CFD modeling of an industrial scale two-fluid nozzle fluidized bed granulator

[Display omitted] •Modeling of three-phase dense bottom spray fluidized bed granulation of urea.•Solving heat and mass equations in a simulated industrial-scale granulator.•Droplets’ diameter determination in atomization process.•Comparing simulated bed height with measured industrial data.•Determin...

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Vydané v:Chemical engineering research & design Ročník 159; s. 605 - 614
Hlavní autori: Tabeei, A., Samimi, A., Mohebbi-Kalhori, D.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Rugby Elsevier B.V 01.07.2020
Elsevier Science Ltd
Predmet:
Atomization
Atomizing
Bed expansions
CFD
Computational fluid dynamics
Computational mathematics
Computer simulation
Drop size distribution
Droplets
Dynamic models
Eulerian–Lagrangian approach
Fluid dynamics
Fluidization
Fluidized bed reactors
Fluidized beds
Granulation
Granulators
Moisture content
Nozzles
Simulation
Three dimensional models
Two-fluid nozzle
Urea
CFD
Eulerian–Lagrangian approach
Two-fluid nozzle
Fluidization
Atomization
ISSN:0263-8762, 1744-3563
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Popis
Shrnutí:[Display omitted] •Modeling of three-phase dense bottom spray fluidized bed granulation of urea.•Solving heat and mass equations in a simulated industrial-scale granulator.•Droplets’ diameter determination in atomization process.•Comparing simulated bed height with measured industrial data.•Determination of temperature changes and water content evaporation in system. A 3D computational fluid dynamic modeling of atomization and fluidization of urea was simulated in an external mixing, bottom spray, fluidized bed granulator. The Eulerian–Lagrangian approach was used to predict the mean diameter of melt urea droplets similar to the droplets produced by an industrial scale two-fluid nozzle under hot atomized air. Temperature changes and evaporation of water content from droplets were determined during simulations. Furthermore, three-phase fluidization was simulated in the Eulerian approach whereby the bed expansion of the granulator was predicted. The mean diameter of droplets and bed height were found in good agreement with the empirical correlation and the real bed height, as characterized by a level transmitter instrument in the industrial granulator, respectively. The important features of this study included solving mass, heat and hydraulic equations simultaneously, as well as simulating a real urea fluidized bed granulation unit.
Bibliografia:ObjectType-Article-1
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content type line 14
ISSN:0263-8762
1744-3563
DOI:10.1016/j.cherd.2020.05.020