| abstract |
【Task】 This invention makes it a subject to suppress that dew point corrosion arises in piping with simple equipment. [Solution] The present invention relates to an oxygen production facility, a coal supply facility, a burner, a boiler equipped with the burner, a flue that leads the combustion exhaust gas of the boiler to the outside, and an exhaust gas treatment facility installed in the middle of the flue And a carbon dioxide separation facility that is installed downstream of the exhaust gas treatment facility and separates carbon dioxide from the exhaust gas, an exhaust gas recirculation system, and an oxygen supply system, and the exhaust gas treatment facility is at least an SO 3 removal device , Having a water removal device, and an exhaust gas inlet of the exhaust gas recirculation system is installed on the downstream side of the exhaust gas treatment facility and on the upstream side of the carbon dioxide separation facility, and is introduced from the exhaust gas inlet The exhaust gas is returned to the coal supply system. 【effect】 ADVANTAGE OF THE INVENTION According to this invention, it can suppress that dew point corrosion arises in piping with simple equipment. [Selection] Figure 1 |