System for recovering carbon dioxide from flue gas
View Patent ↗To include an absorber ( 1006 ) that brings CO 2 absorbent that absorbs CO 2 contained in flue gas ( 1002 ) into contact with the flue gas to remove CO 2 from the flue gas, a regenerator ( 1008 ) that strips CO 2 from CO 2 absorbent (rich solution), which is fed from the absorber through a first feed line L 1 and has absorbed CO 2 , to regenerate CO 2 absorbent, thereby acquiring regenerated CO 2 absorbent (lean solution) ( 1009 ), falling film reboilers ( 1101 - 1 and 1101 - 2 ) that draw off CO 2 absorbent (amine solution) ( 1033 ) from near the bottom of the regenerator and reheats regenerated CO 2 absorbent via steam ( 1031 ), a first liquid-vapor separator ( 1103 ) that separates the CO 2 absorbent reheated by the falling film reboilers into regenerated CO 2 absorbent in which CO 2 has been removed and vapor containing CO 2 , and a second feed line L 2 for supplying the separated regenerated CO 2 absorbent to the absorber.
1. A system for recovering carbon dioxide from flue gas, comprising:
an absorber that brings CO 2 absorbent that absorbs CO 2 contained in flue gas exhausted from industrial facilities into contact with the flue gas to remove CO 2 from the flue gas;
a regenerator that strips CO 2 from CO 2 absorbent that is fed from the absorber through a first feed line and has absorbed the CO 2 to regenerate CO 2 absorbent;
at least two falling film reboilers that draw off CO 2 absorbent from near a bottom of the regenerator and reheats CO 2 absorbent via steam;
a first liquid-vapor separator that separates CO 2 absorbent reheated by the falling film reboilers into CO 2 absorbent and vapor containing CO 2 ; and
a second feed line for supplying separated CO 2 absorbent to the absorber.
2. The system for recovering carbon dioxide from flue gas according to claim 1 , further comprising:
a condenser that condenses water vapor from CO 2 gas carrying water vapor, extracted from a top part of the regenerator;
a second liquid-vapor separator that separates condensed water vapor; and
a CO 2 compressor that compresses CO 2 gas separated by the second liquid-vapor separator to acquire high-pressure CO 2 gas.
3. The system for recovering carbon dioxide from flue gas according to claim 1 , wherein the falling film reboiler includes a channel cover for maintenance provided on the top thereof.
4. The system for recovering carbon dioxide from flue gas according to claim 1 , wherein a reboiler system is constituted by the at least two falling film reboilers and one first liquid-vapor separator that separates falling liquid from the falling film reboilers into vapor and liquid, and a plurality of the reboiler systems are arranged for one regenerator.