Combustion – Fuel disperser installed in furnace – Rotary disperser projects at surrounding flange surface
Patent
1985-04-29
1986-08-05
Green, Randall L.
Combustion
Fuel disperser installed in furnace
Rotary disperser projects at surrounding flange surface
23921425, 239223, 110264, F23D 1104
Patent
active
046040528
ABSTRACT:
A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup. A primary air source directs a high velocity air flow coaxially about the expanded discharge end of the rotating cup for applying a shear force to the CWM in atomizing the fuel mixture for improved combustion. A secondary air source directs secondary air into the combustion chamber adjacent to the outlet of the rotating cup at a desired pitch angle relative to the fuel mixture/steam flow to promote recirculation of hot combustion gases within the ignition zone for increased flame stability.
REFERENCES:
patent: 3862821 (1975-01-01), Vorms et al.
patent: 4457695 (1984-07-01), Kummel
European Patent Application, 0,007,894, published 2/6/80.
Brown Thomas D.
Reehl Douglas P.
Walbert Gary F.
Glenn Hugh W.
Gottlieb Paul A.
Green Randall L.
Hightower Judson R.
The United States of America as represented by the United States
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