PARTICLE CROSS-FLOW, LATERAL MOMENTUM FLUX AND LATERAL VELOCITY IN A CIRCULATING FLUIDIZED-BED

Lateral and axial profiles of solids cross-flow nux were measured in a circulating fluidized bed riser of square cross-section with a sampli ng probe. The solids cross-now flux was found to be higher near the wa ll, especially near the corners, and lower in the core of the riser. T he net solids horizontal flux was outwards in the lower part of the ri ser and inwards near the top. The lateral solids momentum flux, measur ed by means of a piezoelectric probe, increased with height and then d ecreased near the top of the riser. The lateral solids momentum flux f irst increased with distance from the axis and then decreased towards the wall. It was especially low near the corners.