Designing an evaporator station with effects consisting of two or more vessels

Analysis and comparison were carried out for evaporator stations having a 4th effect consisting either of two falling-film type vessels or two vessels of different designs – one Robert and one falling-film. The influence of the order, in which two apparatuses are installed in a serial layout in the 4th effect on the evaporation efficiency was analysed. A 4th effect consisting of 2 vessels was also compared to a 4th effect consisting of one vessel. The characteristics of 4th effect with one apparatus are used as a reference point for this analysis.

Significant differences were found in the heat exchange efficiency of the analysed variants. It is worth carrying out an analysis when designing the modernization/extension of an evaporator station in order to obtain an optimal layout under specific conditions.