| US 7,485,274 B2 | ||
| Apparatus and method for CO2 recovery | ||
| Takashi Kamijo, Hiroshima (Japan); Masaki Iijima, Hiroshima (Japan); Tomio Mimura, Osaka (Japan); and Yasuyuki Yagi, Osaka (Japan) | ||
| Assigned to Mitsubishi Heavy Industries, Ltd., Tokyo (Japan) | ||
| Filed on Feb. 23, 2006, as Appl. No. 11/359,523. | ||
| Claims priority of application No. 2005-047857 (JP), filed on Feb. 23, 2005. | ||
| Prior Publication US 2006/0204425 A1, Sep. 14, 2006 | ||
| Int. Cl. B01D 53/62 (2006.01); B01D 53/78 (2006.01) | ||
| U.S. Cl. 423—220 [422/168; 422/187] | 8 Claims |
| 1. A CO2 recovery apparatus comprising:
a CO2 absorption tower for removing CO2 from a waste gas containing CO2 discharged from industrial facilities by contacting the waste gas with a CO2 absorbing solution for absorbing CO2;
a regeneration tower for regenerating a rich solution which is a CO2 absorbing solution and absorbed CO2 into a lean solution which is a CO2 absorbing solution and absorbed no CO2 by removing CO2 from the rich solution, wherein the lean solution obtained by removing CO2 in a regeneration tower is reutilized as a CO2 absorbing solution in an absorption tower; and
a flow path for returning extracted, temperature risen semi-lean solution to the regeneration tower wherein at least a part
of the semi-lean solution obtained by removing a partial CO2 from the rich solution infused in the regeneration tower from an upper part of the regeneration tower is extracted, raised
its temperature by heat exchanging with a high-temperature waste gas in a gas duct of the industrial facility, and then returned
to the regeneration tower.
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