New System Lowers Costs Of Seawater Desalination
In early 2013 the Frankenthal-based pump and valve manufacturer KSB will launch its new compact unit for reverse osmosis seawater desalination. The
Three functions are fulfilled by one and the same unit: creating high pressure, compensating pressure losses and recovering energy. There is no need for a separate booster pump. The entire system runs on a single electric motor and frequency inverter.
Compared to conventional energy recovery systems with pressure exchangers or Pelton turbines, this design saves up to 50 % in energy costs.
Fluctuating salt contents in the seawater to be processed can be responded to by means of the integrated control system. In recent tests the new compact unit desalinated one cubic metre of seawater with a salt content of 35,000 ppm at a power input of approximately two kilowatts per hour.
As no piping is required between the individual components, the new system takes up minimal space, which makes it ideal for use in mobile container units. KSB is the first manufacturer to supply this type of compact system for the RO process. Field tests have been underway at various Middle Eastern sites since October 2012.
RO systems have become well established in seawater desalination and will continue to grow in popularity. This purely mechanical desalination process works independently of any heat sources, unlike evaporation methods. The investment costs are considerably lower than those of thermal systems. Standardised system designs minimise installation times and enable straightforward operation and service.