In order to improve the utilization efficiency of energy and equipment, a general steady simulation model of complex cross-feed multi-effect evaporation was established for the purpose of in-depth research on rule of multi-effect evaporation. In this model, the energy-saving measures, including extra steam being led off to preheat material liquid, the condensation water flash and solution flash, were adopted, and the solid separation was also considered in the process of evaporation. Material b...