Experimental research of bed pressure drop in large particles vibrated fluidized bed with internal horizontal tubes

The vibrated fluidized bed with internal horizontal tubes was established,and the bed pressure drop in large particles vibrated fluidized bed with internal heating tubes was studied experimentally with large ammonium diacid phosphate particles as experimental material.The results showed that implication of vibrations is visible to decrease the critical pressure drop of the bed.Under same bed conditions,the larger the vibration frequency is,the lower the critical pressure drop will be;the effect of vibration amplitude on critical pressure drop is little.At low gas velocity,the vibration could reduce the bed porosity,and then induce higher pressure drop in vibrated fluidized bed than common fluidized bed.In the vibrated fluidized bed with internal horizontal tubes,the vibrations have more effects on small particles than large particles.An empirical formula was derived from the experiments,and showed good agreement with the experiment data.