Abstract: The sea water desalination technology includes the distillation method and the reverse osmosis method. The application of low temperature multieffective distillation technology in Tianjin Beijiang Power Plant was introduced. The features of sea water desalination technology were analyzed. The operation and control mode of sea water desalination system were discoursed. The performance parameters and guaranteed value of the sea water desalinating equipment were given.

Key words: sea water desalination technology, sea water desalinating equipment, low temperature multi-effective distillation, sea water reverse osmosis, performance parameters