Oxy-fuel burner arrangement

An oxy-fuel burner arrangement comprising:

• a first conduit having a nozzle aperture with an aspect ratio, D1/D2,of greater than or equal to about 2, the first conduit being arranged and disposed to provide a first fluid stream, the first fluid stream being a combustible fuel;
• at least one second conduit arranged and disposed to provide a second gas stream circumferentially around the first fluid stream, the second gas stream being oxygen;
• and
• a precombustor arranged and disposed to receive the first fluid stream and second gas stream where an oxy-fuel flame is produced, the precombustor having a length to diameter ratio greater than or equal to about 2.0 and less than about 6.0;
• wherein the geometry of the nozzle aperture and the cross-sectional geometry of the first conduit are dissimilar;
• and
• wherein the precombustor has an inlet section having a constant diameter cylindrical geometry and an outlet section having an oval cross-sectional geometry oriented horizontally.

An oxy-fuel burner arrangement comprising:

• a first conduit having a nozzle aperture with an aspect ratio, D1/D2, of greater than or equal to about 2, the first conduit being arranged and disposed to provide a first fluid stream, the first fluid stream being a combustible fuel;
• at least one second conduit arranged and disposed to provide a second gas stream circumferentially around the first fluid stream, the second gas stream being oxygen;
• and
• a precombustor arranged and disposed to receive the first fluid stream and second gas stream where an oxy-fuel flame is produced, the precombustor having a length to diameter ratio greater than or equal to about 2.0 and less than about 6.0;
• wherein the geometry of the nozzle aperture and the cross-sectional geometry of the first conduit are dissimilar;
• and
• wherein the precombustor has a cross-sectional geometry including an aspect ratio, D1′/D2′, of greater than 2.0.

A method for producing a flat oxy-fuel flame comprising:

• providing an oxy-fuel burner arrangement comprising a first conduit, at least one second conduit, and a precombustor;
• flowing a first fluid stream in the first conduit and through a nozzle aperture with an aspect ratio, D1/D2, of greater than or equal to about 2.0, the first fluid stream being a combustible fuel;
• and
• flowing a second gas stream circumferentially around the first fluid stream in the at least one second conduit, the second gas stream being oxygen;
• forming an oxy-fuel flame in a precombustor with the first and second gas streams, the precombustor having a length to diameter ratio greater than or equal to about 2.0 and less than about 6.0;
• wherein the geometry of the nozzle aperture and the cross-sectional geometry of the first conduit are dissimilar.