Drying and gas or vapor contact with solids – Process – Diverse types of drying operations
Patent
1998-07-01
2000-10-24
Gravini, Stephen
Drying and gas or vapor contact with solids
Process
Diverse types of drying operations
34444, 34486, 34488, F26B 700
Patent
active
061348090
ABSTRACT:
A process and an apparatus for removing water from a fibrous web are disclosed. The process comprises providing a fibrous web having a moisture content from about 10% to about 90%; providing an oscillatory flow-reversing impingement gas having frequency of from 15 Hz to 1500 Hz; providing a gas-distributing system comprising a plurality of discharge outlets designed to emit the oscillatory flow-reversing impingement gas onto the web; and impinging the oscillatory flow-reversing gas onto the web through the plurality of discharge outlets, thereby removing moisture from the web. The apparatus comprises a web support designed to receive a fibrous web thereon and to carry it in a machine direction; at least one pulse generator designed to produce oscillatory flow-reversing air or gas; and at least one gas-distributing system in fluid communication with the pulse generator for delivering the oscillatory flow-reversing air or gas to the web. The gas-distributing system terminates with a plurality of discharge outlets juxtaposed with the web support such that the web support and the discharge outlets form an impingement distance therebetween, the plurality of the discharge outlets comprising a predetermined pattern defining an impingement area of the web.
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Gravini Stephen
Hasse Donald E.
Huston Larry L.
The Procter & Gamble & Company
Vitenberg Vladimir
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