Turbulent and fast fluidization (high velocity fluidization)

The results of experiments conducted at room conditions in a two dimensional and a round I.D. bed, on the transition from bubbling to turbulent fluidization of several solids of different sizes and densities is presented. The fast fluidization characteristics of a fine cracking catalyst in a round 3 inch I.D. bed is discussed. The character and range of turbulent and fast fluid beds (collectively called high velocity fluid beds) are explored. It was concluded that the transition from bubbling to turbulent fluidization is reflected in the fluctuations of both the dynamic pressure at any point in the bed and the pressure drop across the bed.