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Near-Optimization of Operating Conditions and Residence Times in Multizone Dryers for Polymer Coatings

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Title Near-Optimization of Operating Conditions and Residence Times in Multizone Dryers for Polymer Coatings
 
Creator ARYA, RK
VINJAMUR, M
 
Subject free-volume theory
solvent systems
diffusion
films
temperature
 
Description Several polymeric coatings are dried by blowing jets of hot air on them from the top and bottom sides in multizone dryers. The goal of quickly removing solvent from a coating by manipulating air flow and temperature, together called operating conditions in this work, conflicts with the goal of producing blister-free coatings. Optimum operating conditions ensure both minimum residual solvent and no defects. Determining optimum conditions for multizone dryers is a difficult task with severe convergence problems. In this work, an easy method is developed to determine near-optimum operating conditions and residence times. The results indicate that the air flow on the top side should always be lower than or equal to that on the bottom side; the minimum residence time in first zone should be such that, toward the end, the solvent concentration starts to fall at the bottom. As long as the residence times are reasonably long, several different combinations of residence times in the second and subsequent zones nearly minimize residual solvent.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T13:44:13Z
2011-12-26T12:48:24Z
2011-12-27T05:37:07Z
2011-07-14T13:44:13Z
2011-12-26T12:48:24Z
2011-12-27T05:37:07Z
2009
 
Type Article
 
Identifier INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 48(23), 10504-10514
0888-5885
http://dx.doi.org/10.1021/ie900604f
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3970
http://hdl.handle.net/10054/3970
 
Language en