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Titre du Document
Energy conservation in alcohol distillery with the application of pinch technology
Auteur(s)
FICARELLA A. ; LAFORGIA D.
Résumé
The energy audit of an operating distillery producing ethyl alcohol from low quality wine and wine dregs is presented. Three different processes were analyzed : the production of raw (unrefined) alcohol using stripping columns working at pressure lower than atmospheric, the same production using columns at higher pressure and the production of neutral (refined) alcohol. The operational and design data of these three processes were used to compute mass and energy balances. The liquid streams in a distillery are multicomponent nonideal solutions. The data reported in the literature for ethyl and methyl alcohol water mixtures were utilized, together with purposely developed correlations for density, specific heat and vapor liquid equilibrium and simplified exergy formulas. The methodologies used to study the alcohol production are based on the pinch technology approach : the detailed energy balances of the three industrial processes are presented. The main step was to present the heat sources and sinks of the production processes in the grand composite curve, laying out all the thermodynamic opportunities of any heat recovery. Thermodynamic analysis methods were used to minimize the heating energy needed by the production processes when using heat pump systems. The use of heat pump systems, mainly based on mechanical vapor re-compression, has proven to be effective in energy saving and profitable in other applications, as the concentration of gelatine, distillation of organic va
Editeur
Elsevier
Identifiant
ISSN : 0196-8904 CODEN : ECMADL
Source
Energy conversion and management A. 1999, vol. 40, n° 14, pp. 1495-1514 [bibl. : 11 ref.]
Langue
Anglais
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