| 摘要 |
The invention relates to a method and a device for desalting water with reverse osmosis, especially for desalting seawater. According to said method, the saltwater (10) is fed into a pressure compensation device (2) at a first pressure (p1) and is then led from said pressure compensation device (2) into a membrane module (3) at a second, higher pressure (p2). Desalted water (12) and concentrated saltwater (13) are guided out of the membrane module (3) and the concentrated saltwater (13) from the membrane module (3) is continuously fed into the pressure compensation device at approximately the second pressure (p2). Here, said concentrated saltwater is used to subject the saltwater (10) that is fed into the pressure compensation device (2) to approximately the second pressure (p2) and to feed the saltwater (11) into the membrane module (3). The introduction of the concentrated saltwater (13) into the pressure compensation device (2) and the guiding of the concentrated saltwater (14) out of the pressure compensation device (2) takes place by means of controlled main valves (V1, V3, V4, V6). Said main valves are subjected to a considerable mechanical load, especially during opening and closing. In order to reduce or avoid this, the invention provides that secondary valves (V2, V2', V5, V5') that are situated parallel to the main valves (V1, V3, V4, V6) are controlled in such a way that the load peaks are reduced for opening and/or closing the main valves (V1, V3, V4, V6).
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