Effects of acoustic vibration on nano and sub-micron powders fluidization

摘要: Fluidization of nano and sub-micron powders with without acoustic vibration was investigated. The effects sound pressure level frequency were studied. Loudspeakers located under the distributor plate used as source to disintegrate larger agglomerates concentrated at bottom bed. Nanoparticles showed fluid-like behavior similar Geldart's A group application improved their fluidization quality. Submicron particles hard fluidize quality partially by excitation. Bed compaction, caused rearranging agglomerates, observed for submicron low gas velocities while bed fixed. did not experience any compaction. Sound led a decrease in minimum velocity an increase drop expansion both types particles. increased frequencies, reverse higher frequencies. these increasing level. There critical 110 dB, below which effect insignificant. novel technique employed find apparent from signals.