【作者】 严帆帆；

【导师】 朱予东；

【作者基本信息】 华北电力大学（河北） ， 热能工程， 2010， 硕士

【摘要】 本文利用热重分析仪对不同生物质、两种不同煤化程度的煤及两者以不同比例混合的混合样品进行了气化实验研究。结果表明,在混合燃料气化过程中,随着稻秆、松木屑及废轮胎在掺混样品中所占比例的增大,其开始气化温度和气化终止温度的提前幅度增大,改善了混合燃料的气化特性;在低温段,生物质和煤共气化过程中存在协同作用。在燃料单独气化过程中,随着升温速率的增大,最大失重速率、最大失重速率对应的峰值温度及失重反应段的温度区间变宽,而反应时间缩短。采用均相反应模型和未反应收缩核模型对所得热重曲线的实验数据进行处理,得到气化反应动力学参数。更多还原

【Abstract】 In this paper, the gasification experiments of kinds of raw materials, including biomass samples, coal with different grade and the mixture samples with different blending ratio, were conducted in situ through thermal gravimetric analysis. It was found that the characteristics of mixture gasification, in situ refer to the staring temperature and the end temperature of reactions, have been proven to be improved owing to increasing the blending ratio of the biomass samples including rice straw, pine sawdust and waste tire; moreover, at the low temperature scale, the synergy effect occurred in the co-gasification of biomass with coal. With the respect of the increase of heating rate, the max weight-loss rate and the peak temperature with max weight-loss rate as well as the range of temperature scale corresponding to weight-loss scale were all shown the positive trend underlying the gasification of either biomass or coal alone, and that a subsequent the reaction time was favorable to reduce. The kinetics were calculated, based on the data of TGA curves, meanwhile, employed the Homogeneous Model and Shrinking Core Model for data analysis.更多还原