Method and apparatus for separating a gaseous component

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01)

Patent

CA 2752988

The invention relates to a method and an apparatus for separating at least one gaseous component from a waste gas (14) of an installation for producing liquid pig iron (24), liquid primary steel products or sponge iron, wherein, in a first step, a stream of the waste gas (14) passes through at least one adsorption separator (16) at a first pressure, whereby the gaseous component is largely separated from the waste gas (14) and, in a second step, the gaseous component is largely removed from the adsorption separator (16) at a second pressure, which is lower than the first pressure. The object of the invention is to provide a method and an apparatus that is maintenance--free, causes low investment and energy costs and has a lower space requirement. This object is achieved by a method in which the second pressure or the desorption pressure is generated by at least one jet pump (7), which is fed a stream of a propellant gas (28) at a third pressure, which is higher than the second pressure.

L'invention concerne un procédé et un dispositif de séparation d'au moins un constituant gazeux contenu dans des fumées (14) d'une installation pour la production de fonte liquide (24), de demi-produits en acier liquide ou d'éponge de fer. Dans une première étape, un flux de fumées (14) parcourt au moins un séparateur par adsorption (16) sous une première pression, le constituant gazeux étant ainsi en majeure partie séparé des fumées (14), et, dans une seconde étape, le constituant gazeux est en majeure partie éliminé du séparateur par adsorption (16) sous une deuxième pression qui est inférieure à la première. Le but de l'invention est de fournir un procédé ainsi qu'un dispositif sans entretien, moins encombrant et engendrant des coûts d'énergie et d'investissement moindres. Ce but est atteint grâce à un procédé selon lequel la deuxième pression ou la pression de désorption est produite par au moins une pompe à jet (7) à laquelle est amené un flux de gaz propulseur (28) sous une troisième pression qui est supérieure à la deuxième.

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