| 摘要 |
The invention pertains to a method and a device for desalting water by reverse osmosis, particularly for desalting seawater, in which saltwater (10) is introduced under a first pressure (p1) into a pressure-compensation device (2) and conducted from pressure-compensation device (2) at a second, higher pressure (P2) into a membrane module (3), wherein desalted water (12) and concentrated saltwater (13) are conducted out of membrane module (3), wherein the concentrated saltwater (13) conducted out of membrane module (3) is continuously introduced at roughly second pressure (P2) into pressure-compensation device (2) and used there to apply roughly second pressure (P2) to saltwater (10) introduced into pressure-compensation device (2) and to introduce saltwater (11) into membrane module (3), and wherein the introduction of concentrated saltwater (13) into pressure-compensation device (2) and the conduction of concentrated saltwater (14) out of pressure-compensation device (2) are accomplished by means of controlled main valves (V1,V3,V4,V6). The main valves are subject to high mechanical stresses, particularly during the opening and closing of the valves. To reduce or avoid these, it is provided according to the invention that secondary valves (V2,V2',V5,V5') arranged in parallel with main valves (V1,V3,V4,V6) are controlled such that load peaks during opening and/or closing of main valves (V1,V3,V4,V6) are reduced. The invention relates to a method and a device for desalting water with the 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 fed 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 tho 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 compens |
