Combustion – Combustion products return structure – Recirculation about mixing or combustion chamber wall or baffle
Patent
1990-08-24
1992-10-13
Price, Carl D.
Combustion
Combustion products return structure
Recirculation about mixing or combustion chamber wall or baffle
431168, 431350, 431354, 431208, 431243, F23J 502
Patent
active
051545977
ABSTRACT:
A gasifier (17) is located at a distance (49) from an air aperture plate (35). At the outlet (42) of the gasifier there is a stationary mixing head (29) having a deflector section (31) and lateral outlets (33). Fuel is supplied coaxially through an opening (55) of the air aperture plate. A flame tube (21) surrounds the gasifier (17) and an electric heater (39) leaving an annular space (40). When the burner is started up, the electric heater (39) is switched on until the gasifier has the necessary operating temperature. Fuel is then supplied. The fuel/air mixture is ignited by an electrode (65). The flame tube (21) extends to the end of the mixing head (29), or only a little therebeyond. A flame is formed at the outlets (33) that touches the flame tube after a short travel, then emerges from it and expands. Because the flame can immediately expand, only little NO.sub.x is formed. A portion of the hot combustion gases is recirculated through the annular space (40) and sucked into the gasifier to heat the gasifier (17) after the shutoff of the electric heater (39).
REFERENCES:
patent: 1755846 (1930-04-01), Steed
patent: 2568763 (1951-09-01), Ray
patent: 2867270 (1959-01-01), Brzozowski
patent: 4624631 (1986-11-01), Kobayashi et al.
patent: 4712997 (1987-12-01), Fullemann et al.
patent: 4957427 (1990-09-01), Fullemann et al.
patent: 5015173 (1991-05-01), Fullemann et al.
Boner Heinrich
Fullemann Jorg
Price Carl D.
VTH AG Verfahrenstechnik fur Heizung
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