| 摘要 |
PROBLEM TO BE SOLVED: To provide a filtration device enhancing washing efficiency of hollow fiber membrane when filtering or washing by partially increasing a quantity of flowing in water to a hollow fiber membrane module.SOLUTION: In a filtration device having a plurality of hollow fiber membranes each having a hollow fiber membrane, a case housing the hollow fiber membrane, a first pipe opening arranged in the case, and second pipe openings arranged in different sites of the case, and a joint, the joint has a circular pipe shape extended in a longitudinal direction, an inner pipe, a plurality of coupling openings in an outer peripheral surface, is coupled to the respective second pipe openings via the coupling openings, the inner pipe has a plurality of holes in the side surface of the same and is rotatable, the plurality of holes of the inner pipe are arranged at positions corresponding to the coupling openings of the joint in the longitudinal direction and at respective different positions in the outer peripheral surface of the inner pipe at the positions corresponding to the coupling openings. |
