Low NO.sub.x burner assemblies

Details Low NO.sub.x burner assemblies Low NO.sub.x burner assemblies

1991-05-01

1991-12-17

Dority, Carroll B.

Combustion

Combustion products return structure

Recirculation about mixing or combustion chamber wall or baffle

F23L 700

Patent

active

050731050

ABSTRACT:
A burner assembly for process heaters or the like comprising a burner block, primary gas jets, secondary gas jets, a flame holder, and an air register for installation in a furnace wall or furnace floor is described. The burners are characterized in that primary fuel is introduced into the primary combustion zone of the burner at an angle horizontal to the flame holder whereby the fuel induces furnace gases from the furnace into the primary combustion zone. Similarly, the secondary fuel jets introduce a secondary fuel through the burner block for consumption in a combustion zone at the surface of the burner block. The secondary fuel also draws furnace gases into the combustion zone for consumption. The design provides for intense mixing of combustion air with the fuel and furnace gases, resulting in low NO.sub.x levels.

REFERENCES:
patent: 2174663 (1939-10-01), Keller
patent: 2918117 (1959-12-01), Griffin
patent: 4277942 (1981-07-01), Egnell et al.
patent: 4483832 (1984-11-01), Schirmer

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