One-dimensional phosphate flash dryer model for design application

The present paper studies the design of a bench scale flash dryer for phosphate particles using a one-dimensional steady-state model. The model was based on the two-fluid theory considering momentum, heat, and mass transfer between the solid and gas phases for a dilute gas-solid suspension flow and...

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Bibliographic Details
Published in:Drying technology 2019-01, Vol.37 (2), p.139-148
Main Authors: El Hallaoui, Zhor, Vaudreuil, S., Moudakkar, T., Bounahmidi, T.
Format: Article
Language:English
Subjects:
Air temperature
Design
Differential equations
Mass transfer
mathematical modeling
Moisture content
Nonlinear differential equations
Nonlinear equations
phosphate particles
Phosphates
pneumatic drying
Runge-Kutta method
Sensitivity analysis
Solid suspensions
Steady state models
Vapor phases
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Summary:The present paper studies the design of a bench scale flash dryer for phosphate particles using a one-dimensional steady-state model. The model was based on the two-fluid theory considering momentum, heat, and mass transfer between the solid and gas phases for a dilute gas-solid suspension flow and for which solid interactions were neglected. The set of coupled nonlinear differential equations of the model was solved using a Runge-Kutta method. A sensitivity analysis for inlet air and solid velocity, air temperature and pressure, air and solid moisture content, and for tube diameter and length was performed to design phosphate bench scale flash dryer to reduce the solid moisture content from 18 to 2%. An analysis of the results enabled choosing the appropriate conditions for experiments of phosphate drying for a hot air stream inlet of 200°C, in a flash dryer of 1.7 m length and 0.2 m internal diameter.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2018.1441867