Panel-bed method and apparatus for gas and granular material contacting
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United States of America Patent
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Aug 31, 2004
Grant Date -
N/A
app pub date -
Nov 26, 2002
filing date -
Nov 26, 2001
priority date (Note) -
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Abstract
There is provided an improved panel-bed method and apparatus for achieving an intimate contact of a gas and a loose granular solid material (e.g., for filtering dust from the gas). A bed of the material is housed in a tall, narrow panel, across which gas moves in a substantially horizontal direction. Gas-entry portions of the granular bed are supported by louvers that slope inwardly and upwardly from nearby their outer edges. The total area of the gas-entry faces presented by these gas-entry portions is greater than the projected vertical frontal area of the panel. After an interval of the contact, gas-entry faces of the granular material are renewed by causing en masse displacement of the material respecting the supporting louvers, the displacement producing a spill of a surface layer from each gas-entry face. This displacement is preferably accomplished by causing louvers to move sharply upward (e.g., as may be caused by an upward blow of a hammer). The displacement may also be accomplished by subjecting the panel to a reverse surge flow of gas (i.e., a 'puff-back').
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