Carbon dioxide capture system and method of operating carbon dioxide capture system
AssigneesKabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions Corporation
InventorsKoshito Fujita, Hideo Kitamura, Daigo Muraoka, Mitsuru Udatsu, Yusuke Handa, Tetsuya Kaseda, Yasuhiro Kato
Life of this patent
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Abstract
A carbon dioxide capture system according to an embodiment includes a carbon dioxide capturer, a first washer, and a second washer. The first washer includes a spray configured to spray first cleaning liquid supplied under first pressure. The second washer includes a cleaning liquid diffuser configured to diffuse and drop second cleaning liquid supplied under second pressure lower than the first pressure.
Claims6
A carbon dioxide capture system comprising:
- a carbon dioxide capturer configured to cause carbon dioxide contained in combustion exhaust gas to be absorbed by absorbing liquid containing amine to produce a decarbonated combustion exhaust gas;
- a first washer configured to clean the decarbonated combustion exhaust gas discharged from the carbon dioxide capturer by using a first cleaning liquid to capture the amine entrained by the combustion exhaust gas;
- a second washer configured to clean the decarbonated combustion exhaust gas discharged from the first washer by using a second cleaning liquid to capture the amine entrained by the combustion exhaust gas:
- a spray provided to the first washer and configured to spray the first cleaning liquid supplied under first pressure;
- a cleaning liquid diffuser provided to the second washer and configured to diffuse and drop the second cleaning liquid supplied under second pressure lower than the first pressure;
- a receiver provided below the spray of the first washer and configured to receive the first cleaning liquid sprayed by the spray;
- and
- a capture space that is provided between the spray and the receiver and in which the first cleaning liquid sprayed by the spray is subjected to gas-liquid contact with the combustion exhaust gas while freely falling, wherein the first cleaning liquid having passed through the capture space is directly received by the receiver, the capture space extends from the spray to the receiver, and the capture space includes no structure having a surface that the first cleaning liquid flows down.
A method of operating a carbon dioxide capture system, the method comprising:
- causing carbon dioxide contained in combustion exhaust gas to be absorbed by absorbing liquid containing amine in a carbon dioxide capturer to produce a decarbonated combustion exhaust gas;
- cleaning the decarbonated combustion exhaust gas discharged from the carbon dioxide capturer by spraying a first cleaning liquid, with a spray provided to a first washer, supplied under first pressure in the first washer to capture the amine entrained by the combustion exhaust gas;
- and
- cleaning the decarbonated combustion exhaust gas discharged from the first washer by diffusing and dropping a second cleaning liquid, with a cleaning liquid diffuser provided to a second washer, supplied under second pressure lower than the first pressure in the second washer to capture the amine entrained by the combustion exhaust gas,
- wherein a receiver configured to receive the first cleaning liquid sprayed by the spray is provided below the spray of the first washer,
- a capture space in which the first cleaning liquid sprayed by the spray is subjected to gas-liquid contact with the decarbonated combustion exhaust gas while freely falling is provided between the spray and the receiver,
- the first cleaning liquid having passed through the capture space is directly received by the receiver,
- the capture space extends from the spray to the receiver, and
- the capture space includes no structure having a surface that the first cleaning liquid flows down.
Dependencies are inferred from the claim text.