| 摘要 |
The invention relates to a method and a system for removing carbon dioxide from flue gas (3) emitted by a fossil fuel (2)-operated power plant. In said method and system, carbon dioxide is removed from the flue gas (3) by means of an absorption process (16) using a scrubbing liquid (14). The charged scrubbing liquid (12) is regenerated in a desorption process (11). At least some of the energy required for the regeneration process is fed using low-pressure steam that is withdrawn from the steam-water circuit of the power plant before entering a low-pressure steam turbine (6). The low-pressure steam is fed to an intermediate steam turbine (9). The low-pressure steam is expanded to a discharge pressure of less than 3.5 bar and is then fed to the desorption process (11). According to the invention, the pressure for the desorption process (11) is adjusted by a regulation device in accordance with the discharge pressure from the intermediate steam turbine (9). |
