| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a boiler device and its operation method capable of achieving effect of reducing CO concentration and NOx concentration without impairing combustion performance of solid fuel such as coal in a furnace. <P>SOLUTION: This boiler device is composed of a burner 6 of one or more stage for reducing combustion, an after air port 7 of one or more stage jetting the combustion air short in the burner 6, and a mixing promoting port 8 for supplying a part of boiler exhaust gas discharged from the boiler, between the burner 6 and the after air port 7. The burners 6, the after air ports 7 and the mixing promoting ports 8 are respectively disposed on a pair of opposite wall surfaces of the furnace, the mixing promoting ports 8 of each stage are respectively disposed at opposite positions on the same horizontal faces of the opposite furnace wall surfaces, or positions shifted from the opposite positions, and when the mixing promoting ports 8 are disposed in plural stages, the mixing promoting port 8 of each stage is disposed on an intermediate position of the mixing promoting port 8 of the adjacent stage. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
