Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1994-03-25
1996-06-25
Sollecito, John M.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34125, 165 89, D06F 5800, F26B 1102, F28D 1102, F28F 502
Patent
active
055288383
ABSTRACT:
The invention pertains to apparatus for thermally insulating selected portions of a cylindrical dryer drum, usually adjacent the drum ends, for the purpose of obtaining a substantially uniform drum shell temperature throughout its length to obtain a uniform moisture profile throughout the width of the web being dried. A plurality of cylindrical segments are bolted together within the drum interior to define a circumferential assembly biased against the drum inner surface. The segments each include a thermal insulation material engaging the drum shell preventing direct access of that engaged portion of the shell with the steam within the drum thereby reducing the exterior temperature of the drum shell at the location of the thermally insulated segment. The segments may be bolted together, widthwise, to increase the axial dimension of the temperature controlling segment assembly.
REFERENCES:
patent: 3065552 (1962-11-01), Skinner
patent: 4192080 (1980-03-01), Irpola
patent: 4520578 (1985-06-01), Schiel et al.
patent: 4542593 (1985-09-01), Viitanen et al.
patent: 4639291 (1987-01-01), Ota et al.
patent: 4639292 (1987-01-01), Ota et al.
patent: 4888095 (1989-12-01), Gulya et al.
Peter John H.
Timm Gerald L.
Gravin Steve
Sollecito John M.
The Johnson Corporation
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