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	卧式循环流化床锅炉压降和颗粒体积分数分布
	向杰 ; 李清海 ; 张衍国 ; 蒙爱红 ; XIANG Jie ; LI Qinghai ; ZHANG Yanguo ; MENG Aihong
	2016-03-30 ; 2016-03-30
关键词	卧式循环流化床 漩涡分离器 压降分布 颗粒体积分数 horizontal circulating fluidized bed cyclone separator pressure drop distribution particle concentration TK229.66
其他题名	Distribution of Pressure Drop and Particle Concentration in a Horizontal Circulating Fluidized Bed Boiler
中文摘要	为了研究卧式循环流化床(Horizontal Circulating Fluidized Bed,HCFB)内的气固流动特性,在带漩涡分离器的HCFB冷态试验台上,以颗粒粒径为87μm、170μm和211μm的玻璃珠为试验物料,采用压差传感器和光纤测量仪研究了颗粒粒径和表观气速对床内压降和颗粒体积分数分布的影响.结果表明:炉膛压降主要发生在主燃室,占总压降的90%左右,副燃室和燃尽室的压降很小;主燃室沿程压降和轴向颗粒体积分数均呈指数分布,横向颗粒体积分数呈"环-核"分布;副燃室的颗粒体积分数呈严重偏向的左稀右浓分布,而燃尽室的颗粒体积分数始终很低;随着颗粒粒径的增大,表观气速需分别至少达到1.25m/s、1.50m/s和2.00m/s时才能获得循环流态化状态.; To study the gas-solid flow characteristics in a horizontal circulating fluidized bed(HCFB),the effects of bed material diameter and superficial gas velocity on the profile of pressure drop and particle concentration were analyzed by taking three glass beads(dp=87μm,170μm,and 211μm)as the test material on a HFCB cold-state test setup with cyclone separator using differential pressure sensors and a fiber optic probe.Results indicate that the pressure drop mainly occurs in the primary chamber,accounting for approximately 90% of the total pressure drop.However,the pressure changes little in the secondary and burnout chamber.In the primary chamber,the axial profiles of both pressure drop and particle concentration are characterized by an exponential curve and the lateral particle concentration distributes in an annulus-core structure.The particle concentration is severely asymmetrical in the secondary chamber,dilute at the left and dense at the right,which always remains low in the burnout chamber.The superficial gas velocity has to reach at least 1.25m/s,1.50m/s,and 2.00m/s respectively for the three glass beads to obtain a state of circulating fluidization.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144900]
专题	清华大学
推荐引用方式 GB/T 7714	向杰,李清海,张衍国,等. 卧式循环流化床锅炉压降和颗粒体积分数分布[J],2016, 2016.
APA	向杰.,李清海.,张衍国.,蒙爱红.,XIANG Jie.,...&MENG Aihong.(2016).卧式循环流化床锅炉压降和颗粒体积分数分布..
MLA	向杰,et al."卧式循环流化床锅炉压降和颗粒体积分数分布".(2016).

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