Gas burner with radiant retention head

Details Gas burner with radiant retention head Gas burner with radiant retention head

1995-02-21

1996-10-08

Dority, Carroll B.

Combustion

Porous, capillary, particulate or sievelike flame holder,...

Means supplying fuel for passage through the flame holding...

F23D 1412

Patent

active

055624405

ABSTRACT:
An inshot-gas burner for gas burning furnaces and other gas burning appliances has a flame retention head at the outlet formed from porous ceramic foam with a central opening through which a flame may project. A velocity reducing insert is located within the mixing chamber of the burner for reducing the velocity of the mixture received by the head in the area spaced about the central openings so that the head is radiant in operation. The porosity of the foam is in the order of 20 to 60 pores per inch. When radiant, the head permits the burner to operate at higher primary aerations, and provides faster burning velocity and thus lower residence time, and additionally provides a lower maximum temperature and a stable quiet flame. This permits the burner to emit low amounts of nitric oxide and nitrogen dioxide without increasing the amount of carbon monoxide emissions. The head may be formed from other materials and the velocity reduction may be provided by other structures, one of which is a composite head having restrictive discreet porting.

REFERENCES:
patent: 1051367 (1913-01-01), Fisher
patent: 3067811 (1962-12-01), Webster
patent: 4673349 (1987-06-01), Abe et al.
patent: 5186620 (1993-02-01), Hollingshead

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