Effect of impeller vertical position on drop sizes in agitated dispersions

Citation
D. Daglas et M. Stamatoudis, Effect of impeller vertical position on drop sizes in agitated dispersions, CHEM ENG TE, 23(5), 2000, pp. 437-440
Citations number
16
Categorie Soggetti
Chemical Engineering
Journal title
CHEMICAL ENGINEERING & TECHNOLOGY
ISSN journal
09307516 → ACNP
Volume
23
Issue
5
Year of publication
2000
Pages
437 - 440
Database
ISI
SICI code
0930-7516(200005)23:5<437:EOIVPO>2.0.ZU;2-P
Abstract
The effect of impeller height relative to the vessel bottom was studied by measuring the drop size distributions of kerosene dispersions in water at t wo positions inside a stirred tank. Measurements were taken at 1/3, 1/2, an d 2/3 of total vessel height for rotational speeds 250, 300, 350 and 400 RP M and for hold-up fractions 0.02 and 0.04. Results show an influence of imp eller height on drop sizes ranging from a Sauter mean diameter decrease of 7.8 % to an increase of 35 % relative to the ones obtained with the impelle r at the center of the vessel.