Thermal separation processes such as evaporation and distillation are energy intensive. In the course of their development, the aim of reducing energy costs first led to multiple-effect evaporation (MEE), then to thermal vapour recompression (TVR), and finally, to the use of mechanical vapour recompression (MVR).
MEE, TVR and MVR are three main evaporation technologies available now for reducing energy consumption in the process. They can be applied singly, or in combinations .
Among the three evaporation technologies, MVR is the most energy effective.