Separators for three-phase or two-phase fluid mixtures realized with a centrifugal device designed for the separation of the gas from the liquid mixture

Three-phase or two-phase separator, including a centrifugal separation device (40, 70) placed at the inlet of the vessel (21, 64) for the separation of the gaseous phase from the incoming fluid stream characterized in that the aforesaid centrifugal separation device (40, 70) includes a first stage (40′,70′) of annular section and an inner second stage (40″, 70″), coaxial to the first one;

• said first stage being delimited between the vessel internal wall (42, 63) and the external wall of the second stage that includes an element (47) built with a steel plate shaped like a spiral around the vertical axis of the centrifugal separation device, in order to separate the gas from liquids directing the flow through a circular pattern that brings the liquid and solid droplets into contact with the internal wall of the vessel (42, 63) in the first stage and with the internal wall of the spiral (47) of the second stage, thus separating (from the gas) said liquid and solid droplets, which eventually fall by gravity into the lower section of the centrifugal separator (20, 60).