| 摘要 |
Apparatus is described for purifying waste water or other feed fluid, which includes a stack of membrane packs wherein each pack contains a conduit sheet, a pair of support sheets of filter paper or the like, each lying against a face of the conduit sheet, and a pair of membranes each lying over a filter paper sheet. The pack has exit holes, and the filter paper extends up to the exit hole walls and has a region thereabout which is impregnated with an adhesive which seals the filter paper against the inflow of concentrate while also holding the filter paper to the conduit sheet and membranes. The packs are spaced apart by inner and outer gaskets, the radially inner gaskets having central holes forming a feed pipe for carrying the feed fluid to all the packs. The stack of membrane packs is rapidly rotated to provide centrifugal forces that help sweep away membrane-plugging material during radial flow of feed fluid from the feed pipe to the peripheries of the packs, and the exit holes of all of the packs are formed near their peripheries and are aligned to thereby form a concentrate-carrying "pipe" with gaps that receive the concentrate. |
