Characterization of the pneumatic behavior of a novel spouted bed apparatus


Gryczka, O. and Heinrich, S. and Deen, N.G. and Kuipers, J.A.M. and Mörl, L. (2008) Characterization of the pneumatic behavior of a novel spouted bed apparatus. In: 9th International Conference on Circulating Fluidized Beds, CFB-9, May 13-16, 2008, Hamburg, Germany.

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Abstract:Recently the importance of spouted bed technology has significantly increased in the context of drying processes as well as granulation, agglomeration or coating processes. Particulate systems concerning very fine or non spherical particles that are difficult to fluidize, often cannot be treated in conventional fluidized beds. In contrast to those fluidized beds, the spouted bed technology with its specific flow structure offers the opportunity of stable fluidization under controlled conditions. Within this work the fluid dynamics of a novel spouted bed with two adjustable gas inlets is investigated. By analysis of gas fluctuation spectra by means of a fast Fourier transformation algorithm, different operation regimes are identified and depicted graphically. Furthermore, continuum CFD-modeling of the granular solid phase motion by means of an Euler/Euler approach and comparisons with experimental obtained velocity vector fields by means of particle image velocimetry (PIV) measurements will be presented in this work.
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