Dust extraction installation for blast furnace gas

Details Dust extraction installation for blast furnace gas Dust extraction installation for blast furnace gas

C - Chemistry, Metallurgy

21

B

C21B 7/22 (2006.01) B04C 5/06 (2006.01) F27B 1/18 (2006.01)

Patent

CA 2350725

The preliminary cleaning stage of a dust extraction installation for blast furnace gas consists of a large-size cyclone (10) which comprises a vertical pressurized tank (14). A blast furnace gas line (12) arriving from the blast furnace is connected to an axial delivery device (34, 26, 28, 50) situated at the upper end of the pressurized tank (14). The delivery device (34, 26, 28, 50) is configured such that it introduces the blast furnace gas into the pressurized tank (14) in an axial direction. A swirl device (58) with guide vanes (66) is positioned below the axial delivery device (34, 26, 28, 50) and causes the blast furnace gas which is axially introduced into the pressurized tank (14) to swirl about the axis (30) of said pressurized tank (14).

Selon l'invention, l'étage de prénettoyage d'une installation de dépoussiérage pour gaz de haut fourneau est formé par un cyclone (10) de grande taille qui entoure un réservoir sous pression (14) en position verticale. Une conduite à gaz de gueulard (12) provenant du haut fourneau est raccordée à un dispositif d'introduction (34, 26, 28, 50) axial, situé à l'extrémité supérieure dudit réservoir sous pression (14). Le dispositif d'introduction (34, 26, 28, 50) est conçu de telle sorte qu'il fait entrer le gaz de haut fourneau, dans le sens axial, dans le réservoir sous pression (14). Un dispositif de tourbillonnement (58), pourvu de pâles fixes (66), est placé en-dessous du dispositif d'introduction (34, 26, 28, 50) axial. Ce dispositif de tourbillonnement sert à faire tourbillonner, autour de l'axe (30) du réservoir sous pression (14), le gaz de haut fourneau introduit axialement dans celui-ci.

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