Refrigeration – Processes – Circulating external gas
Patent
1979-07-20
1981-03-24
Yudkoff, Norman
Refrigeration
Processes
Circulating external gas
62 5, 62 23, 62 44, F25J 302
Patent
active
042577942
ABSTRACT:
A method of separating a gaseous hydrocarbon mixture residing in cooling same by stages, with the resulting liquid condensate composed of the olefins and methane with an admixture of hydrogen being withdrawn at each cooling stage, recovering a gaseous methane-hydrogen mixture with some admixed ethylene produced by demethanization in a demethanizer, and further cooling same, withdrawing the resulting liquid condensate adapted for use as a spraying means in the process of demethanization. Expanding the remaining gaseous methane-hydrogen mixture with the application of the vortex effect providing thereby a hot gasiform stream and a cold gasiform stream. Mixing said hot and cold gasiform streams and again expanding the resulting mixture with the application of vortex effect. Feeding the hot stream produced thereby countercurrently against the gaseous hydrocarbon mixture being separated, and a cold stream--upon having it previously having passed countercurrently against the gasiform methane-hydrogen ethylene mixture. An apparatus for implementing this method comprises a unit adapted for recovering the olefins and incorporating tubular heat exchangers associated with one another in series, coolers and separators, and a unit adapted for recovering a gasiform methane-hydrogen mixture with an admixture of ethylene and incorporating a demethanizer, a tubular condenser, a separator, and first and second vortex tubes, all of which are associated with one another. The liquid-containing sections of all of the separators of the unit for recovery of the olefins are associated with the demethanizer. The second vortex tube has its nozzle inlet associated directly with the hot end of the first vortex tube, and with its cold end--via a portion of the tubes of the tubular condenser. The second vortex tube has its hot end associated with the tubes of the tubular heat exchangers of the unit for recovery of the olefins, and its cold end--via the rest of the tubes of the tubular condenser.
REFERENCES:
patent: 3443388 (1969-05-01), Kramer et al.
patent: 3508413 (1970-04-01), Pryor
patent: 3775988 (1973-12-01), Fekete
Abdullaeva Farida S.
Koshkin Nikolai N.
Maljutin Gennady G.
Mishiev Ilyasaf I.
Novichkov Alexandr N.
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