Gas mixture-separating device

摘要

A gas mixture-separating device which comprises a first separation cell provided with a first membrane; a second separation cell provided with a second membrane; a feed pipe for conducting a gas mixture being separated to the high pressure chambers of the first and second separation cells; a first discharge pipe for drawing off from the first separation cell either of the gas portions which have permeated the first membrane and that which has not permeated said first membrane; a first feedback pipe for returning the other gas portion to said feed pipe; a second discharge pipe for drawing off from the second separation cell either of the gas portions which have permeated the second membrane and that which has not permeated said second membrane; and a second feedback pipe for returning the other gas portion to said feed pipe.