Separator vessel and installation comprising such a vessel

A separator vessel for separating liquid and gas phases comprising:

• a container of generally cylindrical shape extending in a longitudinal direction, which is horizontal in the use configuration, a lower part of the container being provided with a downwardly extending protrusion forming an additional volume communicating with the rest of the cylindrical volume of the container, the protrusion being configured to create a liquid level in the main container with a liquid height of no more than 500 mm,
• wherein the container further comprises:
• a first fluid inlet situated in the upper part thereof, a first outlet situated in the lower part of the protrusion, the first inlet and the first outlet being configured to be connected to a first heat exchanger in order to form a thermosiphon,
• wherein the container further comprises:
• a second inlet, which is distinct from the first inlet, situated in an upper part thereof, and a second outlet, which is distinct from the first outlet, situated in the upper part thereof, the second inlet and the second outlet being configured to be connected to at least one second heat exchanger and to collect an at least partially liquid fluid and to return a gaseous fluid, respectively.