The characteristics of the power requirement of a moving bed with mechanical agitation have been investigated. The torque of agitation and pressure drop of the solid-gas moving bed were measured under various experimental conditions.
The amount of decrease in the torque by the flow-down of solid particles can be characterized by a dimensionless parameter defined by the ratio (F/ρα Vagl) of solid particles flow rate due to the gravity force, F and the convective flow rate by mechanical agitation, ρα Vagi, On the other hand, the amount of decrease in torque due to blowing air in the particles bed has been well interpreted in terms of a dimensionless pressure drop Δp/Δpmf, where Δpmf is the pressure drop at the minimum fluidization velocity, umf.
The general correlating equation for agitating torque has been provided. The power requirement for the moving bed with mechanical agitation has been well correlated by the various experimental parameters within an accuracy of ±30%.
