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Chemical wastewater extraction recovery DMF operation process and process

by:Deyuan      2020-09-05
Dimethyl formamide ( DMF) Can is a kind of colorless transparent liquid, and water and most organic solvents miscibility, pure dimethylformamide with special smell. In the process of industrial production, sometimes need to use DMF, after a variety of process produces a large number of DMF wastewater. Such wastewater odor, high organic content, if direct emissions, will cause serious environmental pollution, at the same time is also a kind of waste of resources.

in chemical DMF wastewater, with the development of technology, enterprises start to extract DMF recovery and recycling of DMF can be recycled, and can also be achieved through subsequent wastewater biochemical treatment emissions standards.

there are many kinds of the extraction of DMF recovery method, one of more common distillation, solvent extraction, etc. But distillation process is complex, low extraction efficiency, high power consumption, high cost, compared with distillation, solvent extraction advantage more prominent. Solvent extraction solvent will DMF is adopted to extract the recycling, the main operating principle is:

will be suitable for extraction agent and DMF wastewater according to certain proportion into the equipment, through mixing, the DMF wastewater will shift to the extraction agent, then two phase separation, DMF in extraction agent, the waste water after treatment by biochemical segment can be carried out. Containing DMF extracting agent through reverse extraction, DMF was extracted reuse, extractant can be recycled.

solvent extraction method has the advantage of simple operation process, extracting agent price was cheap, high extraction efficiency, low power consumption, and low comprehensive cost, thus widely used.

solvent extraction operation when chooses the extraction equipment with extraction, extraction tower, reaction kettle, centrifugal extraction machine, etc. , but in combination with relevant data, extraction of centrifugal extraction machine recovery effect is good, has been widely applied to many fields of extraction section.

centrifugal extraction machine compared with other extraction equipment, its working principle is to rely on centrifugal force the two phase fluid fast mixing and separation, extraction of high efficiency, no entrainment.



advantage of centrifugal extraction machine:

1, the device adopts suspension single fulcrum on structure, processing area at the bottom of the bearing and mechanical seal, no leakage risk, solved the centrifugal extraction machine failure frequently, the problem of short service life, save the costs for equipment maintenance.

2, equipment capacity bigger, more energy saving, Under the condition of same capacity, its power consumption is a traditional annular structure of centrifugal extraction machine 1/10 ~ 1/3) 。

3, the equipment can choose using perfluorinated polymer materials, resistant to strong acid, Hydrochloric acid and mixed acid, etc. ) The corrosion.

4, mixing, separation effect is good, a variety of optional hybrid structure, high separation efficiency, can be applied to easily emulsifying system.
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