Method for separating gas and liquid and cyclone separators therefore

A cyclone separator for separating a fluid into a gas phase and a liquid phase, the cyclone separator comprising:

• a vertically oriented vessel with cylindrical symmetry and which has a gas phase outlet at an upper end of the vessel and a liquid phase outlet at a lower end of the vessel;
• at least one tangentially oriented fluid inlet at the upper end below the gas phase outlet of the vessel, able to form a helical liquid flow down along an internal wall of the vessel;
• a liquid extractor for extracting liquid through the liquid phase outlet at a rate which forms a bulk liquid phase at the lower end of the vessel with a relatively constant height level of a bulk liquid-gas interphase;
• a gas extractor extracting gas through the gas phase outlet;
• and
• at least one flow velocity deflector arranged adjacent to the internal wall of the vessel, the flow velocity deflector being located at a level in proximity of the bulk liquid-gas interphase and configured to change a vertical velocity component of a liquid film travelling down the internal wall of the vessel to a horizontally oriented velocity component,
• wherein the at least one flow velocity deflector is arranged below the bulk liquid-gas interphase, and
• wherein the at least one flow velocity deflector is a curved flow velocity screen.