EXAMPLE: Blending efficiency of impellers Select type of high-speed impeller with minimum energetic.
EXAMPLE: Blending efficiency of impellers Select type of high-speed impeller with minimum energetic requirements for continual blending (homogenization) of two miscible liquids A + B (u – 5 mPa-s, p 1100 kg-m3) with flow rate of mixture 101 s-1. For suitable degree of homogenization must be residence time of liquids in equipment 5 x longer than blending time. Mixing equipment has standard geometrical configuration (baffled cylindrical vessel with diameter T = 1200 mm, T/d- 3.3; H2/d = 1) Dimensionless blending time of high-speed impellers in turbulent flow regime Type of impeller T/d H2/d n-tm Six-blade turbine with disk (Rushton turbine), CVS 69 1021 3.3 1 51.8 Pitched six-blade turbine with pitch angle 45, CVS 69 1020 3.3 1 53.1 Pitched three-blade turbine with pitch angle 45°, CVS 69 1025.3 3.3 1 60.5 Mar 31 2022 10:34 AM
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