FINE PARTICLE FLUIDIZATION - EFFECTS OF MECHANICAL/ACOUSTIC VIBRATIONS

摘要

A comprehensive study on the fluidization of fine particles in a vibro-fluidized bed and a sound-vibrated fluidized bed was carried out with a variety of fine particulate materials including TiO_2, CaCO_3 and glass beads, 0.7-65 μm in average size. Effects of vibrations on fine particle fluidization were extensively tested with respect to bed pressure drop, average bed voidage, agglomeration of the fine particles, and tensile strength of the bed materials. Vibration led to an improvement on the fluidization quality for all the particles examined, significantly reducing both the agglomerate size and the segregation of agglomerates in the bed, and dramatically lowering the tensile strength of the particle bed.