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- W2028221337 abstract "A predictive mathematical model is developed to describe and characterize the key design variables of a novel Internal Circulating Fluidized Bed Combustor. The model is based on fundamental principles of heat transfer, mass transfer, hydrodynamics and reaction kinetics. Under justifiable assumptions unsteady state mathematical equations are written and solved. The input parameters of the model are gas and solid flowrates, solid circulation flux, as well as physical properties of gas and solids. The model allows to predict and to investigate the temperature, the combustible conversion, the oxygen concentration, the residence time, the voidage and the solid velocity in the riser. Experiments with spent foundry sand are undertaken in order to assess the validity of the model. The predictions for the transition period of heating clean sand and the treatment of waste compare satisfactorily to the experimental data. Un modèle mathématique prédictif est développé pour décrire et caractériser les paramètres importants dans la conception d'un nouveau réacteur à lit fluidisé circulant interne. Le modèle est basé sur les principes fondamentaux de transfert de chaleur, de transfert de masse, d'hydrodynamique et de cinétique de réaction. En posant des hypothèses justifiables, les équations mathématiques du régime transitoire sont écrites et résolues. Les paramètres d'entrée au modèle sont: les débits du gaz et du solide, le taux de circulation ainsi que les propriétés physiques des différentes phases. Le modèle permet de prédire la conversion, la concentration de l'oxygène, le temps de séjour, la porosité et la vitesse des particules solides dans le tube de montée. Les données expérimentales pour la validation du modèle proviennent du traitement thermique de sable fonderie utilisé comme déchet représentatif. Les prédictions du modèle et les résultats expérimentaux se comparent d'une manière satisfaisante pour la période de préchauffage de sable propre et le traitement du déchet." @default.
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- W2028221337 date "1999-04-01" @default.
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- W2028221337 title "Modeling of an internally circulating fluidized bed reactor for thermal treatment of industrial solid wastes" @default.
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