Fouling

Troubleshooting An IX Mixed-bed Unit: What Are The Resin Problems?

By Donald Downey

BACTERIA FOULING ION EXCHANGE MIXED BED POWER REGENERATION RESISTIVITY TROUBLESHOOTING

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Abstract

In a 2013 article originally presented at the 2013 Electric Utilities Chemistry Workshop, the author talks about experience with troubleshooting and repairing various mixed-bed ion-exchange systems in North America. The article reviewed problems with improper backwashing or air mixing, mechanical failure inside the vessels, and changes in feedwater quality. In this follow-on article, we will cover resin parameters, choosing the best resins for the application, the importance of chemical dosages, and what to look for in the resin reports. Topics will include bacteria, fouling, ion-exchange resin regeneration, and resistivity. This report will discuss some of the authorï¾’s more than 40 years of experience with troubleshooting and repairing various mixed-bed systems in North America.

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