COMBUSTION SYSTEM WITH WIDE TURNDOWN COAL BURNER
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United States of America Patent
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Issued Date -
Sep 17, 2020
app pub date -
Mar 13, 2020
filing date -
Mar 14, 2019
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Abstract
A combustion system for a coal fired furnace having a windbox includes a source of a mixture of pulverized coal and air, and a splitter that receives the mixture and splits it into first and second mixed streams. A first nozzle receives the first mixed stream and discharges it into the furnace. A separator receives the second mixed stream and separates it into an air stream and a coal rich stream. An air conduit connected between the separator and the source of the mixture causes at least some of the air stream to be fed back into the mixture. A second nozzle receives the coal rich stream and discharges it into the furnace. A third nozzle receives support air from the windbox and discharges it into the furnace in a combustion supporting relationship with respect to the coal rich stream.
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