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Six-tower four-effect rectification system of DMAC or DMF waste liquid, and recovery method thereof

A rectification system and waste liquid technology, applied in the field of separation and purification of DMAC or DMF, can solve problems such as air pollution and pollution, and achieve high recovery rate and good product quality

Inactive Publication Date: 2015-08-12
常州冀德环保科技有限公司
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  • Abstract
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  • 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 six-tower four-effect rectification system and its recovery method with high recovery rate and good recovery product quality of DMAC or DMF waste liquid

Method used

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  • Six-tower four-effect rectification system of DMAC or DMF waste liquid, and recovery method thereof
  • Six-tower four-effect rectification system of DMAC or DMF waste liquid, and recovery method thereof
  • Six-tower four-effect rectification system of DMAC or DMF waste liquid, and recovery method thereof

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Embodiment Construction

[0049] A six-tower four-effect rectification system for DMAC or DMF waste liquid, including the first concentration tower, the second concentration tower, the third concentration tower, the fourth concentration tower, the rectification tower and the deacidification tower, the waste liquid in the tank area The material outlet of the tank 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 connected to the second concentration tower through the T101 discharge pump. The material inlet of the tower is connected, the material outlet of the second concentration tower is connected with the material inlet of the third concentration tower through the T102 discharge pump, and the material outlet of the third concentration tower is connected with the liquid phase material inlet of the f...

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Abstract

The present invention discloses a six-tower four-effect rectification system of a DMAC and DMF waste liquid. The system comprises a first concentration tower, a second concentration tower, a third concentration tower, a fourth concentration tower, a rectification tower, and a deacidification tower. The invention further discloses a recovery method of the system, wherein the recovery method comprises DMAC and DMF waste liquid recovery treatment, high boiling point material and solid state material recovery treatment, water recycling, and steam recycling. According to the present invention, DMAC and DMF are concentrated within a temperature of 100 DEG C and are rectified and deacidified within a temperature of 105 DEG C, such that the whole process is completely performed at the low temperature, DMAC and DMF substantially are not decomposed, and the DMAC and DMF finished product recovery rate is more than 99%; and with the system and the recovery method, the problems of solid waste pollution and air pollution are solved.

Description

technical field [0001] The invention belongs to the field of separation and purification of DMAC or DMF, in particular to a six-tower four-effect rectification system of 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 liqu...

Claims

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Application Information

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IPC IPC(8): C07C233/05C07C233/03C07C231/24
Inventor 章旭元
Owner 常州冀德环保科技有限公司
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