A continuous crystallizer

Abstract

The invention discloses a continuous crystallizer, belongs to the field of crystallizing equipment, and provides the continuous crystallizer which can be used for effectively separating crystalline particles included in a solution subjected to heat exchange of a heat exchange tube. The continuous crystallizer comprises an upper chamber, a heat exchange chamber and a crystallization chamber which are sequentially connected from top to bottom; the continuous crystallizer also comprises a diversion pipe and a separation board; the separation board is arranged in the upper chamber; the upper chamber is segmented into a top chamber positioned at the upper part and a separation chamber positioned at the lower part by the separation board; the pipe wall of the diversion pipe positioned in the separation chamber is provided with a slant through hole penetrating through the pipe wall; in addition, the trending of the slant through hole is inclined relative to the wall thickness direction of the pipe wall at a corresponding part. According to the continuous crystallizer disclosed by the invention, by arranging the separation board and a corresponding slant through hole structure, the solution can form a rotational flow state in the diversion pipe; the crystalline particles carried in part of the solution can be effectively separated by rotational flow.

Description

technical field [0001] The invention relates to the field of crystallization equipment, in particular to a continuous crystallizer. Background technique [0002] Crystallizer is a kind of equipment used for product crystallization operation, generally divided into two types: evaporative crystallizer and cooling crystallizer. A patent document with publication number CN202155069U (hereinafter referred to as document 1) discloses an "internal circulation evaporative crystallizer" (the entirety of which is hereby cited in this application). The crystallizer disclosed in this document 1, compared with the traditional external circulation crystallizer, can simplify the equipment structure, and can greatly reduce the power consumption of equipment operation, and can effectively solve the problem of using traditional external circulation crystallization equipment. Sometimes it is easy to cause the problem that the whole crystallization equipment cannot be restarted due to crystal ...

AI Technical Summary

Problems solved by technology

[0003] 1. The separation effect of the fine crystal particles mixed in the solution after heat exchange by the heat exchange tube is poor, causing most of the crystal particles to flow into the upper cylinder;

[0004] 2. The mechanism for driving and stirring is set at the bottom of the lower cylinder, which makes it inconvenient to discharge the crystallization;

[0005] 3. The lower end of the diversion cylinder rushes directly to the bottom of the lower cylinder, which is easy to cause impact on the crystallization area at the bottom of the lower cylinder, causing the deposited crystals to be washed away, resulting in poor crystallization deposition effect, which in turn affects the discharged crystallization material quality

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