HEAT RECOVERY SYSTEM AND HEAT RECOVERY METHOD OF CO2 RECOVERY UNIT
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United States of America Patent
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Issued Date -
Nov 15, 2012
app pub date -
Jan 11, 2011
filing date -
Feb 8, 2010
priority date (Note) -
Abandoned
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Abstract
A heat recovery system of a CO2 recovery unit (55) including an absorber that removes CO2 in flue gas (101) discharged from a boiler (51) by absorbing CO2 by an absorbent, and a regenerator that emits CO2 from the absorbent having absorbed CO2 for reusing the absorbent in the absorber. The heat recovery system further includes a Ljungström heat exchanger (57) that performs heat exchange between the flue gas (101) discharged from the boiler (51) and before reaching the CO2 recovery unit (55) and unburned air (102) supplied to the boiler (51), and an air preheater (58) that preheats the unburned air (102) before reaching the Ljungström heat exchanger (57) by exhaust heat from the CO2 recovery unit (55).
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