| 摘要 |
779,184. Separation of gas mixtures. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Oct; 31, 1955 [Nov. 3, 1954], No. 31076/55. Class 8(2) A gas mixture, e.g. air fractionating apparatus, comprises a heat exchanger having a wall 37, Fig. 2, against which the air impinges and is partly condensed and which is cooled by a gas refrigerator 31 of the reversed hot gas engine kind. The heat exchanger of tubular form is surrounded by vanes 38 and a cylindrical casing 39 having an air inlet 43, an uncondensed nitrogen outlet 44 and a liquid oxygen discharge duct 41; the upper end of the tubular wall 37 being cooled by liquid nitrogen forced by a pump 36 from adjacent the freezer of the gas refrigerator 31. In a modification the heat exchanger comprising a tube 16, Fig. 1, vanes 18 and an outer casing is located on top the refrigerator freezer 10. Air is supplied through a duct 19, uncondensed nitrogen is discharged through a duct 25 and crude liquid oxygen is led through a duct 27 to the head of a column 22 where it is further fractionated into nitrogen part of which is returned through a duct 29 to the air supply duct 19 and the remainder traverses a heat exchanger 24 where it cools incoming air. Liquid oxygen collects in the' boiler 21 and serves to further cool the incoming air.
|
