Abstract:
In a gas selfinducing contactor, the induced gas bubbles are concentrated in the upper region. In view of this limitation, four different impeller combinations were tested. The effects of bottom impeller diameter, impeller spacing and draft tube were studied. Gas holdup and its dispersion were measured. It is found that the bottom impleller not only distributes the gas bubbles but also affects the rate of gasinduction considerably, which is agreed well with the results of the theoretical derivation. In accordance with the hydrohynamic principles, the best configuration is recommended which has been applied successfully in the industrial plants.