Is pre-sedimentation required for primary brine purification before feeding it into the ceramic membrane?
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Are there any requirements regarding the calcium-to-magnesium ratio for ceramic membranes, and is pre-precipitation necessary before feeding the material into the membrane? How does it perform in operation? Can the flux meet the design requirements? I hope friends from chlor-alkali plants in actual use can share their experiences.
A calcium-to-magnesium ratio of 1:1 is sufficient; no precipitation is required before feeding it into the membrane. The operation should work well, and the designed flux can generally be achieved. If you go ahead with it, my personal advice is to design with a larger margin of safety.
This post was last edited by renzongkai on 2015-11-12 at 16:04. What was said above is correct – pre-settling is not necessary, but the design margin should be larger, ideally by 20~30%. This provides better adaptability to salt, and it is also easier to maintain during later operation.
It’s not necessary; just keep stirring continuously to prevent sedimentation in the reaction tank. Also, pay attention to controlling the solid content of the circulating saltwater, as well as the filtration time and pickling cycle