System and method for recovering carbon dioxide from flue gas

Details System and method for recovering carbon dioxide from flue gas System and method for recovering carbon dioxide from flue gas

C - Chemistry, Metallurgy

01

B

C01B 31/02 (2006.01) B01D 53/14 (2006.01)

Patent

CA 2735621

[Problem] To provide a system for recovering carbon dioxide from flue gas, in which a reboiler in a regenerator can be compactly installed, and a method therefor, in facilities where CO2 or the like contained in flue gas is recovered. [Solving Means] To include an absorber 1006 that absorbs CO2 contained in flue gas 1002, a regenerator 1008 that strips CO2 from CO2 absorbent (rich solution) 1007 to regenerate absorbent, internal shells 101 provided at a bottom of the regenerator 1008 with a predetermined interval therebetween, into which regenerated CO2 absorbent is introduced by a feeding unit 102 from a bottom side thereof so that the CO2 absorbent overflows from an upper end of the internal shell thereof toward the bottom of the regenerator, and a reboiler that is inserted into the internal shells 101 in a direction orthogonal to a vertical axis and includes a heat-transfer tube 103 that reboils absorbent. Steam separated from CO2 absorbent reboiled by the heat-transfer tube 103 is transferred to an upper part of a regenerator, condensed absorbent is caused to overflow from an upper end of the internal shell and to be discharged from a bottom side of a regenerator, and the absorbent is fed to the absorber 1006 as regenerated CO2 absorbent (lean solution) 1009.

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