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    • 2. 发明申请
    • PROCESS FOR TREATING A NATURAL GAS CONTAINING CARBON DIOXIDE
    • 用于处理含二氧化碳的天然气的方法
    • US20130036765A1
    • 2013-02-14
    • US13643261
    • 2011-04-28
    • Xavier Renaud
    • Xavier Renaud
    • F25J3/08
    • F25J3/0266F25J3/0209F25J3/0233F25J3/0242F25J2200/02F25J2200/70F25J2200/74F25J2205/02F25J2205/04F25J2215/04F25J2220/84F25J2230/30F25J2230/80F25J2235/80F25J2260/80F25J2270/02F25J2270/80F25J2290/72Y02C10/12
    • The disclosure includes a process for treating a natural gas containing carbon dioxide wherein the natural gas is separated by a cryogenic process in order to provide, on the one hand, a stream of liquid carbon dioxide, containing hydrocarbons, and, on the other hand, purified natural gas; at least one part of the natural gas is cooled in a first heat exchanger and then in a second heat exchanger before the cryogenic process and/or before a reflux to the cryogenic process; at least one part of the stream of liquid carbon dioxide is recovered in order to provide a stream of recycled carbon dioxide; the stream of recycled carbon dioxide is divided into a first portion and a second portion; the first portion is expanded and then heated in the first heat exchanger, in order to provide a first stream of heated carbon dioxide; the second portion is cooled, then at least one part of the second portion is expanded and then heated in the second heat exchanger, in order to provide a second stream of heated carbon dioxide; at least some of the hydrocarbons contained in the first stream of heated carbon dioxide and in the second stream of heated carbon dioxide are recovered by liquid/gas separation.
    • 本公开包括用于处理含二氧化碳的天然气的方法,其中天然气通过低温方法分离,以便一方面提供含有烃的液态二氧化碳流,另一方面, 净化天然气; 至少一部分天然气在第一热交换器中冷却,然后在第二热交换器中在低温过程之前和/或在回流到低温过程之前冷却; 回收液态二氧化碳流的至少一部分以提供再循环二氧化碳流; 再循环二氧化碳流被分成第一部分和第二部分; 第一部分被膨胀,然后在第一热交换器中加热,以便提供第一加热二氧化碳流; 第二部分被冷却,然后将第二部分的至少一部分膨胀,然后在第二热交换器中加热,以便提供第二加热二氧化碳流; 通过液体/气体分离回收加热二氧化碳的第一流中和加热的二氧化碳的第二流中包含的至少一些烃。