The invention relates to a freeze concentration method. After a dilute solution is frozen into a
solid state (hereinafter referred to as an ice body), heat is transferred to the ice body, and the purpose of concentration is achieved through
dissolution. After the dilute solution is frozen into an ice body, heat is transferred to the ice body in a proper
heat transfer mode, and the
concentration effect and efficiency can be effectively improved during
dissolution. And in the ice body dissolving process, the concentration of the dissolved liquid is gradually reduced from high to low. According to the requirement of the
target concentration, the solutions are retained in a segmented mode, and the solutions with different concentrations are obtained. And transferring the solution meeting the
target concentration to the next link for storage (utilization). Solutions which do not conform to the
target concentration can be repeatedly frozen and concentrated through the method, and the concentration of the solutions continues to be increased. The method is simple to operate and high in efficiency, can be operated at normal pressure and low temperature, and is suitable for freeze concentration of heat-sensitive raw materials. For example, the freeze concentration device can be used for freeze concentration of milk,
wine,
fruit juice, coffee, tea beverages, Chinese herbal
medicine liquid and the like.