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    • 8. 发明申请
    • Liquefied Natural Gas And Hydrocarbon Gas Processing
    • 液化天然气和烃类气体加工
    • US20120000246A9
    • 2012-01-05
    • US12466669
    • 2009-05-15
    • Tony L. MartinezJohn D. WilkinsonHank M. HudsonKyle T. Cuellar
    • Tony L. MartinezJohn D. WilkinsonHank M. HudsonKyle T. Cuellar
    • F25J3/00
    • F25J3/0209F25J3/0214F25J3/0233F25J3/0238F25J2200/02F25J2200/38F25J2200/50F25J2200/78F25J2205/02F25J2205/04F25J2210/02F25J2210/62F25J2230/08F25J2230/60F25J2235/60F25J2240/02F25J2245/02F25J2270/904F25J2290/40
    • A process for the recovery of heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is heated to vaporize at least part of it, then expanded and supplied to a fractionation column at a first mid-column feed position. The gas stream is expanded and cooled, then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation vapor stream as it supplies at least part of the heating of the LNG feed stream. The distillation vapor stream is cooled sufficiently to condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation column as its top feed. A portion of the column overhead stream is also directed in heat exchange relation with the LNG feed stream, so that it also supplies at least part of the heating of the LNG feed stream as it is condensed to form a “lean” LNG stream. The quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered in the bottom liquid product from the column.
    • 公开了从液化天然气(LNG)流和烃气流中回收较重烃的方法。 加热LNG进料流至少部分蒸发,然后膨胀并在第一中间柱进料位置供应至分馏塔。 将气流膨胀并冷却,然后在第二中间柱进料位置供给塔。 蒸馏蒸气流从中间塔进料位置以下的分馏塔中排出,并与LNG进料流热交换,并蒸发蒸馏物流,至少部分加热LNG进料流。 将蒸馏蒸气流充分冷却以冷凝其至少一部分,形成冷凝流。 冷凝流的至少一部分作为其顶部进料被引导至分馏塔。 塔顶塔顶物流的一部分也与LNG进料流进行热交换,从而当LNG进料流被冷凝以形成“贫”LNG流时,其还提供LNG进料流的至少一部分加热。 进料到塔的数量和温度有效地将塔顶温度维持在一个温度,从而使所需组分的主要部分在塔的底部液体产物中回收。