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Modeling of the Spray Zone for Particle Wetting in a Fluidized Bed
Author(s) -
Heine Manuel,
Antonyuk Sergiy,
Fries Lennart,
Niederreiter Gerhard,
Heinrich Stefan,
Palzer Stefan
Publication year - 2013
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201200148
Subject(s) - wetting , economies of agglomeration , agglomerate , materials science , conical surface , particle (ecology) , spray nozzle , fluidized bed , discrete element method , nozzle , mechanics , capillary action , dissipation , composite material , chemical engineering , thermodynamics , oceanography , physics , engineering , geology
In a spray agglomeration process the particle wetting influences the agglomerate growth and particle dynamics in the granulator. The mass of binder liquid that is deposited on single particles affects the amount of energy dissipation during particle contacts. For the agglomeration of colliding particles the whole impact energy has to be dissipated due to viscous and capillary adhesion forces in the liquid film and plastic deformation of the material. Therefore, a detailed knowledge of the particle wetting is necessary to model the agglomeration process. This contribution uses a coupled DEM‐CFD approach to describe the spray zone of a two‐fluid nozzle in a fluidized bed agglomerator. Droplets modeled as discrete elements showed the formation of a spray zone with a conical shape. Simulations of the spray zone and the wetting of single particles are in good agreement with experimental results.