| 摘要 |
PROBLEM TO BE SOLVED: To provide a boiler system capable of improving stability of an amount of steam to be output while keeping high boiler efficiency.SOLUTION: A boiler system 1 comprises: a boiler group 2 having plural boilers 20; and a control part 4 for controlling a combustion status of the boiler group 2 according to a required load. An economical operation point EP, an economical operation zone Z1 as a range of a load factor including the economical operation point EP, an upper normal operation zone Z2 positioned in a range with a higher load factor than that of the economical operation zone Z1, and a lower normal operation zone Z3 positioned in a range with a lower factor than that of the economical operation zone Z1 are set to the plural boilers 20. The control part 4 sets at least one of the boilers 20 under a combustion status to a load follow-up boiler 20A that is combusted by changing the load factor according to variation of the required load, and sets the boilers other the load follow-up boiler 20A to economical operation boilers 20B that are combusted in the economical operation zone Z1. |
