Continuous or periodic small quantities drum water blow down rids of these precipitates and maintains bfw. It can be caused by factors such as exposure to oxygen, acids, or bases Learn how boiler phosphate treatment works, which phosphate types are used, how to control dosage and phosphate residual, and when treatment should be adjusted for different boiler conditions.
Dosing Presentation 2012 | PPT
When we try intermittent blow down, there is a heavy drain of boiler water & phosphate
We will not be able to make up for the drained phosphate with regular dosage rates of chemicals
Ppchem 76 ppchem hints from the experts the phenomenon of hideout with increasing load and pressure (a decrease in phosphate and an increase in ph) and hideout return. A symptom of such corrosion can be when the residue, caused by oxidisation of the metal pipes, turns tap water brown The document discusses modifications made to the phosphate dosing system of a boiler at rtps unit 5 Due to a blocked dosing header inside the boiler drum, phosphate could not be dosed to maintain.
Acid phosphate corrosion occurs in units experiencing phosphate hideout problems and thus the mechanism is most often active in the high pressure boilers and hp hrsg evaporators operating. Corrosion is the deterioration of a metal surface due to a chemical reaction
