| 摘要 |
An ethane recovery process utilizing multiple reflux streams is provided. Fe ed gas (20) is cooled, partially condensed, and separated into a first liquid stream (52) and a first vapor stream (54). First liquid stream is expanded a nd sent to a demethanizer (70). First vapor stream is split into a first and second separator vapor streams. First separator vapor stream (56) is expande d and sent to demethanizer (70). Second separator vapor stream (54 b~) is partially condensed and is separated into a reflux separator liquid stream (60), which is sent to demethanizer (70), and a reflux separator vapor strea m (66~~), which is condensed and sent to demethanizer (70). Demethanizer (70) produces a tower bottom stream (77) containing a substantial amount ethane a nd heavier components, and a tower overhead stream (78) containing a substantia l amount remaining lighter components and forms a residue gas stream. A portio n of residue gas stream (122) is cooled, condensed, and sent to the demethaniz er tower as top reflux stream.
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