Recovery of acid wash water from electrolytic resin towers
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Hello, sea friends: How do you handle the acid wash water from your electrolytic resin towers? We plan to recycle this acid wash water for use in primary brine. Please share your technical experience; thank you!
It mainly consists of calcium, magnesium, and sodium chloride salts, which can be sent as chemical salts.
It can be neutralized with alkaline wash water followed by desalting; otherwise, pH adjustment is still required later
It turns out it was directly discharged into the sewage treatment system
It is planned to send it for desalination, and it is necessary to pay attention to controlling those stages
I have only been exposed to ion-exchange membrane caustic soda, but I’m not very familiar with the details
The amount of wastewater generated during the regeneration of the resin tower is small, and this volume does not pose a problem for the desalination system. The acid wash water and alkali wash water from the electrolytic resin tower are combined, and then sent directly to the desalination process. What was done with the alkaline water in the original post?
The acid and alkali washing wastewater is collected in a wastewater tank; this tank is equipped with air agitation systems and alkaline addition pipelines. Once the pH level is adjusted, the wastewater can be used for chemical salt production. However, under low-load conditions, an increasing amount of water accumulates in the system, so it is recommended to retain the pipeline for wastewater treatment
Received for use in the stormwater and sewage separation system