| 摘要 |
PURPOSE:To further reduce production of NOX without an increase in production of smoke dust in combustion gas, by a method wherein plural burners at each stage are structured so that the amounts of fuel injected on both sides of a fuel injection nozzle are different from each other, but the nozzle may form a fuel injection flow in which its projection injecting direction extends on an appropriately indentical line, and are disposed so that fuel projection injecting direction alternately extends horizontally and/or vertically. CONSTITUTION:The burners at each stage of lower stage burners 30 and middle stage burners 40 form a pair of fuel injection flows extending in the reverse direction to each other within a projection surface centering around a fuel injection nozzle. The flows 14 of the fuel injected through a burner 30B at the lower stage of a second row and through a burner 30E at the lower stage of a fifth row equalize in the amount of fuel injected, and in relation to the burners on stages except the above, the amounts of fuel injected therethrough are different from each other. Meanwhile, all the upper stage burners 50 are structured so that a large amount of fuel is uniformly injected. This prevents production of a unburnt content due to flame interference, suppresses excessive production of the unburnt content at a part, by which radiation cooling is caused, and permits appropriate suppression of production of NOX at a high temperature part. |
