Multi-point reciprocating continuous crystallizer

Abstract

The invention provides a multipoint reciprocating continuous crystallizer. The multipoint reciprocating continuous crystallizer is of a U-shaped twin-tower structure, and comprises a feeding hole, a purification section, a melting section, a crystallization section, a heating element, a drain outlet, a discharge hole and a residual liquid outlet; the purification section is located in the tower body on one side of the crystallizer, while the crystallization section is located in the tower body on the other side; the melting section is located at the bottom of the crystallizer; the feeding hole is located at the upper part of the purification section, while the discharging hole is located on one side of the bottom of the melting section and the drain outlet is located on the other side of the bottom of the melting section; a cooling jacket is arranged outside the crystallization section, and a coolant goes in at the top and out at the bottom; a heating jacket is arranged outside the purification section, and a heating agent goes in at the bottom and out at the top; the heating element is located in the melting section; a stirring shaft and a spiral stirrer are arranged in the crystallization section and the purification section; the temperature distribution, the crystal crystallization rates and the crystal bed layer heights of the purification section and the crystallization section are controlled by controlling the temperatures and the flow rates at a heating agent inlet and a coolant inlet. The multipoint reciprocating continuous crystallizer is capable of enhancing the effect of countercurrent washing in the crystallizer, improving the mass transfer efficiency and greatly improving the purification efficiency.

Description

technical field [0001] The invention relates to a separator for purifying organic matter in industrial crystallization, and in particular provides a separation device for preparing high-purity crystals by a novel melting crystallization method. Background technique [0002] Many chemical products currently on the market are facing overcapacity, so improving the process, increasing the purity of products and reducing production costs have become a top priority. Melt crystallization, as a method of separating and purifying organic substances with high efficiency and low energy consumption, has attracted more and more attention from various enterprises to improve the purity of products while reducing production costs. [0003] Melt crystallization is a process of separation based on the difference in freezing point between separated substances. And because no solvent is used in the melt crystallization, solvent removal and recovery are not required, there is no pollution cause...

AI Technical Summary

Problems solved by technology

[0006] In the traditional crystallizer, due to the limitation of the structure of the crystallizer, whether it is by changing the operating conditions (such as changing the reflux ratio) or changing the structural changes in the tower (controlling the direction of the reflux liquid), the countercurrent washing effect cannot be greatly improved.

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