Influence of Liquid on Particle Dynamics in a Rotary Fluidized Bed

Oesau, Tobias

• Publisher: Cuvillier Verlag
• Year: 2024
• eBook ISBN:
  9783736969711
• Print ISBN:
  9783736979710
• Edition: 1

In this work, the particle dynamics within a rotary granulator will be investigated using a novel measurement technique that allows the tracking of magnetic tracer particles. In particular, the influence of liquid on the dynamics will be investigated, since rotary granulators are often used for the production of agglomerates or for spheronization, where a binder liquid is used in these processes. The particle dynamics are defined by means of 2D cross-sectional diagrams and distributions of the particle velocities. In addition, models for the evaluation of the particle dynamics are applied and compared. Apart from the influence of the liquid, whereby the influence of the volume ratio and the viscosity is examined, operating parameters of the rotary granulator are varied as well.

Table of contents

• Acknowledgment
• Abstract
• Nomenclature
• 1 Introduction
• 1.1 Aim of this Work
• 1.2 Structure of this Work
• 2 Theoretical Background
• 2.1 Principle of Fluidization
• 2.2 Applications of the Fluidization Principle
• 2.3 Description of Dense Gas-Solid Flows
• 2.4 Measurement Methods for theCharacterization of Gas-Solid Flows
• 2.5 Basics of CFD-DEM Simulations
• 3 Experimental Setup
• 3.1 Rotary Granulator Setup
• 3.2 Peripheral Equipment and Process Overview
• 4 Magnetic Particle Tracking Systemand Methodology
• 4.1 Magnetic Particle Tracking Principle
• 4.2 Magnetic Particle Tracking System
• 4.3 Data Handling and Raw Data Transformation
• 4.4 Selection and Production of Magnetic Tracers
• 4.5 Validation of Measurement Accuracy
• 5 Experimental Methods
• 5.1 Determination of Bulk and Tracer ParticleProperties
• 5.2 Influence of Tracer Particle Input Position
• 5.3 Parameters of CFD-DEM Simulations
• 5.4 Experimental Methods of the MagneticParticle Tracking Measurements
• 5.5 Investigation of Transient Operation Regimes
• 6 Results and Discussion
• 6.1 Material Characterization
• 6.2 Influence of Tracer Particle Input Position
• 6.3 Influence of Liquid on the Particle Dynamics
• 6.4 Characterization of the Particle Dynamics
• 6.5 First-Time Investigation of TransientProcesses by Magnetic Particle Tracking
• 7 Conclusion
• Bibliography
• Appendices
• A Hertzian Contact Theory
• B Photograph of Rotary Granulator Setup
• C Additional Data: Influence of Volume Ratio
• D Water-Glycerine Mixture Properties
• E Additional Data: Influence of Viscosity
• F Additional Data: Model Comparison