Posted by roohollah safary on April 30, 2001 at 22:14:10:
In Reply to: Re: Boiler water posted by MCPODon on February 26, 2001 at 17:10:15:
: : The power plant I am working at has boilers that operate in the 800-900 p.s.i range. About three years ago they started to use caustic to raise alkalinity. It is my understanding from previous boiler experience and from articles that I've read that this is an outdated, obsolete method of ph control. Could someone please give me some information on this subject?
: Caustic soda is also used in Chelant boiler chemistry controls as a "normal" treatment chemical along with trisodium EDTA, disodium phosphate, hydrazine and other chemicals. In US Navy high pressure boilers (although outdated and replaced with chelant controls), caustic soda was used in the coordinated phosphate (ph/phosphate control) treatment system to raise the ph during chemical casualties. Maybe that's where you heard it was "outdated".