| STUDY ON THE OVERALL PRESSURE BALANCE OF A DOWNFLOW CIRCULATING FLUIDIZED BED SYSTEM |
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| 作者姓名： | Hengzhi Chen Dawei Yang Hongzhong Li Shiyu Tan |
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| 作者单位： | [1]College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, R R. China [2]Multiphase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Science, Beijing 100080, P.R. China |
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| 摘 要： |
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| 关 键 词： | 循环流态床 运算稳定性 全压力平衡 化学动力学 |
| 收稿时间： | 2006-01-10 |
| 修稿时间： | 2006-01-102006-04-02 |
STUDY ON THE OVERALL PRESSURE BALANCE OF A DOWNFLOW CIRCULATING FLUIDIZED BED SYSTEM |
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| Hengzhi Chen Dawei Yang Hongzhong Li Shiyu Tan.STUDY ON THE OVERALL PRESSURE BALANCE OF A DOWNFLOW CIRCULATING FLUIDIZED BED SYSTEM[J].China Particuology,2006,4(3):153-159. |
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| Authors: | Hengzhi Chen Dawei Yang Hongzhong Li Shiyu Tan |
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| Abstract: | A pressure balance model for a circulating fluidized bed unit that incorporates a downer has been proposed. The model predictions were validated with the experimental data obtained from a special cold-model circulating fluidized bed. Comparison of the operation stability between a CFB downer and a CFB riser has been carried out. Only one critical gas velocity exists in the CFB-riser for a given riser solids flux, while there can be many critical gas velocities for the operation of a CFB downer. Therefore, it is possible to achieve high solids concentration in a CFB downer if appropriate operating conditions are used. |
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| Keywords: | circulating fluidized bed operation stability downer riser |
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