Data di Pubblicazione:
2015
Citazione:
First-Principles Non-Equilibrium Dynamic Modelling of Agitated Thin-Film Evaporators / F. Rossi, M. Corbetta, D. Geraci, C. Pirola, F. Manenti. - In: CHEMICAL ENGINEERING TRANSACTIONS. - ISSN 2283-9216. - :43(2015), pp. 1429-1434. [10.3303/CET1543239]
Abstract:
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.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
F. Rossi, M. Corbetta, D. Geraci, C. Pirola, F. Manenti
Link alla scheda completa: