How to treat waste liquid from the alkali scrubber tower
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I would like to ask my colleagues: How do you handle the waste liquid from the alkali scrubbing tower after vinyl chloride synthesis?
We deliver directly. It is said that some manufacturers use it to produce sodium hypochlorite, but this is presumed to be difficult and not very profitable.
Prepare sodium hypochlorite? Is it possible? Isn’t the main component of the waste liquid from the alkali washing tower sodium hydroxide? Are it chlorine, alkali, and water that are mixed together in a venturi?
Here, it is directly sent to wastewater treatment for use in neutralizing the discharged water.
After neutralization, sodium sulfide is added, and the mixture is sent to the wastewater treatment process for further processing
Can chlorine, caustic soda, and spent caustic soda be mixed in a venturi?
For the new project we are working on, the waste alkali here is directly discharged into the sewage treatment system. No one buys this waste lye; the old equipment is given away for free.
It is discharged to the mercury treatment process together with the mercury-containing wastewater from the synthesis process, to neutralize the pH of the wastewater
Our factory sends part of the waste alkaline solution to the electrolysis workshop for the production of sodium hypochlorite, while another portion is sent to the wastewater treatment system to neutralize acidic wastewater
Option 1: Use sodium hypochlorite, but be mindful of the impact of its impurities on subsequent systems. Option 2: Neutralize the waste acidic water, but ensure proper control of COD levels. Option 3: If a high alkali concentration is required, consider hiring external services, but pay attention to their recycling qualifications