HYDRODYNAMICS OF A GAS-LIQUID REACTOR STIRRED WITH A MULTI-IMPELLER SYSTEM

The behaviour of a sparged vessel agitated by two impellers is examined. Three stirrer configurations were tested: double Rushton turbine, Rushton turbine plus a pumping downward mixed flow turbine and a Rushton turbine plus a pumping upward mixed flow turbine. Hydrodynamic regimes, dissipated power and mixing time of the liquid were considered, several regimes were identified both for the bottom impeller and for the upper one