Integral solution refrigerating and concentrating device and refrigerating and concentrating method thereof

Abstract

The invention relates to the technical field of solution concentration, and concretely relates to an integral solution refrigerating and concentrating device and a refrigerating and concentrating method thereof. The structure of the device comprises a scraped surface heat exchanger, a rotating shaft arranged in the heat exchanger, a spiral scraper arranged around the rotating shaft and a heat insulation crystallizing-washing chamber connected to the opening of the scraped surface heat exchanger, the wall surface of the scraped surface heat exchanger is a refrigerating wall surface, the rotating shaft is connected with a drive motor, the axis direction of the rotating shaft is same to the axis direction of the crystallizing-washing chamber, the top of the crystallizing-washing chamber is provided with a water tank for pre-cooling washing water and an escape tube for discharging air in the crystallizing-washing chamber, a water inlet valve is arranged between the water tank and the crystallizing-washing chamber, the cavity of the crystallizing-washing chamber is provided with a separator plate for blocking ice crystals, and an external circulating loop is connected between the scraped surface heat exchanger and the crystallizing-washing chamber. The solution refrigerating and concentrating device has the advantages of compact structure and good concentrating effect; and the refrigerating and concentrating method of the solution refrigerating and concentrating device has the advantages of effective control of the refrigerating and concentrating process through controlling a material feed valve, the water inlet valve and a material discharging valve, easiness in operation, strong controllability and good concentrating effect.

Description

technical field [0001] The invention relates to the technical field of solution concentration, in particular to an integrated solution freeze concentration equipment and a freeze concentration method. Background technique [0002] The usual methods for concentrating the aqueous solution are: 1) Evaporation and concentration, using atmospheric pressure evaporation and single-effect or multi-effect vacuum evaporation for 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 taste and flavor. 2) Ultrafiltration or nanofiltration concentration, using membrane separation technology, the water molecules in the solution pass through ...

AI Technical Summary

Problems solved by technology

Therefore, after the ice crystals are pressurized, there will be a "pressure-melting effect", that is, a part of the ice crystals is pressed and melted into water in the centrifugal force field, and passes through the filter screen together with the mother liquor, while the other part of the ice crystals is pressed and fused to form a closed-cell ice cream. The porous and water-permeable characteristics of the stacked bed are destroyed, so that the mother liquor in the ice crystals cannot be thrown out by centrifugal force, so that the separation effect of ice crystals and mother liquor cannot be achieved.

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