Experimental study on vibrating fluidization characteristics of wet particles

Experimental studies on vibrating fluidization characteristics of wet particles are carried out in a vibrating fluidized bed with a bed (140 mm×70 mm×600 mm). The effects of vibration intensity Γ(0 to 1.2), liquid content W(0 to 6.8%) and particle size dp(1.0 to 2.6 mm) on the fluidization characteristics were studied, including flow pattern, pressure drop and minimum fluidization velocity. The study results show that the vibrating fluidized bed of wet particles can improve the channeling of the wet particle fluidization and make the fluidizations more stable. During the deceleration process, the pressure drop of wet particles in the vibrating fluidized bed is observably lager than that of the ordinary fluidized bed at the fixed bed stage. However, at the second fluidization stage, pressure drops of the two fluidized beds were similar. Meanwhile, the pressure drop in the wet particle vibrating fluidized bed decreases firstly and then increases with the increase of the liquid content. In the wet particle vibrating fluidized bed, the minimum fluidization velocity decreases with the increase of the vibration intensity, increases firstly and then decreases with the increase of the liquid content, increases with the increase of the particle size. The calculation formula of the minimum fluidization velocity of Geldart-D wet particles in vibrating fluidized beds is obtained. © 2018, Editorial Department of Journal of Southeast University. All right reserved.