Transport characteristics of a cocurrent spray dryer
Article first published online: 17 JUN 2004
Copyright © 1969 American Institute of Chemical Engineers
Volume 15, Issue 5, pages 772–779, September 1969
How to Cite
Baltas, L. and Gauvin, W. H. (1969), Transport characteristics of a cocurrent spray dryer. AIChE J., 15: 772–779. doi: 10.1002/aic.690150525
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Accepted: 22 MAY 1968
- Manuscript Revised: 20 MAY 1968
- Manuscript Received: 1 NOV 1967
The design of an experimental cocurrent spray dryer and its method of operation are described. The rationale for the development of some new measurement techniques and modifications to existing ones is discussed. These techniques were used to obtain profiles at several dryer levels of the air velocity, air humidity, and spray mass velocity for the case of a 30% sodium nitrate solution sprayed into 100°C. air. Somewhat less detailed measurements of the spray moisture and radial turbulent diffusivity were also made.
The humidity and spray moisture measurements gave very nearly identical results for the progress of the evaporation along the length of the dryer. The axial injection of the spray was found to result in steep gradients for the air velocity, air humidity, and salt mass velocity but these were found to decay under the influence of turbulent mixing which is also generated by the spray injection.