OPERATION METHOD OF BOILER SUPERHEATER IN WASTE TREATMENT FACILITY, AND BOILER SUPERHEATER OF WASTE TREATMENT FACILITY

摘要

PPROBLEM TO BE SOLVED: To elongate a service life of a boiler superheater by equalizing reduction in thickness caused by high-temperature corrosion of the boiler superheater in a boiler of a waste treatment facility. PSOLUTION: In the boiler superheater 2 comprising a low-temperature portion side to which steam is supplied and a high-temperature portion side which heats the steam supplied to the low-temperature portion side and from which the superheated steam is taken out, a steam supply pipe 3 and a superheated steam taking-out pipe 5 switch the high-temperature portion side from which the superheated steam is taken out to the low-temperature portion side to which the steam is supplied, and switch the low-temperature side to which the steam is supplied to the high-temperature portion side from which the superheated steam is taken out, by two bypass pipes composed of a steam supplying switching pipe 8 for switching the high-temperature portion side from which the superheated steam is taken out to the low-temperature portion side to which the steam is supplied, and a superheated steam taking-out supplying pipe 9 for switching the low-temperature side to which the steam is supplied to the high-temperature portion side from which the superheated steam is taken out, at a time point when the boiler superheater 2 is used for a specific period, and the reduction of thickness at the high-temperature portion side reaches design limit. PCOPYRIGHT: (C)2008,JPO&INPIT