Mixed refrigerant/expander process for the recovery of C3+ hydrocarbons
    1.
    发明授权
    Mixed refrigerant/expander process for the recovery of C3+ hydrocarbons 失效
    用于C3 +烃回收的混合制冷剂/膨胀器方法

    公开(公告)号:US4921514A

    公开(公告)日:1990-05-01

    申请号:US351732

    申请日:1989-05-15

    IPC分类号: C07C7/04 F25J3/02

    摘要: The present invention is an energy efficient process for the recovery and purification of C.sub.3.sup.+ hydrocarbons from a high pressure natural gas or refinery/petrochemical feed gas containing C.sub.3.sup.+ hydrocarbons and light gases. In the process, the high pressure feed gas is initially cooled by heat exchange with a multi-component refrigerant fluid circulating in a closed-loop cycle thereby condensing a large portion of the C.sub.3.sup.+ hydrocarbons. The non-condensed, remaining gas is work expanded to an intermediate pressure thus providing refrigeration for condensing the remaining C.sub.3.sup.+ hydrocarbons. The condensed C.sub.3.sup.+ hydrocarbon liquid streams are combined and are further purified by distillation in an integrated distillation column. Optically, refrigeration for refluxing the integrated distillation column can be provided by the mixed refrigerant cycle.

    摘要翻译: 本发明是用于从含有C3 +烃和轻质气体的高压天然气或炼油/石油化工原料气中回收和纯化C3 +烃的能量方法。 在此过程中,高压进料气体首先通过与在闭环循环中循环的多组分制冷剂流体进行热交换而冷却,从而冷凝大部分的C3 +烃。 未冷凝的剩余气体工作膨胀到中间压力,从而提供用于冷凝剩余的C3 +烃的制冷。 将冷凝的C3 +烃液体流合并,并通过在一体化蒸馏塔中蒸馏进一步纯化。 在光学上,通过混合制冷剂循环可以提供用于回流一体化蒸馏塔的制冷。

    Air separation process with modified single distillation column nitrogen
generator
    2.
    发明授权
    Air separation process with modified single distillation column nitrogen generator 失效
    空气分离工艺用改性单蒸馏塔氮气发生器

    公开(公告)号:US4783210A

    公开(公告)日:1988-11-08

    申请号:US132534

    申请日:1987-12-14

    IPC分类号: F25J3/04 F25J3/02

    摘要: The present invention relates to a process to produce large quantities of pure nitrogen and small amounts of high purity oxygen co-product which utilizes a modified single distillation column nitrogen generator. The modification is the addition of a small second column which purifies a portion of the oxygen enriched liquid from the nitrogen generator overhead condenser. Reboiling for the second column is provided by condensing part of the nitrogen overhead from the nitrogen generator. This condensed nitrogen is used as reflux in the nitrogen generator.

    摘要翻译: 本发明涉及一种生产大量纯氮和少量高纯氧共同产物的方法,该方法利用改进的单蒸馏塔氮气发生器。 该修改是添加小的第二柱,其从氮气发生器塔顶冷凝器中净化一部分富氧液体。 通过将来自氮气发生器的部分氮塔顶部冷凝来提供第二塔的再沸腾。 这种冷凝氮在氮气发生器中用作回流。

    Cryogenic nitrogen generator with nitrogen expander
    5.
    发明授权
    Cryogenic nitrogen generator with nitrogen expander 失效
    带氮气膨胀机的低温氮气发生器

    公开(公告)号:US4834785A

    公开(公告)日:1989-05-30

    申请号:US209460

    申请日:1988-06-20

    申请人: Calvin L. Ayres

    发明人: Calvin L. Ayres

    IPC分类号: F25J3/04

    摘要: The present invention is an improvement to a conventional, single column, cryogenic, nitrogen generator which is able to produce nitrogen at near atmospheric pressure. In the improvement, the product nitrogen from the rectifier column is expanded through an expansion turbine to produce refrigeration for the process. Expanding the nitrogen makes it possible for the main air compressor to operate at a much lower pressure and achieve a significant reduction in compression power as compared to conventional waste expander and air expander cycles.

    摘要翻译: 本发明是对常规的单塔,低温氮气发生器的改进,其能够在接近大气压下产生氮气。 在改进中,来自整流柱的产品氮通过膨胀涡轮膨胀以产生该过程的制冷。 扩大氮气使得主空气压缩机能够在低得多的压力下运行,并且与传统的废物膨胀器和空气扩张器循环相比,可以显着降低压缩功率。