| 移动床径向反应器中气体离心流动对颗粒移动状况的影响 |
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| 引用本文： | 宋续祺,龚美珊.移动床径向反应器中气体离心流动对颗粒移动状况的影响[J].化工学报,1993,44(4):433-441. |
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| 作者姓名： | 宋续祺 龚美珊 |
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| 作者单位： | 清华大学化工系,清华大学化工系,清华大学化工系,中国石油化工总公司北京设计院 北京100084
,北京100084
,北京100084
,北京100029 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 对于催化剂不断失活但可再生的工业过程,广泛采用移动床径向反应器在较低的系统压降下进行连续操作.此时存在由贴壁和空腔现象所决定的径向气体流量的上限值.本文分析了有径向离心气体流动时颗粒层中的应力分布,应用散料力学理论建立了计算床中初始形成空腔时无因次床层总压降的理论模型,模型预测值与实验值符合很好.同时测定了不同条件下空腔界面的形状.
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| 关 键 词： | 移动床 径向反应器 散料力学 贴壁 |
THE FORMATION OF CAVITY IN MOVING BED RADIAL FLOW REACTOR |
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| Song Xuqi,Jin Yong and Yu Zhiqing.THE FORMATION OF CAVITY IN MOVING BED RADIAL FLOW REACTOR[J].Journal of Chemical Industry and Engineering(China),1993,44(4):433-441. |
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| Authors: | Song Xuqi Jin Yong and Yu Zhiqing |
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| Abstract: | For certain types of chemical reactor whose catalyst decays rapidly but reversibly, continuous operation is possible by the use of a moving bed radial flow reactor. There is an upper limit on the flowrate of gas imposed by the mechanical phenomenon of "pinning" and the formation of cavity. The dimensionless pressure drop for cavity initiation can be predicted by using the theories of particulate media mechanics, with the gas stream flowing outward radially. The theoretical results agree very well with the experimental data. |
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| Keywords: | moving bed radial flow reactor particulate media mechanics phenomenon of pinning |
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