Influence of liquid properties and operating variables on enrichment ratio in nonfoaming and foaming adsorptive bubble separation techniques

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:238

Article

Suzuki, A ; Maruyama, H

关键词: nonfoaming adsorptive bubble separation;    foam separation;    dimensionless correlation;    enrichment ratio;    ohnesorge number;   

DOI  :  10.1006/jcis.2001.7492

来源: Elsevier

【 摘 要 】

The influence of the liquid properties and the operating variables on the intrinsic volumetric flow rate, q(0), of the droplets at the liquid-atmosphere interface in nonfoaming adsorptive bubble separation and that, W-m, of the liquid in foam at the liquid-foam interface in foam separation was studied to estimate the enrichment ratio of surface-active substance in the two techniques. Each intrinsic flow rate was determined by the extrapolation method, which the authors proposed previously, and was mainly influenced by superficial gas velocity, liquid viscosity, and surface tension. Although the changes in the surface tension and the liquid viscosity were small, they greatly affected the intrinsic how rates for both the droplets and the liquid in foam. The experimental results were applied to a dimensional analysis. Dimensionless volumetric how rates, q(0)/Q and W-f0/Q, were successfully correlated with a dimensionless number (Ohnesorge number, Z = mu (L)/(rho (L)sigmad(b))(0.5)).q(0)/Q = 6.66 Z(1.46) and W-f0/Q = 2.53Z (0.533) were obtained for the nonfoaming and the foaming regions within errors of 30 and 35%, respectively. The enrichment ratio of surface-active substance in the droplets and the liquid in foam to the bulk liquid was derived by using these correlations for the nonfoaming and the foaming regions, respectively A good agreement of the experimental enrichment ratio and the calculated ones was obtained by using the correlations for nonfoaming and foaming. (C) 2001 Academic Press.

【 授权许可】

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