The deaerator is a key equipment to assure the hailer fed water quality in thermal power plant. The deaerators performance influences directly on safe operation and service life of power equipment. The deaerators must be retrofitted

if their deaeration becomes worse. the retrofit variants have an effect on deaeraion results

retrofit cost and recovery time of investment. This paper gives three retrofit variants for spraying and film type deaerator

with their technico- economical comparison

thus provides the way for selection of a optimal retrofit variant.