生物质与无烟煤混合燃烧行为的热重分析  

THERMOGRAVIMETRIC ANALYSIS OF CO-COMBUSTION BEHAVIORS OF BIOMASS AND ANTHRACITE

作　　者：张建良[1] 李净[1] 胡正文[1] 殷上轶[2] 左海滨[1] 苏步新[1] 

机构地区：[1]北京科技大学冶金与生态工程学院钢铁冶金新技术国家重点实验室,北京100083 [2]东南大学能源与环境学院,南京210096

出　　处：《太阳能学报》2013年第10期1847-1852,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51104014)

摘　　要：将废弃木质生物质与无烟煤粉按9种比例混合,利用非等温热重分析法及改进的综合燃烧特性指数(Sc)计算式,对各试样的燃烧过程及动力学进行研究。结果表明,生物质与煤混燃过程包括析水、生物质挥发分燃烧、生物质固定碳燃烧和无烟煤固定碳燃烧4个阶段,生物质配比不同时混合样燃烧的最大速率控制阶段不同;随着生物质的增加,挥发分初析温度和燃尽温度逐渐降低,着火温度基本不变,Sc不断增大;生物质增加有利于混合样中生物质固定碳和无烟煤固定碳的燃烧,而不利于其中生物质挥发分的析出和燃烧。The thermal process and kinetics of waste woody biomass（B）, anthracite（C） and their 9 blends（B10-Bgo） in oxidizing atmosphere were investigated with a non-isothermal thermogravimetric method （TGA） and an improved formula of combustion characteristic factor（ Sc ）. The co-firing process involved mainly 4 stages, namely, the loss of moisture, the combustion of volatile matter from B, the combustion of fixed carbon from B and the combustion of fixed carbon from C. And the controlling stage of maximum burning rate for blends differed with different proportions of B. With the increase of B in blends, the initial volatilization temperature and burnout temperature gradually decreased, the ignition temperature appeared to be approximately invariable, and St increased progressively. The increase of B contributed to the combustion of fixed carbon from both B and C, but had an adverse effect on the decomposition and combustion of volatile matter from B.

关 键 词：生物质 无烟煤 混燃 热重分析 

分 类 号：TF526[冶金工程—钢铁冶金]