When calibrating a new boiler, lye and soda ash are used – what reactions take place during this process?
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The purpose of boiling the furnace is to remove rust; so what reaction takes place? It would be best to write out the chemical equation!
Boiler treatment involves chemical treatment using sodium hydroxide, trisodium phosphate, or anhydrous sodium carbonate. These alkaline substances cause saponification of the free oils present in the boiler, thereby reducing the binding between these free substances; afterward, the area is rinsed and cleaned using feedwater or deionized water； The shedding of rust from the inner wall of the boiler in alkaline solutions also increases as the temperature and load of the boiler water rise. Most of the shed rust settles in the lower header of the boiler and is removed through bottom blowdown. It’s hard to write chemical reaction equations.
This post was last edited by dongjiang1001 on 2011-8-13 at 15:34. I’ve learned it, thank you; I hope there will be more detailed explanations.