Ethane extraction process for a hydrocarbon gas stream
    1.
    发明授权
    Ethane extraction process for a hydrocarbon gas stream 有权
    烃类气流的乙烷萃取方法

    公开(公告)号:US06755965B2

    公开(公告)日:2004-06-29

    申请号:US09839759

    申请日:2001-04-20

    IPC分类号: B01D300

    摘要: A process for ethane extraction from a gas stream based on turboexpansion and fractionation with no mechanical refrigeration is provided. The feed gas is sweetened and dehydrated by a conventional amine process and by a molecular sieve unit, to remove carbon dioxide and water. After this pretreatment, the feed gas undergoes to a series of cooling steps through a cryogenic brazed aluminum heat exchanger and fed to a demethanizer column. A stream rich in methane is recovered from the top of this column and fed to a centrifugal compressor and subsequently routed to a booster/turboexpander. The temperature of the methane gas is greatly reduced by the expansion allowing the cooled methane stream to be a cooling source for cryogenic heat exchanger. Feed for a de-ethanizer column comes from the bottom liquids of the de-methanizer column. Ethane is recovered overhead at the de-ethanizer column.

    摘要翻译: 提供了一种基于涡轮膨胀和无机械冷冻分馏的从气流中提取乙烷的方法。 进料气体通过常规胺法和分子筛单元进行脱水脱水以除去二氧化碳和水。 在这种预处理之后,进料气经历一系列冷却步骤,通过低温钎焊铝热交换器进料到脱甲烷塔。 从塔的顶部回收富含甲烷的物流,并将其送入离心压缩机,随后将其送至增压器/涡轮膨胀机。 通过膨胀使得甲烷气体的温度大大降低,使得冷却的甲烷流成为低温热交换器的冷却源。 脱乙烷塔的进料来自脱甲烷塔的底部液体。 乙烷在脱乙烷塔上从顶部回收。

    Liquefaction of Natural Gas
    3.
    发明申请
    Liquefaction of Natural Gas 审中-公开
    天然气液化

    公开(公告)号:US20150285553A1

    公开(公告)日:2015-10-08

    申请号:US14437168

    申请日:2013-11-01

    IPC分类号: F25J1/00

    摘要: Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant and a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant. The system also includes a nitrogen refrigeration system configured to cool the natural gas using a nitrogen refrigerant to produce LNG and a nitrogen rejection unit configured to remove nitrogen from the LNG. As an alternative embodiment, the nitrogen refrigeration system can be replaced by a methane autorefrigeration system.

    摘要翻译: 本文公开了用于形成液化天然气(LNG)的系统和方法。 该系统包括:第一氟烃制冷系统,其被配置为使用第一氟烃制冷剂冷却天然气;以及第二碳氟化合物制冷系统,其被配置为使用第二碳氟化合物制冷剂进一步冷却天然气。 该系统还包括氮气制冷系统,其配置为使用氮气​​制冷剂来冷却天然气以产生LNG,并且氮气排出单元构造成从LNG中除去氮气。 作为替代实施例,氮气制冷系统可由甲烷自动制冷系统代替。