Burner for solid and liquid or gaseous fuel

Details Burner for solid and liquid or gaseous fuel Burner for solid and liquid or gaseous fuel

1991-01-29

1993-04-20

Price, Carl D.

Combustion

Separately supplied or controlled, physically related flame...

Coaxial

431285, 431181, 431187, 431247, 110262, F23D 1700, F23K 502

Patent

active

052036928

ABSTRACT:
A burner (1) for feeding solid and liquid or gaseous fuel into a burning zone (8) of a kiln, for instance a rotary kiln, and comprising central duct (2) for liquid or gaseous fuel, a surrounding annular duct (3) for primary air and a further surrounding annular duct (4) for solid fuel is provided with an outer duct system (5) for feeding yet an amount of primary air into the burning zone (8), the duct system (5) being in the form of a heat exchanger for transferring heat from the inner kiln compartment surrounding the burner (1) to the primary air transported in the duct system (5) and thereby increasing the velocity of the air passing through the system without any corresponding increase of the fan power or the energy consumption of the kiln plant, but with a substantial decrease in the amount of primary air fed to the burning zone. The duct system (5) is separated from the remainder parts of the burner (1) by an insulating layer (7).

REFERENCES:
patent: 2335188 (1943-11-01), Kennedy
patent: 3149613 (1969-09-01), Anshutz et al.
patent: 3260301 (1966-07-01), Zoschak et al.
patent: 4208180 (1980-06-01), Nakayasa et al.

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