Method and device for purifying a gas stream containing...

F - Mech Eng,Light,Heat,Weapons – 23 – J

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F23J 15/04 (2006.01)

Patent

CA 2750443

A method and a device for purifying a gas stream containing carbon dioxide are disclosed, wherein, firstly, in a lower region (3) of an absorption column (1) the gas steam is subjected to a prescrub to condition the gas stream and subsequently, in an upper region (8), of the absorption column (1) the carbon dioxide is at least partly scrubbed out of the gas stream by means of a scrubbing fluid. According to the invention, the construction of the absorption column may be improved, by withdrawing all the scrubbing fluid charged with the scrubbed carbon dioxide from the absorption column (1) and introduced into a reservoir (11) outside the absorption column (1) and then introduced into a scrubbing fluid pump (12) which pumps the scrubbing fluid to a scrubbing fluid regeneration stage.

L'invention concerne un procédé et un dispositif d'épuration d'un flux gazeux contenant du dioxyde de carbone, selon lequel le flux gazeux est d'abord acheminé jusqu'à une section inférieure (3) d'une colonne d'absorption (1) d'un prélavage pour le traitement du flux gazeux puis, dans une section supérieure (8) de la colonne d'absorption (1 ), le dioxyde de carbone est au moins en partie enlevé par lavage du flux gazeux au moyen d'un liquide laveur. Pour améliorer la conception de la colonne d'absorption, il est proposé que la totalité du liquide laveur, chargé en dioxyde de carbone enlevé par lavage, soit soutiré de la colonne d'absorption (1 ) pour être recueilli dans un réservoir (11 ) placé sous la colonne d'absorption (1 ) puis cédé à une pompe (12) pour liquide laveur, qui cède par pompage le liquide laveur à un étage de régénération du détersif.

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