较大差异。在低混烧比时，混烧灰的TG—DSC曲线基本体现煤灰的熔融特性。随着混烧比例的提高，TG—DSC曲线上生物质的影响变得明显。“,”The study about co-combustion characteristics of biomass and coal has been paid more attention by the domestic and foreign scholars. Fusion characteristics of ash produced by co-combustlon biomass and high-sulfur low grade coal were researched. Ash melting point temperature was measured. The process of ash melting was studied by the method of thermogravimetry-differential scanning calorimetry （TG- OSC）. The results of experiments show that ash melting point temperature drop when co-firing biomass. With the increase of biomass co-combustion ratio, ash melting point temperature drop more obviously. Because the ash content of biomass is much less than high-sulfur low grade coal, ash melting point temperature of co-combustion ash is mainly affected by coal ash. Because the differences of constituent parts and contents of ash, the TG-DSC curves of coal ash and biomass ash in the experimental temperature range are quite different. When biomass co-combustion ratio is low, TG-DSC curves basically reflect fusion characteristics of coal ash. With the increase of biomass co-combustion proportion, the influence ofbiomass on TG-DSC curves become obviously.