Modelling the dynamics of solids transport in flighted rotary dryers

Schneider, P.A., Sheehan, M.E., and Brown, S.T. (2003) Modelling the dynamics of solids transport in flighted rotary dryers. Computer Aided Chemical Engineering, 14. pp. 911-916.

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Abstract

This paper proposes a simple dynamic solids transport model for flighted rotary dryers, which results by discretising the dryer in the axial direction into a series of equivolume elements. Each resultant element is partitioned into two zones; one active and the other passive. Solids interchange between the active and passive zones is included, leading to a tanks-in-series/parallel approach, traditionally used by reaction engineers. Modelling solids transport in this manner allows the residence time distribution (RTD) characteristics of the rotary dryer to be elucidated. In this work gPROMS is used to simulate the proposed rotary dryer model. Data from a 100 tonne per hour raw sugar dryer is reconciled against the dynamic solids transport model, by estimating overall solids transport coefficients.

Item ID: 6112
Item Type: Article (Research - C1)
ISSN: 1570-7946
Keywords: flighted rotary dryers; modelling; optimisation; residence time distribution; solids transport
Date Deposited: 15 Jan 2010 06:15
FoR Codes: 09 ENGINEERING > 0904 Chemical Engineering > 090407 Process Control and Simulation @ 100%
SEO Codes: 86 MANUFACTURING > 8601 Processed Food Products and Beverages (excl. Dairy Products) > 860199 Processed Food Products and Beverages (excl. Dairy Products) not elsewhere classified @ 100%
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