| 用颗粒流的动力学理论模拟提升管反应器流动特征 |
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| 引用本文： | 陈新国,徐春明,郭印诚. 用颗粒流的动力学理论模拟提升管反应器流动特征[J]. 化工学报, 2000, 51(2): 264-268 |
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| 作者姓名： | 陈新国 徐春明 郭印诚 |
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| 作者单位： | 石油大学重质油加工国家重点实验室!北京102200,石油大学重质油加工国家重点实验室!北京102200,清华大学工程力学系!北京100084 |
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| 摘 要： | 引 言大量实验结果[1～ 3]表明 ,循环流化床内气相和颗粒相的两相流体系中 ,颗粒浓度在提升管的横截面上存在显著的非均匀分布 .颗粒在某些条件下聚集于管壁 ,在某些条件下也可能聚集于管中央[4 ].颗粒浓度分布的非均匀性可以分为两种类型 ,一是颗粒层 (Ｐａｒｔｉｃｌｅ -Ｌａｙｅｒｉｎｇ) [5 ],其微观结构近似颗粒固定床 ,颗粒在沿平均速度方向上有排列成床的趋势 ,但仍保持流体特性 ;另为颗粒群(Ｐａｒｔｉｃｌｅ -Ｐａｃｋｅｔｓ) [6 ],颗粒群在流化床中的行为如同单相湍流中的流体涡团 ,作无规则运动 ,不断地形成、分解 .催化裂化提…
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| 关 键 词： | 提升管反应器 颗粒流 动力学 流体动力学 模拟 |
PREDICTION OF PARTICLE HYDRODYNAMICS IN RISER REACTOR BY USING KINETIC THEORY |
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| ChenXinguo,XuChunming,GuoYincheng. PREDICTION OF PARTICLE HYDRODYNAMICS IN RISER REACTOR BY USING KINETIC THEORY[J]. Journal of Chemical Industry and Engineering(China), 2000, 51(2): 264-268 |
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| Authors: | ChenXinguo XuChunming GuoYincheng |
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| Abstract: | By using the developed gas-particle two-phase flow-reaction model,the simulation of particle dynamicswas carried out in a commercial riser in FCC. The results show clearly that the catalysts backflow seriously in the nozzle zone by the influence of shoot and congregate in the pipe center. In the upper part of the riser reactor,catalysts flow in a fully developed steady current and the radial distribution of particle concentration gradually becomes what happens in vertical tubes,because the influence of shoot is more and more weakened. It is easy to find out that shoot influences the hydrodynamics of particle-phase intensively. |
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| Keywords: | riser reactor kinetic theory of granular flow hydrodynamics numerical simulation |
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