The effects of applying feed water oxygenation technology on two ultra supercritical 1 000 MW unit for Beilun Power Plant were summarized.The variation of such indexes as redox potencial
iron content and the hydrogen concentration in steam was analyzed
as well as the situation of oxide skin formed on surface of the tube wall under high temperature after oxygenation.It indicates that
the redox potencial rises with the increasing of the oxygen dissolved during the oxygenation process
while the hydrogen content in steam dramatically reduces.Therefore
during the feed water oxygenation
the redox potencial at the hydrophobic section of the high temperature heater can be used as the basis for oxygen regulation.