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Fluidization behavior and liquid injection in three-dimensional prismatic spouted beds

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Fluidization behavior and liquid injection in three-dimensional prismatic spouted beds (Volume 14)

Swantje Pietsch (Author)

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ISBN-13 (Hard Copy) 9783736999497
ISBN-13 (eBook) 9783736989498
Language English
Page Number 198
Lamination of Cover matt
Edition 1.
Book Series SPE-Schriftenreihe
Volume 14
Publication Place Göttingen
Place of Dissertation TU Hamburg
Publication Date 2019-01-15
General Categorization Dissertation
Departments Mechanical and process engineering
Keywords spouted bed, liquid injection, coating quality, CFD-DEM simulations, residence time distributions, Partical size, density, Envelope density, Resitution coefficient, Youngs modulus, Friction, fluidization velocity, replica, Tracer production, RTD experiments, time models, OCT, Light microscope, X-ray microtomography, Coarse - gaining, Partical detection, Mesh independence, Drag model, Droplet injection, rCFD, Residence time measurements,
URL to External Homepage https://www.tuhh.de/spe/research/dissertations.html
Description

In this PhD thesis, the flow stability in a laboratory three-dimensional prismatic spouted bed is investigated both experimentally and in CFD-DEM simulations. Liquid is injected in bottom-spray configuration with the aim of a homogeneous distribution of the coating suspension on the whole particle bed. The range of stable spouting is increased by the installation of two parallel draft plates. Nevertheless, the instable spouting regime is found to be advantageous for obtaining a homogeneous coating as the draft plates prevent the mixing in the depth of the apparatus. In addition to the investigations on laboratory scale, the residence time behavior in a continuous pilot scale spouted bed is characterized using a novel tracer method with magnetizable particles. The back-mixing in the apparatus is reduced by the insertion of separation plates with defined transfer geometries.