First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators

Agitated Thin-Film Evaporators (ATFE) are frequently employed in the industrial practice for instance they found important applications in pharmaceuticals, pulp & paper, bio-based chemicals production and food industry. They are characterized by the possibility to process high viscosity liquids...

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Main Authors: F. Rossi, M. Corbetta, D. Geraci, C. Pirola, F. Manenti
Format: Article
Language:English
Published: AIDIC Servizi S.r.l. 2015-05-01
Series:Chemical Engineering Transactions
Online Access:https://www.cetjournal.it/index.php/cet/article/view/5006
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spelling doaj-ffdab43c90fc4cfc94629d24c0575a8a2021-02-20T21:11:40ZengAIDIC Servizi S.r.l.Chemical Engineering Transactions2283-92162015-05-014310.3303/CET1543239First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film EvaporatorsF. RossiM. CorbettaD. GeraciC. PirolaF. ManentiAgitated Thin-Film Evaporators (ATFE) are frequently employed in the industrial practice for instance they found important applications in pharmaceuticals, pulp & paper, bio-based chemicals production and food industry. They are characterized by the possibility to process high viscosity liquids or liquids with suspended solid particles exploiting the mixing turbulence realized by the impeller. These features allow, for instance, to recover light heat sensitive compounds from high-boiling viscous liquids or to strip volatiles from a product up to residual traces. Their performance and optimal design is significantly influenced by blades number, impeller speed, heating policy and changes in the inlet mixture composition. The latter is a quite common issue, especially in the food and biotech industry. This paper deals with the development of a first-principles non-equilibrium evaporator dynamic model that is able to predict the influence of the key operating conditions and boundary conditions on the evaporator performance. The adopted modelling strategy implies the use of the finite volumes method, by discretising the evaporator into several slices that are modelled as two-phase pseudo-CSTRs. Moreover, heat and mass transfer are considered with the use of suitable correlations. Finally, a case study, based on the ATFE for sugar aqueous solution concentration, is used to test the model.https://www.cetjournal.it/index.php/cet/article/view/5006
collection DOAJ
language English
format Article
sources DOAJ
author F. Rossi
M. Corbetta
D. Geraci
C. Pirola
F. Manenti
spellingShingle F. Rossi
M. Corbetta
D. Geraci
C. Pirola
F. Manenti
First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators
Chemical Engineering Transactions
author_facet F. Rossi
M. Corbetta
D. Geraci
C. Pirola
F. Manenti
author_sort F. Rossi
title First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators
title_short First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators
title_full First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators
title_fullStr First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators
title_full_unstemmed First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators
title_sort first-principles non-equilibrium dynamic modelling of agitated thin-film evaporators
publisher AIDIC Servizi S.r.l.
series Chemical Engineering Transactions
issn 2283-9216
publishDate 2015-05-01
description Agitated Thin-Film Evaporators (ATFE) are frequently employed in the industrial practice for instance they found important applications in pharmaceuticals, pulp & paper, bio-based chemicals production and food industry. They are characterized by the possibility to process high viscosity liquids or liquids with suspended solid particles exploiting the mixing turbulence realized by the impeller. These features allow, for instance, to recover light heat sensitive compounds from high-boiling viscous liquids or to strip volatiles from a product up to residual traces. Their performance and optimal design is significantly influenced by blades number, impeller speed, heating policy and changes in the inlet mixture composition. The latter is a quite common issue, especially in the food and biotech industry. This paper deals with the development of a first-principles non-equilibrium evaporator dynamic model that is able to predict the influence of the key operating conditions and boundary conditions on the evaporator performance. The adopted modelling strategy implies the use of the finite volumes method, by discretising the evaporator into several slices that are modelled as two-phase pseudo-CSTRs. Moreover, heat and mass transfer are considered with the use of suitable correlations. Finally, a case study, based on the ATFE for sugar aqueous solution concentration, is used to test the model.
url https://www.cetjournal.it/index.php/cet/article/view/5006
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AT cpirola firstprinciplesnonequilibriumdynamicmodellingofagitatedthinfilmevaporators
AT fmanenti firstprinciplesnonequilibriumdynamicmodellingofagitatedthinfilmevaporators
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