A Process Integration based Approach for the Analysis of Evaporator System

A scalable new mathematical model based on the principles of Process Integration has been developed for the analysis of multiple effect evaporator (MEE) systems. It uses the concepts of stream analysis, temperature path and internal heat exchange for the formulation of model equations. In addition to above the model also takes into account variable physico-thermal properties of steam/vapor, condensate and liquor while simulating the MEE system. The present model consists of a set of linear equations and does not pose any stability or oscillation problems during solution as is generally seen in the case of models which are based on sets of nonlinear equations. The model equations are automatically generated through the computer program. To prove the utility of the present model it was run for three different liquor and flow sequences. The results thus obtained are compared with published models.