Abstract
A plant for separation of the natural gas with extraction of helium, ethane, and the C{sub 3+H} fraction is described. The plant may also operate with extraction of only hydrocarbons. In conducting the investigation, the methods of calculation of the phase equilibria and thermodynamic properties of the mixtures and systems of simulation of production operations were used. The C{sub 2+H} fraction is separated in two columns, the absorber and the demethanizer. The second function of the column is removal of CO{sub 2} from the gas supplied to the block for separation of helium. To the plant is supplied gas which has been previously processed in the gas field with a pressure of 6.5 MPa. The main flow of gas is cooled with propane to about -50{degrees}C and supplied to the separator. The separated gas is expanded in the centrifugal expander to a pressure of 2 MPa and delivered to the absorber. To the upper plate of the absorber is supplied compressed gas cleansed of CO{sub 2} on zeolites. The gas exiting from the absorber is supplied for separation of helium to the parallel current condensers and the steam stills. The gas leaves the separator with a helium content of aboutmore » 60%.« less
Published Version
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