F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/02 (2006.01) F25J 1/02 (2006.01)
Patent
CA 2739696
The method of the invention includes cooling an inlet stream (72) within an upstream heat exchanger (28). The method includes feeding the cooled inlet stream (76) into a fractioning column (50) and collecting the denitrogenated hydrocarbon stream at the bottom of the column (50). The method includes feeding a nitrogen-rich stream (106) from the head of the column (50) into a disengager (60) and collecting the gaseous head stream from the disengager (60) in order to form the helium-rich stream (20). The liquid stream (110) from the base of the first disengager (60) is separated into a liquid nitrogen stream (18) and into a first reflux stream (114) that is fed as a reflux into the head of the fractioning column (50).
Ce procédé comprend le refroidissement d'un courant d'introduction (72) au sein d'un échangeur thermique amont (28). Il comprend l'introduction du courant d'introduction refroidi (76) dans une colonne de fractionnement (50) et le prélèvement au fond de la colonne (50) du courant d'hydrocarbures déazoté. Il comprend l'introduction d'un courant riche en azote (106) provenant de la tête de la colonne (50) dans un ballon séparateur (60) et la récupération du courant de tête gazeux issu du ballon séparateur (60) pour former le courant riche en hélium (20). Le courant liquide (110) issu du pied du premier ballon séparateur (60) et est séparé en un courant d'azote liquide (18) et en un premier courant de reflux (114) introduit en reflux dans la tête de la colonne de fractionnement (50).
Paradowski Henri
Vovard Sylvain
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Technip France
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