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Prediction of solids circulation rate of cork particles in an ambient-pressure pilot-scale circulating fluidized bed / Yue Huang in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - p. 134-141 Titre : Prediction of solids circulation rate of cork particles in an ambient-pressure pilot-scale circulating fluidized bed Type de document : texte imprimé Auteurs : Yue Huang, Editeur scientifique ; Richard Turton, Editeur scientifique ; Parviz Famouri, Editeur scientifique Année de publication : 2009 Article en page(s) : p. 134-141 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Solids  Circulation  Cork  Particles  Circulating  fluidized  beds  (CFB)  Standpipe  Cork  particles Résumé : Circulating fluidized beds (CFB) are currently used in many industrial processes for noncatalytic and catalytic gas-solid reactions. The prediction of solids flow rate is important because its effective control is the key to smooth operation of a CFB system. This paper presents a method for solids flow metering from pressure drop measurements in the standpipe dense phase. A model based on the Ergun equation is developed to predict the solids flow rate and voidage in the dense phase of the standpipe. The profile of the solids flow rate under unsteady state is also presented. With the use of this method, the dynamic response time at different locations along the standpipe of a pilot-scale fluidized bed operating at ambient conditions with 812 μm cork particles is estimated successfully. Through the use of a pressure balance analysis, solids flow models for the standpipe, riser, and other sections of the flow loop are combined to give an integrated CFB model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8001843 [article] Prediction of solids circulation rate of cork particles in an ambient-pressure pilot-scale circulating fluidized bed [texte imprimé] / Yue Huang, Editeur scientifique ; Richard Turton, Editeur scientifique ; Parviz Famouri, Editeur scientifique . - 2009 . - p. 134-141. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - p. 134-141 Mots-clés : Solids  Circulation  Cork  Particles  Circulating  fluidized  beds  (CFB)  Standpipe  Cork  particles Résumé : Circulating fluidized beds (CFB) are currently used in many industrial processes for noncatalytic and catalytic gas-solid reactions. The prediction of solids flow rate is important because its effective control is the key to smooth operation of a CFB system. This paper presents a method for solids flow metering from pressure drop measurements in the standpipe dense phase. A model based on the Ergun equation is developed to predict the solids flow rate and voidage in the dense phase of the standpipe. The profile of the solids flow rate under unsteady state is also presented. With the use of this method, the dynamic response time at different locations along the standpipe of a pilot-scale fluidized bed operating at ambient conditions with 812 μm cork particles is estimated successfully. Through the use of a pressure balance analysis, solids flow models for the standpipe, riser, and other sections of the flow loop are combined to give an integrated CFB model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8001843