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    Method for liquefaction of natural gas
    2.
    发明授权
    Method for liquefaction of natural gas 失效
    天然气液化方法

    公开(公告)号：US5537827A

    公开(公告)日：1996-07-23

    申请号：US484398

    申请日：1995-06-07

    申请人： William R. Low ,  Clarence G. Houser ,  Douglas E. Yates ,  Donald L. Andress

    发明人： William R. Low ,  Clarence G. Houser ,  Douglas E. Yates ,  Donald L. Andress

    IPC分类号： F25J1/02 ,  F25J1/00

    CPC分类号： F25J1/0281 ,  F25J1/0022 ,  F25J1/0035 ,  F25J1/004 ,  F25J1/0042 ,  F25J1/0052 ,  F25J1/0057 ,  F25J1/021 ,  F25J2205/02 ,  F25J2220/62 ,  F25J2220/64 ,  F25J2240/40 ,  F25J2245/90 ,  F25J2290/62

    摘要： A process for the liquefaction of natural gas having a pressure above atmospheric pressure, is disclosed in which a feed gas is cooled to sequentially lower temperatures, by passing the gas through a plurality of cooling stages, in heat exchange with at least three refrigerants, until the gas is substantially completely condensed in the last of the cooling stages. The pressure of the feed gas is reduced to near atmospheric pressure during the cooling of the feed gas by the use of hydraulic expanders which extract work during pressure reduction. Additionally, pressure reduction of the refrigerants within the refrigerant cycles is performed by similar hydraulic expanders. The work extracted by said hydraulic expanders is used to provide power to the liquefaction process, such as by helping to power compressors or pumps used in the liquefaction process.

    摘要翻译： 公开了一种液化高于大气压的天然气的方法，其中通过使气体通过多个冷却级与至少三种制冷剂进行热交换而将进料气体冷却以依次降低温度，直至 气体在最后的冷却阶段基本上完全冷凝。 通过使用在压力降低过程中提取工作的液压膨胀器，在进料气体冷却期间，进料气体的压力降低到接近大气压。 此外，制冷剂循环中的制冷剂的减压由类似的液压膨胀器进行。 由液压膨胀器提取的工作用于为液化过程提供动力，例如通过帮助为液化过程中使用的压缩机或泵提供动力。

    Conversion of normally gaseous material to liquefied product
    8.
    发明授权
    Conversion of normally gaseous material to liquefied product 有权
    将正常气态物质转化为液化产物

    公开(公告)号：US6158240A

    公开(公告)日：2000-12-12

    申请号：US177727

    申请日：1998-10-23

    申请人： William R. Low ,  Dunn M. Bailey

    发明人： William R. Low ,  Dunn M. Bailey

    IPC分类号： F25J1/02

    CPC分类号： F25J1/021 ,  F25J1/0022 ,  F25J1/004 ,  F25J1/0052 ,  F25J1/0085 ,  F25J1/0087 ,  F25J1/0263 ,  F25J2250/02

    摘要： The inventive process and associated apparatus are ideally suited for the small-scale liquefaction of natural gas. The current invention provides a methodology and apparatus for the liquefaction of normally gaseous material, most notably natural gas, which reduces both the number of process vessels required and also the associated space requirements over convention apparatus while resulting in only a slight decrease in process efficiency.

    摘要翻译： 本发明方法和相关设备理想地适用于天然气的小规模液化。 本发明提供了用于液化常规气态材料（最引人注目的天然气）的方法和装置，其减少了所需的工艺容器的数量以及相对于常规装置的空间需求，同时导致了工艺效率的轻微降低。

    Core-in-shell heat exchangers for multistage compressors
    9.
    发明授权
    Core-in-shell heat exchangers for multistage compressors 失效
    多级压缩机的核心换热器

    公开(公告)号：US5651270A

    公开(公告)日：1997-07-29

    申请号：US682463

    申请日：1996-07-17

    申请人： William R. Low ,  Kenneth C. Campbell

    发明人： William R. Low ,  Kenneth C. Campbell

    IPC分类号： F25J1/02 ,  F25J3/00 ,  F28F9/22 ,  F25J1/00

    CPC分类号： F28F9/22 ,  F25J1/0022 ,  F25J1/0082 ,  F25J1/0085 ,  F25J1/0087 ,  F25J1/0207 ,  F25J1/0244 ,  F25J1/0262 ,  F25J5/005 ,  F25J2250/02

    摘要： In multistage refrigeration compression, where liquid refrigerant withdraw from a core-in-shell type heat exchanger connected to a high compression stage is passed to a similar exchanger connected to a lower compression stage, liquid level stability in the higher compression stage exchanger is improved by providing an enlarged surge volume. A baffle plate transversing a lower portion of the shell divides the shell into a cooling zone that contains the cores, and a discharge zone that is part of the surge volume. The height of the baffle is selected to facilitate maintenance of at least a minimum functional liquid level in the shell. Liquid refrigerant withdraw from the discharge zone of the high-stage shell is supplied to the cooling zone of a shell connected to a lower compression stage. The liquid level in the shell is maintained by manipulating flow to liquid refrigerant that is flashed into the cooling zone of the higher compression stage shell. A refrigerant compressor may employ two or more compression stages, where the higher stage shells are typically much smaller than the lower stage shells, and the described scheme prevent major liquid level upsets in the shell of a higher stage resulting from minor liquid level upsets in the lower stage shells.

    摘要翻译： 在多级制冷压缩中，从连接到高压缩级的核壳式热交换器中退出的液态制冷剂被传递到与较低压缩级连接的类似的换热器，在较高压缩级交换器中的液位稳定性得到改善 提供增加的喘振量。 横跨壳体下部的挡板将壳体分成包含芯体的冷却区域，以及作为浪涌体积的一部分的排放区域。 选择挡板的高度以便于维持壳中的至少最小功能液位。 从高级壳体的排放区域排出的液体制冷剂被供给到连接到较低压缩级的壳体的冷却区域。 通过操纵流入冷却到较高压缩级壳体的冷却区域内的液体制冷剂来维持壳体中的液位。 制冷剂压缩机可以采用两个或多个压缩级，其中较高级壳通常比下级壳小得多，并且所描述的方案防止在较高级的壳中的主要液位扰动，这是由于 较低级的炮弹。