论文信息 - Bubble size estimation in a bubble swarm

Bubble size estimation in a bubble swarm

Abstract The hindered settling equations of J. H. Masliyah (Chem. Eng. Sci.34, 1166 (1979)) have been adapted to predict mean bubble size in bubble swarms. The measurements required are superficial liquid and gas rates, and gas holdup. Predicted and measured (by photography) bubble sizes agree within 15% over the tested range 0.5–1.5 mm. The upper bound of applicability is a bubble Reynolds number of approximately 500, or bubble size of approximately 2 mm, making it well suited to flotation studies. The same equations are used to explore theoretically the effect of solids on bubble rise velocity and gas holdup.

[1] V. I. Tyurnikova,et al. Improving the effectiveness of flotation , 1981 .

[2] R. Roscoe. The viscosity of suspensions of rigid spheres , 1952 .

[3] A. K. Jain,et al. A correlation for gas holdup in turbulent coalescing bubble columns , 1986 .

[4] J. A. Finch,et al. Column Flotation: Some Plant Experience and Model Development , 1985 .

[5] James A. Finch,et al. Estimation of Bubble Diameter in Flotation Columns from Drift Flux Analysis , 1988 .

[6] J. F. Harper,et al. The Motion of Bubbles and Drops Through Liquids , 1972 .

[7] H. Sasaki,et al. A new method for measuring the size distribution of gas bubbles in aqueous media , 1986 .

[8] V. I Klassen,et al. An introduction to the theory of flotation , 1963 .

[9] Yatish T. Shah,et al. Design parameters estimations for bubble column reactors , 1982 .

[10] Jacob H. Masliyah,et al. ]Hindered settling in a multi-species particle system , 1979 .

[11] A. Schumpe,et al. Gas-liquid interfacial areas in a bubble column with suspended solids , 1984 .

[12] James A. Finch,et al. Estimation of local holdup in the bubbling and froth zones of a gas—liquid column , 1985 .