| 摘要 |
<p>A wound reverse osmosis membrane element (10), is formed by winding around a central produced water pipe (400) at least one water cleaning membrane components (11) composed by stacking a pure water stream guidance net (100), a reverse osmosis membrane (200) and a feed water stream guidance net (300). The reverse osmosis membrane (200) is folded such that a feed water passage (210) is formed by the inner surface and a produced water passage (220) is formed between the adjacent outer surfaces. The feed water stream guidance net (300) is located in the feed water passage (210), while the pure water stream guidance net (100) is located in the produced water passage (220). The produced water passage (220) has only a pure water outlet (221) facing the central produced water pipe (400), and the other three sides (222, 223, 224) are closely sealed. A part section of the two sides (212, 213) of the feed water passage (210) adjacent to the folding line (211) is closely sealed, such that small feed water inlet sections (214) adjacent to the central produced water pipe (400) are formed respectively on the two sides (212, 213) and a concentrate water outlet (215) is formed on the side opposite to the folding line (211). The reverse osmosis membrane element (10) of the present invention has increased water velocity on the membrane surface, weakened concentration polarization on the membrane surface and reduced pollution rate of the wound membrane element (10), so that the service life of the membrane element (10) is prolonged.</p> |
