Rectification tower of 1,4-butanediol raffinate recovery system

A recovery system and rectification tower technology, applied in the field of rectification towers, can solve the problems of enterprise economic loss, inability to meet high-purity requirements, waste of resources, etc., and achieve the effect of improving resource utilization.

Active Publication Date: 2012-05-02
XINJIANG MARKORCHEM
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Problems solved by technology

At present, this part of waste liquid of our company can only be sold to low-end customers at a price of about 800 yuan per ton. On the one hand, it causes economic losses to the company and wastes resources.
[0003] The recovery technology of 1,4-butanediol raffinate was born because of this. The adopted process is rectification. The key technology is to desig...

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  • Rectification tower of 1,4-butanediol raffinate recovery system
  • Rectification tower of 1,4-butanediol raffinate recovery system
  • Rectification tower of 1,4-butanediol raffinate recovery system

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[0015] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0016] Such as image 3 As shown, the rectification column of the 1,4-butanediol raffinate recovery system includes tower body 1, 3-stage packing section, tower top gas outlet a, reflux liquid inlet b (connected to the rectification tower reflux tank, the tower Part of the condensate cooled by the top condenser is returned to the tower as the top reflux of the rectification tower), the feed port c, and the reboiler return port d (connected to the reboiler of the rectification tower kettle, and the reboiler passes through Heating the material in the bottom of the tower to partially vaporize it and become rising steam, which provides heat and mass transfer for the rec...

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Abstract

The invention discloses a rectification tower of a 1,4-butanediol raffinate recovery system, and belongs to the technical field of chemical product rectification equipment. The rectification tower comprises a tower body, multiple stages of filling sections, an overhead gas outlet, a reflux inlet, a feed inlet, a reboiler return port, a tower bottom discharge outlet, and a reboiler communication port. A groove-type liquid distributor is arranged at the top of a first filling material section of the multistage filling material section unit. A collection tank-type liquid distributor is arranged between each two of the multiple stages of filling section. The rectification tower of a 1,4-butanediol raffinate recovery system has a recovery rate reaching above 90%, alleviates the situation of short supply of 1,4-butanediol on the domestic market, solves the problem of foreign market foreclosure, and greatly improves a resource utilization rate.

Description

technical field [0001] The invention relates to a rectification tower, which belongs to the technical field of rectification equipment for chemical products. Background technique [0002] 1,4-butanediol raffinate is a waste liquid produced in the process of removing residues in the 1,4-butanediol rectification section. The main components of the waste liquid are 1,4-butanediol, pentene Alcohol, 4-hydroxybutyraldehyde, M-BID, etc., of which the content of 1,4-butanediol is more than 70%. Since 1,4-butanediol is a high-tech fine chemical raw material, the market price is about 15,000 yuan / ton, and its downstream products have high quality requirements, and the purity generally requires more than 99.5%, so the waste Liquid has no market space in its high-end downstream products. At present, this part of waste liquid of our company can only be sold to low-end customers at a price of about 800 yuan per ton. On the one hand, it causes economic losses to the enterprise and wa...

Claims

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Application Information

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IPC IPC(8): B01D3/32C07C31/20C07C29/76C07C29/80
Inventor 孙继光孙永利徐长春段春平李兴义杜翠玲
Owner XINJIANG MARKORCHEM
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