| 摘要 |
PROBLEM TO BE SOLVED: To provide a swirl combustion boiler capable of reducing generation of NOx by reducing high-temperature oxygen remaining region formed at an outer periphery of flame. SOLUTION: In this swirl combustion boiler in which a burner 20 for charging powdered coal and the air into a furnace, is composed of swirl combustion type burner sections respectively disposed at each of corner sections of each stage, and one or several swirl flames are formed in each stage, the burner 20 includes a powdered coal burner 21 to which the powdered coal and the air are charged, and secondary air charging ports 30 for charging the secondary air, respectively disposed above and below the powdered coal burner 21, and divided into a plurality of independent flow channels having dampers 40. COPYRIGHT: (C)2010,JPO&INPIT |
