| 摘要 |
<P>PROBLEM TO BE SOLVED: To further reduce unburned components and CO discharged from a boiler. Ž<P>SOLUTION: In this pulverized coal boiler including a burner jetting pulverized coal to a furnace, and an after-air nozzle disposed downstream of the burner and jetting the combustion air into the furnace, a cross-section of a jetting port of the after-air nozzle has the shape radially extending from the center of the jetting port toward an outer peripheral side. The unburned component and CO discharged from the boiler are further reduced. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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