| 摘要 |
<p>The invention relates to a method for separating a fraction rich in C2+from liquefied natural gas (LNG), comprising the following steps: a) partialevaporation (E1, E2) of the liquefied natural gas (1, 1'); b) separation(D1) of the partially evaporated natural gas (2) into a first gas fraction (4)rich in C1 and a first liquid fraction (3) rich in C2+; c) rectifyingseparation (T) of the first liquid fraction (3) rich in C2+ into a secondgas fraction (8) rich in C1 and a second liquid fraction (10) rich inC2+; d) re-liquefaction (E1) of the first gas fraction (4) rich in C1and e) feeding of at least one sub-stream (6) of the re-liquefied gas fraction(5) rich in C1 as a return flow to the rectifying separation (T) stage.</p> |
