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A seven-tower five-effect rectification system for dmac or dmf waste liquid and its recovery method

A technology of rectification system and waste liquid, which is applied in the field of separation and purification of DMAC or DMF, and can solve problems such as pollution and air pollution

Active Publication Date: 2017-07-07
常州冀德环保科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the existing environmental protection problems of air pollution and water pollution, and provide a seven-tower five-effect rectification system with high recovery rate and good recovery product quality of DMAC or DMF waste liquid and its recovery method

Method used

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  • A seven-tower five-effect rectification system for dmac or dmf waste liquid and its recovery method
  • A seven-tower five-effect rectification system for dmac or dmf waste liquid and its recovery method
  • A seven-tower five-effect rectification system for dmac or dmf waste liquid and its recovery method

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Embodiment Construction

[0052] A seven-tower five-effect rectification system for DMAC or DMF waste liquid, the seven-tower five-effect rectification system includes a first concentration tower, a second concentration tower, a third concentration tower, a fourth concentration tower, and a fifth concentration tower , rectification tower and deacidification tower,

[0053] The material outlet of the waste liquid tank in the tank area is connected to the material inlet of the feed preheater through the waste liquid pump, the material outlet of the feed preheater is connected to the material inlet of the first concentration tower, and the material outlet of the first concentration tower is discharged through T101 The pump is connected to the material inlet of the second concentration tower, the material outlet of the second concentration tower is connected to the material inlet of the third concentration tower through the T102 discharge pump, and the material outlet of the third concentration tower is con...

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Abstract

The invention discloses a seven-tower five-effect rectification system for DMAC and DMF waste liquid, comprising a first concentration tower, a second concentration tower, a third concentration tower, a fourth concentration tower, a fifth concentration tower, a rectification tower and Deacidification tower; the present invention also discloses a recovery method of a seven-tower five-effect rectification system of DMAC and DMF waste liquid, including the recovery treatment of DMAC and DMF waste liquid, the recovery treatment of high boiling matter and solid matter, the recovery of water Recycling and recycling of steam. In the present invention, DMAC and DMF are concentrated within 100°C, rectified and deacidified within 105°C, the whole process is carried out at low temperature, DMAC and DMF are basically not decomposed, and the recovery rate of DMAC and DMF products is >99%. The content of dimethylamine in the water at the top of the tower is less than 30ppm, which solves the problem of water pollution.

Description

technical field [0001] The invention belongs to the field of separation and purification of DMAC or DMF, in particular to a seven-tower five-effect rectification system for DMAC or DMF waste liquid and a recovery method thereof. Background technique [0002] DMAC, also known as N,N-dimethylacetamide, DMF, also known as N,N-dimethylformamide, is an excellent organic solvent, widely used in medicine, pesticide, film industry, leather industry, textile industry and other industries , DMAC or DMF waste liquid is produced while in use. [0003] Because DMAC or DMF is a kind of antibacterial agent, it will also kill the activated sludge in the sewage treatment tank at a low concentration. Therefore, there is no good way to treat DMAC or DMF waste liquid by biochemical treatment. In addition, from an economic point of view, it is the best choice to use rectification to treat DMAC or DMF waste liquid. At present, there are many rectification recovery methods for DMAC or DMF waste l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C07C231/24C07C233/03C07C233/05C02F103/36
Inventor 章旭元
Owner 常州冀德环保科技有限公司
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