Power Consumption and Gas-Liquid Mass Transfer Volumetric Coefficient in a Mechanically Agitated Vessel with Wire-Gauze Impeller.

Abstract

Power consumption and gas-liquid mass transfer volumetric coefficient in a mechanically agitated vessel with wire-gauze impeller were measured over a wide range of Reynolds number. The power consumption of the wire-gauze impeller did not decrease so much with aeration and was almost independent of the gas flow rate in the turbulent flow region, contrast to that of conventional impellers such as turbine and paddle. The agitation power correlation of the wire-gauze impeller was proposed in the operating condition of the gross circulation of the gas back into the impeller. The mass transfer volumetric coefficient was empirically correlated with both the physical properties of liquid and the agitation and aeration power input per unit liquid volume in the same manner as that by Nishikawa et al. (1981b), where it depended on the void fraction of the wire-gauze blade.