FLUIDIZED BED GASIFIER WITH SOLIDS DISCHARGE AND CLASSIFICATION DEVICE
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United States of America Patent
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Issued Date -
Aug 4, 2011
app pub date -
Jun 5, 2009
filing date -
Jun 5, 2008
priority date (Note) -
Abandoned
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Abstract
An apparatus for withdrawing solids from a fluidized bed reactor comprises a venturi tube connected to the stem end of a funnel-shaped distribution plate, and a center jet pipe enclosed within the venturi, wherein a jet stream of feed gas is delivered above the venturi throat. Preferably, the distribution plate is equipped with multiple horizontally- or downwardly-oriented grid holes through which the feed gases flow and enter the fluidized bed, which holes may be covered by metal plates to prevent solids from weeping through grid holes and falling into the plenum below the distribution plate. The venturi is preferably engineered to be readily removable from the rest of the gasifier reactor for repair or replacement. Also provided is a fluidized bed reactor comprising the above apparatus.
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