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April 2011

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Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Brian Ellis <[log in to unmask]>
Date:
Thu, 28 Apr 2011 15:42:00 +0300
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Morning? Have done a day's work already! DI works best at cold. The 
normal resins are recommended at <50°C but are ok up to ~75°C, but less 
efficient. Hot-water resins just have a different plastic matrix which I 
surmise cannot be as good as 'normal' resins, otherwise there would be 
no raison d'être for the latter. Many have a heat exchanger, so that the 
hot water from the tank reheats the cooler water having passed through 
the resin columns, thus saving energy.

Brian

On 28/04/2011 15:28, Steve Gregory wrote:
> Morning all,
>
>
>
> I have a question about the resin beads inside a mixed bed deionizing tank.
> I know they're called cation and anion resin beads, but I don't know much
> about the physical properties of them.
>
>
>
> We have a carbon bed tank and a hot mixed bed tank to deionize the water for
> our inline cleaner. I run the wash tank at 130 F., but I know the water will
> cool a little before it gets to the mixed bed. We were asked when we first
> had the DI system installed what temperature we would be running our wash
> at, and we told them 130 F., they said that we would need a hot mixed bed.
>
>
>
> Okay, so we need a hot mixed bed, but what is the real difference in the
> resin beads between a standard mixed bed and a "hot" mixed bed?
>
>
>
> What happens when you run 130 F. water through a mixed bed that doesn't have
> "hot" resin beads? Do they swell up, or break down? Or is it that just the
> quality of the DI water will be affected?
>
>
>
> Steve
>
>
>
>
>
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