DM Plant Inefficiency

Thank You PW SLack, i appreciate your prompt reply, I have already send mail to resin supplier Jacobi awaiting fro thier response.

Thank you

Well, a telephone call is much quicker, interactive, and cannot be ignored; that is why the word <...discuss...> was used. Try that instead.

Now, what about the design documentation and the commissioning documentation? Where is that?

<rant>

The recent explosion of personal telephony across the globe seems to have gone hand-in-hand with a profound reluctance to actually use the damn things for the purpose for which they have been designed.

</rant>

Less quasi-personal contact if they can induce total strangers to do the work for them.

They don't have to identify themselves, either.

We seem to have become a tutoring/reference service, instead of a place for engineers to have technical discussions.

Interesting thinking.

Having seen the OP, and the existing responses to this point, here is my reply:

Al extrusion industry involves Aluminum. The rinse water from Al powder coating is going back with RO water blend, but this is being fed to the cation vessel first, then anion vessel. You need to go back and analyze the Al powder coating rinsate water as collected for several things: (1) Aluminum content of any kind, metal or ion, (2) residual organic solvent, or organic acids, or organic acid salts from the coating. Whatever is in the water has fouled/killed your resin. The Aluminum (if metal) gets stuck on resin (think filter), then the acid converts this to ions, which bind almost irreversibly to the cation resin, although some bleed may occur during service at low levels. So the cation resin is fouled. Next this low level bleed of aluminum ion contacts the anion resin and/or organic acids (if present), and essentially bind to active sites on the anion resin. Organic acids are almost 100% irreversible by regeneration - this requires a recovery technique and may not work. So the anion resin is fouled. High sodium leakage from the cation vessel will result in high conductivity product exiting from the anion vessel, and high chloride leakage from anion resin will also contribute to this. You should reconsider how you are dealing with Al powder coating rinsate - treat it separately, and specifically, based on analysis results.

One more thing: chlorine or other active halogen or oxidizer in the water will kill the anion resin from its most active state to something less desirable.

...which means that the process unit operations selected for this stream are inappropriate. Shut the plant off and consult an experienced water treatment process specialist.

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