Research on the coarse particles velocity characteristic in fluidized bed

In order to understand the particle velocity distribution characteristics of the 2D bubbling fluidized bed. The paper study that several mainly factors (static bed height, particle size and gas speed) influence on velocity distribution of the outer particles by experiment. The results for particles around bubble show that: (1)Under the condition of the same static bed height and particle size, the particle velocity increases with the gas speed; the particle velocity increase at the axial direction and has no rule at radial direction. (2)On the basis of the same wind speed and particle size, the particle velocity reduce with the static bed height; the particle velocity decreases at the axial direction and has no regular at radial direction. (3)At the same wind speed and static bed height, the particle velocity is gradual reducing with the particle size; the particle velocity also reduce at the axial direction and has no rule at radial direction.