Gassed Power Consumption and Gas Hold-up for a Dual Hollow Blade Impeller System in a Stirred Vessel

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  • Otomo Noboru
    School of Engineering, Department of Chemical Engineering, The University of Birmingham
  • Bujalski Waldermar
    School of Engineering, Department of Chemical Engineering, The University of Birmingham
  • Nienow Alvin William
    School of Engineering, Department of Chemical Engineering, The University of Birmingham
  • Takahashi Koji
    Department of Chemistry and Chemical Engineering, Yamagata University

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Gas dispersion characteristics, i.e. ungassed and gassed power consumption, flow patterns and gas hold-up of the dual hollow blade disk turbines (6HB), which had been recently developed by a manufacturer to obtain a better gas dispersion performance than the traditional 6-bladed Rushton disc turbine (6DT), were investigated experimentally. The effect of impeller spacing in the dual 6HB impeller system on the unaerated and aerated power consumption was examined thoroughly.<BR>The gassed power consumption and gas hold up for the dual 6HB were compared with those obtained for the dual 6DT (radial flow impellers) and the dual Lightnin A315 (axial flow characteristics), of which performance has been also advanced recently. An enhancement of the gas handling capacity of the 6HB was achieved.

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