| 主权项 |
1. A boiler system comprising a boiler group including a step value control boiler configured to combust at a plurality of stepwise combustion points, and a proportional control boiler configured to combust at a continuously changed combustion rate, and a controller configured to control a combustion state of the boiler group in accordance with a required load, wherein
the controller includes an output controller configured to control the combustion state of the boiler group to cause the proportional control boiler to output steam equivalent to a required steam flow according to the required load, and an output switcher configured to switch, under a condition that a steam flow outputted from the proportional control boiler reaches a predetermined steam flow exceeding a steam flow at a possible combustion point of the step value control boiler, output of the steam flow at the combustion point from the proportional control boiler to the step value control boiler. |
