Stock washer for washing, thickening and classifying solids

Details Stock washer for washing, thickening and classifying solids Stock washer for washing, thickening and classifying solids

D - Textiles, Paper

21

C

D21C 9/06 (2006.01) B01D 29/11 (2006.01) D21D 1/40 (2006.01)

Patent

CA 2255833

The apparatus (10) is a washer, thickener and classifier for recovering solids from liquids including a truncated conical screen (12) with walls typically sixty degrees from the horizontal and formed of filter media. Stock sprayer assemblies (36) rotate about a longitudinal axis of said conical screen (12) and direct stock, particularly deink paper stock, onto the walls of the conical screen (12). Wash fluid sprayer (42) assemblies, including high impact shower nozzles (44), direct wash fluid onto the stock on the walls of the conical screen (12). The wash fluid cleans the stock, with the unwanted solids and contaminants passing through the conical screen (12) to the discharge pipe (16). The wash fluid similarly washes the stock through the exit (16) formed at the truncated portion formed at the apex of the conical screen (12) for subsequent processing.

Installation de lavage, épaississement et tri permettant l'extraction de particules solides contenues dans des liquides, comprenant un écran tronconique comportant des parois placées généralement à soixante degrés par rapport à l'horizontale et composées de matériaux filtrants. Des ensembles gicleurs de pâte tournent autour d'un axe longitudinal dudit écran tronconique et dirigent la pâte, notamment la pâte à papier à désencrer, sur les parois de l'écran tronconique. Des ensembles gicleurs de fluide de lavage, comprenant des ajutages de douche à impact élevé, dirigent le fluide de lavage contre la pâte sur les parois de l'écran. Le fluide de lavage nettoie la pâte, et les particules solides et les impuretés traversent l'écran tronconique et s'écoulent dans les conduites de décharge. Le fluide de lavage entraîne également la pâte nettoyée à travers la sortie formée dans la partie tronquée située au sommet de l'écran, en vue d'un traitement ultérieur.

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