Estimation of power consumption in gas-liquid stirred vessels with various types of impellers

Abstract

Satoh’s equation (Satoh et al., 1991) was modified to estimate the power consumption in gas–liquid stirred vessels with various types of impellers. Npand f was added in order to use a correlation equation widely (f: correction factor for special shaped impeller and large scale impellers, Np: power number without aeration). Power consumption was correlated by the following equation. (Formula present) The value of β was about 1.2 to 1.3 for general impellers (disk turbine, pitched disk turbine, flat paddle and pitched paddle) and about 1.2 for large scale impellers (MAXBLEND™ and FULLZONE™). By using this equation, the power consumption of general impellers and large scale impellers can be presumed with sufficient accuracy.