| 摘要 |
<p>1,033,250. Cold separation of gas mixtures. LINDE A.G. Dec. 14, 1964 [Dec. 13, 1963], No. 50884/64. Heading F4P. Re-vaporization of the greater portion of a condensible constituent, e.g. carbon dioxide of a compressed gas mixture, e.g. flue gas deposited during the first period of a three-cycle reversible heat exchanger system 32, 39, 35, Fig. 2 (not shown), is effected solely by the application of vacuum during the second period of the cycle and the so-purified gas mixture is re-warmed during the third period. In operation, flue gas at 2.5 amtospheres pressure is fed from a line 31 through a regenerator 32 and is then expanded to 1À1 atoms. pressure in a turbine 34 and passed through regenerator 35 during the third period thereof and discharged through a line 36 as product; a portion being recompressed at 37 and used to regulate the temperature of the feed gas entering turbine 34. Prior to connecting regenerator 39 to a vacuum pump 41 the pressure is allowed to fall to atmospheric for about 5 seconds, during which time purified mixture is fed through a line 40 to the outlet line of turbine 34. In a modification a plurality of components having different dew points, e.g. hydrocyanic acid, hydrogen sulphide and ethylene are condensed from coke oven gas during the cooling period in three regenerators in series but during the vacuum period each regenerator is emptied separately through its warm end.</p> |
