油页岩及半焦流化燃烧热破碎特性  

Thermal Fragmentation Characteristic of Oil Shale and Semi-coke in Fluidized Bed Combustion

作　　者：孙佰仲[1] 王擎[1] 谭平[1] 刘洪鹏[1] 李少华[1] 关晓辉[1] 

机构地区：[1]东北电力大学吉林省油页岩综合利用科技创新中心,吉林省吉林市132012

出　　处：《中国电机工程学报》2010年第23期62-66,共5页Proceedings of the CSEE

基　　金：吉林省重点科技攻关项目(20080413);东北电力大学博士基金项目(BSJJXM200901)~~

摘　　要：在小型流化床燃烧试验台上对桦甸油页岩及其干馏半焦、霍林河褐煤燃烧过程破碎特性进行试验研究,考察燃料粒径、床温、燃烧时间、流化风速对样品热破碎程度的影响。结果表明:油页岩及半焦的破碎主要在颗粒表面上进行,破碎后主要为细颗粒碎片,半焦的破碎程度比油页岩剧烈;燃料粒径增大、床温升高,停留时间延长均会加大样品破碎程度;干馏终温对半焦破碎特性有重要影响,随着干馏终温增大,半焦破碎严重。灰色关联分析表明:干馏终温为400、500℃的半焦和原油页岩热破碎影响因素排序为床温最大,粒径次之,燃烧时间最小;而600℃半焦略有不同,流化风速影响程度大于粒径的影响。Thermal fragmentation characteristic of oil shale and semi-coke was preliminarily determined in a bench-scale CFB reactor with comparison to Houlinhe lignite. The influent factors on fragmentation index of solid fossil fuel were studied such as particle size, bed temperature,burning time and fluidizing gas velocity. The result indicates that fragmentation index increases with increasing of particle size, bed temperature, residence time and fluidizing velocity irrespectively. Under the same condition the fragmentation index of semi-cokes is higher than that of oil shale. Different restoring temperatures of oil shale affect on the fragmentation degree. Higher retorting temperature of semicoke results higher fragmentation. By contract, the fragmentation index of Houlinhe lignite is the highest in all samples. The extent of influence of operational parameters on fragmentation was studied with gray relational analysis method. It is indicates that oil shale, semi-coke of retorting temperature 400 and 500 ℃ had the same sequence of influence as follow： bed temperature has the greatest influence,the particle size take second place, the combustion time is the least. The semi-coke of retorting temperature 600 ℃ has slightly difference： The influence of fluidizing velocity is higher than that of particle size.

关 键 词：流化床 热破碎 油页岩 半焦 灰色关联分析 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]