A numerical bifurcation analysis of continuous fluidized bed spray granulation with external product classification

Radichkov, R.; Müller, Thomas; Kienle, Achim; Heinrich, Stefan; Peglow, Mirko; Mörl, Lothar

doi:10.1016/j.cep.2006.02.003

Cited by 61 publications

(71 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9, one can see the periodic nature of the dynamic behavior more clearly (a simulation over a longer time horizon confirms that the system actually settles on a strictly periodic orbit). The physical explanation for the found behavior may be the selective removal of large particles from the crystallizer in combination with the crystal growth rate, which has been identified as a source of instabilities in other particle systems [46,47].…”

Section: Simulation Results In Dianamentioning

confidence: 99%

Development and Nonlinear Analysis of Dynamic Plant Models in ProMoT /Diana

Mangold

Khlopov

Danker

et al. 2014

Chemie Ingenieur Technik

View full text Add to dashboard Cite

In the process design of chemical production plants, dynamic simulation plays an important role. This paper gives a short introduction to the process modeling tool ProMoT and the simulation tool Diana. Both are open‐source programs intended for the dynamic analysis of chemical engineering and biological systems. They support the implementation and analysis of large nonlinear differential algebraic systems. An overview is given on the functionality of ProMoT and Diana. The use of the tools is illustrated by their application to an innovative fluidized bed crystallization process.

show abstract

Section: Simulation Results In Dianamentioning

confidence: 99%

Development and Nonlinear Analysis of Dynamic Plant Models in ProMoT /Diana

Mangold

Khlopov

Danker

et al. 2014

Chemie Ingenieur Technik

View full text Add to dashboard Cite

show abstract

“…The product fraction is withdrawn. This setup yields highly dynamic process behavior due to complex interaction of seed particle formation, particle growth, removal and recycle, as was shown in simulations and bifurcation analysis, for example, by Heinrich et al (2002), Radichkov et al (2006) and Dreyschultze et al (in press), predicting oscillations of the PSD for certain mean diameters of milled particles. Simulated temporal evolutions of the normalized PSD density q 3 showing oscillatory and stable process behavior are shown in Fig.…”

Section: Introductionmentioning

confidence: 90%

“…In this case, the process of fluidized bed layering gets more complex, as the solid seed particles have to be generated separately, for example by spray drying, and their addition to the process has to be realized. On the other hand, external feed of seed particles can be an additional operational parameter, which can stabilize the process if chosen properly (Heinrich et al, 2002;Radichkov et al, 2006). In the present experiments, the production of seed particles is realized internally and by recycling.…”

Section: Process Descriptionmentioning

confidence: 99%

“…Schütte et al (1998) presented their data in a patent without further interpretation and without explanations regarding reproducibility. Besides Heinrich et al (2002), Radichkov et al (2006) and Dreyschultze et al (in press), a wide range of authors deal with these oscillations of PSD in simulations (for example Bück et al, 2015;Cotabarren et al, 2010;Dosta et al, 2010;Drechsler et al, 2005;Heinrich et al, 2003;Palis and Kienle, 2012;Palis and Kienle, 2014) or use them to motivate the need of process control or better models (for example Bertin et al, 2013;Cotabarren et al, 2011). But none of these references includes an experimental proof of the occurrence of PSD oscillations.…”

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Experimental investigation of process stability of continuous spray fluidized bed layering with external product separation

Schmidt

Rieck

Bück

et al. 2015

Chemical Engineering Science

View full text Add to dashboard Cite

Experimental investigation of dynamics in continuous layering with external classification. Proof of oscillations in particle size distribution (stable limit cycle). Similar periodic behavior for significant variation in mean diameter of milled particles. Milling behavior determined as key process influence. a b s t r a c tThe present work investigates experimentally continuous spray fluidized bed layering with external product separation. In this process configuration, growing particles are continuously withdrawn and classified externally by two sieves into product fraction, undersize and oversize fraction. The oversize fraction is milled and fed back to the fluidized bed alongside with the undersized fraction. New seed particles for the layering process are provided by recycling of milled particles and agglomeration of dust particles, formed by dried droplets (overspray) and attrition. Until now, this process configuration has been investigated by simulations only. For certain parameter regimes, these models predict oscillations of the particle size distribution. Based on these predictions, even theoretical controllers have already been developed to diminish these oscillations. An experimental investigation of these oscillations of the particle size has not yet been published. Our work presents a systematic study of the process and proves the existence of oscillations of the particle size distribution in the fluidized bed.

show abstract

“…In the literature, classified removal of particles has been identified as a potential source of periodic oscillations [27,28,29]. However, the additional feedback on the fluid flow has not been studied in these publications.…”

Section: Nonlinear Dynamic Behavior Of the Model Systemmentioning

confidence: 98%

Nonlinear model reduction of a continuous fluidized bed crystallizer

Mangold

Feng

Khlopov

et al. 2015

Journal of Computational and Applied Mathematics

View full text Add to dashboard Cite

Nonlinear model reduction of a continuous fluidized bed crystallizer, Journal of Computational and Applied Mathematics (2015), http://dx. AbstractThis work considers a system of a fluidized bed crystallizer and a ultrasonic attenuator, which separates an enantiomer from a liquid solution. A population balance model of the system shows autonomous oscillations over a wide range of operation conditions. Proper orthogonal decomposition is applied to obtain nonlinear reduced models of low order. An a posteriori error estimator is used to assess the quality of the reduced model during run time.

show abstract

A numerical bifurcation analysis of continuous fluidized bed spray granulation with external product classification

Cited by 61 publications

References 6 publications

Development and Nonlinear Analysis of Dynamic Plant Models in ProMoT /Diana

Development and Nonlinear Analysis of Dynamic Plant Models in ProMoT /Diana

Experimental investigation of process stability of continuous spray fluidized bed layering with external product separation

Nonlinear model reduction of a continuous fluidized bed crystallizer

Contact Info

Product

Resources

About