A new technique for recovering energy in thermally coupled distillation using vapor recompression cycles


Autoria(s): Navarro Amorós, Miguel Ángel; Ruiz-Femenia, Rubén; Caballero, José A.
Contribuinte(s)

Universidad de Alicante. Departamento de Ingeniería Civil

Computer Optimization of Chemical Engineering Processes and Technologies (CONCEPT)

Data(s)

20/06/2014

20/06/2014

01/10/2013

Resumo

Even though it has been proved that a fully thermally coupled distillation (TCD) system minimizes the energy used by a sequence of columns, it is well-known that vapor/liquid transfers between different sections produce an unavoidable excess of vapor (liquid) in some of them, increasing both the investment and operating costs. It is proposed here to take advantage of this situation by extracting the extra vapor/liquid and subjecting it to a direct/reverse vapor compression cycle. This new arrangement restores the optimal operating conditions of some of the affected sections with energy savings of around 20–30% compared with conventional TCD columns. Various examples, including the direct and reverse vapor recompression cycles, are presented. Furthermore, in each example, all possible modes of distillation (direct, indirect and Petlyuk distillation) with and without vapor recompression cycles (VRC) are compared to ensure that this approach delivers the best results.

The authors would like to acknowledge financial support from the Spanish Ministerio de Ciencias e Innovación (PPQ, CTQ2009–14420-C02-02 and CTQ2012–37039-C02-02).

Identificador

AIChE Journal. 2013, 59(10): 3767-3781. doi:10.1002/aic.14137

0001-1541 (Print)

1547-5905 (Online)

http://hdl.handle.net/10045/38359

10.1002/aic.14137

Idioma(s)

eng

Publicador

American Institute of Chemical Engineers

Relação

http://dx.doi.org/10.1002/aic.14137

Direitos

© 2013 American Institute of Chemical Engineers

info:eu-repo/semantics/openAccess

Palavras-Chave #Distillation #Design (process simulation) #Process synthesis #Simulation #Process #Ingeniería Química
Tipo

info:eu-repo/semantics/article