Liquefied natural gas and hydrocarbon gas processing
    5.
    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

    IPC分类号: F25J3/00

    摘要: 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.

    摘要翻译: 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
    8.
    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

    IPC分类号: F25J3/00

    摘要: 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 A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation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.

    摘要翻译: 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。

    Hydrocarbon Gas Processing
    9.
    发明申请
    Hydrocarbon Gas Processing 有权
    烃气处理

    公开(公告)号:US20110296867A1

    公开(公告)日:2011-12-08

    申请号:US13117242

    申请日:2011-05-27

    IPC分类号: F25J3/00

    摘要: A process and an apparatus are disclosed for removing carbon dioxide from a hydrocarbon gas stream. The gas stream is cooled, expanded to intermediate pressure, and supplied to a fractionation tower at a top column feed position. The tower overhead vapor stream is compressed to higher pressure and cooled to partially condense it, forming a condensed stream. The condensed stream is expanded to intermediate pressure, used to subcool a portion of the tower bottom liquid product, then supplied to the tower at a mid-column feed position. The subcooled portion of the tower bottom liquid product is expanded to lower pressure and used to cool the compressed overhead vapor stream. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower at a temperature whereby the major portion of the carbon dioxide is recovered in the tower bottom liquid product.

    摘要翻译: 公开了从烃气流中除去二氧化碳的方法和装置。 将气流冷却,膨胀至中间压力,并在顶部塔进料位置供应至分馏塔。 将塔顶塔顶蒸气流压缩至较高压力并冷却以部分地冷凝,形成冷凝流。 冷凝的液流膨胀到中间压力,用于过滤塔底液体产物的一部分,然后在中间塔进料位置供应到塔中。 将塔底液体产物的过冷部分膨胀至较低压力并用于冷却压缩的塔顶蒸汽流。 进入分馏塔的进料的量和温度对于将分馏塔的塔顶温度维持在塔底液体产物中回收大部分二氧化碳的温度是有效的。

    Hydrocarbon Gas Processing
    10.
    发明申请
    Hydrocarbon Gas Processing 审中-公开
    烃气处理

    公开(公告)号:US20110067441A1

    公开(公告)日:2011-03-24

    申请号:US12868993

    申请日:2010-08-26

    IPC分类号: F25J3/00

    摘要: A process for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it and is thereafter expanded to the fractionation tower pressure, heated, and supplied to the fractionation tower at an upper mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a mid-column feed position. A distillation vapor stream is withdrawn from the column above the feed point of the second stream and is then directed into heat exchange relation with the expanded cooled first stream and the tower overhead vapor stream to cool the distillation vapor stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation tower as its top feed. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower at a temperature whereby the major portion of the desired components is recovered.

    摘要翻译: 公开了从烃气流中回收乙烷,乙烯,丙烷,丙烯和较重烃组分的方法。 将流冷却并分成第一和第二流。 将第一流进一步冷却以基本上将其全部冷凝,然后将其膨胀至分馏塔的压力,加热,并在上中间塔进料位置供应至分馏塔。 将第二流扩张到塔压力,然后在中间列进料位置供给塔。 蒸馏蒸气流从第二料流的进料点上方的塔中取出,然后与膨化的冷却的第一料流和塔顶塔顶蒸气料流导热至热交换关系,以冷却蒸馏蒸汽流并冷凝至少一部分 它,形成一个冷凝的流。 冷凝流的至少一部分作为顶部进料被引导至分馏塔。 进入分馏塔的进料的量和温度对于将分馏塔的塔顶温度维持在所需组分的主要部分被回收的温度是有效的。