| 摘要 |
PROBLEM TO BE SOLVED: To provide a closed type boiler system capable of suitably controlling a water level even when water is continuously supplied.SOLUTION: There is provided a closed type boiler system 1 including: a boiler 10; a drain tank 20 which collects drain condensed and produced as load equipment 50 uses steam without opening the drain to the atmosphere; a drain supply line L3 which supplies the drain stored in the drain tank 20 as feed water to the boiler 10; and a control part 100 which continuously feeds water to the boiler 10 at a first volumetric flow rate. The boiler system further includes a temperature measurement part 37 which measures the temperature of the feed water upstream from a feed water heater 40, and the control part 100 stops feeding the water to the boiler 10 when the temperature of the feed water measured by the temperature measurement part 37 is a first temperature or lower in the state in which the water is fed at the first volumetric flow rate. |
