B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 29/94 (2006.01) B01D 29/84 (2006.01)
Patent
CA 2740403
A method and apparatus is disclosed for separating a slurry into liquids and solids in a pressure filter apparatus and for forming a substantially dry and often loosely packet filter solids cake wherein a high temperature and high pressure steam is introduced into an initially formed filter cake in the pressurized filter apparatus to force the steam into the interstices of the formed filter cake and then pressure within the filter apparatus is reduced to permit the steam to flash and to expand within the interstices to absorb any remaining fluids within the formed filter cake and to cause the filter cake to become substantially dry and loosely packed. The filtered solids cake is then discharged for the filter apparatus.
Cette invention concerne un procédé et appareil permettant de séparer une solution épaisse en liquides et en solides dans un appareil de filtration sous pression, et de former un gâteau de solides filtrés sensiblement sec et souvent tassé sans être serré. Un courant de haute température et de haute pression est introduit dans un gâteau de filtration préalablement formé dans lappareil de filtration sous pression de manière à passer dans les interstices du gâteau, la pression dans lappareil à filtration étant ensuite réduite pour permettre au courant de traverser et de combler les interstices pour absorber tout fluide restant dans le gâteau et obliger celui-ci à sécher sensiblement et à se tasser sans être serré. Le gâteau de solides filtrés est ensuite éliminé de lappareil de filtration.
Flsmidth A/s
Smart & Biggar
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