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Posted by Tony Conner on March 12, 2002 at 04:43:47:
In Reply to: Condensate Tank question posted by bryce dimmen on March 11, 2002 at 23:42:59:
By mixing the make-up water with the condensate ahead of the DA, you can minimize the peak steam useage, but I'm not sure you can claim much of a plant efficiency improvement.
If un-deaerated make-up water is fed to a carbon steel tank to be mixed with hot condensate, the resulting oxygen corrosion is just spectacular. I've seen this arrangement where the carbon steel tank has failed in less than 18 months.
Unless you've got a stainless steel condensate tank/pump/piping, send the make-up water directly to the DA.