| 摘要 |
PROBLEM TO BE SOLVED: To provide a forced cooling method after boiler extinction in power-generating facilities, which enables the inside of a boiler to be efficiently and forcedly cooled without waste by effectively utilizing water after the boiler extinction.SOLUTION: A first water supply amount is supplied to a first bypass system and retained, while an air quantity smaller than an air quantity of total output is supplied by a draft system. After combustion in a furnace is removed, a second water supply amount set smaller than the first water supply amount is supplied to a second bypass system from the first bypass system to lower a temperature of the furnace, while the air quantity smaller than the air quantity of the total output is maintained by the draft system. |
