Modeling of the Spray Zone for Particle Wetting in a Fluidized Bed

被引：17

作者：

Heine, Manuel ^{[1
]}

Antonyuk, Sergiy ^{[1
]}

Fries, Lennart ^{[2
]}

Niederreiter, Gerhard ^{[2
]}

Heinrich, Stefan ^{[1
]}

Palzer, Stefan ^{[3
]}

机构：

[1] Hamburg Univ Technol, Inst Solids Proc Engn & Particle Technol, D-21073 Hamburg, Germany

[2] Nestle Res Ctr, CH-1000 Lausanne 26, Switzerland

[3] Nestle Prod Technol Ctr York, York YO91 1XY, N Yorkshire, England

来源：

CHEMIE INGENIEUR TECHNIK | 2013年 / 85卷 / 03期

关键词：

Computational fluid dynamics; Discrete element method; Droplets; Fluidized bed; Particle wettin; Spray; DISCRETIZED POPULATION BALANCE; GRANULATION; SIMULATION; FLOW; DYNAMICS; ELEMENT; GROWTH; CFD; DEM;

D O I：

10.1002/cite.201200148

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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.

引用

页码：280 / 289

页数：10

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