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    • 74. 发明授权
    • Water removal and heavy-hydrocarbon removal process in liquefied natural gas production from mixed gas rich in methane
    • 从富含甲烷的混合气体中生产液化天然气中的除水和重质烃清除工艺
    • US09404685B2
    • 2016-08-02
    • US14345401
    • 2012-09-13
    • Yonggen XuanHuazhou Xu
    • Yonggen XuanHuazhou Xu
    • B01D53/02F25J3/06C10L3/10B01D53/04
    • F25J3/0635B01D53/0423B01D53/0462B01D2256/245B01D2257/702B01D2257/80B01D2259/40001B01D2259/402B01D2259/406B01D2259/416C10L3/101C10L3/102C10L3/106C10L2290/08C10L2290/12C10L2290/541C10L2290/542C10L2290/543F25J3/061Y02C20/20
    • A process for dehydrating and removing heavy hydrocarbons in the production of liquefied natural gas from a methane-rich gas mixture is disclosed, wherein the methane-rich gas mixture subjected to deacidification treatment is divided into two streams, i.e. the first stream and the second stream, wherein the first stream used as a system process gas is introduced into a drying procedure, and the second stream used as regenerating gas is introduced into a regenerating procedure; the first stream is subjected to a drying treatment, and the moisture and the heavy hydrocarbons are simultaneously removed from the first stream in a composite adsorbent bed(s) of a drying tower, wherein the moisture is removed such that the dew point at normal pressure is ≦−76° C. and the heavy hydrocarbon components of C6 and higher are removed such that the content of these components is ≦217 ppm; and the second stream is used as a regenerating gas in the regenerating procedure of the above-mentioned drying tower, subjected to a regenerating process, and then returned as a part of the system process gas. Comparing to those conventional processes, the present invention can achieve good purifying effect, lower equipment investment and late-stage energy consumption of the system, increase utilization ratio of feed gas, and the operation target of each unit becomes more clear and easy to control. The present invention further relates to an apparatus for carrying out the process.
    • 公开了一种从富含甲烷的气体混合物中脱氢和除去液化天然气生产中的重质烃的方法,其中进行脱酸处理的富含甲烷的气体混合物被分成两股流,即第一流和第二流 其中将用作系统工艺气体的第一料流引入干燥程序中,将用作再生气体的第二料流引入再生方法; 对第一流进行干燥处理,并且在干燥塔的复合吸附床中同时从第一流中除去水分和重质烃,其中去除水分使得常压下的露点 ≤-76℃,并且除去C6和更高的重质烃组分,使得这些组分的含量≤217ppm; 并且在上述干燥塔的再生过程中将第二流用作再生气体,进行再生过程,然后作为系统工艺气体的一部分返回。 与传统方法相比,本发明可以实现良好的净化效果,较低的设备投入和系统的后期能耗,提高进料气的利用率,每个单元的运行目标变得更加清晰易控。 本发明还涉及一种用于执行该过程的装置。