The oxygenated feed-water treatment technology of supercritical unit can effectively decrease the corrosion of water-steam system, and thus the steam-water quality and the operating efficiency are greatly promoted. In view of the mode of feed-water treatment for supercritical unit, the characteristics of oxide film in thermal system under AVT and OT conditions are compared; and then, the principle of oxygenated feed-water treatment technology was elaborated. Besides, the oxygenated conditions, controlling of water quality, advantages, the relation between the formation of oxide scale and oxygen plus are analyzed and discussed. Finally, the paper introduced weak oxiding feed-water treatment technology for supercritical unit, with the principle of low oxygen and high pH value.
