关键词: evaporation;heat integration;grand composite curve;multi-effect evaporation;vapour recompression evaporator

Abstract: In this paper, through two case studies, evaporation systems are considered in the context
of overall process, and then are optimized to obtain energy-saving effect. The possible
evaporation schemes are given when integrated with the background process and how to
optimize the evaporator is shown. From the case studies, it can be seen that sometimes
incomplete integration and heat pump evaporation are better than complete integration so
should be considered as candidate retrofit schemes.

Key words: evaporation, heat integration, grand composite curve, multi-effect evaporation, vapour recompression evaporator