OXYGEN BURNING BOILER SYSTEM, REMODELING METHOD FOR PULVERIZED COAL BURNING BOILER AND DEVICE AND METHOD FOR CONTROLLING OXYGEN BURNING BOILER SYSTEM

摘要

PPROBLEM TO BE SOLVED: To suppress generation of dewpoint corrosion within piping by using a simple facility. PSOLUTION: This oxygen burning boiler system comprises: an oxygen production facility; a coal supply facility; a burner; a boiler provided with the burner; a gas duct for introducing combustion exhaust gas from the boiler to outside; an exhaust gas treatment facility installed in the middle of the gas duct; a carbon dioxide separation facility installed downstream of the exhaust gas treatment facility to separate carbon dioxide from the exhaust gas; an exhaust gas recirculation system; and an oxygen supply system. The exhaust gas treatment facility is provided with at least an SOSB3/SBremoving device and a moisture removing device, and an exhaust gas taking-in port of the exhaust gas recirculation system is disposed downstream of the exhaust gas treatment facility and upstream of the carbon dioxide separation facility. Exhaust gas taken in from the exhaust gas taking-in port is returned to the coal supply system. PCOPYRIGHT: (C)2010,JPO&INPIT