C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 11/12 (2006.01) B01D 5/00 (2006.01) B01D 35/027 (2006.01) C02F 11/00 (2006.01)
Patent
CA 2662770
An object of the present invention is to provide a filtering and condensing apparatus of the suction type which is capable of improving the filtering efficiency by securing the filtering area, while at the same time keeping an integrity of the filtering cloth. A filtering and condensing apparatus of a suction type comprises a sludge tank for containing sludge to be filtered and condensed, and a plurality of filtering plates aligned with each other so as to be disposed to be adjacent to each other in the sludge tank. Each plane portion of the filtering plates extends in the vertical direction. Each of the filtering plates includes a supporting plate in the form of a net, and a filtering cloth in a bag form so as to be integrally sewed on the supporting plate and to house the supporting plate, whereby a filtering chamber is formed inside the filtering cloth, The apparatus further includes a means for sucking the filtering cloth through the filtering chamber, a means for expanding the filtering cloth through the filtering chamber, and a means for constantly applying a tension force to each of the filtering plates which is disposed to be over the periphery of each of the plurality of the filtering plates. Each of the filtering clothes are divided in the lateral direction of the corresponding filtering plate by a plurality of vertically extending seams to form the filtering chamber at every divided zone, the lateral length of a portion of each of the filtering clothes divided by the adjacent seams is set to be longer than the lateral length of a portion of the supporting plate corresponding to the corresponding zone over the entire vertical direction, whereby each of the zones includes an expanding margin upon the expansion of the corresponding filtering cloth.
La présente invention concerne un appareil de filtration-condensation de type aspiration, qui comprend un bain de boue (12) et une pluralité de plaques filtrantes (14) disposées en matrice adjacentes l'une à l'autre dans le bain de boue (12). Les plaques filtrantes (14) comprennent une plaque support sous forme de filet (50) et un tissu filtrant sous forme de sac (18) de sorte qu'une chambre filtrante (76) soit formée dans le tissu filtrant (18). L'invention concerne en outre un moyen d'aspiration destiné à aspirer le tissu filtrant (18), un moyen de gonflage, et un moyen pour appliquer une tension destiné à appliquer une tension à tout moment aux plaques filtrantes (14). L'appareil de filtration-condensation de type aspiration est caractérisé en ce que le tissu filtrant (18) est divisé de manière transversale sur les plaques filtrantes correspondantes (14) par une pluralité de points de liage s'étendant verticalement (74) formant de ce fait la chambre filtrante (76) pour chaque division. L'appareil est également caractérisé en ce que la longueur transversale des parties du tissu filtrant (18), lesquelles sont divisées par les points de liage adjacents (74), est fixée le long de la direction verticale à une valeur supérieure à la longueur transversale de la plaque support (50), de sorte que les sections individuelles puissent se gonfler afin que le tissu filtrant (18) puisse se gonfler.
Kunitani Tadashi
Sakai Eiji
Yamane Hiroyasu
Barrigar Intellectual Property Law
Metawater Co. Ltd.
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