Coal chemical industry waste brine, separation of sodium sulfate and sodium chloride
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This post was last edited by Long Hai/*n on 2015-6-12 07:39. In the production of fine chemicals, large amounts of saline wastewater are generated, which contain significant amounts of organic substances; treating such wastewater is difficult. The salt resulting from evaporation and concentration is usually treated as hazardous waste, imposing a heavy burden on companies in terms of environmental management. Is there a way to separate the salt from it and recover the salt as a product, thereby **significantly reducing the costs associated with waste disposal? (1) Treatment of waste brine containing sodium chloride ； (2) Treatment of waste brine containing sodium sulfate and sodium chloride ； It would be best to have successful cases.
Of course. In some current processes for producing epichlorohydrin using the glycerol method, large amounts of high-salt wastewater are generated. Some advanced processes are able to utilize this high-salt wastewater as brine for ion-exchange membrane caustic production, or to recover the salts for use as raw materials in caustic manufacturing.
Brother upstairs, you must be quite familiar with this craft. I have a question: Have you come across wastewater systems that contain a mixture of sodium persulfate and sodium chloride? I’d appreciate your advice.
We often have waste salt recovery centrifuges required to separate a mixture of sodium sulfate and sodium chloride
Hello, we have tried using resin as a catalyst to achieve separation purposes. Another approach involves using macroporous adsorption resins to absorb organic substances, thereby reducing COD and carrying out decolorization; as a result, the salt that is evaporated is colorless. It meets the requirements for industrial salt.
I know a little about it, but I won’t casually tell others, because these technologies and processes aren’t mine; and even if they were, I wouldn’t just share them on the internet.
Sodium sulfate and sodium chloride can be separated from each other, and the purity of sodium chloride can be made very high; we possess such technology
What are the current levels of sodium sulfate and sodium chloride in this wastewater?
Baiyi Chemical began using waste chemical sodium chloride brine for ion-exchange membrane soda production five years ago. Approximately 30,000 tons of solid salts are recycled each year, generating economic benefits in the tens of millions per year.
The MVR here. But now I’m considering installing a concentration unit before the MVR, so that the waste brine containing sodium sulfate and sodium chloride reaches a higher concentration before it goes into the MVR for evaporation and concentration, thereby reducing costs associated with emissions control. However, such equipment is very difficult to find at the moment
We are mainly engaged in the wastewater treatment for the fine chemical industry, including pretreatment and subsequent biochemical treatment. Sodium chloride and sodium sulfate can certainly be separated out. We have extensive experience; please contact QQ452848641 if needed