| 摘要 |
<p>An ethane recovery process utilizing multiple reflux streams is provided. Feed 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 and sent to a demethanizer (70). First vapor stream is split into a first and second separator vapor streams. First separator vapor stream (56) is expanded 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 stream (66''), which is condensed and sent to demethanizer (70). Demethanizer (70) produces a tower bottom stream (77) containing a substantial amount ethane and heavier components, and a tower overhead stream (78) containing a substantial amount remaining lighter components and forms a residue gas stream. A portion of residue gas stream (122) is cooled, condensed, and sent to the demethanizer tower as top reflux stream.</p> |
