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    • 3. 发明申请
    • Gas Conditioning Method and Apparatus for the Recovery of LPG/NGL(C2+) From LNG
    • 用于从LNG回收LPG / NGL(C2 +)的气体调节方法和装置
    • US20080083246A1
    • 2008-04-10
    • US11868155
    • 2007-10-05
    • Kamal SHAHGirish JOSHI
    • Kamal SHAHGirish JOSHI
    • F25J3/00
    • F25J3/0233F25J3/0214F25J3/0238F25J3/0242F25J2200/02F25J2200/70F25J2200/76F25J2230/08F25J2240/02F25J2245/02
    • A method and apparatus for conditioning imported liquefied natural gas to conform to a particular pipeline heating value specification and recovery of liquefied petroleum gas or natural gas liquids from liquefied natural gas are disclosed. An input stream containing liquefied natural gas is split into a direct stream and a bypass stream. The direct stream is heated in a cross-exchanger to produce a heated rich liquefied natural gas stream, which is split into a primary column feed and a secondary column feed. At least a major portion of the secondary column feed is vaporized to produce a vaporized secondary column feed, which is expanded in an expander to produce a vaporized and expanded secondary column feed. A top feed, the primary column feed, and the vaporized and expanded secondary column feed are fractionated to produce an overhead product stream and a bottom product stream. The overhead product stream is compressed in a compressor coupled to the expander. At least a major portion of the compressed overhead product stream is condensed by cooling in the cross-exchanger to produce a compressed and condensed overhead product stream. A reflux stream of at least one of the compressed and condensed overhead product stream or an output stream is directed to a top of the fractionation unit as the top feed. The bypass stream is mixed with a balance stream of the compressed and condensed overhead product stream to produce the output stream, which is vaporized to produce a conditioned natural gas product.
    • 公开了一种用于调节进口液化天然气以符合特定管道热值规范以及从液化天然气回收液化石油气或天然气液体的方法和装置。 包含液化天然气的输入流被分成直流和旁路流。 直接流在交叉交换器中加热以产生加热的富液化天然气流,其被分成主柱进料和第二塔进料。 第二柱进料的至少主要部分被蒸发以产生蒸发的第二塔进料,其在膨胀器中膨胀以产生蒸发和膨胀的二次塔进料。 将顶部进料,主塔进料和蒸发和膨化的第二塔进料分馏以产生塔顶产物流和底部产物流。 塔顶产品流在与膨胀机相连的压缩机中被压缩。 压缩塔顶产物流的至少大部分通过在交换器中的冷却而冷凝以产生压缩和冷凝的塔顶产物流。 压缩和冷凝的塔顶产物流或输出流中的至少一个的回流被引导到分馏单元的顶部作为顶部进料。 旁路流与压缩和冷凝塔顶产物流的平衡流混合以产生输出流,其被蒸发以产生调节天然气产物。
    • 10. 发明授权
    • Gas conditioning method and apparatus for the recovery of LPG/NGL(C2+) from LNG
    • 用于从LNG回收LPG / NGL(C2 +)的气体调节方法和装置
    • US08499581B2
    • 2013-08-06
    • US11868155
    • 2007-10-05
    • Kamal ShahGirish Joshi
    • Kamal ShahGirish Joshi
    • F25J3/00
    • F25J3/0233F25J3/0214F25J3/0238F25J3/0242F25J2200/02F25J2200/70F25J2200/76F25J2230/08F25J2240/02F25J2245/02
    • A method and apparatus for conditioning imported liquefied natural gas to conform to a particular pipeline heating value specification and recovery of liquefied petroleum gas or natural gas liquids from liquefied natural gas are disclosed. An input stream containing liquefied natural gas is split into a direct stream and a bypass stream. The direct stream is heated in a cross-exchanger to produce a heated rich liquefied natural gas stream, which is split into a primary column feed and a secondary column feed. At least a major portion of the secondary column feed is vaporized to produce a vaporized secondary column feed, which is expanded in an expander to produce a vaporized and expanded secondary column feed. A top feed, the primary column feed, and the vaporized and expanded secondary column feed are fractionated to produce an overhead product stream and a bottom product stream. The overhead product stream is compressed in a compressor coupled to the expander. At least a major portion of the compressed overhead product stream is condensed by cooling in the cross-exchanger to produce a compressed and condensed overhead product stream. A reflux stream of at least one of the compressed and condensed overhead product stream or an output stream is directed to a top of the fractionation unit as the top feed. The bypass stream is mixed with a balance stream of the compressed and condensed overhead product stream to produce the output stream, which is vaporized to produce a conditioned natural gas product.
    • 公开了一种用于调节进口液化天然气以符合特定管道热值规范以及从液化天然气回收液化石油气或天然气液体的方法和装置。 包含液化天然气的输入流被分成直流和旁路流。 直接流在交叉交换器中加热以产生加热的富液化天然气流,其被分成主柱进料和第二塔进料。 第二柱进料的至少主要部分被蒸发以产生蒸发的第二塔进料,其在膨胀器中膨胀以产生蒸发和膨胀的二次塔进料。 将顶部进料,主塔进料和蒸发和膨化的第二塔进料分馏以产生塔顶产物流和底部产物流。 塔顶产品流在与膨胀机相连的压缩机中被压缩。 压缩塔顶产物流的至少大部分通过在交换器中的冷却而冷凝以产生压缩和冷凝的塔顶产物流。 压缩和冷凝的塔顶产物流或输出流中的至少一个的回流被引导到分馏单元的顶部作为顶部进料。 旁路流与压缩和冷凝塔顶产物流的平衡流混合以产生输出流,其被蒸发以产生调节天然气产物。