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Publisher DOI: 10.1016/j.powtec.2019.05.030
Title: On the dynamics and control of continuous fluidized bed layering granulation with screen-mill-cycle
Language: English
Authors: Neugebauer, Christoph 
Diez, Eugen 
Bück, Andreas 
Palis, Stefan 
Heinrich, Stefan 
Kienle, Achim 
Keywords: Fluidized bed layering;Continuous operation;Stability;Control
Issue Date: 22-May-2019
Publisher: Elsevier
Source: Powder Technology (354): 765-778 (2019-09)
Journal or Series Name: Powder technology 
Abstract (english): This paper is concerned with an experimental and theoretical study of dynamics and control of fluidized bed layering granulation with external screen mill cycle. To achieve quantitative agreement between model calculations and experiments an extended dynamic process model is proposed. In contrast to previous work by Dreyschultze et al. [1] specific plant characteristics are taken explicitly into account including a more detailed model of the milling process and a classifying particle withdrawal from the granulation chamber. The model is then used to develop new control strategies. First, a novel bed mass controller is designed and validated. Afterward, a second control loop is introduced to dampen the oscillatory behavior of the particle size distribution. It is shown that the new control concepts achieve stable steady-state operation within a short time and thereby improve the process dynamics significantly. Theoretical predictions and experimental results are shown to be in good agreement.
DOI: 10.15480/882.2333
ISSN: 0032-5910
Institute: Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Type: (wissenschaftlicher) Artikel
Funded by: Support of DFG (Deutsche Forschungsgemeinschaft) within the priority program SPP 1679
Project: Untersuchung des dynamischen Verhaltens der Sprühgranulation in kontinuierlich betriebenen Wirbelschichtrinnen 
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