Gas discharge modes at a single horizontal nozzle in a two-dimensional fluidized bed

摘要

The gas discharge modes, bubbling and jetting, formed at a single horizontal nozzle in a two-dimensional gas fluidized bed were investigated by visual observation. The inside diameters of the nozzles used in this study were 3.0, 4.5, 6.0, 7.5 and 9.0 mm. The gas velocity through the mozzle was in the range from 1 to 130 m/s. The ratio of the superficial velocity to the minimum fluidizing velocity was in the range from 0 to 4. Gas discharge modes were analyzed by high speed cine photography, and the effects of the nozzle diameter, gas velocity through the nozzle, particle diameter and the static bed height were studied.