Flame spray drying: Droplet and particle flow dynamics

The work presents the fundamental research of dispersed phase flow during flame spray drying. Particle dynamics analysis and laser Doppler anemometry technique were applied to determine particle size distribution and particle velocity distribution. Results of the study showed that stable combustion...

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Bibliographic Details
Published in:Drying technology 2017-06, Vol.35 (8), p.948-956
Main Authors: Sobulska, M., Piatkowski, M., Zbicinski, I.
Format: Article
Language:English
Subjects:
Atomizing
Combustion
discrete phase
Droplets
Drying
flame spray drying
Particle size determination
Particle size distribution
particle velocity distribution
Simulation
Spray drying
Spraying
Velocity distribution
Velocity measurement
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Summary:The work presents the fundamental research of dispersed phase flow during flame spray drying. Particle dynamics analysis and laser Doppler anemometry technique were applied to determine particle size distribution and particle velocity distribution. Results of the study showed that stable combustion and longer length of the flame were observed for coarse spray (large droplets, low atomization pressure, small spraying angle, and low concentration of droplets in spray). Particle residence time in the combustion zone is the main factor affecting the increase in particle diameters due to puffing. Complex flow dynamics of dispersed phase observed at the outward regions of the flame in recirculation zones results in the formation of particle agglomerates.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2016.1233561