| 摘要 |
PURPOSE:To reduce generation of NOx even at the time of a partial load operation by providing an air regulating valve at a dilute air hole section to adjust the quantity of dilute air in correspondence to the load, maintaining the fuel to primary air flow quantity at a predetermined value, and non-varying the excess air ratio. CONSTITUTION:A scroll 12 is formed by surrounding a dilute air hole 9 on the outer circumference of a combustion apparatus liner, and at least one air adjusting valve 13 which adjusts the flow quantity of dilute air is fitted to the scroll 12. Bellows 15 are connected to the leading end of a valve rod 14 of the air adjusting valve 13, and fixed to a bracket 16 fitted to the scroll 12. That is, the flow quantity of dilute air is adjusted in correspondence to the load, and the fuel to primary air flow quantity ratio is maintained at a predetermined value and the excess air ratio is not varied, whereby the increase in the temperature of the combustion gas is prevented. Accordingly, at the time of partial load operation, the generation of NOx can be maintained at a low level similarly as the rated operation time. |
