SEPARATION MEMBRANE ELEMENT

摘要

A separation membrane element of the present invention includes: a water collection tube; and a plurality of separation membrane leaves stacked on each other and wound around the water collection tube, each of the separation membrane leaves includes one or more separation membranes each having a feed-side face and a permeate-side face and is configured so that the feed-side faces face each other, and a sheet having a plurality of projections fixed thereto is provided between the permeate-side faces of the separation membrane leaves stacked on each other. Regarding a height of the projections, a ratio of the maximum height to the minimum height is from 1.10 to 1.50, and a variation coefficient of the height is from 0.02 to 0.15, and an impregnation ratio of the projections into the sheet is from 10% to 100%.

主权项

1. A separation membrane element comprising: a water collection tube; and a plurality of separation membrane leaves stacked on each other and wound around the water collection tube,
wherein each of the separation membrane leaves comprises one or more separation membranes each having a feed-side face and a permeate-side face and is configured so that the feed-side faces face each other, a sheet having a plurality of projections fixed thereto is provided between the permeate-side faces of the separation membrane leaves stacked on each other, regarding a height of the projections, a ratio of the maximum height to the minimum height is from 1.10 to 1.50, and a variation coefficient of the height is from 0.02 to 0.15, and an impregnation ratio of the projections into the sheet is from 10% to 100%.