| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a boiler system capable of preventing high temperature water accumulated in a feed-water heater from boiling while a boiler is in combustion operation.SOLUTION: A boiler system comprises: a boiler 2 which has a feed-water heater 3 to heat water supplied to the boiler 2 by exhaust gas; a feed-water line L1 to supply the water to the boiler 2 through the feed-water heater 3; a feed-water flow rate adjustment section 11 which is arranged on the feed-water line L1 at an upstream side of the feed-water heating device 3 and adjusts a flow rate of the water W1 supplied to the feed-water heater 3; a water temperature detection section 12 which is arranged on the feed-water line L1 at a downstream side of the feed-water heater 3 and detects a temperature of the water W1 supplied to the boiler 2 from the feed-water heater 3; and a control section 10 which controls the feed-water flow rate adjustment section 11. The control section 10 controls the feed-water flow rate adjustment section 11 so that the water W1 is supplied to the feed-water heater 3 when water supply is not requested by the boiler 2 and a state, where the temperature of the water W1 detected by the feed-water temperature detection section 12 is equal to or higher than a reference temperature, lasts a preset period or longer.</p> |
