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vol. 2, nr. 2 (2003)
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Physical properties - formed during spray drying - of materials with the properties of an agglomerate
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Ireneusz Zbiciński, Marzena Kwapińska
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Faculty of Process and Environmental Engineering, Technical University of £ód¼, ul. Wólczańska 213, 93-005 £ód¼ |
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vol. 2 (2003), nr. 2,
pp. 443-455
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abstract:
Systematic studies on the effect of drying and spraying conditions on the physical properties of agglomerate-like materials, i.e. a detergent and cacao, are presented in this paper. A laser PDA technique was applied in order to measure the initial droplet diameter distribution in the spray. The properties of the powders obtained during concurrent spray drying as a function of the temperature of the air drying and the flow rate, the concentration of the raw material and temperature and the initial mean particle diameter in the spray, were analyzed. As a result, it was shown that drying and atomization conditions had no effect on the apparent density of agglomerate-like materials because during drying, particles of a porous structure are formed. It was also found that the bulk density of powders changed when the apparent density of a material or powder particle morphology was changed. The authors propose neural models that predict selected physical properties of powders on the basis of the initial drying and atomization parameters. The proposed neural models well describe the physical properties of the dried products and an extension of the database to other materials would enable the construction of more general models for this group of materials.
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keywords:
spray drying, agglomerate-like materials, powder properties, neural networks
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original in:
English
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