Verfahren und Vorrichtung zum Zerlegen von Gasgemischen in ihre Komponenten,申请号DE19681751045-传众专利搜索

Verfahren und Vorrichtung zum Zerlegen von Gasgemischen in ihre Komponenten

申请公布号：DE1751045(A1)

申请号：DE19681751045

申请日期：1968.03.26

申请公布日期：1970.10.29

申请人：

MCDONNELL DOUGLAS CORP.

发明人：DAVID YEAROUT,JAMES

分类号：F25J3/04

主分类号：F25J3/04

摘要：1,204,407. Cold separation of gas mixtures. McDONNELL DOUGLAS CORP. 27 March, 1968 [28 March, 1967], No. 14700/68. Heading F4P. In a two component gas mixture, e.g. air separation process utilizing at least two fractionating columns 37, 38, Fig. 2, in mutual heat exchange relation, heat is continuously added to the lower part of column 38 below the feed oxygen-rich air inlet 50 and is continuously withdrawn from the upper part of the column by overhead nitrogen having been withdrawn from column 37, a portion thereof compressed at 42 passed through an axially extending coil 62, thereby effecting differential distillation in column 38. The head of column 38 is further cooled by liquid oxygen withdrawn therefrom through a line 68, sub-cooled in a coil 70, expanded at a valve 74 and passed through a coil 78 after which the so-warmed oxygen together with gaseous nitrogen leaving coil 62 and effluent nitrogen from column 38 passes through exchanger 72, 30; product oxygen being compressed at 100. The nitrogen compressor 42 is driven by a turbine 92 which is itself driven by the remainder of the overhead nitrogen from column 37. Additional cooling of column 38 below the feed inlet 50 is provided by an external refrigerant, e.g. helium traversing a coil 66. In a modification, Fig. 4 (not shown), the upper coil 62 is dispensed with and the cold expanded nitrogen is fed directly into the column head. In a further modification for the separation of oxygen, nitrogen and argon the latter is separated in a column 134, Fig. 6, in thermal contact with the lower end of a main column 132 having its mid-portion in thermal contact with an initial column 130 to which feed air is fed at 129, overhead nitrogen withdrawn at 136, and oxygen-rid liquid withdrawn at 142 and expanded into column 132 as feed. Overhead nitrogen from column 130 having been compressed at 138 passes up an axial coil 158 in the base of column 134 to heat the same and also to heat the base of column 132 by transmission of heat therebetween. The so-cooled nitrogen is sub-cooled at 164 and a first portion is expanded at a valve 185 into the head of column 132, a second portion of the sub-cooled nitrogen is expanded at 187 into column 130, whilst a third portion is expanded at 178 into a coil 174 of crude argon condenser 170 having a product argon gas outlet 224. Pure liquid oxygen withdrawn from column 134 through a line 204 is sub-cooled at 206 and is expanded in valves 208, 208<SP>1</SP>, 208<SP>11</SP> into a vaporizing coil 210 which extends within both columns 130, 232 to cool them, after which pure oxygen vapour is discharged as product through a heat exchanger coil 214 and a compressor 222.