| 摘要 |
In a drain recovery section including a recovery tank to which drain generated in a steam-using device is collected and from which the drain is supplied to a boiler, pressure decrease in the boiler under a high load can be suppressed. A drain recovery section 10 includes: a recovery tank 21 in which drain generated by condensation of steam in a steam-using device 4 is stored and from which water stored in the recovery tank 21 is supplied to a boiler 2; and a control unit 40 that controls an amount of water supply from the recovery tank 21 to the boiler 2 to prevent the water level of water in the recovery tank 21 from decreasing below a predetermined tank reference water level. When the load of the boiler 2 increases to a predetermined load, the control unit 40 reduces the tank reference water level by a predetermined amount. |
