Kai Membrane production process
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This post was last edited by sunjl1981 on 2013-1-6 at 22:49. Our company uses the KAI membrane purification process for the brine. Acid and sodium sulfite need to be added in the baffle tank after the KAI membrane filter. I would like to ask my colleagues: is it better to add sodium sulfite before or after filtration, and should it be added continuously or intermittently? # ， ， &
It’s better to add it after filtration. In our company, we add it continuously after filtration; however, I’ve also seen some companies add sodium sulfite before filtration. It seems that this is all designed by Kay Membranes
Add it after filtering, but whether to add it continuously depends on whether sodium hypochlorite is added continuously
Whether sodium sulfite should be added continuously depends on your process requirements; generally, it is required that the brine after filtration must not contain free chlorine, as this can damage the resin in the downstream resin columns. Of course, if sodium hypochlorite is added to your saline, then you must continuously add sodium sulfite. In the KAI membrane filtration process, sodium sulfite is added after the filter; this is because in this process, sodium hypochlorite is used to break down organic substances and algae, preventing them from clogging the membrane. Additionally, controlling the amount of sodium hypochlorite that passes through the membrane helps to clean the membrane as well. Therefore, sodium sulfite is generally added after the filter.
PH adjustment is carried out after filtration, while sodium hypochlorite is added before the use of the Kay membrane. In fact, high levels of free chlorine can affect the lifespan of the Kay membrane! When production is stable, it’s of course better to add sodium hydride continuously! This post was last edited by Cleaner on 2008-2-21 at 13:22.]
I would like to ask: do the organic substances and algae resulting from the decomposition by sodium hypochlorite still have an impact on the membrane? I appreciate your guidance.