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1. WO1991000767 - FILTER CYLINDER

Publication Number WO/1991/000767
Publication Date 24.01.1991
International Application No. PCT/FI1990/000168
International Filing Date 26.06.1990
Chapter 2 Demand Filed 19.01.1991
IPC
B01D 33/09 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
33Filters with filtering elements which move during the filtering operation
06with rotary cylindrical filtering surfaces, e.g. hollow drums
073arranged for inward flow filtration
09with surface cells independently connected to pressure distributors
CPC
B01D 33/09
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
33Filters with filtering elements which move during the filtering operation
06with rotary cylindrical filtering surfaces, e.g. hollow drums
073arranged for inward flow filtration
09with surface cells independently connected to pressure distributors
Applicants
  • A. AHLSTROM CORPORATION [FI/FI]; SF-29600 Noormarkku, FI (AllExceptUS)
  • HEINO, Jukka [FI/FI]; FI (UsOnly)
  • KOHONEN, Raimo [FI/FI]; FI (UsOnly)
Inventors
  • HEINO, Jukka; FI
  • KOHONEN, Raimo; FI
Agents
  • ANSALA, Jyrki; A. Ahlstrom Corporation Patent Department P.O. Box 18 SF-48601 Karhula, FI
Priority Data
89328806.07.1989FI
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FILTER CYLINDER
(FR) CYLINDRE DE FILTRAGE
Abstract
(EN)
The invention relates more closely to a so-called drum filter, the basic construction of which comprises a vessel, to which suspension being thickened is supplied and in which vessel a wire-surfaced cylinder rotates. The drum filter in accordance with the present invention is characterized in that its filtrate compartments (20) comprise a bottom part (28, 30) and a side surface (32), which is provided with a lip or bending (34) extending towards the inside of the compartment (20) at the edge opposite relative to the bottom plane, which lip (34) prevents the filtrate from escaping from the compartment (20) back through the wire surface, when the compartment (20) is inclined.
(FR)
L'invention concerne plus particulièrement un filtre à tambour, dont la construction de base comporte un récipient auquel est amenée une suspension en cours d'épaississement et dans lequel tourne un cylindre à surface de fils. Selon cette invention, le filtre à tambour est caractérisé en ce que ses chambres à filtrat (20) comportent une partie de fond (28, 30) et une surface latérale (32), qui est dotée d'un bec ou d'un fléchissement (34) s'étendant vers l'intérieur de la chambre (20) au bord opposé par rapport au plan de fond, lequel bec (34) empêche le filtrat de s'échapper de la chambre (20) à travers la surface de fils, lorsque la chambre (20) est inclinée.
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