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.

The disclosure discloses a cyclonic separator and a cleaning appliance. The cyclonic separator includes a cyclonic separating drum and a centripetal force redirecting duct. The cyclonic separating drum has an upper side edge that communicates with a tangential air duct, through the tangential air duct, air with particles is guided to form an airflow consistent with a direction of the tangential air duct and tangentially enters the cyclonic separating drum to form a rotating airflow. The centripetal force redirecting duct is arranged in an upper portion of the cyclonic separating drum and communicating with the tangential air duct, such that after the rotating airflow enters the centripetal force redirecting duct, a direction of a centripetal force of the rotating airflow is changed to above a side of a direction of a support force of a drum wall of the cyclonic separating drum.

The disclosure discloses a cyclonic separator and a cleaning appliance. The cyclonic separator includes a cyclonic separating drum and a centripetal force redirecting duct. The cyclonic separating drum has an upper side edge that communicates with a tangential air duct, through the tangential air duct, air with particles is guided to form an airflow consistent with a direction of the tangential air duct and tangentially enters the cyclonic separating drum to form a rotating airflow. The centripetal force redirecting duct is arranged in an upper portion of the cyclonic separating drum and communicating with the tangential air duct, such that after the rotating airflow enters the centripetal force redirecting duct, a direction of a centripetal force of the rotating airflow is changed to above a side of a direction of a support force of a drum wall of the cyclonic separating drum.

A method for cyclonic separation and discharging of dust includes the following steps. Guiding air with particles to form an airflow consistent with a tangential direction of a cyclonic separating drum and then making the airflow enter the cyclonic separating drum tangentially to form a rotating airflow. Changing a direction of a centripetal force of the rotating airflow to above a side of a direction of a support force of a drum wall of the cyclonic separating drum or adjusting the direction of the support force of the drum wall of the cyclonic separating drum to below the side of the direction of the centripetal force of the rotating airflow, such that the particles are subjected to a downward component force directed towards a dust discharge port of the cyclonic separating drum to pull and discharge separated particles.

A discharge arrangement (120) for a comminution reactor assembly (100). The discharge arrangement (120) comprises a main chamber (202) extending along a main axis (124). The main chamber has an inlet (121) arranged to be fluidly connected to a comminution reactor (110) and an outlet (122) arranged opposite from the inlet (121) along the main axis (124) and closeable by a common material take-out valve (204). The main chamber (202) is arranged to support a fluid-material stream (123) along a helical path about the main axis (124) from the inlet (121) towards the outlet (122). The discharge arrangement (120) further comprises an airduct (206) arranged extending into the main chamber (202) at an acute angle (a) with respect to the main axis (124). The airduct (206) comprises an aperture arranged facing the outlet (122). Thereby, a portion (125) of the fluid-material stream (123) changes direction from the helical fluid-material stream (123) about the main axis (124) from the inlet (121) towards the outlet (122) to a helical flow inside the airduct (206).

A discharge arrangement (120) for a comminution reactor assembly (100). The discharge arrangement (120) comprises a main chamber (202) extending along a main axis (124). The main chamber has an inlet (121) arranged to be fluidly connected to a comminution reactor (110) and an outlet (122) arranged opposite from the inlet (121) along the main axis (124) and closeable by a common material take-out valve (204). The main chamber (202) is arranged to support a fluid-material stream (123) along a helical path about the main axis (124) from the inlet (121) towards the outlet (122). The discharge arrangement (120) further comprises an airduct (206) arranged extending into the main chamber (202) at an acute angle (a) with respect to the main axis (124). The airduct (206) comprises an aperture arranged facing the outlet (122). Thereby, a portion (125) of the fluid-material stream (123) changes direction from the helical fluid-material stream (123) about the main axis (124) from the inlet (121) towards the outlet (122) to a helical flow inside the airduct (206).

An ultra violet air disinfectant machine 100 that includes a cyclone separator 120 configured and arranged for effecting a spiral vortex flow of air through a disinfection chamber 129 about a longitudinal axis x operable for inertial concentration of microbes in the spiral vortex flow of air proximate a sidewall 122s of the cyclone separator 120, and a source of germicidal ultraviolet radiation 140 positioned external to the disinfection chamber 129 for emitting germicidal ultraviolet radiation towards and into the disinfection chamber 129.

A cyclonic separator is taught for separation of a mixed liquid phase/gas phase process stream. The cyclonic separator comprises an outer shell, at least two cyclonic chambers located within the outer shell, each cyclonic chamber having an upper end and a lower end; a single, common tangential inlet passing tangentially through the outer shell and into each of the at least two cyclonic chambers, proximal the upper ends thereof; a gas outlet tube located at least partially within each cyclonic chamber, extending axially from a lower gas outlet end located below the tangential inlet, to an upper gas outlet end extending out of each of the at least two cyclonic chambers, said upper gas outlet ends being in fluid communication with a common gas chamber located above the outer shell; and a circumferential recycle opening formed around and through a thickness each gas outlet tube, in a portion of each gas outlet tube located axially between the upper end of cyclonic chambers and the common gas chamber, said recycle opening thus being in fluid communication with an inside cavity of the outer shell.

Cyclone separator 1 for separating liquid from a flow 8 of gas and liquid, comprising a housing with a mainly tubular inner wall 2, whereby an inlet 3 is provided in the housing for carrying the flow at least partially tangentially against the inner wall, whereby an outlet 4 is further provided at the top of the housing, so that during operation the flow forms a vortex 5 between the inlet and the outlet, and whereby the liquid 6 impacts against the inner wall due to centrifugal force in order to be discharged 11, characterized in that the housing, at least in a zone above the inlet, has a mainly tubular auxiliary wall 7, whereof an outer side is spaced from and directed towards the inner wall, so that during operation the vortex is at least partially bounded by an inner side of the auxiliary wall in order to reduce contact between the vortex and the liquid at the inner wall.

A vortex finder, for a cyclonic separator, includes a plurality of stationary vanes having a round convex front end around which incoming air is guided into the vortex finder, wherein, where air separates from the plurality of stationary vanes inside of the vortex finder, a cross-section of the plurality of stationary vanes has only one sharp edge. Preferably, a mean line of the cross-section of the plurality of stationary vanes does not cross a chord line in an upstream half of the cross-section. Preferably, a side of the plurality of stationary vanes facing the incoming air is provided with a protrusion at a stagnation point. The protrusion may be shaped so as to guide the incoming air into the vortex finder, and may have a concave side following a shape of a neighboring vane, and a rounded top.