NukeWorker Forum
Career Path => General => Topic started by: xobxdoc on Oct 26, 2009, 09:11
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Is there anyone out there with experience in resin regeneration? We are having issues with getting complete anion/cation separation.
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What do you need to know?
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Just curious as to how other plants do their resin separation and split out. At times we have to raise our backwash flowrates to lift the bed to remove all the anion but this cause cation to be removed also.
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I would suggest contacting your resin supplier they should have experts in this field.
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Let gravity do the work for you. We transfer mixed resin to a separation tank ~ 30 feet in height and backwash the bed to expand all the resin. Then you let the beads settle out and they will form layers based on density. Basically you do this three or four times. Cation beads will settle to the bottom, then a small interface layer of mixed cation and anions, and then a top layer of anion. We'll sluice off the three layers to separate tanks regen them (except for the interface layer), and then recombine. That's it in a nutshell and it works great. It all depends on your setup though. If you don't have a separation tank with a enough height to expand the bed enough so it can settle properly then you're looking at a pretty big capital expenditure.
Have you tried contacting other plants through the INPO working groups?
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Are you seeing a lot of broken resin fines accumulating?
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Not too many. Tight control on water temps and chemical concentrations to avoid that.
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Our separation tank is not that big. We have an antiquated Graver system. We are trying to get a Graver rep to come down and help us out. Thanks for the advice though.
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Try GE too, they're the kings in the water treatment field right now. Bought out a lot of the smaller guys.