| Efficiency of Plate Separators for Dispersed Liquid-Liquid Systems |
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| 作者姓名： | 唐洪涛 吴剑华 |
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| 作者单位： | School of Mechanical Engineering Tianjin University，Shenyang Institute of Chemical Technology，Tianjin 300072 China Shenyang 110142 China |
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| 摘 要： | Plate packages are effective and promising appa-ratus for the separation of droplets from non-homoge-neous mixed systems of liquid-liquid dispersion inchemical unit operation for their features of compactconfiguration, low equipment cost and high efficien-cy1]. The theories of plate separators were proposedand a lot of experimental researches were carried outin 1960s. Walteret alproved that in contrast to tradi-tional gravity settlers, plate packages are successfullyused to improve the separa…
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| 关 键 词： | 效率 聚结 分离器 两相流 液-液系统 |
| 收稿时间： | 2006-04-12 |
Efficiency of Plate Separators for Dispersed Liquid-Liquid Systems |
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| TANG Hongtao,WU Jianhua.Efficiency of Plate Separators for Dispersed Liquid-Liquid Systems[J].Transactions of Tianjin University,2006,12(5):313-318. |
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| Authors: | TANG Hongtao WU Jianhua |
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| Abstract: | The basic flow model of laminar flow field and the trajectory model of dispersed phase drops are derived. Based on the comparable volumetric flow rate, the dispersed flow rate can be linearly discretized. Consequently, the trajectory of a droplet in the channel can be tracked, and the trajectories of all drops are observed in order to statistically analyse the drops for capture or entrainment. Therefore,in terms of theoretical model of motion,the stratified two phase flow systems are studied in the mixture of nitrobenzene and concentrated sulfuric acid. The analytical results indicate that the trajectories of droplets of different diameters are different at the same location. The larger droplets can help to promote the efficiency of plate separators. The thickness of trickling film has a significant influence on the efficiency of numerical simulation when the concentration of the dispersed phase is greater than 10~0/_0. So the modification of thickness of trickling film can help to get the real flow field efficiency. The low flow rate lowers the average Renolds number so that the lighter phase droplets have sufficient time to interact with the trickling film. It is an indispensable factor for predicting efficiency that coalesced drops flow off inclined plates together with trickling films. A comparison confirms that the simulation results are in good agreement with the experiment results. |
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| Keywords: | efficiency coalescence separators drops two phase flow |
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