Hydrocarbon gas processing
    4.
    发明授权
    Hydrocarbon gas processing 有权
    烃类气体加工

    公开(公告)号:US09021832B2

    公开(公告)日:2015-05-05

    申请号:US12979563

    申请日:2010-12-28

    Abstract: A process and an apparatus are disclosed for recovering ethane, ethylene, and heavier hydrocarbon components from a hydrocarbon gas stream. The stream is cooled, expanded to lower pressure, and supplied to a first fractionation tower at a mid-column feed position. A distillation liquid stream is withdrawn from the first fractionation tower below the feed position of the expanded stream, heated, and directed into a second fractionation tower that produces an overhead vapor stream and a bottom liquid stream. The overhead vapor stream is cooled to condense it, with a portion of the condensed stream directed to the second fractionation tower as its top feed and the remainder directed to the first fractionation tower at a lower column feed position. The bottom liquid stream from the second fractionation tower is cooled and directed to the first fractionation tower as its top feed.

    Abstract translation: 公开了从烃气流中回收乙烷,乙烯和较重烃组分的方法和装置。 将料流冷却,膨胀至较低压力,并在中间柱进料位置供应至第一分馏塔。 蒸馏液体流从第一分馏塔排出到膨胀物流的进料位置以下,被加热,并引导到产生顶部蒸汽流和底部液体物流的第二分馏塔中。 将塔顶蒸气物流冷却以使其冷凝,一部分冷凝物流作为其顶部进料引导至第二分馏塔,其余部分以较低塔进料位置引导至第一分馏塔。 将来自第二分馏塔的底部液体物流冷却并引导至第一分馏塔作为其顶部进料。

    Liquefied natural gas and hydrocarbon gas processing
    6.
    发明申请
    Liquefied natural gas and hydrocarbon gas processing 有权
    液化天然气和碳氢化合物气体加工

    公开(公告)号:US20100031700A1

    公开(公告)日:2010-02-11

    申请号:US12479061

    申请日:2009-06-05

    Abstract: A process and an apparatus for liquefying a portion of a natural gas stream are disclosed. The natural gas stream is cooled under pressure and divided into a first stream and a second stream. The first stream is cooled, expanded to an intermediate pressure, and supplied to a lower feed point on a distillation column. The second stream is expanded to the intermediate pressure and divided into two portions. One portion is cooled and then supplied to a mid-column feed point on the distillation column; the other portion is used to cool the first stream. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas, so that the overhead vapor from the distillation column contains essentially only methane and lighter components. This overhead vapor is cooled and condensed, and a portion of the condensed stream is supplied to a top feed point on the distillation column to serve as reflux. A second portion of the condensed stream is expanded to low pressure to form the liquefied natural gas stream.

    Abstract translation: 公开了一种用于液化天然气流的一部分的方法和装置。 将天然气流在压力下冷却并分成第一流和第二流。 将第一流冷却,膨胀至中间压力,并供给到蒸馏塔上的下进料点。 将第二流扩展到中间压力并分成两部分。 一部分被冷却,然后供应到蒸馏塔上的中间柱进料点; 另一部分用于冷却第一流。 来自该蒸馏塔的底部产物优选含有比甲烷重的任何烃的大部分,否则会降低液化天然气的纯度,使得来自蒸馏塔的塔顶蒸气基本上仅含有甲烷和较轻组分。 将该塔顶蒸气冷却并冷凝,并将一部分冷凝流供应至蒸馏塔上的顶部进料点,以作为回流。 冷凝流的第二部分膨胀到低压以形成液化的天然气流。

    Liquefied Natural Gas And Hydrocarbon Gas Processing
    10.
    发明申请
    Liquefied Natural Gas And Hydrocarbon Gas Processing 有权
    液化天然气和烃类气体加工

    公开(公告)号:US20120000246A9

    公开(公告)日:2012-01-05

    申请号:US12466669

    申请日:2009-05-15

    Abstract: 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.

    Abstract translation: 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。

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