SYSTEM COMPRISING CENTRIFUGAL SEPARATOR AND METHOD FOR CONTROLLING SUCH A SYSTEM

The present invention relates to a system comprising a hermetic centrifugal separator (1) where the separator comprises a rotor including a separation chamber (20), an inlet channel (2) for a mixture of components to be separated, a first outlet channel (4) for receiving at least one separated light component, and a second outlet channel (5) for receiving at least one separated heavy component. The system further comprises recirculation means (8) for recirculating from said second outlet channel (5) to said separation chamber (20) part of the separated heavy component, a first monitoring means (12) monitoring density, flow rate, or combination thereof, of the heavy component flowing in said second outlet channel (5), and a first control means (11, 15, 18) controlling recirculation flow rate in response to a control signal from said first monitoring means (12). The invention provides a system and method which control the characteristics of the separated heavy component even when feeding the separator with a feed of varying contents.