| 摘要 |
The invention pertains to a method and a device for desalting water by reverse osmosis, particularly for desalting seawater, in which saltwater is introduced under a first pressure into a pressure-compensation device and conducted fro m the pressure-compensation device at a second, higher pressure into a membrane module, wherein desalted water and concentrated saltwater are conducted out of the membrane module, wherein the concentrated saltwater conducted out of the membrane module is continuously introduced at roughly the second pressure into the pressure- compensation device and used there to apply roughly the second pressure to saltwater introduced into the pressure-compensation device and to introduce saltwater into the membran e module, and wherein the introduction of concentrated saltwater into the pressure-compensation device and the conduction of concentrated saltwater out of the pressure- compensation device are accomplished by means of controlled main valves. 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 arranged in parallel with the main valves are controll ed such that load peaks during opening and/or closing of the main valves are reduced.</SD OAB> |
