超细煤粉快速热解动力学特性实验研究  

Experimental investigation on fast pyrolysis kinetic characteristics of micro-pulverized coal

作　　者：齐永锋[1] 章明川[1] 张健[1] 田凤国[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《化学工程》2009年第3期62-65,74,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(50476018);国家重点基础研究发展规划(973)资助项目(2006CB200303)

摘　　要：采用居里点裂解器及气相色谱仪研究了3种超细煤粉的快速热解特性。实验发现:超细煤粉挥发分的快速热解释放主要发生在升温阶段,烟煤与无烟煤挥发分中焦油的质量分数均最大,其中烟煤焦油释放量占挥发分的质量分数达到50%以上,高于无烟煤。烟煤气态挥发分中CO质量分数最大,达到40%以上,其次为CO2,然后依次为CH4、其他碳氢化合物CnHm,H2。无烟煤的CO,CO2,CH4释放质量分数基本相当,H2质量分数与CnHm接近。根据热解产物的释放数据,采用单方程反应模型计算出了煤粉升温速率、热解频率因子及活化能,为进一步研究超细煤粉的着火及燃烧提供了理论基础。By using Curie point pyrolyzer and gas chromatography, the fast pyrolysis characteristics of three kinds of micro-pulverized coal were investigated. The experiment results show that the mass loss of coal mainly occurs in the temperature-rising stage. The mass fraction of tar in volatiles ranks the first for both bituminous coal and anthracite coal, which exceeds 50% volatiles for bituminous coal and is higher than that for anthracite coal. The mass fraction of CO in gaseous volatiles ranks another first and exceeds 40% for bituminous coal, and that of CO2 ranks the second, then CH4, other hydrocarbons CnHm and H2 are in turn. The mass fractions of CO, CO2 and CH4 are close for anthracite coal, and those of H2 and CnHm are also close. According to the release data of pyrolysis products, the single-equation model was used for calculating the heating rates, the frequency factors and the activated energy, which provides the theoretical foundation for the further research on the ignition and combustion of micro-pulverized coal.

关 键 词：超细煤粉 快速热解 居里点裂解器 频率因子 活化能 

分 类 号：TQ530.2[化学工程—煤化学工程]