화학공학소재연구정보센터
Canadian Journal of Chemical Engineering, Vol.79, No.2, 177-186, 2001
The effect of impeller pumping and fluid rheology on solids suspension in a stirred vessel
Pumping velocities of different impellers were measured using laser Doppler velocimetry. It was found that there is a link between impeller pumping capacity and the S parameter in the Zwietering correlation. Measurements showed that N-js increases with impeller spacing for dual impeller configurations. A dual-impeller configuration shows less sensitivity to solids loading change than a single-impeller configuration, and the change in N-js is larger for small impeller spacing than for large impeller spacing. An increase in slurry cloud height and a reduction in N-js resulted at a small increase of non-Newtonian viscosity.