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CLC number: TQ018 ; TE624.41

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Received: 2006-08-10

Revision Accepted: 2006-10-24

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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.2 P.301-312


Prediction of wall deposition behaviour in a pilot-scale spray dryer using deposition correlations for pipe flows

Author(s):  KOTA K., LANGRISH T.A.G.

Affiliation(s):  School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, Australia

Corresponding email(s):   tim.langrish@usyd.edu.au

Key Words:  Spray dryer, Pipe correlations, Particle deposition

KOTA K., LANGRISH T.A.G.. Prediction of wall deposition behaviour in a pilot-scale spray dryer using deposition correlations for pipe flows[J]. Journal of Zhejiang University Science A, 2007, 8(2): 301-312.

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%DOI 10.1631/jzus.2007.A0301

T1 - Prediction of wall deposition behaviour in a pilot-scale spray dryer using deposition correlations for pipe flows
A1 - KOTA K.
J0 - Journal of Zhejiang University Science A
VL - 8
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SP - 301
EP - 312
%@ 1673-565X
Y1 - 2007
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2007.A0301

The particle deposition behaviour of skim milk, water and maltodextrin in the conical section of a pilot-scale spray dryer was predicted using simple correlations for particle depositions in pipes. The predicted particle deposition fluxes of these materials were then compared with the measured deposition fluxes. The predicted particle deposition regimes of the spray dryer were expected to be in the diffusional and mixed (diffusional and inertial) regimes, but the experimental results suggested that the particle deposition was mainly in the inertial regime. Therefore, using the pipe correlations for predicting deposition in a pilot-scale spray dryer suggests that they do not sufficiently represent the actual deposition behaviour. This outcome indicates that a further study of particle flow patterns needs to be carried out using numerical simulations (computational fluid dynamics, CFD) in view of the additional geometrical complexity of the spray dryer.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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