Patent ID: 9561472
Date: 2017-02-07
CPC Classifications: B01D

Claim:
1. A submerged hollow fiber membrane module, comprising: an upper header and a lower header which are positioned parallel to each other by a predetermined distance therebetween; hollow fiber membranes arranged in a perpendicular direction between the upper header and the lower header; and a partition membrane provided to enclose the hollow fiber membranes, the partition membrane having openings, each of the openings includes an inlet on an outer surface side of the partition membrane, and an outlet on an inner surface side of the partition membrane, wherein the inlet and the outlet for each of the openings are connected at a slant so that the outlet is closer to the upper header than the inlet along a longitudinal direction of the hollow fiber membranes, such that each of the openings is configured to accelerate an upward water flow as water flows in via the inlet at the outer surface side of the partition membrane and flows out via the inlet at the inner surface side of the partition membrane, so that upon filtration, the upward water flow formed inside of the partition membrane does not diffuse to the outside of the partition membrane, and raw water outside of the partition membrane is introduced into the inside of the partition membrane.