Entrainment Velocities of Calcined Limestone Particles from Fluidized Bed

Page: 303

M. Hartman, O. Trnka, K. Svoboda, and M. Pohořelý

Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Prague


Measurements of the entrainment (terminal) velocities of particles in calcination of high-grade limestone were performed using dry air under ambient conditions. Experimental runs were conducted with particles of mean sieve size 110–450 ??????m in a glass fluidization column (ID 85 mm). Thus the long-neglected Abraham approach was modified and employed to regress the obtained experimental results. A set of predictive, well-founded correlations have been developed that makes it possible to easily estimate the effective drag coefficient, entrainment velocity and/or diameter (sieve size) of rounded particles being just entrained from the fluidized bed. The proposed formulae are explicit in their form that entirely eliminates the necessity of any trial-and-error computations.


Full text (PDF)