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US 2012/0230875 A1Published application
Carbon dioxide separation and recovery apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsTakashi Ogawa, Manabu Sakurai, Yukio Ohashi, Hideo Kitamura
Life of this patent
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Abstract
After absorbing oxygen together with carbon dioxide in an absorber 103, absorbing liquid 104a is supplied to oxygen collecting units 13 and 14. The oxygen collecting units 13 and 14 include silver to collect the oxygen in the absorbing liquid 104a and eliminate the oxygen from the absorbing liquid 104a. A regenerating unit 15 separates and recovers the oxygen collected in one of the two oxygen collecting units 13 and 14 to regenerate the oxygen collecting unit when the other oxygen collecting unit is supplied with the absorbing liquid 104a. A continuous operation can be achieved by switching and using the two oxygen collecting units 13 and 14.
Claims14
A carbon dioxide separation and recovery apparatus comprising:
- an absorber making absorbing liquid absorb carbon dioxide contained in exhaust combustion gas, and discharging the absorbing liquid containing the carbon dioxide;
- a regenerator supplied with the absorbing liquid discharged from the absorber, eliminating carbon dioxide gas containing steam from the absorbing liquid, and regenerating and discharging the absorbing liquid;
- a regenerated heat exchanger placed between the absorber and the regenerator and using the absorbing liquid discharged from the regenerator and supplied to the absorber as a heat source to heat the absorbing liquid discharged from the absorber and supplied to the regenerator;
- and
- an oxygen eliminating unit eliminating oxygen from the absorbing liquid supplied from the absorber to the regenerator and including,
- a first collecting unit and a second collecting unit collecting the oxygen contained in the absorbing liquid,
- a first flow passage switching unit supplying the absorbing liquid discharged from the absorber to the first collecting unit or the second collecting unit,
- a second flow passage switching unit supplying the absorbing liquid discharged from the first collecting unit or the second collecting unit to the regenerated heat exchanger, and
- a regenerating unit recovering the oxygen collected in the second collecting unit in the case where the first flow passage switching unit supplies the first collecting unit with the absorbing liquid, and recovering the oxygen collected in the first collecting unit in the case where the first flow passage switching unit supplies the second collecting unit with the absorbing liquid.
6 more elements
A carbon dioxide separation and recovery apparatus comprising:
- an absorber making absorbing liquid absorb carbon dioxide contained in exhaust combustion gas, and discharging the absorbing liquid containing the carbon dioxide;
- a regenerator supplied with the absorbing liquid discharged from the absorber, eliminating carbon dioxide gas containing steam from the absorbing liquid, and regenerating and discharging the absorbing liquid;
- a regenerated heat exchanger placed between the absorber and the regenerator and using the absorbing liquid discharged from the regenerator and supplied to the absorber as a heat source to heat the absorbing liquid discharged from the absorber and supplied to the regenerator;
- a reactor placed between the absorber and the regenerated heat exchanger, storing the absorbing liquid supplied from the absorber to the regenerator, and generating a sulfate ion by a reaction of the oxygen contained in the absorbing liquid with a sulfite ion;
- a first eliminating unit eliminating the sulfate ion from the absorbing liquid containing the sulfate ion;
- and
- a second eliminating unit placed between the regenerated heat exchanger and the absorber, and eliminating an organic acid anion from the absorbing liquid discharged from the regenerator and having the sulfate ion eliminated therefrom.
4 more elements
A carbon dioxide separation and recovery apparatus comprising:
- an absorber making absorbing liquid absorb carbon dioxide contained in exhaust combustion gas, and discharging the absorbing liquid containing the carbon dioxide;
- a regenerator supplied with the absorbing liquid discharged from the absorber, eliminating carbon dioxide gas containing steam from the absorbing liquid, and regenerating and discharging the absorbing liquid;
- a regenerated heat exchanger placed between the absorber and the regenerator and using the absorbing liquid discharged from the regenerator and supplied to the absorber as a heat source to heat the absorbing liquid discharged from the absorber and supplied to the regenerator;
- a reactor placed between the absorber and the regenerated heat exchanger, storing the absorbing liquid supplied from the absorber to the regenerator, and generating a sulfate ion by a reaction of the oxygen contained in the absorbing liquid with a sulfite ion;
- a first eliminating unit eliminating the sulfate ion from the absorbing liquid containing the sulfate ion;
- a second eliminating unit placed between the regenerated heat exchanger and the absorber, and eliminating an organic acid anion from the absorbing liquid discharged from the regenerator and having the sulfate ion eliminated therefrom;
- and
- a third eliminating unit including,
- a first collecting unit and a second collecting unit collecting the oxygen contained in the absorbing liquid discharged from the reactor,
- a first flow passage switching unit supplying the first collecting unit or the second collecting unit with the absorbing liquid discharged from the reactor,
- a second flow passage switching unit supplying the regenerated heat exchanger with the absorbing liquid discharged from the first collecting unit or the second collecting unit, and
- a regenerating unit recovering the oxygen collected in the second collecting unit in the case where the first flow passage switching unit supplies the first collecting unit with the absorbing liquid, and recovering the oxygen collected in the first collecting unit in the case where the first flow passage switching unit supplies the second collecting unit with the absorbing liquid.
9 more elements
Dependencies are inferred from the claim text.