B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 8/00 (2006.01) F27B 15/02 (2006.01)
Patent
CA 2325483
According to the invention, a fluidizing gas is introduced upwards into the fluidized bed (3) through a valve grid (2), said stationary fluidized bed (3) containing solids with different grain sizes. A supply pipe (10) is disposed in the area of the fluidized bed, the mouth of said pipe being located above the valve grid (2) and its outlet (12) leading outwards from the fluidized bed (3). Part of the solids located above the valve grid (2) is blown into the supply pipe by a gas jet (13) which is directed upwards and fed separately from the fluidizing gas and pneumatically evacuated from the fluidized bed through the supply pipe (10). Normally, the flow speed of the gas in the supply pipe is at least two times higher than the speed of the fluidizing gas in the fluidized bed.
Selon l'invention, on introduit un gaz de fluidification dans un lit fluidisé stationnaire (3) contenant des solides de différentes granulométries, et ce par le bas via une grille (2). La zone du lit fluidisé renferme un tuyau de transport (10) dont l'ouverture se situe au-dessus de la grille (2) et la sortie (12) permet l'évacuation à partir du lit fluidisé. Par un jet gazeux (13) ascensionnel, acheminé séparément du gaz de fluidisation, une partie des solides se trouvant au-dessus de la grille (2) est soufflée dans le tuyau et évacuée du lit fluidisé par voie pneumatique par ce tuyau (10). Normalement, la vitesse d'écoulement du gaz dans le tuyau est au moins les deux fois celle du gaz de fluidisation dans le lit fluidisé.
Hirsch Martin
Orth Andreas
Weber Peter
Metallgesellschaft Ag
Robic
LandOfFree
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