The individual phase holdups in three（liquid-gas-solid） phase fluidized bed and the bed of particles with floating contactors(cylindrical or spherical) for breaking bubbles have been measured over a wide range of liquid and gas velocities. Experiments were carried out in a 25.4 ㎝-diameter fluidized bed.
The effects of fluid velocity, particle size, shape of floating contactors and volume ratio of floating contactors to solid particles on bed porosity and phase holdups were determined.
Beds of particles and floating contactors having a volume ratio exceeding 10 % were found to have a significant bubble breaking potential. In contrast, beds of particles and floating contactors having the ratio below this value were found to have insignificant bubble breaking potential.
The data were correlated empirically by equations involving particle Reynolds and Froude numbers and surface ratio of floating contactors to particles.