Plant and process for removing carbon dioxide from gas streams

Details Plant and process for removing carbon dioxide from gas streams Plant and process for removing carbon dioxide from gas streams

B - Operations, Transporting

01

D

B01D 53/14 (2006.01) B01D 53/18 (2006.01) B01D 53/96 (2006.01) F25J 3/02 (2006.01)

Patent

CA 2619097

The present invention is based on the realization that the carbon dioxide component of industrial gas streams also containing steam can be processed so to utilize either as latent and/or sensible heat the heat available from the steam component to assist in separating carbon dioxide from the remainder of the gas stream. For example, flue gases produced by power stations burning brown coal, black coal or natural gas inherently contain a useful amount of energy that can be harnessed according to the present invention. According to particular preferred forms of the invention, nitrogen and sulphur constituent such as SOx and NOx, H2S and other nitrogen containing compounds may also be removed from the gas stream through direct contact with the absorbing medium and used to produce by-products such as fertiliser material.

L'invention se base sur la constatation que les composants de CO2 des fumées industrielles contiennent également des gaz pouvant être traités pour en utiliser l'énergie thermique latente et/ou sensible disponible pour contribuer à déparer le CO2 du reste du flux gazeux. Par exemple les fumées produites par les centrales thermiques brûlant du charbon, du lignite ou du gaz, contiennent encore une quantité utilisable d'énergie pouvant être récupérée. Selon des formes particulières préférées de l'invention, les constituants d'azote et de soufre tels que SOx et NOx, H2S et autres composés contenant de l'azote peuvent également être retirés des fumées par contact direct avec le milieu absorbant, et servir à produire des sous-produits tels que des engrais.

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