Monitoring method for boiler and monitoring device for boiler, controlling method for boiler and controlling device for boiler, adjustment method for fuel or like and adjustment device for fuel or like, and boiler

Abstract

There is provided a method of monitoring an operation state of a boiler 1, the method including an exhaust gas collection process S1 of collecting an exhaust gas generated by combustion of a fuel input into a combustion furnace 2 of the boiler 1 and an estimation process S2 of estimating a content of an alkaline metal and / or chlorine in the fuel based on a content of a fine salt particle in the exhaust gas collected in the exhaust gas collection process S1.