Authors: Yongmin Zhang a, Yongshi Liang a, Meng Wang a, and Xiaotao Bi b
a State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, P. R. China
b Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, Canada V6T 1Z3
Source: This paper was published in the 13th International Conference on Fluidized Bed Technology in 2021.
Abstract: The effect of macro solids flux on the hydrodynamics of bubbling fluidized beds of Group A particles was studied experimentally. Both radial and circumferential homogeneities were found to be improved in our beds of FCC particles, which is in contrast to the finding in Issangya et al. (2010) who found that increasing the solids flux worsens fluidization quality in their deep fluidized beds of similar FCC particles. Later, our CPFD simulations proved the validation of both findings and found the root cause of these two contradict findings is due to the different geometric configurations of the solids inlets in the two beds. In our bed, solids were fed in a more uniform way with higher lateral velocity component, which helps improve the fluidization quality, while the decentering feeding of solids into the bed by Issangya et al. (2010) aggregates the non-uniform flow distribution in bed and thus results into reduced fluidization quality.