Breech lock heat shield face for burner nozzle

Claim 1

A heat shielded burner nozzle assembly for injecting a fluidized fuel and oxidizing material into a high temperature combustion chamber, said assembly comprising: a) a burner nozzle comprising an elongated outer shell having a longitudinal nozzle discharge axis and a plurality of elongated circumferentially reduced inner shells, said shells defining at least two annular channels surrounding a central channel and having upstream and downstream ends defining upstream and downstream orifices transected by said longitudinal axis, said downstream ends of said shells forming a burner head face having a first outer perimeter, said downstream end of said outer shell and said first outer perimeter of said burner head face defining a nozzle lip having a first thickness as measured along said longitudinal axis, and a outer surface, said nozzle lip having a first plurality of projections radially extending from said outer surface of said nozzle lip; b) a coolant jacket defined by an annular end-face radially extending from said nozzle lip to a longitudinally extending cylindrical outer wall, said annular end-face having a second plurality of projections radially extending therefrom and defining a projection perimeter, wherein said coolant jacket envelopes said outer shell; and c) a heat shield ring assembly including an inner heat shield ring having a second thickness, a first inner face adapted to reside adjacent to said annular end-face and a first exterior face distal to said first inner face, a first inner perimeter adapted to reside adjacent to said nozzle lip and a first outer perimeter, said first inner perimeter defining an opening sufficient to receive said nozzle lip when said first inner face is positioned adjacent to said annular end-face, said inner heat shield ring having a first channel residing between said first inner face and said first exterior face, said first channel defining a first plurality of "L-shaped" openings correspondingly positioned relative to said first plurality of projections, each "L-shaped" opening extending from said first inner face across said first inner perimeter, wherein said first channel is sufficiently dimensioned for receiving said first plurality of projections when said first inner face is positioned adjacent to said annular end-face, whereby transaxial rotation of said inner heat shield ring about said nozzle lip causes said first plurality of protrusions to be received within said first channel to moveably affix said inner heat shield ring to said nozzle lip, and an outer heat shield ring having a third thickness, a second inner face adapted to reside adjacent to said annular end-face, and a second exterior face distal to said second inner face, said outer heat shield ring having a second inner perimeter defining an opening sufficient to receive said nozzle lip and a second outer perimeter radially located at least as far as said protrusion perimeter, wherein a portion of said inner heat shield ring longitudinally overlaps a portion of said outer heat shield ring, said outer heat shield ring including a cylindrical cuff bracket longitudinally extending from said second outer perimeter of said outer heat shield ring to beyond said second plurality of projections, said cuff bracket being adapted to radially surround said annular end-face, said cuff bracket having a fourth thickness, a third inner perimeter, a third outer perimeter, and an upper face extending between said third inner and outer perimeters, said third inner perimeter longitudinally extending from said second inner face of said outer heat shield ring between said second inner and outer perimeters thereof and being adapted to reside radially adjacent to said annular end-face, said third inner perimeter defining an opening sufficient to receive said annular end-face when said second inner face of said outer heat shield ring is positioned adjacent to said annular end-face, said cuff having a second channel residing between said upper face of said cuff bracket and said second inner face of said outer heat shield ring, said second channel defining a second plurality of "L-shaped" openings correspondingly positioned relative to said second plurality of projections, each second "L-shaped" opening extending from said upper face across said third inner perimeter, wherein said second channel is sufficiently dimensioned for receiving said second plurality of projections when said second inner face of said outer heat shield ring is positioned adjacent to said annular end-face, whereby transaxial rotation of said outer heat shield ring about said annular end-face and said nozzle lip causes said second plurality of projections to be received within said second channel to moveably affix said outer heat shield ring to said annular end-face.