System and method for continuous freeze concentration of aqueous solution

Abstract

The invention discloses a system and a method for continuous freeze concentration of an aqueous solution. The system comprises an ice making device, an aging device and a washing device; the ice making device comprises an ice maker, and the inner part is provided with a surface scraping type heat exchanger, in order to prepare primary ice slurry; the aging device comprises an aging machine, the aging machine and a top opening of the ice making machine are communicated, wherein a screw is provided for pushing the aged primary ice slurry to the washing device during rotation; the washing devicecomprises a washer, an ice shaver and a secondary ice slurry circulating device; the washing device is a cylindrical form cylindrical shell which is vertically arranged with an upper opening, a porouspiston with up-and-down motion is arranged in the device, in order to produce an ice crystal accumulation bed by compacting; the ice shaver is used for cutting the upper end of the ice crystal accumulation bed into ice crystal fragments; the secondary ice slurry circulating device is used for mixing ice crystal fragments and washing water into secondary ice slurry and circulating the secondary ice slurry to a secondary ice slurry storing tank. A corresponding method is utilization of the system for carrying out continuous freeze condensation. The system and the method have the advantages of low energy consumption, and good ice crystal and mother liquor separating effects.

Description

technical field [0001] The invention belongs to the technical field of solution concentration, and in particular relates to an aqueous solution continuous freezing concentration system and method. Background technique [0002] In the current production process, it is often necessary to concentrate the aqueous solution, especially in the production of beverages and pharmaceuticals. At present, the common methods of concentration are: 1) evaporation and concentration, using atmospheric pressure evaporation and single-effect or multi-effect vacuum evaporation to carry out evaporation and concentration. This method is mature in technology and widely used, but it requires high temperature, and it is easy to destroy heat-sensitive components so as to denature or cause aroma volatilization or loss of flavor components. For example, when evaporating and concentrating fruit and vegetable juices, it often results in the destruction of vitamins, deepening of color, and changes in tast...

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Problems solved by technology

[0009] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a continuous freezing and concentration system and method for aqueous solution, aiming at solving the problem of high energy consumption in the prior art , Difficulty separating ice crystals from mother liquor and other technical problems

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