Method and device for separating carbon dioxide from a waste gas of a fossil fueloperated power plant
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Abstract
A method for separating carbon dioxide from a flue gas of a fossil fuel-operated power plant is provided. In the method, a fossil fuel is initially burned in a combustion process, wherein a hot waste gas containing carbon dioxide is produced. In a next process step, waste gas containing carbon dioxide is brought into contact with an absorption medium in an absorption process, wherein carbon dioxide is absorbed by the absorption medium, thus forming a charged absorption medium. Next, gaseous carbon dioxide is thermally expelled from the charged absorption medium in a desorption process. For this purpose, a vapor is supplied to the desorption process, the vapor is injected into the charged absorption medium, wherein the condensation heat released by the condensation of the vapor is transferred to the charged absorption medium, and the partial pressure of the carbon dioxide is simultaneously reduced in the desorption unit.
13 Citations
25 Claims
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1-12. -12. (canceled)
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13. A method for separation of carbon dioxide from a flue gas of a fossil-fueled power station, comprising:
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burning a fossil fuel in a combustion process producing a hot off-gas comprising carbon dioxide; bringing the hot off-gas comprising carbon dioxide into contact with an absorption medium in an absorption process where carbon dioxide is absorbed by the absorption medium forming a loaded absorption medium; thermally forcing out gaseous carbon dioxide of the loaded absorption medium in a desorption process; and supplying a steam, which is injected into the loaded absorption medium, with the condensation heat released by condensation of the steam being transferred to the loaded absorption medium. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A fossil-fueled power station, comprising:
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a separation device; a combustion device; an absorption unit; and a desorption unit, wherein the separation device is connected downstream from the combustion device and is used for a separation of carbon dioxide from an off-gas which comprises carbon dioxide, wherein the separation device includes an absorption unit for absorption of gaseous carbon dioxide, and a desorption unit for emission of gaseous carbon dioxide, and wherein the desorption unit includes an injection device for steam, which injection device is connected to a steam line such that steam may be injected into the desorption unit during operation of the separation device. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification