Particle Residence Time and Pressure Drop in a Fluidized Bed with Internals

The effects of solid feeding rate,fluidizing gas velocity and space between baffles on the particle residence time and pressure drop of the titania slag particles ranging from 0.04 to 1.00 mm were investigated in a fluidized bed with internals and gas-solids countercurrent flow.The experimental results show that better fluidization state can form when the space between baffles equals the diameter of fluidized bed.The weight of particles in the fluidized bed depends on the fluidized gas velocity,and the average residence time decreases with increasing the fluidized gas velocity and the feeding rate.Average particle diameter in the bed at equilibrium state is greater than that of feeding particles,so the particle residence time decreases for the small particles and the particle residence time increases for the large particles.Fluidized bed reactor with internals can provide appropriate reaction time for different particle diameters.