Seawater desalination system
作者： Shigeo Takita , 後藤 彰 , 茂雄 滝田 , Akira Goto , 圭瑞 高橋
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摘要: Provided is a seawater desalination system using reverse osmosis separation device, wherein in order to make it possible control, according the characteristics of membrane, pressure change rate or flow with respect membrane at start and stop high-pressure pump, drive power source control device (300) composed parallel circuit reduced voltage starter (12) switch (13) connected between an electric motor (3) for driving pump (4) alternating current (100). Control causes that supplied increase continuously during start-up adjustment duration so as asymptotically approach from zero upwardly-convex monotonically-increasing function, decrease far state having approached monotonically-decreasing function. The closed when via equal (100) directly motor.
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