| 摘要 |
PROBLEM TO BE SOLVED: To provide a boiler system capable of performing back-up at proper timing in the boiler system including a plurality of stage value control boilers.SOLUTION: A boiler system 1 includes: a boiler group 2 including a plurality of boilers 20; and a control unit 4 for controlling a combustion state of the boiler group 2. When back-up by a second boiler is necessary with respect to a combustion instruction to a first boiler, the control unit 4 performs a back-up instruction to the second boiler on condition that a first difference, which is a difference between a necessary steam amount according to a required load and an instruction steam amount, which the boiler group 2 is currently instructed to output, exceeds a second difference, which is a difference between a back-up steam amount and a back-up request amount. |
