Re: Dealkalizer

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Posted by Vern on May 15, 2001 at 18:59:55:

In Reply to: Re: Dealkalizer posted by boiler bob on May 15, 2001 at 03:42:31:

: : : : : Need some help with a new dealkalizer unit. What kind of p-m/alkalinity numbers should i be getting?

: : : : I have never operated a dealkalizer, but I would assume you are looking
: : : : to get zero alkalinity out of the unit, and then blend that water with
: : : : raw water to get your desired alkalinity numbers. Those desired alkalinity
: : : : numbers will be chosen based on the process you are using the water for, in this
: : : : case apparently a boiler. Vern
: : : Yes, but the problem i have is really high chlorides and i'll get readings of say 8/p-alk and 8/m-alk and then the chlorides of 2000 or
: : : higher. Shouldn't i be getting p-m/alk that are different like 20p and 45m with maybe lower chlorides? thanks.

: : Bob, is this an ion exchange unit regenerated by salt? With a 2000 chloride level after regeneration,
: : sounds to me like you aren't getting a good flush at the end of the cycle. I'm not certain what p and m alk readings
: : you should be getting, but with ion exchange you should get close to zero until the resin bed becomes exhausted. I know
: : a guy here in Fresno who works on these, I'll see if I can contact him and get some better info. Vern
: Thank you, Thank you, Thank you. Bob

Bob, the guy I talked to said you should get a 70 to 80% reduction in alkalinity
from the incoming water to your effluent. So if you have a 100 m alkalinity, your
effluent should be 20 to 30 m alkalinity. As for the chlorides, he didn't have a
real good answer. He said possibly you weren't getting a good flush at the end of the
cycle, but that wasn't necessarily so. The dealkalizer operates by exchanging chloride ions
for another ion in the water, so you apparently are adding chlorides to the effluent
water. I'll do some more research on this, it all doesn't make sense
yet. Vern

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