METHOD AND APPARATUS FOR PRODUCING A LIQUEFIED NATURAL GAS STREAM
    9.
    发明申请
    METHOD AND APPARATUS FOR PRODUCING A LIQUEFIED NATURAL GAS STREAM 审中-公开
    用于生产液化天然气流的方法和装置

    公开(公告)号:WO2006061400A1

    公开(公告)日:2006-06-15

    申请号:PCT/EP2005/056561

    申请日:2005-12-07

    IPC分类号: C10G5/06 F25J3/02 F25J1/02

    摘要: Method and apparatus producing a LNG stream, wherein before liquefaction heavier hydrocarbon components are removed from a NG stream to be liquefied, the method at least comprising the steps of: providing a vaporous feed stream (1) of natural gas; feeding the feed stream (1) into a distillation column (10); drawing a bottom stream (17) and an overhead stream (16) from the distillation column (10); and liquefying at least a part of the overhead stream (16) thereby obtaining a LNG stream; wherein the step of feeding the feed stream (1) into the distillation column (10) comprises the sub steps of: splitting the feed stream (1) into first (3a) and second (3b) substreams; feeding the first substream (3a) into the distillation column (10) via a first feed point (7a), at a pressure not lower than the feed stream pressure minus a pressure drop brought about by the said splitting of the feed stream (1); cooling the second substream (3b); and feeding the cooled second substream (7) into the distillation column (10) at a second feed point (7b) overhead of the first feed point (7a).

    摘要翻译: 生产LNG流的方法和装置,其中在液化之前将较重的烃组分从NG液流中除去,所述方法至少包括以下步骤:提供天然气的蒸气进料流(1) 将进料流(1)进料到蒸馏塔(10)中; 从蒸馏塔(10)中抽出塔底物流(17)和塔顶物流(16); 并液化塔顶流(16)的至少一部分,从而获得LNG流; 其中将进料流(1)进料到蒸馏塔(10)中的步骤包括以下子步骤:将进料流(1)分成第一(3a)和第二(3b)子流; 通过第一进料点(7a)将第一分流(3a)进料到蒸馏塔(10)中,压力不低于进料流压力减去所述进料流(1)分裂引起的压降, ; 冷却第二子流(3b); 以及在所述第一进料点(7a)的顶部的第二进料点(7b)将所述冷却的第二子流(7)进料到所述蒸馏塔(10)中。

    TREATING OF A CRUDE CONTAINING NATURAL GAS
    10.
    发明申请
    TREATING OF A CRUDE CONTAINING NATURAL GAS 审中-公开
    处理含天然气的原料

    公开(公告)号:WO2003022958A1

    公开(公告)日:2003-03-20

    申请号:PCT/EP2002/010365

    申请日:2002-09-13

    IPC分类号: C10G7/00

    摘要: A process for treating a crude containing natural gas comprising supplying the crude to a stabilization unit (3) to obtain a gaseous stream and crude oil; supplying a compressed, gaseous stream at a low temperature to the bottom of a first column (47); partly condensing (53) the first gaseous overhead stream, returning (58) the liquid phase to the first column (47) and supplying (14) the methane-rich stream to a liquefaction plant; supplying an expanded bottom stream (60) at a low temperature to the top of a second column (65); removing from the top of the second column (65) a second gaseous overhead stream (67), and removing from the bottom of the second column (65) a liquid bottom stream; vaporizing (73) part of the bottom stream (69) and introducing the vapour into the bottom of the second column (65); and introducing the remainder of the bottom stream (75) into a crude oil stream at an appropriate point in or upstream of the stabilization unit (3), wherein the amount of heat removed from the first gaseous overhead stream is so adjusted that the concentration of C 5 + in the first gaseous overhead stream is below a predetermined value, and wherein the fraction of the liquid bottom stream from the second column (65) that is vaporized is so selected that the concentration of C 2 -in the liquid bottom stream is below a predetermined level.

    摘要翻译: 一种处理含粗天然气的方法,包括将粗品供应至稳定单元(3)以获得气流和原油; 在低温下向第一塔(47)的底部供应压缩的气流; 部分冷凝(53)第一气态塔顶物流,将液相返回(58)至第一塔(47),并将富含甲烷的物流(14)供应至液化装置; 将低温的膨胀底部流(60)供应到第二塔(65)的顶部; 从第二塔(65)的顶部除去第二气体塔顶物流(67),并从第二塔(65)的底部移除液体底部流; 蒸发(73)部分底部流(69)并将蒸汽引入第二塔(65)的底部; 并将底部物流(75)的剩余部分在稳定单元(3)的适当点或上游的原油流中引入,其中从第一气态塔顶馏出物流中除去的热量被调整为使得浓度 第一气态塔顶物流中的C5 +低于预定值,并且其中来自蒸发的来自第二塔(65)的液体底部流的分数被选择为使得液体底部流中的C2-浓度低于预定值 水平。