removal from flue gas
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United States of America Patent
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Sep 17, 2013
Grant Date -
May 23, 2013
app pub date -
Nov 6, 2012
filing date -
Nov 7, 2011
priority date (Note) -
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Abstract
The present invention relates to a method for combined SO2 and CO2 removal from flue gas, which includes removing both CO2 and SO2 in a primary fractionation column and two polishing columns, the method comprising: a) hot flue as pretreatment, including flue gas SO3 removal by dry sorbent injection; b) compressing the treated hot flue gas by a multi-stage compressor; c) separation of CO2, SO2 and non-condensable gases; d) subjecting the CO2 and SO2 to separate polishing columns; and e) combining streams from the primary fractionation column and the two polishing columns for power recovery.
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