Apparatus for heat treatment using downwardly swirling hot gas f

Details Apparatus for heat treatment using downwardly swirling hot gas f Apparatus for heat treatment using downwardly swirling hot gas f

1976-12-01

1978-08-15

Camby, John J.

Heating

With heating gas conveying, agitating, scattering or...

34 57E, F27B 1500

Patent

active

041068920

ABSTRACT:
Hot gas is introduced into a heat treatment furnace 10 through a plurality of nozzles 11 on the furnace wall to form a conical, downwardly swirling gas flow which is convergent at the top and divergent at the bottom. Such a gas flow pattern both heats the bed below, and acts to contain and oxidize any particles blown or splashed up out of the bed. Exhaust gas is discharged up through the conical apex of the swirling flow. The downward angle .alpha. that each nozzle axis forms with the vertical furnace wall is defined by 0<.alpha..ltoreq.30.degree., and the inclination angle .beta. of each nozzle axis with a horizontal line tangent to the furnace circumference is defined by 45.degree..ltoreq..beta..ltoreq.85.degree..

REFERENCES:
patent: 3494047 (1970-02-01), Geiger et al.
patent: 3600817 (1971-08-01), Klein
patent: 3740865 (1973-06-01), Laguilharre
patent: 4030876 (1977-06-01), Akae et al.

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