Patents Assigned to Valuepace Limited
  • Patent number: 5108548
    Abstract: A low pressure distillation apparatus in which evaporation takes place at sub-atmospheric pressures. An evaporation chamber has a feed liquid inlet port, a concentrated liquid outlet port, and a vapor outlet port. The vapor outlet port is in communication with a vapor treating device immersed in distillate in a distillate chamber. The preferred vapor treating device is a rotating impeller pump which reduces the pressure in the evaporation chamber to a working pressure, draws off vapor boiled from the liquid in the evaporation chamber, entrains the vapor in a stream of distillate, and condenses the vapor in the stream of distillate to transfer the latent heat of condensation of the vapor directly to the distillate.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: April 28, 1992
    Assignee: Valuepace Limited
    Inventors: Brian H. Keane, Farhad Shafaghi, Colin W. Spencer