SCALING UP OF SILVERSON ROTOR-STATOR MIXERS

被引：42

作者：

Hall, S. ^{[1
]}

Cooke, M. ^{[2
]}

Pacek, A. W. ^{[1
]}

Kowalski, A. J. ^{[3
]}

Rothman, D. ^{[4
]}

机构：

[1] Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England

[2] Univ Manchester, Sch Chem Engn & Analyt Sci, Manchester M60 1QD, Lancs, England

[3] Unilever R&D, Port Sunlight Lab, Wirral CH63 3JW, Merseyside, England

[4] Silverson Machines Ltd, Chesham HP5 1PQ, Bucks, England

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 2011年 / 89卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

high shear mixer; rotor-stator; scaling-up; emulsification; Weber number; DROP SIZE DISTRIBUTION;

D O I：

10.1002/cjce.20556

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In-line rotor-stator mixers are widely applied in industry for the formulation of emulsion products; however, the current understanding of break-age/coalescence in such devices is limited. In this study the effect of rotor speed, flow rate and dispersed phase viscosity on drop size distributions in an industrial and in a lab scale in-line Silverson rotor-stator mixer were investigated. Silicone oils with viscosities of 9.4 and 339 mPa s at 1 wt.% were emulsified in surfactant solution. Sauter mean diameters were correlated with various parameters and it has been found that Weber number is the most appropriate scaling parameter. Energy dissipation rate is a marginally poorer scaling parameter and this term requires prior knowledge of the experimentally determined power constants. Based on these observations it seems sensible to use Weber number as the preferred scaling-up parameter.

引用

页码：1040 / 1050

页数：11

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