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Falling-film crystallizer

A technology of falling film crystallization and falling film distributor, which is applied in solution crystallization, chemical instruments and methods, preparation of halogenated hydrocarbons, etc., can solve problems such as ineffective heat exchange, high heat exchange efficiency, and impact on material quality. Achieve the effects of improving heat exchange efficiency, stable material flow, and long material flow distance

Inactive Publication Date: 2013-07-10
JIANGSU PENGYU CHEM
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the crystallization process of p-dichlorobenzene, 1) The structure of the falling film sparger has a very important influence on the crystallization efficiency and quality; in order to improve the crystallization efficiency of the material, the setting of the falling film sparger should make the material evenly distributed, The flow is stable; while the structure of the existing falling film sparger cannot meet the above requirements very well, resulting in a great impact on the crystallization efficiency and quality of the material, which are further improved; 2) When the material is heat exchanged, it is often The heat pipe realizes that the principle is that the material and the heat medium in the heat exchange tube flow in reverse, and the two realize heat exchange during the reverse flow process, but this form of heat exchange is only part of the heat exchange efficiency of the material and the surface of the heat exchange tube. , the rest of the heat cannot be effectively exchanged, the heat loss is relatively large, and the temperature of each part of the material is uneven, which has a great impact on the quality of the material

Method used

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Embodiment Construction

[0015] The present invention includes a falling film distributor and a material heat exchange device arranged in series, wherein the falling film distributor: includes a cylinder body 1 and a material distribution channel formed by several continuous square holes 2 arranged in the cylinder body 1; Heat exchange device: includes a cylinder body 1 and several heat exchange tubes 3 arranged in the cylinder body, and an annular baffle vertically arranged to the heat exchange tubes 3 is arranged in the cylinder body 1 .

[0016] The quadrangular hole 2 is rhombus.

[0017] The arrangement of the annular baffles is as follows: an annular baffle 5 on both sides symmetrically arranged on both sides of the cylinder body 1 with a channel in the middle and a middle annular baffle 4 arranged in the middle of the cylinder body 1 intersect up and down. Set in sequence.

[0018] The middle annular baffle 4 and the two side annular baffles 5 have overlapping parts in horizontal projection. ...

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Abstract

The invention relates to a falling-film crystallizer, comprising a falling-film distributor and a material heat exchange device arranged in series. The falling-film distributor comprises a cylinder body and a material distribution channel arranged in the cylinder body and formed by a plurality of continuous square holes; and the material heat exchange device comprises a cylinder body and a plurality of heat exchange tubes arranged in the cylinder body, and the cylinder body is provided with annular baffle plates perpendicular to the heat exchange tubes. The invention provides a falling-film crystallizer with good crystallization efficiency and quality.

Description

technical field [0001] The invention relates to a falling film crystallizer, which belongs to a material crystallization device. Background technique [0002] In the crystallization process of p-dichlorobenzene, 1) The structure of the falling film sparger has a very important influence on the crystallization efficiency and quality; in order to improve the crystallization efficiency of the material, the setting of the falling film sparger should make the material evenly distributed, The flow is stable; while the structure of the existing falling film sparger cannot meet the above requirements very well, resulting in a great impact on the crystallization efficiency and quality of the material, which are further improved; 2) When the material is heat exchanged, it is often The heat pipe realizes that the principle is that the material and the heat medium in the heat exchange tube flow in reverse, and the two realize heat exchange during the reverse flow process, but this form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D9/02C07C25/08C07C17/392
Inventor 沈正阳沈波
Owner JIANGSU PENGYU CHEM
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