Re: contamination in condensate return from plant

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Posted by Scott on April 23, 2001 at 14:19:53:

In Reply to: Re: contamination in condensate return from plant posted by Vern on April 22, 2001 at 19:02:05:

: : I work at a semi conductor manufacturer. An unknown source contaminates the
: condensate return. We use D.I. water for feedwater. Normal readings
: are;Alkalinity 300-400;Sulfite 200-400;Phosphate 30-50 ;
: Cond.PH 7.5-8.5;Condensate and F.W. hardness is 0ppm.;Conductivity of Cond.
: and F.W. is 10ppm. When contaminated the Alk. is
: o.k.; Sulf.<120 and increasing chemical amt.
: doesn't help raise it.;Phosphate is<10. We
: triple amt. of chemical to raise it.; Cond.PH 10.5-11.0;Hardness is ok. Condensate Return Conductivity 300-500;Feedwater Conductivity 200-300. Boilers are60000lb.-no superheaters. Output is +- 1000000lbs./day. Any help would be appreciated.

: Scott, I assume the normal readings you cite are for the boiler.
: What are the readings you cite when the condensate is contaminated?
: Are those readings in the boiler or in the condensate? I assume they are
: boiler readings since you say you have to triple chemical levels to get
: an increase in readings. When the condensate is contaminated the ph levels are high and the conductivity levels are high, is this correct?
: What is the boiler pressure you operate at? Have you checked the condensate
: for sulfite and phosphate? Have you checked the different processes
: you do to see if you have an excess of makeup wate which might indicate a
: leak to condensate?
: Vern

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