摘要
将贫煤与生物质及去碱金属生物质混合进行热重燃烧实验,研究了生物质中碱金属和富氧气氛对煤燃烧特性的影响。实验结果表明,富氧条件能够有效降低固定碳燃烧部分的着火温度和燃尽温度,30%氧浓度的O2/CO2气氛下煤的综合燃烧特性指数S与空气气氛相比从1.93%2/℃3·min2提高到3.05%2/℃3·min2,掺混生物质后燃烧性能进一步得到改善,综合燃烧特性指数提高到了5.57%2/℃3·min2;当贫煤中掺混去碱金属生物质后,综合燃烧特性指数介于原煤和掺混生物质煤之间;对煤掺混Na、K、Ca 3种生物质中常见碱金属的燃烧实验显示,Na、K、Ca均能一定程度地改善煤的燃烧性能。
Combustion characteristics of blends of meagre coal and cornstalk are investigated using thermo- gravimetric analysis under oxy-fuel atmosphere. The results show that the ignition and burnout ~emperatures of fixed carbon are reduced in oxy-fuel atmosphere. Compared with air atmosphere, the combustion characteristic index of coal （S） increases from 1.93%2/℃3· min2to 3.05%2/℃3· min2 at 30% oxygen concentration. And combustion characteristics are apparently improved and the combustion characteristic index increases to 5.57%2/℃3 · min2 when coal is mixed with biomass. However, the combustion characteristic index of coal mixed with acid-washing biomass blends is between pure coal and coal with biomass blends in different atmosphere. The combustion experiments of coal mixed with three alkali metals （Na,K,Ca）show that Na,K and Ca can improve the combustion characteristics of coal.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第7期53-58,共6页
Journal of Chongqing University
基金
重庆市科技攻关计划项目CSTC(2009AA7051)
关键词
富氧燃烧
贫煤
生物质
碱金属
热重分析
oxy-fuel combustion
meagre coal
biomass
alkali metal
thermo-gravimetric
