A method and device for treating wastes

B - Operations – Transporting – 02 – C

Patent

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B02C 23/08 (2006.01) B02C 18/00 (2006.01) B03B 9/06 (2006.01)

Patent

CA 2262731

A method for treating wastes, such as domestic wastes, industrial wastes and similar, the wastes passing several treatment steps and being thereafter separated in various fractions, characterized in that it consists of at least the following steps: a coarse crossing of the received waste materials; a heavy rejects separation of the waste materials in an aqueous phase and a removal of the rejects for further treatments; a grinding of the accepts from the heavy rejects separation and a transport of the ground materials and the fluid to a pulper; a dissolving of these materials in the pulper with a simultaneous, at least periodic grinding; a separation of the suspension completely treated in the pulper into various fractions; and a transport and a further treatment of the created fractions. The invention also relates to a device for performing the method. By means of the invention, a more effective handling of wastes is achieved and also, a large portion of heavy components are early removed from the process and a hawser-like formation is avoided of string-like components.

Procédé servant à traiter des déchets, tels que des déchets domestiques ou des déchets industriels, et consistant en différentes étapes de traitement, puis de séparation en différentes fractions. Ce procédé est caractérisé par le fait qu'il consiste au moins en les étapes suivantes: croisement grossier des déchets reçus; séparation des déchets rejetés lourds dans une phase aqueuse et enlèvement de ces derniers afin de continuer leur traitement; broyage des déchets acceptés à partir de la séparation des déchets rejetés lourds et transport des matériaux broyés et du liquide vers une machine de réduction en pâte; dissolution de ces matériaux dans la machine de réduction avec un broyage simultané, au moins périodique; séparation de la suspension complètement traitée dans la machine de réduction en différentes fractions; transport et continuation du traitement des fractions créées. L'invention concerne également un dispositif servant à mettre ce procédé en application. Elle permet d'améliorer la manipulation des déchets et, également, d'éviter l'apparition de cordes volumineuses d'éléments venant bout-à-bout, étant donné qu'une partie importante d'éléments lourds est enlevée pratiquement au début du processus.

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