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Method for treating artificial leather dimethylamine wastewater and equipment thereof

A technology of dimethylamine and artificial leather, applied in the field of artificial leather dimethylamine wastewater treatment method and its device, can solve the problems of easy volatilization, unpleasantness, low boiling point, etc., and achieve the effect of no secondary pollution, high removal efficiency and simple process

Pending Publication Date: 2017-05-31
浙江永保环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although dimethylamine is not very toxic, it has a low boiling point, is volatile, and is easily soluble in water.
It has a strong foul smell, which will make people feel unpleasant. There are many problems in the use of boiler incineration and biochemical treatment

Method used

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  • Method for treating artificial leather dimethylamine wastewater and equipment thereof
  • Method for treating artificial leather dimethylamine wastewater and equipment thereof
  • Method for treating artificial leather dimethylamine wastewater and equipment thereof

Examples

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Embodiment example 1

[0037] In a synthetic leather enterprise, a large amount of wastewater containing DMF solvent will be produced during the production process of synthetic leather wet coating process. The DMF in the wastewater can be recovered by rectification. During the recovery process, DMF will react with water to form dimethylamine and formic acid, in addition, DMF itself will decompose at high temperature to generate dimethylamine and carbon monoxide. Because dimethylamine has an intolerable fishy smell, it affects the lives of surrounding residents. According to the on-site measurement and the requirements of relevant standards, the dimethylamine wastewater from the deamination rectification tower is collected for centralized treatment, and the design treatment scale is 60t / d. See the treatment process for details figure 1 .

[0038] The waste water from the deamination rectification tower of the artificial leather enterprise enters the stripping tower after being collected, and the co...

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Abstract

The invention discloses a method for treating artificial leather enterprise dimethylamine wastewater and equipment thereof. The complete equipment mainly includes a stripping tower, an absorption tower, a distilling kettle, a crystallizing kettle, a centrifuge and a drying device. In the method, the dimethylamine wastewater from a deaminization rectifying tower is collected and enters the stripping tower, the stripping tower is heated by steam and adopts air for blowing, and gas phase dimethylamine is generated, the gas phase dimethylamine is sent to a first-stage absorption tower, hydrochloric acid and dimethylamine are reacted to obtain a dimethylamine hydrochloride solution, uncompletely-absorbed dimethylamine tail gas is absorbed and treated by waste gas equipment and a second-stage absorption tower so as to high-altitude up-to-standard emission, the dimethylamine hydrochloride solution enters a distillation kettle for evaporation and concentration, then enters a freezing crystallization kettle for crystallization, crystals are separated by the centrifuge, the crystals are filtered and dried by drying equipment to produce a dimethylamine hydrochloride solid treated as hazardous waste. Dimethylamine can be recycled by the method, and the method has the advantages of simple process, high removal efficiency and no secondary pollution.

Description

technical field [0001] The invention relates to the technical field of physical blow-off absorption and pollutant control, in particular to a method and a device for treating artificial leather dimethylamine wastewater. Background technique [0002] Over the years, the quality of my country's water resources has continued to decline, the water environment has continued to deteriorate, and water shortages and accidents caused by pollution have continued to occur, which not only shut down factories, reduced agricultural production or even failed harvests, but also caused adverse social impacts and large economic losses. , seriously threatening the sustainable development of society and the survival of human beings. [0003] Sewage discharged from industrial production is one of the main sources of pollutants in the water environment, and tannery wastewater is one of the important sources of water environment pollution, and it is also known as the "three major wastewater" (paper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/02C02F1/20B01D53/78B01D53/54C07C209/86C07C211/04C02F101/38C02F103/30
CPCB01D53/54B01D53/78C02F1/02C02F1/20C07C209/86C02F2103/30C02F2101/38B01D2251/502C07C211/04
Inventor 雷乐成陈杰何炬平
Owner 浙江永保环境科技有限公司
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