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公开(公告)号:US07127914B2
公开(公告)日:2006-10-31
申请号:US10664336
申请日:2003-09-17
CPC分类号: F25J1/0072 , F25J1/0022 , F25J1/005 , F25J1/0052 , F25J1/0097 , F25J1/0217 , F25J1/0218 , F25J1/0267 , F25J1/0268 , F25J1/0274 , F25J1/0291 , F25J1/0292 , F25J2220/62 , F25J2220/64 , F25J2245/02 , F25J2270/16
摘要: Method for gas liquefaction comprising cooling a feed gas by a first refrigeration system in a first heat exchange zone and withdrawing a substantially liquefied stream therefrom, further cooling the substantially liquefied stream by indirect heat exchange with one or more work-expanded refrigerant streams in a second heat exchange zone, and withdrawing therefrom a further cooled, substantially liquefied stream. At least one of the one or more work-expanded refrigerant streams is provided by compressing one or more refrigerant gases to provide a compressed refrigerant stream, cooling all or a portion of the compressed refrigerant stream in a third heat exchange zone to provide a cooled, compressed refrigerant stream, and work expanding the cooled, compressed refrigerant stream to provide one of the one or more work-expanded refrigerant streams. The flow rate of a work-expanded refrigerant stream in the second heat exchange zone typically is less than the total flow rate of one or more work-expanded refrigerant streams in the third heat exchange zone.
摘要翻译: 用于气体液化的方法,包括通过第一热交换区域中的第一制冷系统冷却进料气体并从其中排出基本上液化的物流,通过在一秒钟内与一个或多个工作膨胀的制冷剂流间接热交换进一步冷却基本上液化的流 热交换区,并从其中抽出进一步冷却的基本上液化的物流。 一个或多个工作膨胀的制冷剂流中的至少一个通过压缩一个或多个制冷剂气体以提供压缩的制冷剂流来提供,在第三热交换区域中冷却压缩的制冷剂流的全部或一部分,以提供冷却的, 压缩的制冷剂流,并且对冷却的压缩的制冷剂流进行扩展,以提供一个或多个工作膨胀的制冷剂流中的一个。 第二热交换区中的工作膨胀的制冷剂流的流量通常小于第三热交换区中的一个或多个工作膨胀的制冷剂流的总流量。
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公开(公告)号:US07520143B2
公开(公告)日:2009-04-21
申请号:US11409432
申请日:2006-04-21
IPC分类号: F25J3/00
CPC分类号: F25J3/029 , F25J1/0015 , F25J1/0022 , F25J1/0037 , F25J1/0042 , F25J1/0052 , F25J1/0055 , F25J1/0072 , F25J1/0214 , F25J1/0216 , F25J1/0218 , F25J1/023 , F25J1/0264 , F25J1/0267 , F25J1/0283 , F25J1/0292 , F25J3/0209 , F25J3/0233 , F25J3/0257 , F25J2200/02 , F25J2200/50 , F25J2200/72 , F25J2205/02 , F25J2210/06 , F25J2215/04 , F25J2220/64 , F25J2240/30 , F25J2270/04 , Y10S62/927
摘要: Nitrogen is removed from a liquefied natural gas feed (41) by a two stage separation in which the liquefied natural gas (41) is first fractionated (23) to provide a first nitrogen-enriched overhead vapour stream (46) and a nitrogen-containing bottoms liquid stream (19) and then at least a portion of said bottoms liquid stream (19) is fractionated (25) to provide a second nitrogen-enriched overhead vapour stream (36) that is of lower purity than said first overhead vapour stream (46) and a purified liquefied natural gas stream (50). The first fractionation is conducted in a distillation column (23) refluxed (45) with nitrogen overhead (43) condensed in a condenser (24) located in a flash drum (25) in which the second fractionation is conducted. The second nitrogen-enriched overhead vapour stream (36) provides fuel gas for use in the natural gas liquefaction plant.
摘要翻译: 通过两级分离从液化天然气进料(41)中除去氮气,其中液化天然气(41)首先被分馏(23),以提供第一富氮塔顶蒸汽流(46)和含氮的 底部液体流(19),然后至少部分所述底部液体流(19)被分馏(25)以提供第二富氮塔顶蒸气流(36),其比所述第一塔顶蒸气流的纯度低 46)和纯化的液化天然气流(50)。 在蒸馏塔(23)中进行第一次分馏,在蒸馏塔(45)中,氮气顶部(43)在位于其中进行第二次分馏的闪蒸筒(25)中的冷凝器(24)中冷凝。 第二富氮塔顶蒸汽流(36)提供用于天然气液化装置的燃料气体。
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公开(公告)号:US06978638B2
公开(公告)日:2005-12-27
申请号:US10444029
申请日:2003-05-22
CPC分类号: C10L3/10 , F25J3/0209 , F25J3/0233 , F25J3/0257 , F25J2200/02 , F25J2200/50 , F25J2200/74 , F25J2200/76 , F25J2205/04 , F25J2215/04 , F25J2240/12 , F25J2240/30 , F25J2270/04 , F25J2270/08 , F25J2270/12 , F25J2270/14 , F25J2270/42 , Y10S62/927
摘要: Method for the rejection of nitrogen from condensed natural gas which comprises (a) introducing the condensed natural gas into a distillation column at a first location therein, withdrawing a nitrogen-enriched overhead vapor stream from the distillation column, and withdrawing a purified liquefied natural gas stream from the bottom of the column; (b) introducing a cold reflux stream into the distillation column at a second location above the first location, wherein the refrigeration to provide the cold reflux stream is obtained by compressing and work expanding a refrigerant stream comprising nitrogen; and (c) either (1) cooling the purified liquefied natural gas stream or cooling the condensed natural gas stream or (2) cooling both the purified liquefied natural gas stream and the condensed natural gas stream, wherein refrigeration for (1) or (2) is obtained by compressing and work expanding the refrigerant stream comprising nitrogen. The refrigerant stream may comprise all or a portion of the nitrogen-rich vapor stream from the distillation column.
摘要翻译: 从冷凝天然气中排除氮的方法,其包括:(a)在其第一位置将冷凝的天然气引入蒸馏塔,从蒸馏塔中取出富氮塔顶馏出物流,并将纯化的液化天然气 从塔的底部流出; (b)在第一位置上方的第二位置将冷的回流物流引入蒸馏塔,其中通过压缩和加工包含氮气的制冷剂流来获得冷回流物流; (c)(1)冷却纯化的液化天然气流或冷却冷凝的天然气流,或(2)冷却纯化的液化天然气流和冷凝的天然气流,其中(1)或(2 )通过压缩和加工包含氮气的制冷剂流而工作获得。 制冷剂流可以包括来自蒸馏塔的全部或一部分富氮蒸气流。
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