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CN102713479A 从烃流除去氮以提供燃料气体流的方法和用于该方法的设备 无效 - 撤回

从烃流除去氮以提供燃料气体流的方法和用于该方法的设备
摘要：
从烃流(10)除去氮以提供燃料气体流(510)的方法和设备(1)。使烃流(10)至少部分液化并随后膨胀。在分馏塔(150)中将经膨胀的烃流(110)分馏以提供富氮烃流(160)和贫氮烃流(170)。在冷凝器(200)中通过在专用第一制冷剂回路(800)中循环的制冷剂进行冷却使富氮烃流(160)部分冷凝，并且将其进行相分离以提供除氮物流(260)和返回到分馏塔(150)的贫氮回流物流(270)。使贫氮烃流(170)部分气化和相分离以提供返回到分馏塔(150)的蒸气流(360)和经受过冷的液化贫氮烃流(370)。由过冷的贫氮烃流(410)产生燃料气体流(510)。
摘要（英）：

Method of, and apparatus (1) for, rejecting nitrogen from a hydrocarbon stream (10) to provide a fuel gas stream (510). A hydrocarbon stream (10) is at least partially liquefied and subsequently expanded. The expanded hydrocarbon stream (110) is fractionated in a fractionation column (150) to provide an nitrogen-rich hydrocarbon stream (160) and a nitrogen-lean hydrocarbon stream (170). The nitrogen-rich hydrocarbon stream (160) is partially condensed in a condenser (200) by cooling against a refrigerant circulated in a dedicated first refrigerant circuit (800), and phase-separated to provide a nitrogen-rejection stream (260) and a nitrogen-lean reflux stream (270) which is returned to the fractionation column (150).; The nitrogen-lean hydrocarbon stream (170) is partially vaporized and phase-separated to provide a vapour stream (360) that is returned to the fractionation column (150) and a liquefied nitrogen-lean hydrocarbon stream (370) that is subjected to sub- cooling. The fuel gas stream (510) is generated from the sub-cooled nitrogen-lean hydrocarbon stream (410).

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