| 摘要 |
The purpose of the present invention is to maintain plant thermal efficiency even in the case of higher-temperature combustion exhaust gas in a thermal power plant. A thermal power plant is configured to be provided with a recirculation gas intake (6) disposed in the middle of a flue (3) in order to recirculate part of combustion exhaust gas to a boiler (1), and be provided with an air heater (2) for subjecting a fluid of combustion air flowing through a primary combustion air duct (8) and a secondary combustion air duct (9), a fluid flowing through a recirculation gas supply duct (7) for recirculating the combustion exhaust gas from the recirculation gas intake (6) to the boiler (1), and a fluid of the combustion exhaust gas flowing down through the flue (3), as heat sources, to heat exchange. |
