Twin reflux process and configurations for improved natural...

Details Twin reflux process and configurations for improved natural... Twin reflux process and configurations for improved natural...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/02 (2006.01)

Patent

CA 2484085

A two-column NGL recovery plant includes an absorber (110) and a distillation column (140) in which the absorber (110) receives two cooled reflux streams, wherein one reflux stream (107) comprises a vapor portion of the NGL and wherein the other reflux stream (146) comprises a lean reflux provided by the overhead (144) of the distillation column (140). Contemplated configurations are especially advantageous in a upgrade of an existing NGL plant and typically exhibit C3 recovery of at least 99% and C2 recovery of at least 90%.

L'invention concerne une usine de récupération de liquides gazeux naturels (NGL) à deux colonnes comprenant un absorbeur (110) et une colonne de distillation (140) dans laquelle ledit absorbeur (110) reçoit deux flux de reflux refroidis. Un flux de reflux (107) comprend une partie de vapeur de NGL, l'autre flux de reflux (146) comprenant un reflux à faible teneur fourni par le distillat de tête (144) de la colonne de distillation (140). Les configurations envisagées sont particulièrement avantageuses pour moderniser une usine de récupération de NGL existante et récupérant généralement au moins 99 % de C¿3? et au moins 90 % de C2.

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