| From Single Droplet to Column Design |
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| 作者姓名： | Hans-Joerg Bart |
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| 作者单位： | Institute of Thermal Process Engineering,TU Kaiserslautern, D-67653 Kaiserslautern, Germany |
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| 基金项目： | Supported by the AiF （Arbeitsgemeinschaft Industrieller Forschungsvereinigungen, ＂0tto von Guerieke＂ e.V.）, the BMWA （Bundesministerium for Wirtschaft und Arbeit） and the DFG （Deutsche Forschungsgemeinsehaft ） |
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| 摘 要： | The technique state to design counter-current extraction columns is based on the performance of pilot plant experiments. The modelling is then either with the equilibrium or dispersion model, whereas in the latter the dispersion coefficient accounts for all hydrodynamic non-idealities. A new approach uses single droplet experiments to obtain the basic laws and functions governing droplet breakage, coalescence, relative velocity, and axial dispersion when using droplet populance balance models （DPBM）. The hydrodynamics simulation results show that the mean Sauter diameter, hold-up, and concentration profiles could be well predicted, which promotes the use of DPBM models for further applications in industrial scale.
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| 关 键 词： | 单一小滴 圆柱设计 逆流萃取 平衡模型 |
| 收稿时间： | 2005-10-09 |
| 修稿时间： | 2005-10-09 |
From Single Droplet to Column Design |
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| Hans-Joerg Bart.From Single Droplet to Column Design[J].Tsinghua Science and Technology,2006,11(2):212-216. |
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| Authors: | Hans-Jrg Bart |
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| Institution: | Hans-J(o)rg Bart |
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| Abstract: | The technique state to design counter-current extraction columns is based on the performance of pilot plant experiments. The modelling is then either with the equilibrium or dispersion model, whereas in the latter the dispersion coefficient accounts for all hydrodynamic non-idealities. A new approach uses single droplet experiments to obtain the basic laws and functions governing droplet breakage, coalescence, relative velocity, and axial dispersion when using droplet populance balance models (DPBM). The hydrodynamics simulation results show that the mean Sauter diameter, hold-up, and concentration profiles could be well predicted, which promotes the use of DPBM models for further applications in industrial scale. |
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| Keywords: | single droplet column design countercurrent extraction droplet populance balance model |
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