Circulating fluidised bed apparatus for chemical and...

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 8/26 (2006.01) B01J 8/00 (2006.01) B01J 8/18 (2006.01)

Patent

CA 2235493

The invention relates to an apparatus suited for carrying out physical and chemical processes comprised of two separate unit processes using a particulate matter medium, wherein the second unit process serves for regeneration of the particulate matter contaminated in the first unit process. The apparatus comprises a first reactor (1-3) for carrying out the first unit reaction; a second reactor (4-6) for carrying out the second unit reaction; adapted between the first reactor (1-3) and the second reactor (4-6), a first transfer channel (20) serving for the transfer of contaminated particulate matter from the first reactor to the second; and adapted between the second reactor (4-6) and the first reactor (1- 3), a second transfer channel (29) serving for the transfer of regenerated particulate matter from the second reactor to the first. According to the invention, the first reactor (1-3) comprises a circulating fluidized-bed reactor with a reaction space of an axially annular cross section, and the second reactor (4-6) comprises a circulating fluidized-bed reactor surrounding the first reactor in a symmetrically concentric fashion, whereby also the second reactor has a reaction space of an axially annular cross section. The construction according to the invention makes it possible to implement also large equipment with a small height-to-diameter ratio, whereby the footprint/space requirements of the equipment are minimized and problems associated with thermal expansion are reduced essentially.

L'invention concerne un dispositif convenant pour mettre en oeuvre des procédés physiques et chimiques constitués de deux procédés unitaires séparés qui utilisent un milieu à base de matière particulaire, le second procédé servant à régénérer le matériau particulaire contaminé durant le premier. Le dispositif comprend un premier réacteur (1-3), qui effectue la réaction de la première unité; un second réacteur (4-6), qui effectue la réaction de la seconde unité; disposé entre le premier (1-3) et le second réacteur (4-6), un premier canal de transfert (20) sert à transporter le matériau particulaire contaminé depuis le premier réacteur jusqu'au second; et, disposé entre le second (4-6) et le premier réacteur (1-3), un second canal de transfert (29) sert à transporter la matière particulaire régénérée depuis le second réacteur jusqu'au premier. Selon l'invention, le premier réacteur (1-3) comprend un réacteur à lit fluidisé circulant qui comporte un espace de réaction dont la section axiale est annulaire, et le second réacteur (4-6), qui comprend un réacteur à lit fluidisé circulant entourant le premier réacteur d'une manière concentrique et symétrique, comporte également un espace de réaction dont la section axiale est annulaire. La configuration de l'invention permet de construire également de grands appareils ayant un rapport hauteur/diamètre faible, en minimisant l'encombrement/les besoins en surface de l'installation et en réduisant sensiblement les problèmes associés à la dilatation thermique.

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