PROBLEM TO BE SOLVED: To efficiently reduce boiler blockage caused by formation of adhered dust layer at low equipment and operating cost while preventing corrosion of heat transfer tubes caused by melting chloride adhering to superheater heat transfer tubes of the convective heat transfer chamber in a boiler connected the waste incinerator.;SOLUTION: A boiler anticorrosive device comprises: exhaust gas temperature meters 70 and 74 for measuring the exhaust gas temperature at the inlet of a convective heat transfer chamber 40 or a supper heater 44a on the uppermost stream side of the convective heat transfer chamber; and control devices 72 and 76 for controlling at least one control input of the supply amount of waste 8 to a waste incinerator 10, the waste conveyance speed in a combustion chamber 13, the combustion air supply amount, the combustion air temperature, the circulation exhaust gas supply amount for supplying a part of exhaust gas from the incinerator to the combustion chamber, and the cooling water supply quantity to the combustion chamber and the boiler. In the control devices, when the exhaust gas temperature measured value at the inlet of the convective heat transfer chamber or the supper heater on the uppermost stream side of the convective heat transfer chamber measured by the exhaust gas temperature meters are higher than the specified value, the control devices control the control input to set the exhaust gas temperature below the specified value.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
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