Novel continuous crystallization and purification device

Abstract

The invention discloses a novel continuous crystallization and purification device, relating to the mass transfer of industrial processes and belonging to the field of solid-liquid mass transfer devices. Scrapers (9) which are in contact with the inner wall of a crystallizer are arranged in a refining section (3), a recycling section (5) and a purifying section (11), an inclined stirrer (10) welded with the scrapers (9) is arranged on a stirring shaft (1), and the rotation of the scrapers and the stirrer can maintain the suspension state of crystals in a mother liquor to prevent phenomena of channeling, wall flow and the like from generating; and a pump (15) and a solvent storage tank (16) are arranged outside a melting section (12) of the novel continuous crystallization and purification device, thus two operation manners of melting crystallization and solution crystallization in the device can be realized. The invention can be used in the mass transfer process of industrial processes of chemical, petrifaction, pharmacy, metallurgy and the like, and has the characteristics of simple structure, flexible operation manners, remarkable economic benefits and the like.

Description

technical field [0001] The invention relates to a novel continuous crystallization and purification device, which belongs to the field of mass transfer devices in industrial processes such as chemical industry, petrochemical industry, pharmaceutical industry and metallurgy. Background technique [0002] In the separation process, if the rectification method is used for the substances with close boiling points, a large number of plates and a large reflux ratio are required, so the one-time equipment investment and the cost of cooling and heating media consumed during operation will be reduced. very huge. Therefore, in industrial production, continuous crystallization is often used to separate substances with close boiling points but large differences in melting points. Due to the high separation efficiency of continuous crystallization, the reflux ratio required for a certain separation target is relatively small, generally 2 to 10 times smaller than the reflux ratio of rect...

AI Technical Summary

Problems solved by technology

For example: in the traditional crystallization device, the suspension density of crystals in the liquid phase is not uniform, and channel flow, wall flow and other phenomena often occur, so that the solid-liquid two phases cannot be in good contact, which greatly affects the purity of the product. And in the traditional melting and crystallization device, if the heating element fails, the whole device can only stop running, which is not conducive to the improvement of the annual output and benefit of the factory

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