Patent ID: 6494938
Filing Date: 2002-12-17
Classification: B01D,G01N

Abstract:
A flow-through vacuum degassing unit for degassing one or more liquids comprising:a vacuum chamber adapted to be connected to a source for creating a vacuum in the chamber; inlet and outlet connections for admitting and discharging liquid to be degassed; a continuous tube for conducting the liquid through the chamber, the tube being connected between the inlet and the outlet connection and the tube being formed of a polymeric material permeable to pass dissolved gases therethrough but liquid impermeable; and control means for operating a two stage, series pump for creating a vacuum in the chamber responsive to a sensed vacuum level in the chamber, wherein a second stage of said pump is continuously vented through a sintered metal plug, with said control means being designed to operate said vacuum source at a relatively rapid rate during initial pump down, and being further adapted to operate said vacuum source at a substantially steady but lower rate after a desired level of vacuum has been achieved.