Loop seal for recycling solids from a cyclone and fluidized bed reactor and method using the same
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United States of America Patent
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Dec 30, 2014
Grant Date -
Jun 7, 2012
app pub date -
Jun 5, 2010
filing date -
Jun 5, 2009
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Abstract
A loop seal for a fluidized bed reactor comprising a vertical downcomer segment connected to a dipleg for receiving solids particles from the dipleg, a horizontal segment downstream of the downcomer, a riser segment downstream of the horizontal segment, and a downwardly inclined segment downstream of the riser, whereby the solids are entrained to the fluidized bed reactor. An eductor is added to the angled leg to induce the underflow gas from the cyclone; one of the preferred motive fluids to the eductor is the fines from fuel preparation and the carrying gas for the fines. Also provided are a fluidized bed reactor comprising the loop seal, and a method for producing syngas from coal and steam using the same.
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