Liquids extractor

B - Operations – Transporting – 30 – B

Patent

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Details

B30B 9/20 (2006.01) B01D 33/067 (2006.01) B30B 15/00 (2006.01)

Patent

CA 2196443

An apparatus for extracting liquids from an aggregate formed of liquids and fibers, like from diluted manure or from paper mills residue. The apparatus has a rotatable drum covered with a resilient layer. The apparatus also has at least one draining roll which is pressed against the drum so that the aggregate passing in between is squeezed. Each roll has a shaft and at least two supporting discs fixed onto the shaft. The supporting discs have holes to let the collected liquids flow sideways. Each roll also has a hollow cylindrical shell. The shell is coaxial with the shaft and has a uniform distribution of openings. Each roll also has a perforated filter screen fixed against and around its outside surface. The screen has perforations evenly distributed so that only some perforations lie over openings in the shell. The perforations are smaller in size than the openings. The apparatus also has hoppers to collect liquids and wipers set against a lower part of each draining roll close to the nip in order to wipe the fibers off their screen. When the apparatus has several rolls, the openings in the lower rolls are smaller than in the upper rolls.

Appareil servant à extraire les liquides d'un mélange formé de liquides et de fibres notamment de fumier dilué ou de résidus de pâtes et papiers. L'appareil comprend un cylindre rotatif revêtu d'une couche de matériau résilient; au moins un rouleau de drainage qui s'appuie contre le cylindre de sorte que le mélange se trouve à être pressé lorsqu'il passe entre le cylindre et le rouleau. Chaque rouleau comporte un arbre et au moins deux disques de soutien montés sur l'arbre. Les disques de soutien comprennent des trous permettant aux liquides recueillis de s'écouler par les côtés. Chaque rouleau comprend un corps cylindrique creux monté coaxialement avec l'arbre et ses ouvertures sont réparties uniformément. Chaque rouleau comprend également un crible filtrant placé contre sa surface extérieure et autour de celle-ci. Le crible comporte des perforations réparties régulièrement de sorte que seulement quelques-unes des perforations se trouvent placées au-dessus des ouvertures aménagées dans le corps cylindrique. Le diamètre des perforations est plus petit que celui des ouvertures. L'appareil comprend également des réservoirs qui recueillent les liquides et des segments racleurs pressés contre la partie inférieure de chaque rouleau de drainage, près de la ligne de contact afin d'enlever les fibres du crible filtrant. Lorsque l'appareil comprend plusieurs rouleaux, les ouvertures des rouleaux inférieurs sont plus petites que celles des rouleaux supérieurs.

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