Patent ID: 8371125
Filing Date: 2013-02-12
Classification: F23D,F23R

Abstract:
1. A retrofit method for a combustor including a combustor liner which forms a chamber adapted to burn fuel and air, a diffusion combustion type pilot burner disposed on a combustion gas flow directional upstream side of the combustor liner, and an annular premix burner disposed on an outer circumferential side of the pilot burner, the retrofit method comprising; replacing the diffusion combustion type pilot burner with a pilot burner including an air hole member provided with a plurality of air holes each having a central axis inclined relative to a burner central axis, and fuel nozzles each adapted to jet out fuel to a corresponding one of the air holes from a fuel flow directional upstream side of the air hole member, an inlet center of the air hole being disposed on a central axis of each of the fuel nozzles, wherein a leading end portion of a first fuel nozzle is formed to be able to suppress turbulence of air-flow flowing on an outer circumferential side of the first fuel nozzle, a tip of the first fuel nozzle being disposed on a downstream side of an inlet of the air hole with an angle of traverse; and a tip of a second fuel nozzle is disposed on an upstream side of an inlet of the air hole.