Apparatus/method for uniform fluidized bed sorting

Details Apparatus/method for uniform fluidized bed sorting Apparatus/method for uniform fluidized bed sorting

B - Operations, Transporting

07

B

B07B 11/00 (2006.01) B03B 4/02 (2006.01) B03B 5/46 (2006.01)

Patent

CA 2119653

An apparatus (10) for providing a fluidized bed (12) to effect the separation of a mixture of articles (22) having a first density and a second density that is greater than the first density into separate groups. The apparatus (10) includes an inclined trough (12) which is supplied with either a fluidization on medium, such as sand, or a mixture of articles (22) from which a fluidized bed is formed by forcing gas upwardly therethrough and through the bottom of the trough (12). Where a fluidization medium is used, the mixture of articles (22) is introduced into the fluidized bed medium so as to be entrained therewith to effect separation as the articles travel in the direction of flow of the fluidized bed medium. Essentially only vertical oscillatory movement is imparted to the trough to improve the separation and layering where the mixture is fluidized, or to improve the density uniformity where a fluidization medium is fluidized as the bed.

Un appareil (10) à lit fluidisé (12) permet de séparer un mélange d'articles (22) ayant une première densité et une deuxième densité supérieure à la première densité en groupes séparés. L'appareil (10) comprend un auge inclinée (12) qui reçoit un milieu de fluidification, tel que du sable, ou un mélange d'articles (22) avec lesquels on forme un lit fluidisé en insufflant un courant ascendant de gaz à travers les articles et à travers le fond de l'auge (12). Lorsque l'on utilise un milieu de fluidification, le mélange d'articles (22) est introduit dans le lit fluidisé de manière à être entraîné par cleui-ci et à provoquer la séparation des articles à mesure que ceux-ci se déplacent dans le sens d'écoulement du milieu formant le lit fluidisé. Essentiellement, seul un mouvement oscillatoire vertical est imprimé à l'auge afin d'améliorer la séparation et la stratification lorsque le mélange est fluidisé, ou afin d'améliorer l'uniformité des densités lorsque un milieu de fluidification est fluidisé pour servir de lit fluidisé.

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