Purification works for thermal power plant

Details Purification works for thermal power plant Purification works for thermal power plant

F - Mech Eng,Light,Heat,Weapons

23

J

F23J 15/00 (2006.01)

Patent

CA 2542610

A method for separation of CO2 from the combustion gas from a thermal power plant fired with fossil fuel, wherein the combustion gas from the thermal power plant is used as cooled, compressed and reheated by combustion of natural gas in a combustion chamber to form an exhaust gas, where the exhaust gas is cooled an brought in contact with an absorbent absorbing CO2 from the exhaust gas to form a low CO2 stream and an absorbent with absorbed CO2, and where the low CO2 stream is heated by means of heat exchanges against the hot exhaust gas leaving the combustion chamber before it is expanded in turbines, is described. A plant for performing the method and a combined plant is also described.

La présente invention concerne un procédé pour séparer du CO<SUB>2</SUB> du gaz de combustion issu d'une centrale thermique, brûlé avec du combustible fossile. Le gaz de combustion issu de la centrale thermique est utilisé sous forme refroidie, comprimée et réchauffée par combustion de gaz naturel dans une chambre de combustion, afin de former un gaz de combustion. Le gaz de combustion est refroidi et mis en contact avec un agent absorbant qui absorbe du CO<SUB>2</SUB> issu du gaz de combustion, afin d'obtenir un flux à faible teneur en CO<SUB>2</SUB> et un agent absorbant avec du CO<SUB>2</SUB> absorbé. Le flux à faible teneur en CO<SUB>2</SUB> est chauffé au moyen d'échanges thermiques avec le gaz de combustion chaud qui quitte la chambre de combustion avant d'être dilaté dans des turbines. La présente invention concerne également une centrale permettant de mettre en oeuvre ledit procédé, ainsi qu'une centrale combinée.

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