Method of liquefying a contaminated hydrocarbon-containing gas stream

摘要

The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream, the method comprising at least the steps of:
(a) providing a contaminated hydrocarbon-containing gas stream (10);
(b) cooling the contaminated hydrocarbon-containing gas stream (10) in a first heat exchanger (3) thereby obtaining a cooled contaminated hydrocarbon-containing gas stream (40);
(c) cooling the cooled contaminated hydrocarbon-containing gas stream (40) in an expander (4) thereby obtaining a multiphase stream (50);
(d) separating the multiphase stream (50) in a separator (5) thereby obtaining a gaseous stream (60) and a slurry stream (70);
(e) separating the slurry stream (70) in a solid/liquid separator (6) thereby obtaining a liquid hydrocarbon stream (90) and a concentrated slurry stream (80);
(f) passing at least a part of the gaseous stream (60) obtained in step (d) through the first heat exchanger (3) thereby obtaining a heated gaseous stream (120); and
(g) combining the heated gaseous stream obtained (120) in step (f) with the contaminated hydrocarbon-containing gas stream (10) provided in step (a).