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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (11): 1762-1774    DOI: 10.1631/jzus.2007.A1762
Applied Physics & Mechanics     
Resuspension of wall deposits in spray dryers
HANUS M.J., LANGRISH T.A.G.
School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW 2006, Australia
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Abstract  Wall deposition occurs in spray dryers when dried or partially dried particles contact and adhere to the walls during operation, thus reducing the yield of product collected. Wall deposits also present a product contamination risk and a fire or explosion risk when spray drying products that oxidize exothermically, such as milk powder. Re-entrainment is the resuspension of spray dryer wall deposits into the main gas stream for collection as product. Literature suggests that the process for re-entrainment of particles from spray dryer wall deposits is strongly dependent on particle size and gas velocity.

Key words： Wall deposition      Spray dryers      Dried particles      Re-entrainment      Adhesive forces     
Received: 04 April 2007     
CLC:  TQ018  
  TE624.41  
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HANUS M.J.
LANGRISH T.A.G.
Cite this article:

HANUS M.J., LANGRISH T.A.G.. Resuspension of wall deposits in spray dryers. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(11): 1762-1774.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A1762     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I11/1762

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