公开(公告)号：US4169789A

公开(公告)日：1979-10-02

申请号：US911959

申请日：1978-06-01

申请人： Henry Lerat

发明人： Henry Lerat

IPC分类号： C02F20060101 ,  C02F1/00 ,  C02F1/44 ,  B01D13/00 ,  C02B1/82

CPC分类号： B01D65/08 ,  B01D61/025 ,  B01D2311/02 ,  B01D2313/90 ,  B01D2321/02 ,  B01D2321/04

摘要： Sea water is purified by reverse osmosis in an offshore installation wherein sea water is withdrawn from the sea by a low pressure pump and passed through plural-stage physical filters having decreasing degrees of porosity to remove suspended particles and colloids from the sea water. The thus filtered sea water is then fed by a high pressure pump, at a controlled pressure above the osmotic pressure of the sea water to a reverse osmosis module, wherein a portion of the sea water permeates through a semi-permeable membrane of the module to form purified potable water, and wherein the remaining sea water, having the dissolved salt concentration thereof increased, is discharged back to the sea. The reverse osmosis module is operated such that the conversion level, measured in percent and equal to the volume of purified water divided by the volume of sea water fed to the module, is maintained below a maximum value to prevent the formation on the semi-permeable membrane of the module of sulfates and carbonates.

摘要翻译： 海水通过海上设施的反渗透净化，其中通过低压泵从海中抽出海水，并通过具有降低孔隙率的多级物理过滤器以从海水中除去悬浮颗粒和胶体。 然后将如此过滤的海水通过高压泵在高于海水的渗透压的受控压力下进料到反渗透模块，其中一部分海水渗透通过模块的半透膜， 形成纯净的饮用水，并且其中溶解盐浓度增加的剩余海水被排放回海。 操作反渗透模块，使得按照百分比测量并等于净化水体积的转化水平除以供给模块的海水的体积被保持在最大值以下，以防止在半渗透 硫酸盐和碳酸盐模块的膜。