A cyclonic separator (10) comprises a separation chamber (14), a feed inlet (16) leading into the separation chamber and an underflow discharge (18) leading from the separation chamber. The cyclonic separator further comprises a vortex finder which has an inlet end positioned in the separation chamber, an outlet end defining an overflow discharge, and a bleed opening (48) defined by the inlet and outlet ends of the vortex finder and through which a portion of an overflow stream can be bled from the vortex finder to remove oversized particles from the overflow stream.

A cyclonic separator (10) comprises a separation chamber (14), a feed inlet (16) leading into the separation chamber and an underflow discharge (18) leading from the separation chamber. The cyclonic separator further comprises a vortex finder which has an inlet end positioned in the separation chamber, an outlet end defining an overflow discharge, and a bleed opening (48) defined by the inlet and outlet ends of the vortex finder and through which a portion of an overflow stream can be bled from the vortex finder to remove oversized particles from the overflow stream.

Disclosed is a liquid-liquid-solid three-phase separator for waste oil, including an oil-bath heating tank, a plurality of cyclone units and solid removal units. The cyclone units are provided and fixed in the oil-bath heating tank. Each of the solid removal units is connected to an underflow pipe of each of the cyclone units and is configured to separate solid particles. A solid removal outer pipe is arranged at a tail end of the underflow pipe via the first connector; the second connector is arranged at a tail end of the solid removal outer pipe; the solid removal inner pipe is arranged at an underflow outlet of the underflow pipe via the second connector to form a solid removal gap. The invention provides the demulsification and dehydration treatment of waste oil emulsion and the separation of solid particles.

Disclosed is a liquid-liquid-solid three-phase separator for waste oil, including an oil-bath heating tank, a plurality of cyclone units and solid removal units. The cyclone units are provided and fixed in the oil-bath heating tank. Each of the solid removal units is connected to an underflow pipe of each of the cyclone units and is configured to separate solid particles. A solid removal outer pipe is arranged at a tail end of the underflow pipe via the first connector; the second connector is arranged at a tail end of the solid removal outer pipe; the solid removal inner pipe is arranged at an underflow outlet of the underflow pipe via the second connector to form a solid removal gap. The invention provides the demulsification and dehydration treatment of waste oil emulsion and the separation of solid particles.

A separating system, for example for separating material from a suspension such as a biological suspension, is disclosed herein. The system comprises a separation vessel arranged to enable the formation of a cyclone therewithin. For example, the separation vessel may be at least partially conical in shape for enabling the formation of a cyclone therewithin. The separation vessel comprises a fluid inlet, an underflow outlet, a first overflow outlet for removing fluid from a first region inside the separation vessel, and a second overflow outlet for removing fluid from a second region inside the separation vessel.