Compressor with a system for removing liquid from the compressor

A centrifugal compressor, comprising:

• a casing comprising a gas inlet and a gas outlet;
• a rotor arranged in the casing and configured to rotate around a vertical rotation axis, the rotor comprising at least one impeller having an impeller suction side and an impeller delivery side;
• a gas flow path extending from the gas inlet to the gas outlet;
• in the casing,
• an inlet plenum extending from the gas inlet towards the impeller suction side;
• a suction tube having a lower suction end and an upper discharge end, the lower suction end arranged at a bottom of the inlet plenum and the suction tube extends upwardly towards the impeller suction side;
• and
• an ejector adapted to promote a fluid flow in the suction tube.

A centrifugal compressor, comprising:

• a casing comprising a gas inlet and a gas outlet;
• a rotor arranged in the casing and configured to rotate around a vertical rotation axis, the rotor comprising at least one impeller having an impeller suction side and an impeller delivery side;
• a gas flow path extending from the gas inlet to the gas outlet;
• and,
• in the casing,
• an inlet plenum extending from the gas inlet towards the impeller suction side;
• and
• a suction tube having a lower suction end and an upper discharge end, the lower suction end is arranged at a bottom of the inlet plenum and the suction tube extends upwardly towards the impeller suction side;
• a drainage duct, adapted to collect liquid in the compressor,
• wherein the at least one drainage duct extends through a strut across the inlet plenum.

A centrifugal compressor, comprising:

• a casing comprising a gas inlet and a gas outlet;
• a rotor arranged in the casing and configured to rotate around a vertical rotation axis, the rotor comprising at least one impeller having an impeller suction side and an impeller delivery side;
• a gas flow path extending from the gas inlet to the gas outlet;
• and,
• in the casing,
• an inlet plenum extending from the gas inlet towards the impeller suction side;
• and
• a suction tube having a lower suction end and an upper discharge end, the lower suction end is arranged at a bottom of the inlet plenum and the suction tube extends upwardly towards the impeller suction side;
• a drainage duct, adapted to collect liquid in the compressor;
• and
• a liquid collection chamber at least partly extending below the bottom of the inlet plenum, and fluidly coupled to the inlet plenum,
• wherein the at least one drainage duct is fluidly coupled to the liquid collection chamber.