| 摘要 |
An osmosis element 30 comprises a central permeate tube 31 and a membrane element 40. The membrane has a first part 41 and a second part 42; the first part having a top edge for location adjacent the central tube, the second part being disposed at the opposite edge. The first part comprises a material to allow water to flow therethrough and the second part comprises at least two adjacent permeate spacers 41a extending from the first part to allow water to flow therethrough. The permeate spacers have a semi-permeable membrane 43 attached to opposed faces of the two adjacent permeate spacers. The first part 41 comprises a barrier 44,45 extending from the vicinity of the top edge. The central tube 31 comprises an external wall 35 and a longitudinally extending internal separator 33 defining a first channel 31a and a second channel 31b each extending longitudinally of the central permeate tube. At least one first aperture 34a extends from the first channel though the external wall and at least one second aperture 34b extends from the second channel through the external wall. Advantageously a plurality of osmosis elements may be connected together and located in a pressure vessel. |
