US 11,833,467 B2
Boiler plant and carbon dioxide removal method
Atsushi Tsutsumi, Yokohama (JP); Hiromi Ishii, Yokohama (JP); Tetsuya Tanaka, Yokohama (JP); Naoyuki Nagafuchi, Yokohama (JP); and Takashi Kamijo, Yokohama (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP); and MITSUBISHI HEAVY INDUSTRIES ENGINEERING, LTD., Kanagawa (JP)
Appl. No. 17/779,430
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP); and Mitsubishi Heavy Industries Engineering, Ltd., Kanagawa (JP)
PCT Filed Dec. 7, 2020, PCT No. PCT/JP2020/045388
§ 371(c)(1), (2) Date May 24, 2022,
PCT Pub. No. WO2021/131629, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-238846 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0410062 A1, Dec. 29, 2022
Int. Cl. B01D 53/14 (2006.01); B01D 53/18 (2006.01); F01K 11/02 (2006.01); F23J 15/04 (2006.01); F24H 1/00 (2022.01)
CPC B01D 53/1425 (2013.01) [B01D 53/1412 (2013.01); B01D 53/1475 (2013.01); B01D 53/18 (2013.01); F01K 11/02 (2013.01); F23J 15/04 (2013.01); B01D 2252/20478 (2013.01); F23J 2215/50 (2013.01); F24H 1/0018 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A boiler plant comprising:
a boiler configured to generate steam with heat of a combustion gas generated through combustion of a fossil fuel; and
a carbon dioxide capture system configured to remove carbon dioxide contained in an exhaust gas exhausted from the boiler,
wherein the carbon dioxide capture system includes:
an absorbing-liquid regeneration device configured to separate the carbon dioxide from an absorbing liquid that has absorbed the carbon dioxide, and
an absorber configured to allow the exhaust gas from the boiler to flow thereinto, absorb the carbon dioxide in the exhaust gas in the absorbing liquid from the absorbing-liquid regeneration device, and discharge the exhaust gas from which the carbon dioxide has been removed, and
wherein the absorbing-liquid regeneration device includes:
a regenerator configured to allow the absorbing liquid, which has absorbed the carbon dioxide in the absorber, to flow thereinto, separate the carbon dioxide from the absorbing liquid in a high-temperature environment to discharge the carbon dioxide, and return the absorbing liquid from which the carbon dioxide has been separated to the absorber,
a first circulation line configured to take out the absorbing liquid from an inside of the regenerator and then return the taken-out absorbing liquid to the inside of the regenerator,
a second circulation line configured to take out the absorbing liquid from the inside of the regenerator and then return the taken-out absorbing liquid to the inside of the regenerator,
a heat exchanger in the first circulation line to heat the absorbing liquid by exchanging heat between the absorbing liquid flowing through the first circulation line and the steam from the boiler,
a heater in the second circulation line to heat the absorbing liquid flowing through the second circulation line, and
a switcher configured to switch between a first heating state in which the absorbing liquid flows through the first circulation line and a second heating state in which the absorbing liquid flows through the second circulation line.