FIELD: machine building.
SUBSTANCE: proposed method comprises feeding partially condensed raw stock flow 10 at pressure over 50 bar into first gas/fluid separator 2, separating said flow 10 in said first separator 2 into first steam flow 20 and first liquid flow 70, expanding first steam flow 20 to get partially condensed first steam flow 30, feeding the latter into second separator 4 to separate in into second steam flow 60 and second liquid flow 40, increasing the pressure of second liquid flow 40 to magnitude equal to, at least, 50 bar to produce compressed second liquid flow 50 and force it back into first separator 2. First liquid flow 70 is directed into r separator 7 made up of debutaniser 7 to produce third steam flow 80 and third liquid flow 90. Note here that third steam flow 80 is enriched with butane and low-boiling hydrocarbons compared with third liquid flow 90.
EFFECT: electric power savings.
14 cl, 2 dwg
