CIESC Journal

• 化工学报 • 上一篇    下一篇

膜乳化过程中流体流动对液滴受力和乳化效果的影响

王志,王世昌,SchroederV.,SchubertH.   

  1. 天津大学化学工程研究所!天津300072,天津大学化学工程研究所!天津300072,InstituteofFoodProcessEngineering,KarlsruheUniversity!D-76l28Karlsruhe,Cermany,InstituteofFoodProcessEngineering,KarlsruheUniversity!D-76l28Karlsruhe,Cermany
  • 出版日期:1999-08-25 发布日期:1999-08-25

INFLUENCE OF FLUID FLOW ON FORCES ACTING ON DROPLET AND EMULSIFICATION RESULTS IN MEMBRANE EMULSIFICATION PROCESS

Wang Zhi and Wang Shichang ( Chemical Engineering Research Center, Tianjin University, Tianjin 300072) Schroeder V. and Schubert H.(Institute of Food Process Engineering,Karlsruhe University, D-76128 Karlsruhe, Germany)   

  • Online:1999-08-25 Published:1999-08-25

摘要: 分析了膜乳化过程中流体流动状况和分散相液滴的受力情况,以及二者的密切关系.在一定条件下计算了液滴所受的力,结果表明,表面张力引起的力、液滴内外静压差产生的力、平行于膜表面的流动曳力和运动浮力是主要的力;在此基础上,探讨了液滴的形成过程.实验考察了壁面剪应力和膜两侧压差与液滴平均直径及分散相通量的关系,结合受力计算讨论了分散相和连续相流动状况对膜乳化效果的影响.

Abstract: The flow regime of continuous phase and disperse phase and the forces acting on droplets of disperse phase in membrane emulsification were analyzed. It showed that the flow regime and the forces were closely related to each other. Calculation indicated that the interfacial tension force, static pressure force, viscous drag force and dynamic lift force were the main forces acting on the droplets. The formation process of the droplet was studied . The effects of wall shear stress and trans-membrane pressure on disperse phase permeation flux and mean droplet diameter were investigated by experiments. On the basis of calculation and experiments , the influence of fluid flow on membrane emulsification results was discussed.

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