Method and apparatus in a fluidized bed heat exchanger

Details Method and apparatus in a fluidized bed heat exchanger Method and apparatus in a fluidized bed heat exchanger

F - Mech Eng,Light,Heat,Weapons

28

D

F28D 13/00 (2006.01) B01J 8/24 (2006.01) F22B 31/00 (2006.01) F23C 10/10 (2006.01)

Patent

CA 2345695

A method and an apparatus in a fluidized bed heat exchanger (10) comprising a heat exchange chamber (12) having a fluidized bed (14) of solid particles, heat transfer surfaces (30), an inlet (24) and an outlet (34) arranged above the bed of solid particles. Particles are fed through the inlet onto the upper surface (28) of the bed of solid particles by a guiding channel (26). The guiding channel extends from above the upper surface of the bed of solid particles to the surface thereof or below the surface and passes the solid particles to the restricted area (28') of the surface. The outlet (34) is also formed in the area of the guiding channel to remove particles from the area delimited by the guiding channel. Uncooled particles can thus be removed from the heat exchange chamber.

Procédé et appareil destinés à un échangeur (10) de chaleur à lit fluidisé comprenant une chambre (12) d'échange thermique contenant un lit fluidisé (14) de particules solides, des surfaces (30) de transfert de chaleur, une entrée (24) et une sortie (34) située au-dessus du lit de particules solides. Les particules sont introduites par l'entrée au moyen d'un canal (26) de guidage au-dessus de la surface supérieure (28) du lit de particules solides. Le canal de guidage s'étend depuis le dessus de la surface supérieure du lit de particules solides jusqu'à la surface de ce dernier ou bien sous cette surface et traverse les particules solides jusqu'à la zone limitée (28') de la surface. La sortie (34) est également formée dans le canal de guidage pour éliminer les particules de la zone délimitée par le canal de guidage. Les particules non refroidies peuvent ainsi être évacuées de la chambre d'échange thermique.

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