SCALE-UP OF AGITATION FLUIDIZED-BED GRANULATION .4. SCALE-UP THEORY-BASED ON THE KINETIC-ENERGY SIMILARITY

The scale-up theory based on kinetic energy similarity was proposed to elucidate the scale-up characteristics in agitation fluidized bed gra nulation, In this model, kinetic energy given to granules by agitator rotation and fluidizing air were taken into consideration, It was foun d that granule mass median diameter, apparent density and shape factor can be well expressed by the parameter (R omega/u)(2), which showed t he ratio of kinetic energy by agitator rotation to that by fluidizing air, Based on the results obtained, effects of operational variables a nd scale factor on the granule properties could be explained theoretic ally and granule growth mechanism in agitation fluidized bed granulati on was elucidated in detail.