Patent ID: 7083726
Filing Date: 2006-08-01
Classification: B01D,C02F,D01D,D01F

Abstract:
1. A hollow fiber membrane cartridge that uses hollow fiber membranes and which is set in a tank type filtration apparatus, a rack type filtration apparatus or an immersion type filtration apparatus, in which filtration is carried out under a pressure or suction, comprising a bundle of a plurality of hollow fiber membranes, both ends of which are fixed by adhesion in adhesion and fixation layers, respectively, a cartridge head fixed at periphery of the bundle at one end so as not to permit passage of liquid either in or out, and a bottom ring fixed at periphery of the bundle at the other end so as not to permit passage of liquid either in or out, which is characterized in that said cartridge head and said bottom ring are connected and fixed to a plurality of rods or pipes and the rods or pipes being located so that the hollow fiber membranes can be exposed substantially throughout a range between the cartridge head and the ring bottom, wherein at least one of said rods or pipes is located near the periphery of the bundle of the hollow fiber membranes, each hollow fiber membrane is made of a poly(vinylidene fluoride) having a modulus in tension of not more than 60 Mpa and not less than 10 Mpa, the hollow portion at the end of each hollow fiber membrane on the cartridge head side is open, the hollow portion at the end of each hollow fiber membrane on the bottom ring side is sealed, and a plurality of through-holes are provided in the adhesion and fixation layer on the bottom ring side and are located in the bundle of the hollow fiber membranes.