Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Reexamination Certificate
2007-04-19
2009-11-10
Gravini, Stephen M. (Department: 3743)
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
C034S124000, C034S138000, C162S358100, C165S083000
Reexamination Certificate
active
07614161
ABSTRACT:
A dryer uses conduits to carry a heating medium, such as steam, to heat the outer surface of the dryer. The volume of steam is successfully reduced to non-explosive levels and the shell need not be designed to prevent an explosion. Conduits may be formed through the shell itself or grooves may be formed on the inner surface of the shell, with the conduits retained within the grooves. Also, the conduits can be placed against the inside surface of the dryer and a material, such as zinc, can be filled in about the conduits. The material serves to both retain the conduits in place and thermally couple the conduits to the dryer to assure efficient heat transfer between the conduits and dryer. These modifications relieve the dryer from the Unfired Pressure Vessel classification to the classification of a piping assembly under ASA code regulations. This results in savings in operation safety, installation cost and operating costs due to the absence of costly inspections.
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Haurie Osvaldo Ricardo
Haurie Richard Kenneth
Gravini Stephen M.
Hoffman Wasson & Gitler
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