循环流化床的沸腾传热

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循环流化床的沸腾传热

张利斌^a; 李修伦^b

^a Department of Chemical Engineering, Tsinghua University, Beijing 100084 China
^b School of Chemical Engineering, Tianjin University, Tianjin 300072, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-09-28 发布日期:2001-09-28
通讯作者: 张利斌

Boiling Heat Transfer in Circulating Fluidized Beds

ZHANG Libin^a; LI Xiulun^b

^a Department of Chemical Engineering, Tsinghua University, Beijing 100084 China
^b School of Chemical Engineering, Tianjin University, Tianjin 300072, China

Received:1900-01-01 Revised:1900-01-01 Online:2001-09-28 Published:2001-09-28
Contact: ZHANG Libin

摘要/Abstract

摘要： A model is proposed to predict boiling heat transfer coefficient in a three-phase
circulating fluidized bed (CFB), which is a new type of evaporation boiling means for
enhancing heat transfer and preventing fouling. To verify the model, experiments are
conducted in a stainless steel column with 39 mm ID and 2.0 m height, in which the heat
transfer coefficient is measured for different superficial velocities, steam pressures,
particle concentrations and materials of particle. As the steam pressure and particle
concentrations increase, the heat transfer coefficient in the bed increases. The heat
transfer coefficient increases with the liquid velocity but it exhibits a local minimum.The
heat transfer coefficient is correlated with cluster renewed model and two-mechanism
method. The prediction of the model is in good agreement with experimental data.

关键词: 循环流化床;沸腾传热;三相流;蒸汽压;传热系数

Abstract: A model is proposed to predict boiling heat transfer coefficient in a three-phase
circulating fluidized bed (CFB), which is a new type of evaporation boiling means for
enhancing heat transfer and preventing fouling. To verify the model, experiments are
conducted in a stainless steel column with 39 mm ID and 2.0 m height, in which the heat
transfer coefficient is measured for different superficial velocities, steam pressures,
particle concentrations and materials of particle. As the steam pressure and particle
concentrations increase, the heat transfer coefficient in the bed increases. The heat
transfer coefficient increases with the liquid velocity but it exhibits a local minimum.The
heat transfer coefficient is correlated with cluster renewed model and two-mechanism
method. The prediction of the model is in good agreement with experimental data.

Key words: boiling heat transfer, circulating fluidized bed, three-phase flow

张利斌, 李修伦. 循环流化床的沸腾传热[J]. CIESC Journal.

ZHANG Libin, LI Xiulun. Boiling Heat Transfer in Circulating Fluidized Beds[J]. .

参考文献

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循环流化床的沸腾传热

Boiling Heat Transfer in Circulating Fluidized Beds

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