Falling film crystallizer

Abstract

The invention relates to a falling film crystallizer, which comprises a skirt, an equipment body, a tubular heat exchanger, a liquid distribution system and a vortex breaker, wherein the skirt is fixed on the bottom of the equipment body to support the equipment body; the equipment body comprises a lower end socket, an upper end socket and a barrel; the upper end socket is arranged on the top end of the barrel; the upper end socket and the barrel are connected through one group of flanges; the upper end socket is respectively provided with a material inlet and a steam outlet; a liquid distribution system is arranged in the upper end socket, is fixed on the upper tube plate of the tubular heat exchanger and is communicated with the tubular heat exchanger; the vortex breaker is arranged in the lower end socket and is communicated with the material inlet. The falling film crystallizer has the advantages of reasonable design and simple structure, a liquid film formed by materials in each heat exchange tube is basically event and consistent and is stable in flowing, crystallization efficiency is improved, crystallization quality is guaranteed, a liquid level in a flash groove is quiet, overflowing is evener, and meanwhile, the problem of bottom sedimentation of the flash groove is avoided.

Description

technical field [0001] The invention relates to the field of material crystallization, in particular to a falling film crystallizer. Background technique [0002] As an important chemical unit operation, crystallization plays an important role in the separation and purification of products. The crystallization process is generally divided into four categories: solution crystallization, melt crystallization, precipitation crystallization and sublimation crystallization. Falling film crystallization, as a kind of melt crystallization, is a crystallization process in which the separation is realized according to the difference in freezing point between the separated substances. The liquid material is crystallized and sweated in the crystallizer to obtain high-purity products, which can be separated into high-purity products. , low operating temperature, low pollution, energy saving and other advantages, it is often widely used in the refining and purification of products in pe...

AI Technical Summary

Problems solved by technology

[0004] At present, when the falling film crystallizer is installed, it is easy to cause the installation level deviation of the falling film crystallizer, which leads to the uniform film distribution and unstable flow of the material when the liquid distribution system distributes the material, which greatly affects the crystallization efficiency and quality of the material. big impact

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