Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1984-08-31
1987-10-27
Bennet, Henry A.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432139, 34178, F27B 900
Patent
active
047026944
ABSTRACT:
A multiple hearth furnace is constructed from a plurality of cylindrical heating chamber modules, connected in a vertical configuration. Each module contains a hollow hearth, which forms a floor in the chamber, the hearth having an open portion approximately centered in the chamber floor. A rotating central shaft is disposed vertically through open portions in the hearths and is provided with projections for distributing material to be heated across the hearths. Heating of the modules is accomplished by passing heated gases through the hollow hearths. Material to be heated is introduced into the uppermost module, is distributed across the hearth, and is discharged into successively lower modules, after which material exits the furnace. Gases which form during the heating can be removed separately from gases used to heat the furnace.
REFERENCES:
patent: 730564 (1903-06-01), Perkins
patent: 1666617 (1928-04-01), Caldwell
patent: 3962128 (1976-06-01), Nelson et al.
patent: 4391208 (1983-07-01), Lewis
Hawryluk Raymond
Johnson Clyde R.
Katrencik Gerald
Bennet Henry A.
Franks Robert A.
Sandford Dean
Union Oil Company of California
Wirzbicki Gregory F.
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