A steady-state model is presented for predicting the flow behavior of a novel high-density circulating fluidized-bed coupled dual-loop system. The model allows the maximum achievable solids flux for given steady-state operating conditions to be predicted. The effects of superficial gas velocity, solids inventory, particle diameter and density, and the diameters of both risers and both downcomers as well as the position of the solids control valve are all predicted. Predictions are shown to be in good agreement with experimental values for solids circulation rates as high as 420 kg/m2 s for FCC particles in a dual-loop system. Parametric studies illustrate the usefulness of the approach for optimizing the operating conditions of complex gas-solid systems.
ASJC Scopus subject areas
- Chemistry (all)
- Chemical Engineering (all)
- Industrial and Manufacturing Engineering