DEAERATION METHOD FOR CIRCULATION TYPE HOT WATER FEEDING FACILITY

摘要

PURPOSE:To remove corrosive gas such as oxygen or chlorine melted in hot water and prevent components from being corroded by a method wherein a sub-circulation circuit is arranged in a hot water storing tank, hot water is branch to flow in the sub-circulation circuit and the branch hot water is injected and deaerated in an open type deaeration box. CONSTITUTION:Hot water in a hot water storing tank 15 heated by a heater 16 is partially flowed to a main circulation circuit 17 and partially flowed to a sub- circulation circuit 20. The hot water flowed to the sub-circulation circuit 20 is passed through a feeding pipe 23 and injected by an injection nozzle 24 arranged within the open type deaeration box 21 and then corrosive gas such as oxygen or chlorine melted in the hot water is completely removed. The hot water after deaeration is stored once in the open type deaeration box 21, then fed out through a feeding-out pipe 26 under operation of a forced pump 22 and then returned back into the hot water storing tank 15. A repetition of this action causes the hot water stored in the hot water storing tank 15 to be completely removed and at the same time the hot water circulating in the main circulation circuit 17 is also completely removed and the corrosion of pipings and equipment is prevented.