NOx reduction device

Details NOx reduction device NOx reduction device

1994-07-29

1995-12-05

Dority, Carroll B.

Combustion

Fuel disperser installed in furnace

With discrete flame directing baffle

126110R, 431351, F23M 906

Patent

active

054723396

ABSTRACT:
A device for inhibiting NOx production is disposed in a gas furnace combustion chamber. The device includes a baffle member for dividing the combustion chamber into first and second regions. A fuel-rich mixture of gas and primary combustion air is ignited by an inshot burner and the flame is drawn into the combustion chamber by an induced draft blower along with secondary combustion air. The combustion chamber is configured such that in the first region (i.e., upstream of the baffle member) turbulent mixing of the secondary combustion air with the flame is inhibited to maintain a relatively gas-rich flame. The baffle member channels the flame and secondary combustion air into a convergent flow path and the passage of the flame and secondary combustion air over the baffle member creates turbulence, which enhances mixing between the flame and secondary combustion air in the second region of the combustion chamber (i.e., downstream of the baffle member). The turbulent mixing effects substantially complete combustion of the gas/air mixture. Because the turbulent mixing occurs at a location farther along the flame path in the combustion chamber than in conventional gas furnaces, the flame temperature remains relatively low throughout the combustion chamber, thereby inhibiting NOx production.

REFERENCES:
patent: 1654403 (1927-12-01), Blake
patent: 2959215 (1960-11-01), Warnecke
patent: 3185143 (1965-05-01), Wilson
patent: 3938948 (1976-02-01), Moore et al.
patent: 4867673 (1989-09-01), Harrigill
patent: 5083917 (1992-01-01), McCullough et al.
patent: 5236327 (1993-08-01), Flanagan et al.
patent: 5244381 (1993-09-01), Cahlik
patent: 5333597 (1994-08-01), Kirkpatrick et al.
patent: 5370529 (1994-12-01), Lu et al.

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