Particle drying and crystallization characteristics in a low velocity concurrent pilot scale spray drying tower
Woo, M. W.
Chen, X. D.
- 化学化工－已发表论文 
A low velocity spray tower was built in Monash which allows the production of mono-dispersed particles. As part of a larger project in controlling the functionality of the particles produced, the computational fluid dynamics technique (CFD) was used to gain more insights into the drying characteristics of the mono-dispersed droplets. Introduction of droplet and mass transfer did not significantly alter the flow field. Analysis revealed that the wet bulb region was significant in this tower. Varying the inlet air temperature from 100 degrees C to 180 degrees C resulted in contrasting drying history. These drying kinetics were then extended to assess the in-situ crystallization phenomenon. For this spray drying tower, it was found that lower inlet temperature condition favoured a higher degree of crystallinity. (C) 2011 Elsevier B.V. All rights reserved.