热力发电2017，Vol.46Issue(4)：16-21,38,7.DOI:10.3969/j.issn.1002-3364.2017.04.016
O2/CO2气氛下煤/生物质混燃特性实验研究
Experimental study on co-firing characteristics of coal/biomass blends in O2/CO2 atmosphere
摘要
Abstract
Co-firing characteristics of different types of coal (bitumite,lean coal,anthracite) and biomass (rice husks) blends were studied using thermogravimetric analyzer.The influence of the combustion atmosphere (O2/CO2 O2/N2),bio-blending ratio and oxygen concentration on ignition temperature,burnout temperature,comprehensive combustion characteristics and kinetic property of the blends were investigated.The results show that,the mass loss rate trend of the blends in O2/N2 atmosphere was similar to that in O2/CO2 atmosphere,but in O2/CO2 atmosphere,the weight loss rate of the blends was faster,the activation energy of the fixed carbon was higher,and the comprehensive combustion characteristic index was lower.Co-firing with biomass could improve the combustion characteristics of pure coal.Compared with burning coal only,the ignition and burnout temperature of the coalbiomass blends decreased,indicating the combustion characteristics of the coal were enhanced.With the increasing bio-blending ratio,the co-combustion performance was improved further.By increasing the oxygen concentration,the co-combustion rate speeded up,the ignition and burnout temperature declined,and the comprehensive combustion characteristics became better.However,in the fixed carbon combustion stage,the activation energy and pre-exponential factor of the combustion reaction increased.Near the temperature corresponding to the maximum buming rate of fixed carbon,the activation energy of the co-combustion was lower than that of the only-coal combustion,and with the increasing proportion ofbiomass,the activation energy of the blended fuel reduced.关键词
煤/生物质/混燃/O2/CO2/热重分析/燃烧特性Key words
coal/biomass/co-firing/O2/CO2/thermogravimetric analysis/combustion characteristics分类
能源科技引用本文复制引用
王廷旭,匡思维,方庆艳,马仑,张成,陈刚..O2/CO2气氛下煤/生物质混燃特性实验研究[J].热力发电,2017,46(4):16-21,38,7.基金项目
国家自然科学基金项目(51676076)National Natural Science Foundation of China (51676076) （51676076）
