| 摘要 |
PCT No. PCT/EP90/02081 Sec. 371 Date Aug. 6, 1991 Sec. 102(e) Date Aug. 6, 1991 PCT Filed Dec. 3, 1990 PCT Pub. No. WO91/08825 PCT Pub. Date Jun. 27, 1991.A device for continuously purifying the waste gases from a vacuum unit using a gas permeation membrane. Reduced equipment and operating costs are achieved with good separation performance, by using a single pump to both remove the waste gas stream from the vacuum unit and to create a pressure difference across the gas permeation membrane. The vacuum pump is disposed downstream from the vacuum unit and upstream from the gas permeation meambrane. In addition to being connected to the vacuum unit, the suction side of the vacuum pump is also connected to the permeate side of the gas permeation membrane.
|
