Siloxane removal system
AssigneePioneer Air Systems, Inc.
InventorsSanjiv K. Basseen, Rame Sulaiman
Life of this patent
Estimating the term…
Abstract
A method and apparatus for continuously removing siloxanes and H2O from a waste gas stream containing H2O and siloxanes includes cooling the waste gas stream in a primary heat exchanger to a temperature of greater than 2° F. to condense a portion of the H2O from the waste gas stream, chilling the waste gas stream in a first gas-refrigerant heat exchanger to a temperature of about −20° F. to condense the siloxanes and freeze the H2O and then directing the cooled waste gas stream from the primary heat exchanger to a second gas-refrigerant heat exchanger while the first gas-refrigerant heat exchanger is defrosted to remove frozen H2O and siloxanes.
Claims10
An apparatus for removing H2O and siloxanes from a waste gas stream containing H2O and siloxanes, said apparatus comprising:
- a source of waste gas containing H2O and siloxanes,
- a primary heat exchanger,
- a first conduit providing flow communication for said waste gas from said source to said primary heat exchanger,
- a first gas-refrigerant heat exchanger,
- a second conduit providing flow communication for said waste gas from said primary heat exchanger to said first gas-refrigerant heat exchanger,
- a second gas-refrigerant heat exchanger,
- a third conduit providing flow communication for said waste gas from said primary heat exchanger to said second gas-refrigerant heat exchanger, and
- a valve for alternating the flow of said waste gas stream between said second conduit and said third conduit.
A method of removing siloxanes from a waste gas stream containing H2O and siloxanes comprising:
- cooling said waste gas stream in a primary heat exchanger to a temperature above 32° F. to condense a portion of said H2O from said waste gas stream,
- chilling said waste gas stream in a first gas-refrigerant heat exchanger to a temperature of about −20° F. to condense said siloxanes and freeze H2O, and
- directing said cooled waste gas stream to a second gas-refrigerant heat exchanger while said first gas-refrigerant heat exchanger is defrosted to remove frozen H2O.
Dependencies are inferred from the claim text.