F - Mech Eng,Light,Heat,Weapons – 28 – D
Patent
F - Mech Eng,Light,Heat,Weapons
28
D
F28D 1/02 (2006.01) B01D 9/00 (2006.01) B01F 7/16 (2006.01) B01F 15/06 (2006.01) B01J 19/00 (2006.01) B01J 19/24 (2006.01) F28D 1/03 (2006.01) F28D 21/00 (2006.01)
Patent
CA 2099285
The invention described is an apparatus for heating or cooling solid suspension slurry. The apparatus comprises a vessel (1) for containing the slurry and a draft means contained within a draft section of a draft tube (2) to circulate and maintain the suspension. Extending substantially the length of cylindrical section (26) of the draft tube below the draft means are plate heat exchangers (7, 21, 23, 25, 27, 29) connected in series. The plate heat exchangers may be recessed into the wall of the draft tube so as not to increase the pressure drop through the draft tube or may be arranged in pairs along the axis of the draft tube so that the proportion of the cross-sectional area of the draft tube occupied by the heat exchangers is minimized.
L'invention concerne un appareil permettant de chauffer ou de refroidir une suspension épaisse de solides. L'appareil comprend une cuve (1) qui contient ladite suspension et un dispositif de tirage, contenu dans la section de tirage d'un tube aspirateur (2) et qui fait circuler la suspension pour maintenir son état. Des échangeurs thermiques à plaques (7, 21, 23, 25, 27, 29) connectés en série s'étendent sur sensiblement toute la section cylindrique (26) du tube aspirateur, en dessous du dispositif de tirage. Les échangeurs thermiques à plaques peuvent se trouver dans des évidements de la paroi du tube aspirateur de manière à ne pas augmenter la chute de pression dans le tube aspirateur ou peuvent être disposés en paires le long de l'axe du tube aspirateur de sorte que l'espace occupé dans la section transversale du tube aspirateur par les échangeurs thermiques est minime.
Bursle Arthur J.
Crisp Anthony J.
Wood David G.
Comalco Aluminium Limited
Oyen Wiggs Green & Mutala Llp
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