Low pressure distillation apparatus
AssigneeValuepace Limited
InventorsBrian H. Keane, Farhad Shafaghi, Colin W. Spencer
Life of this patent
Estimating the term…
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.
Claims7
A distillation apparatus in which a liquid is evaporated at sub-atmospheric pressures, comprising:
- a sealed evaporation chamber having a feed liquid inlet port, a concentrated liquid outlet port, and a vapor outlet port;
- a distillate chamber means for containing a distillate, a vapor treating means for receiving vapor from the evaporation chamber and condensing the vapor to release its latent heat of condensation directly to the distillate, said vapor treating means being located in said distillate chamber,
- a blow-down tank, a blow-down entrainment device situated within the blow-down tank, said concentrated liquid outlet port being in communication with said blow-down entrainment device.
Dependencies are inferred from the claim text.