Patent ID: 6666029
Filing Date: 2003-12-23
Classification: F02C,F23N,F23R

Abstract:
A pilot burner for a gaseous fuel combustor, the pilot burner comprising:a first gaseous diffusion fuel delivery circuit having a first outlet disposed within a combustor, a flow of gaseous fuel though the first gaseous fuel delivery circuit being responsive to a fuel flow control system; and a second gaseous diffusion fuel delivery circuit having a second outlet disposed within the combustor and having an Inlet connected to the first gaseous diffusion fuel delivery circuit through a pressure-regulated valve, a flow of gaseous fuel through the second gaseous diffusion fuel delivery circuit being responsive to a fuel pressure in the first gaseous diffusion fuel delivery circuit, said pressure-regulated valve being constructed and arranged to permit said flow of gaseous fuel through said second gaseous diffusion fuel delivery circuit while said fuel pressure is above a first predetermined value selected to maintain a differential pressure across said first outlet orifice above a second predetermined value and a differential pressure across said second outlet orifice above a third predetermined value, said second and third predetermined values being selected to maintain stable burning of said diffusion fuel ensured as said fuel pressure varies.