Apparatus and method for demethanization and method of...

F - Mech Eng,Light,Heat,Weapons – 25 – J

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F25J 3/02 (2006.01)

Patent

CA 2318589

Disclosed is an improved cryogenic demethanizer (20), for separating an inlet hydrocarbon gas having a mixture of hydrocarbon components into a residual lighter gas fraction (115) and a heavier liquid fraction (135). The fractionation column in the demethanizer (20) has a main body portion (95) and an upper portion (100) enlarged with respect to the main body portion (95). A packing which may be in the form of a plurality of contact trays, or random packing is located in the upper enlarged portion (100) of the column (20). The invention may be used to retrofit existing cryogenic demethanizers, or used in new installations.

L'invention concerne un déméthaniseur cryogénique amélioré (20) qui est destiné à séparer un gaz d'hydrocarbures entrant, qui comporte un mélange de composants hydrocarbonés, en une fraction gazeuse résiduelle légère (115) et une fraction liquide lourde (135). La colonne de fractionnement faisant partie du déméthaniseur (20) comprend une partie principale (95) et une partie supérieure (100), plus large que la partie principale (95). La partie supérieure élargie (100) de la colonne (20) comprend une garniture qui est constituée de plusieurs plateaux de contact ou a une forme arbitraire. L'invention peut servir à moderniser les déméthaniseurs cryogéniques existants ou à équiper de nouvelles installations.

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