Patent ID: 9593847
Date: 2017-03-14
CPC Classifications: F23C,F23D

Claim:
1. A burner apparatus for a fired heating system comprising: a longitudinally extending burner wall, said burner wall having a forward end, a longitudinally extending exterior, a longitudinally extending air passageway which extends longitudinally through and is surrounded by said burner wall, and a discharge opening of said longitudinally extending air passageway at said forward end of said burner wall; an exterior notch which is provided in and extends around said longitudinally extending exterior of said burner wall, wherein said exterior notch laterally surrounds said longitudinally extending air passageway, said exterior notch is positioned longitudinally rearward of said forward end of said burner wall, and said exterior notch comprises (i) an interior wall which surrounds said longitudinally extending air passageway and separates said exterior notch from said longitudinally extending air passageway and (ii) an open outer face which surrounds said longitudinally extending air passageway; a plurality of primary air delivery channels, different from said longitudinally extending air passageway, which are formed in said burner wall and extend to said exterior notch, said primary air delivery channels having outlet openings formed in a longitudinally rearward portion of said interior wall of said exterior notch; a plurality of fuel ejection structures positioned outside of said open outer face of said exterior notch, wherein said fuel ejection structures have fuel ejection ports and at least some of said fuel ejection ports are oriented for delivering a gas fuel into said exterior notch through said open outer face thereof for combustion in a primary combustion zone, which is at least partially defined within said exterior notch and is isolated from said longitudinally extending air passageway, to produce a primary combustion product gas; and a plurality of primary combustion product gas discharge channels extending longitudinally in said burner wall for discharging at least a portion of said primary combustion product gas which is produce in said exterior notch, wherein said primary combustion product gas discharge channels are different from and isolated from said longitudinally extending air passageway, said primary combustion product gas discharge channels having inlet openings formed in a longitudinally forward portion of said interior wall of said exterior notch, said primary combustion product gas discharge channels extend to outlet openings which are formed in said forward end of said burner wall, and said outlet opening of said primary combustion product gas discharge channels surround and are spaced radially outward from said discharge opening of said longitudinally extending air passageway so that none of said gas fuel ejected from said fuel ejection structures into said exterior notch and none of said primary combustion product gas produced in said primary combustion zone are permitted to flow into said longitudinally extending air passageway.