| 摘要 |
PURPOSE:To suppress CH and HC from generating in the operating range of a gas turbine by controlling premixture air flow rate supplied from second stage by the flow rate of the second stage supply fuel flow rate slways to become slightly excessive air flow rate, thereby reducing NOx in the exhaust gas. CONSTITUTION:The secondary air turning supplying hole 27 for branching and supplying air from a compressor to a main combustor are provided in two systems. A valve 30 for regulating the flow rate of air 29 so as to become the flow rate of slightly excess air always to the fuel 28 supplied to the main combustion chamber 12 from the second stage is provided. The air regulated in the flow rate is collected to an air reservoir 31, and supplied from the hole 27 to the chamber 12, fuel 32 is supplied into the turning air flow, and introduced as a premixture fuel with the secondary air 29 is regulated by a flow rate control valve 30 at the flow rate with the secondary fuel 32 so that the excess air ratio (lambda) becomes 1.2-1.8 as the slightly air excess. |
