Scraper type surface crystallizer

Abstract

The invention discloses a scraper type surface crystallizer in the field of freezing crystallization, which comprises a crystallizing tank, wherein the bottom of the crystallizing tank is provided with a discharging port, and the top of the crystallizing tank is provided with a feeding port. The scraper type surface crystallizer is characterized in that the outer wall of the crystallizing tank is provided with a refrigeration structure, the crystallizing tank is internally provided with a stirring mechanism, and an ice scraping mechanism is arranged on the stirring mechanism; the temperature of raw materials such as fruit juice is reduced to below zero DEG C through heat exchange, so that water in the raw materials is crystallized, the raw materials are further concentrated, and meanwhile, volume of the crystals under continuous stirring of the stirring mechanism cannot become too large and cannot flow out of the discharging port, the ice scraping mechanism is driven by the stirring mechanism to continuously rotate to scrape off ice crystals on the inner wall of the crystallizing tank and blend the ice crystals into a concentrated solution, the concentrated solution is high in concentration and can be precipitated at the bottom of the crystallizing tank, and then the concentrated solution flows out of the discharging port and enters the next procedure to separate the concentrated solution from the ice crystals. Thescraper type surface crystallizer can be used for production of frozen crystallized concentrated juice.

Description

technical field

[0001] The invention relates to a crystallizer, in particular to an ice-scraping crystallizer. Background technique

[0002] In the prior art, the publication number: CN108477441A, with the publication date of 2018.09.04, is a device for continuously freezing and preparing concentrated fruit juice, which includes a refrigerant tank. The refrigerant tank is provided with a refrigerant outlet and a refrigerant inlet. A freezing tube capable of holding fruit juice, multiple freezing tubes are connected in series, and the invention also discloses a method for continuously freezing and preparing concentrated fruit juice, in which the pre-cooled fruit juice is continuously pumped into the freezing tubes, the juice flows in the series freezing tubes, and the refrigerant is The refrigerant flows in the tank, and the water in the fruit juice crystallizes and is frozen on the inner wall of the freezing tube. The concentration of the juice gradually increases. When the...

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