B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/14 (2006.01)
Patent
CA 2730865
The invention relates to a method for separating carbon dioxide from a flue gas of a fossil fuel-operated power plant. In the method, a fossil fuel (2) is initially burned in a combustion process, wherein a hot waste gas (3) containing carbon dioxide is produced. In a next process step, waste gas (3) containing carbon dioxide is brought into contact with an absorption medium (5) in an absorption process (4), wherein carbon dioxide is absorbed by the absorption medium (5), thus forming a charged absorption medium (6). In a subsequent process step, gaseous carbon dioxide (8) is thermally expelled from the charged absorption medium (6) in a desorption process (7). For this purpose, a vapor (9) is supplied to the desorption process (7), said vapor being injected into the charged absorption medium (6), wherein the condensation heat released by the condensation of the vapor (9) is transferred to the charged absorption medium (6), and the partial pressure of the carbon dioxide is simultaneously reduced in the desorption unit.
Linvention concerne un procédé pour séparer le dioxyde de carbone dun gaz de combustion rejeté par une centrale électrique fonctionnant aux énergies fossiles. Le procédé consiste à brûler dabord un combustible fossile (2) au cours dun processus de combustion à lissue duquel on obtient un gaz déchappement (3) chaud chargé en dioxyde de carbone. Lors dune étape suivante de ce procédé, on met en contact le gaz déchappement (3) chargé en dioxyde de carbone et un milieu absorbant (5) au cours dun processus dabsorption (4), du dioxyde de carbone étant extrait du milieu absorbant (5) et un milieu absorbant (6) chargé étant ainsi obtenu. Lors dune étape suivante de ce procédé, on chasse thermiquement le dioxyde de carbone gazeux (8) du milieu absorbant (6) chargé au cours dun processus de désorption (7). Au cours du processus de désorption (7), on achemine de la vapeur (9) que lon injecte dans le milieu absorbant (6) chargé. La chaleur de condensation dégagée par la condensation de la vapeur (9) est transférée sur le milieu absorbant (6) chargé et dans le même temps, la pression partielle du dioxyde de carbone baisse dans lunité de désorption.
Joh Ralph
Schneider Ruediger
Schramm Henning
Aktiengesellschaft Siemens
Smart & Biggar
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