EXPERIMENTAL INVESTIGATION OF SOLIDS FLOW FROM AERATED BEDS THROUGH INCLINED PIPES

Solid flow from an aerated bed through an inclined pipe where the aeration velocities vary between zero and minimum fluidization velocities is studied for two cases. In the first case, the pipe outlet is open to the atmosphere, and in the second case, it is open to a pressure impeded vessel. The experimental results are correlated by equations which include the effect of length, shape of the entry, inclination of the pipe to the horizontal, in addition to the effect of diameters of the particles and pipe, density of the particles, bed height, etc. It is found that for the second case the gas flow through pipe also plays an important role. It is shown that the correlations developed for aerated beds may be used without modification for predicting solids flow from fixed and fluidized beds through inclined pipes, and inclined as well as horizontal orifices with reasonable accuracy.