Use
Acetone oxime has a strong reduction, it is easy to react with oxygen in water to reduce the dissolved oxygen content in water, reaction is as follows:
2C3H7NO + O2 → 2C3H6CO + N2O + H2O and 4 (CH3) 2C = N-OH + O2 → 4 (CH3) 2C = O + 2N2 + H2O
Meanwhile, Acetoxime also reacts with the metal for passivation, reaction is as follows:
2C3H7NO + 6Fe2O3 → 2C3H6CO + N2O + 4Fe3O4 + H2O
Acetoxime can reduce the content of iron in the feed water, to prevent overheating of the metal pipe and corrosion damage of the boiler due to the formation of iron oxide deposits, while with the cleaning effect for copper corrosion products deposited on pipes, economizer, etc. This is the reason that in the early use of acetone oxime, the content of copper in boiler water will be significantly higher.
Decomposition products of Acetoxime are mainly nitrogen and water, a small amount of formic acid, acetic acid, nitrogen oxides and so on. On the premise of ensuring oxygen removal effect, when the residual amount of DMKO in feed water is controlled to be 5~40μg/L, the formic acid, acetic acid, Cl-, SO42 + was not detected in all tested samples of water vapor, at the same time NO2-and NO3-content of same samples were tested, are also not detected. Therefore, there is no any adverse effects for the use of acetone oxime oxygen in vapor system.