MASS FLUX PROFILES IN A HIGH-DENSITY CIRCULATING FLUIDIZED-BED

Results of experimental measurements of solids mass flux profiles in a circulating fluidized bed riser over a wide range of operating condit ion are described. Three types of radial solids flux profiles are foun d to exist: parabolic/core-annular, radially uniform, and U-shaped. A model for these three regimes is proposed and correlations of two mode l parameters are obtained. A comparison of predicted solids flux profi les with experimental data is very promising. The correlations for the boundaries of the three regimes and the core radius for the core-annu lar regime are obtained.