气固循环流化床提升管环核区颗粒质量传递系数的估计

CIESC Journal

• TRANSPORT PHENOMENA & FLUID MECHANICS • 下一篇

气固循环流化床提升管环核区颗粒质量传递系数的估计

刘新华^a,b;高士秋^a;宋文立^a

^a Multiphase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China
^b Graduate School of the Chinese Academy of Sciences, Beijing 100864, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-10-28 发布日期:2005-10-28
通讯作者: 刘新华

Prediction of Core-Annulus Solids Mass Transfer Coefficient in Gas-Solid Fluidized Bed Risers

LIU Xinhua^a,b; GAO Shiqiu^a; SONG Wenli^a

^a Multiphase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China
^b Graduate School of the Chinese Academy of Sciences, Beijing 100864, China

Received:1900-01-01 Revised:1900-01-01 Online:2005-10-28 Published:2005-10-28
Contact: LIU Xinhua

摘要/Abstract

摘要： Based on analysis of energy dissipation in the core region of gas-solid fluidized bed risers, a simplified model for determination of core-annulus solids mass transfer coefficient was developed according to turbulent diffusion mechanism of particles. The simulation results are consistent with published experimental data. Core-annulus solids mass transfer coefficient decreases with increasing particle size, particle density and solids circulation rate, but generally increases with increasing superficial gas velocity and riser diameter. In the upper dilute region of gas-solid fluidized bed risers, core-annulus solids mass transfer coefficient was found to change little with the axial coordinate in the bed.

关键词: 气固循环流化床;提升管;环核区;传质;颗粒质量;传递系数;估计;湍流

Abstract: Based on analysis of energy dissipation in the core region of gas-solid fluidized bed risers, a simplified model for determination of core-annulus solids mass transfer coefficient was developed according to turbulent diffusion mechanism of particles. The simulation results are consistent with published experimental data. Core-annulus solids mass transfer coefficient decreases with increasing particle size, particle density and solids circulation rate, but generally increases with increasing superficial gas velocity and riser diameter. In the upper dilute region of gas-solid fluidized bed risers, core-annulus solids mass transfer coefficient was found to change little with the axial coordinate in the bed.

Key words: solids mass transfer coefficient, core-annulus structure, turbulent diffusion, gas-solid fluidization

刘新华,高士秋,宋文立. 气固循环流化床提升管环核区颗粒质量传递系数的估计[J]. CIESC Journal.

LIU Xinhua, GAO Shiqiu, SONG Wenli. Prediction of Core-Annulus Solids Mass Transfer Coefficient in Gas-Solid Fluidized Bed Risers[J]. .

气固循环流化床提升管环核区颗粒质量传递系数的估计

Prediction of Core-Annulus Solids Mass Transfer Coefficient in Gas-Solid Fluidized Bed Risers

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