NOx depression type burners

Details NOx depression type burners NOx depression type burners

1977-01-25

1978-12-19

Favors, Edward G.

Combustion

Fuel disperser installed in furnace

Plural feed means extending to common wall opening of furnace

F23M 900

Patent

active

041303890

ABSTRACT:
A burner for a furnace comprises a first pipe for delivering fuel to the furnace and a second pipe of larger diameter than the first pipe, positioned parallel with and encompassing the first pipe, which supplies air to the furnace in the annular space between the two pipes. The second pipe includes a large diameter section and a throttle section of gradually decreasing diameter which acts to speed up the air passing therethrough. In the annular space between the large diameter section of the second pipe and the first pipe is positioned a device having guide vanes which gives the air passing therethrough a swirling motion prior to acceleration in the throttle section. The burner further includes an air swirl passage between the throttle section of the second pipe and the furnace which conveys the air into the furnace. The air swirl passage also acts to convey the fuel into the furnace since the first pipe terminates prior to entry into the furnace.

REFERENCES:
patent: 2119952 (1938-06-01), Engels
patent: 2124175 (1938-07-01), Zink
patent: 2325442 (1943-07-01), Vroom
patent: 2439554 (1948-04-01), Anderson
patent: 3905751 (1975-09-01), Hemsath et al.

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