Furnaces – With exhaust gas treatment means – Recirculation means
Patent
1987-04-16
1990-02-27
Yuen, Henry C.
Furnaces
With exhaust gas treatment means
Recirculation means
110205, 110206, 237 55, F23G 502
Patent
active
049036157
ABSTRACT:
An improved burner head for a forced air furnace is disclosed which includes a burner tube fitted with gas nozzles, air flow openings, and a flame tube. At least one radial opening is provided between the end of the burner tube and an end of the flame to allow exhaust gas recirculation via a ribbed ring secured between the burner tube and the flame tube upstream of the radial opening but downstream of the gas nozzles and airflow openings. The ribbed ring includes ribs protruding radially inward crosswise to the longitudinal axis of the burner head. The burner head allows for a substantial reduction in NOx, to a level on the order of less than 50 ppm.
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patent: 4355601 (1982-10-01), Hattiangadi
Greigg Edwin E.
Yuen Henry C.
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