F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 13/08 (2006.01) D21C 9/00 (2006.01) D21C 9/10 (2006.01) F28D 7/10 (2006.01) F28F 13/06 (2006.01)
Patent
CA 2318878
The present invention relates to a method and an apparatus for heating or cooling material having poor thermal conductivity, especially medium- consistency fibre suspensions. The material is directed, substantially as a plug flow, through an apparatus formed by a flow channel (12) provided with heat exchange surfaces. The flow of the material is throttled at a throttling point by means (16, 18) for throttling the cross-sectional area of the chanel. After throttling, the material is discharged from the throttling point in such a manner that another portion of the material is introduced on the heat exchange surfaces.
La présente invention concerne un procédé et un appareil de chauffage et de refroidissement de matériaux à faible conductibilité thermique, en particulier de suspensions fibreuses de consistance moyenne. Le matériau est dirigé, sensiblement sous la forme d'un écoulement obturateur, dans un appareil formé par un canal d'écoulement (12) comportant des surfaces d'échange thermique. L'écoulement du matériau est régulé par étranglement en un point d'étranglement, réalisé à l'aide d'éléments (16, 18) permettant de réduire l'aire transversale du canal. Après étranglement, le matériau est évacué du point d'étranglement de manière qu'une autre partie du matériau soit introduite sur les surface d'échange thermique.
Henricson Kaj
Peltonen Kari
Andritz Oy
Andritz-Ahlstrom Oy
Gowling Lafleur Henderson Llp
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