Abstract
The relationship between the flowrate of solid particles issuing from a throat, which was installed at the lower end of standpipe, and the flowrate of a gas through an inlet located just above the throat has been studied experimentally, with the object of establishing a method of controlling the particle flowrate in a solid recirculation loop.
It was found that when the pressure drop across the throat was positive in the direction of solid flow, the flowrate of solid particles increased linearly with the flowrate of the added gas flowing through the throat. An experimental equation that correlates flowrate of solid particles with gas flowrate through the throat, throat diameter and the mean diameter and bulk density of the solid particles was obtained.
It was also found that the pressure drop across the throat was satisfactorily expressed by a theoretical equation derived from Ergun's equation.
