中国电机工程学报2013，Vol.33Issue(8)：44-49,前插7,7.
加压O2/CO2气氛下煤粉着火特性的实验研究
Experimental Research on Ignition Characteristics of Pulverized Coal Under Pressurized O2/CO2 Atmosphere
摘要
Abstract
The effects of pressure,oxygen concentration,char structure and coal types on the ignition characteristics of Datong bituminous coal and Shenhuo anthracite under pressurized O2/CO2 atmosphere were investigated,two combustion characteristic indexes were used to evaluate the coal ignition and combustion characteristics.The results of pressurized thermogravimetric experiments indicate that the ignition temperature decreases firstly and then increases with increasing pressure from 0.1 MPa to 2 MPa,and it is lowest at 1 MPa.Under atmospheric and pressurized conditions,the ignition temperature decreases with the increase of oxygen concentration.At atmospheric pressure,the decrease of the ignition temperature is slow with increasing oxygen concentration,while at elevated pressure,the decrease of the ignition temperature is significant at higher oxygen concentration along with the transformation of the ignition mechanism.The scanning electron microscopy (SEM) micrographs suggest that the elevated pressure enhances the coal fragmentation during devolatilization,thus more surfaces are available for reaction,the oxidation rate is improved,and the ignition temperature decreases.The decrease of the ignition temperature with the increase of volatile content indicates that coal types also affect the ignition of coal.The results show that the pressurized oxy-fuel combustion is superior to the atmospheric oxy-fuel combustion.关键词
煤粉/O2/CO2/着火温度/压力/氧浓度/煤焦结构Key words
pulverized coal/ O2/CO2/ ignition temperature/pressure/ oxygen concentration/ char structure分类
化学化工引用本文复制引用
应芝,张彦威,葛立超,周俊虎,周志军,刘建忠,岑可法..加压O2/CO2气氛下煤粉着火特性的实验研究[J].中国电机工程学报,2013,33(8):44-49,前插7,7.基金项目
国家重点基础研究发展计划项目(973计划)(2012CB214906) （973计划）
The National Basic Research Program (973 Program)(2012CB214906). （973 Program）
