| 摘要 |
The invention relates to reverse osmosis plants for desalting sea water. The inventive plant comprises a desalting membrane unit (6), a control unit and modules which are used for supplying water at a high pressure and each of which comprises a diaphragm pump (3), an oil hydraulic drive (7), a device for increasing a brine pressure (10) and a brine distributer (8). The internal cavity of the diaphragm pump is divided by flexible diaphragms into three insulated sections. The central section (A) is designed in such a way that salt water is supplied thereto and exits therefrom to the desalting membrane unit at a pressure higher than the osmotic pressure. The side section (B) is connected to the oil hydraulic drive (7) by cyclically supplying oil at a pressure higher than the osmotic pressure, and the side section (C) is connected to the brine distributer (8) which is connected to the brine output (11) from the desalting membrane unit (6). In the second design of the plant, the section (C) of the diaphragm pump comprises an additional diaphragm and a hydraulic multiplier (15) in the form of a device for increasing a brine pressure. Said invention makes it possible to increase the operating reliability of the freshwater plant and to simplify the structural design and the use thereof. |
