Vacuum flash distillation, concentration and cooling crystallization integrated technology

The invention discloses a vacuum flash distillation, concentration and cooling crystallization integrated technology. The technology comprises specific technological processes as follows: materials enter a vacuum flash distillation, concentration and crystallization tank and are evaporated and concentrated by adopting flash distillation in the high temperature period; then the materials falling tothe bottom of the tank after being evaporated and concentrated are sucked by a circulating pump from the bottom of the tank, the materials are pumped to the top end of the tank and subjected to forced circulation and strengthened evaporation, and concentration is stopped after the materials are concentrated to a certain concentration; a freezing medium is adopted to enter a heat exchange disc inthe tank for cooling, and the crystallization temperature required by the materials is reached; the materials after cooling crystallization enter the next procedure for filtering and separation, and qualified liquid and crysta