B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 36/00 (2006.01) B01D 21/26 (2006.01) B01D 61/18 (2006.01) B01D 61/20 (2006.01) B01D 61/22 (2006.01) B04B 3/00 (2006.01)
Patent
CA 2632255
In a system for combined centrifugation and microfiltration, retentate from a cross-flow microfilter is fed to an automatic piston discharge centrifuge for solids removal, thereby enhancing the efficiency of both processes. The centrifuge includes a cylindrical bowl having a conical lower end with an opening through which feed liquid is injected. Solids separate from the feed liquid and accumulate along the inner surface of the bowl as the bowl rotates at high speed. A microfiltration membrane can be added to improve solids retention in the bowl and provide a filtered centrate. During solids discharge, a piston is urged downward along a vertical axis.. The downward movement of the piston forces accumulated solids from the bowl via the opening in the conical lower end thereof.
L'invention porte sur un système combiné de centrifugation et microfiltration dans lequel on distribue à une centrifugeuse d'évacuation à piston automatique un rétentat en provenance d'un microfiltre à débits croisés afin de séparer les solides, améliorant de la sorte l'efficacité des deux processus. La centrifugeuse comprend une cuve cylindrique munie d'un fond conique percé d'une ouverture à travers laquelle est injecté un liquide d'alimentation. Les solides se séparent du liquide d'alimentation et s'accumulent le long de la surface interne de la cuve au fur et à mesure que la cuve tourne à grande vitesse. On peut ajouter une membrane de microfiltration afin d'améliorer la rétention des solides dans la cuve et d'obtenir un surnageant filtré. Au cours de l'évacuation des solides, un piston est poussé vers le bas le long d'un axe vertical. Le mouvement du piston vers le bas force les solides accumulés dans la cuve à sortir via l'ouverture du fond conique.
Ridout & Maybee Llp
Wagner Development Inc.
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