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De-ionising Water Unit Operations

I want to enquire about a problem we are facing in the Powder Coating plant. The De-ionising Water Unit which is used to regenerate de-ionising water is not functioning. The Problem we have is that it is not sucking chemicals both ways from the Cation and Anion tanks. I want to know the probable causes so that I can try to rectify the problem.

Mobius Shumba
Quality Assurance Officer - Harare, Zimbabwe
2007

It sounds like your DI system uses eductors to draw in acid and caustic. Problems with eductors are usually related to either inadequate feed pressure, or more often, a high back-pressure due to fouling in the ion exchange resin tanks.

Lyle Kirman
consultant - Cleveland Heights, Ohio
2007

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