Distributors are used in fluidized beds as support for the static bed and to ensure a uniform distribution of gas within the bed. They should avoid segregation and deposition of large or dense particles. In applications involving the processing of solids, they are responsible for the rapid dispersion of the solid fed. In applications where high conversions of reactant gases are required, the distributors must produce a uniform distribution of gas and with small bubbles.
The distributors should be strong enough to resist deformation under the conditions under which they are submitted and must operate for long periods without obstruction, they should have easy clearance, and they should prevent erosion and friction of the particles, and operate with a low head pressure, to minimize power consumption (Kunii and Levenspiel, 1991).