Entrainment Velocities of Calcined Limestone Particles from Fluidized Bed

Authors

  • M. Hartman Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Prague
  • O. Trnka Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Prague
  • K. Svoboda Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Prague
  • M. Pohořelý Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Prague

Keywords:

fluidization, combustion, gasification, drift velocity, particulate matter, calcium oxide

Abstract

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 μm 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.

Published

2012-04-15

How to Cite

Hartman, M., Trnka, O., Svoboda, K., & Pohořelý, M. (2012). Entrainment Velocities of Calcined Limestone Particles from Fluidized Bed. Chemické Listy, 106(4), 303–306. Retrieved from http://www-.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/982

Issue

Section

Articles