Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system

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 air pollution and pollution

Active Publication Date: 2015-09-30
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 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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  • Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system
  • Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system
  • Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system

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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 (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid. The system comprises a first concentrating tower, a second concentrating tower, a third concentrating tower, a fourth concentrating tower, a fifth concentrating tower, a rectifying tower and a deacidification tower. The invention also discloses a recovery method of the seven-tower five-effect rectification system for the DMAC or DMF waste liquid, and the recovery method comprises the steps of recovery treatment of the DMAC and DMF waste liquid, recovery treatment of high-boiling products and solids, recovery treatment of water and recovery treatment of steam. The DMAC and DMF waste liquid is concentrated at a temperature within 100 DEG C, and then is subjected to rectification and deacidification at a temperature within 105 DEG C, the whole process is performed at a low temperature, DMAC and DMF cannot be decomposed basically, the recovery rate of DMAC and DMF finished products is more than 99%, and meanwhile, the content of dimethylamine in tower top water is less than 30ppm, so that the problem of water pollution is solved.

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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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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