Importance

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Abstract

A method and system for removing carbon dioxide from flue gas emitted by a fossil fuel operated power plant. In the method and system, carbon dioxide is removed from the flue gas by an absorption process using a scrubbing liquid. The charged scrubbing liquid is regenerated in a desorption process. At least some of the energy required for the regeneration process is fed using low-pressure steam that is withdrawn from the steam-water circuit of the power plant before entering a low-pressure steam turbine. The low-pressure steam is fed to an intermediate steam turbine. The low-pressure steam is expanded to a discharge pressure of less than 3.5 bar and is then fed to the desorption process. The pressure for the desorption process is adjusted by a regulation device in accordance with the discharge pressure from the intermediate steam turbine.

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First Claim