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燃烧科学与技术
第 3 卷(1997) 第 1 期 V o l. 3 (1997)N o. 1
JOURNAL BUSTION SCIENCE AND TECHNOLOGY
970010
流化床煤燃烧与气化过程中的辐射换热
许国良杨金国钱壬章
(华中理工大学)
Ξ摘要
流化床反应器中颗粒与颗粒之间的传热在一定程度上决定了化学反应的速率及反应的中间
历程。本文通过对气固流化床乳化相中颗粒群结构的进一步认识, 建立了颗粒间的辐射换热模型,
比较了不同颗粒直径、不同床层温度水平及不同流化工况下颗粒间辐射换热与通过气膜导热份额
的大小, 并预测了流化床反应器中反应颗粒与惰性床料之间的温差, 对于流化床反应器选择合理
的运行工况和进行操作参数优化具有参考价值。
关键词: 流化床, 辐射, 传热, 燃烧
Particle- to-Particle Rad iative Heat Tran sfer
in Gas-Solid Fluidized-Bed Reactors
Xu Guoliang Yang J inguo Qian Renzhang
(H uazhong U niversity of Science and T echno logy)
Abstract
Based on a further recognition of the construction of particle group s in em ulsion phase, a the
o retical model of radiative heat transfer of particle to particle in gas so lid fluidized beds is set up.
Comparisons of therm al radiation and heat conduction th rough gas m em brance betw een adjacent
particles are m ade w ith different particle sizes, average bed temperatures and fluidizing velocities.
T he temperature differences betw een active and inertia particles in fluidized bed reacto rs are p re
dicted by the model, w h ich is valuable to the op timization of perfo rm ing param eters.
Key words: F luidized bed, R adiation, H eat transfer, Com bustion
引言
对于流化床反应器, 特别是具有强热效应的热质传递过程, 如煤的燃烧与气化、颗粒物料
中国、武汉、邮编 430074。
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