Numerical Simulation of Influence of Distributor Structure on Gas Distribution in Gas-Solid Bubbling Fluidized Bed

Based on two-fluid model,fix the perforated rate Φ=3.86%,numerical simulation of the distribution of gas in six different kinds of holes arranged fluidized beds is carried out by CFD software Fluent 6.3.Law of gas distribution under different kind of holes arranged condition is obtained.The result shows that numerous bubbles are produced in fluidized bed of distibuting holes uniformly,and the bubbles distribute unevenly.There are large dense areas of low fluid.In each fluidized bed of distributing holes nonuniformly,E fluidized bed(fluidized bed of big holes and small ones cross arranged in the distributor) has smaller size of bubbles,better dispersity and more homogeneous velocity vector of gas.Compared with fluidized bed of distributing holes uniformly,E fluidized bed has smaller fluctuation of axial pressure,more gentle of radial pressure.So,it has the most reference value for optimizing design of bubbling fluidized bed.