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A hybrid optimization technique for improvement of P-recovery in a pellet reactor

Montastruc, Ludovic and Davin, André and Azzaro-Pantel, Catherine and Pibouleau, Luc and Cabassud, Michel and Domenech, Serge A hybrid optimization technique for improvement of P-recovery in a pellet reactor. (2003) In: ESCAPE 13 13th European Symposium on Computer-Aided Process Engineering , 1-04 June 2003, Lappenrentha .

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Abstract

Emphasis in recent years has been focused on improving processes which lead to enhanced phosphate recovery. This paper studies the precipitation features of calcium phosphate in a fluidized bed reactor in a concentration range between 50 et 4mg/L and establishes the conditions for optimum phosphate removal efficiency. For this purpose, a hybrid optimization technique based on Simulated Annealing (SA) and Quadratic Programming (QP) is used to optimize the efficiency of the pellet reactor. The efficiency is computed by coupling a simple agglomeration model with a combination of elementary systems representing basic ideal flow patterns (perfect mixed flow, plug flow,…). More precisely, the superstructure represents the hydrodynamics conditions in the fluidized bed. The “kinetic” constant is obtained for each combination. The two levels of the resolution procedure are as follows: at the upper level, SA generates different combinations and at the lower level, the set of parameters is identified by a QP method for each combination. The observed results show that a simple combination of ideal flow patterns is involved in the pellet reactor modeling, which seems interesting for a future control.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com.This article is publied in the book:Computer Aided Chemical Engineering,Volume 14, 2003, Pages 779-784
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Procédés Systèmes Industriels (PSI) - Conception Optimisation Ordonnancement des Procédés (COOP)
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Réaction, mélange & séparation (RMS)
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Deposited By: Ludovic MONTASTRUC

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