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Posted by bryce dimmen on March 13, 2002 at 00:57:29:
In Reply to: Re: Condensate Tank question posted by Tony Conner on March 12, 2002 at 04:43:47:
Thanks tony,
This helps but can you give me references? All my old navy books have the makeup water feeding into the condensate tank. Onboard ship our condensate return was 98% here its more like 40%.
I need to add that the system has been piped to feed the makeup to our condensate tank for over 10 years(the length of time I have worked here). When we opened it up last week all we had was some fine debris from the condensate system(I wasnt there, I was told this by my boss). The tank walls looked brand new. If there was corrosion the answer would be simple but I dont think we should change a system that works for the sake of changing it.
: 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.