Various arrangements of a turbine for a rotating coalescer element of a crankcase ventilation system for an internal combustion engine are described. In some arrangements, the turbine is an impulse turbine, which is also known as a pelton turbine or a turgo turbine. The turbine is used to convert hydraulic power from a stream of pressurized fluid to mechanical power that is used to drive the rotating element. The turbine includes a non-wetting surface (e.g., an oleophobic or hydrophobic surface) that repels the pressurized fluid. The non-wetting surface may be achieved through plasma coating, fluoropolymer coating, micro-topography features, and the like. The non-wetting surface increases the power transmission efficiency from the stream of pressurized fluid to the turbine, thereby increasing the rotational speed of the rotating element compared to wettable surfaced turbines, which in turn increases the efficiency of the rotating element.

There is disclosed an air-oil separator for a gas turbine engine. The separator has a first separator section having a first separator rotatably mounted about a rotation axis and having an air-oil mixture inlet and an air-oil mixture outlet; a second separator section having a second separator rotatable about the rotation axis, the second separator having a first air-oil mixture inlet fluidly connected to the air-oil mixture outlet of the first separator, and a second air-oil mixture inlet; and an air outlet. A first flow path extends from the first air-oil mixture inlet to the air outlet through the two separator sections, and a second flow path extends from the second air-oil mixture inlet to the air outlet, solely through the second separator section A method of operating an air-oil separator is also disclosed.

There is disclosed a separator having a first separator and a matrix separator. The first separator caters to an air-oil mixture having a first oil concentration and the matrix separator caters to an air-oil mixture having a second oil concentration being less than the first oil concentration. The matrix separator is disposed at least partially concentrically within the first separator. A wall is disposed radially between the first and second separators. A radial passage extends through the wall. An air-oil mixture outlet of the first separator is fluidly connected to an air-oil mixture inlet of the matrix separator via the radial passage. At least one passage extends radially outwardly from the matrix separator across the first separator. The at least one passage fluidly connects the matrix separator to an environment outside the air-oil separator. A method of removing oil from an air-oil mixture is also disclosed.

A de-oiler for separating oil from an air/oil mixture comprises a housing, and a rotatable porous element accommodated within the housing. The housing has a first axial face and a second, opposite, axial face, the first axial face being separated from the second axial face by an axial length. The housing has an inlet positioned on the first axial face, a first outlet positioned on the second axial face, and a second outlet positioned on a radially outwardly facing surface. In use, the inlet is adapted to receive a first flow comprising an air/oil mixture, and rotation of the porous element separates the oil from the air/oil mixture, with the first outlet being adapted to exhaust a second flow comprising de-oiled air, and the second outlet being adapted to exhaust a third flow comprising separated oil.

A method of processing a polymerization reactor effluent stream comprising utilizing a separation system that removes greater than 99% of the fine polymer particles in the polymerization reactor effluent, wherein the separation system is a bag filter system, and wherein the bag filter is designed and operated to minimize the time required for shutdowns and equipment cleaning.

A vacuum cleaner, including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes a first cyclone provided within an outer case to filter foreign matter and dust from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; and a screw surrounding part of the first cyclone, and configured to be rotatable in at least one direction with respect to the first cyclone, wherein the screw includes a pillar that spans a height of the mesh filter; and a scraper provided on an inner surface of the pillar facing an outer surface of the mesh filter, and configured to sweep off dust and foreign matter accumulated on the mesh filter during the rotation of the screw.

A restaurant exhaust gas purifying system for filtering an exhaust gas of a cooking process including an exhaust vent and an exhaust gas purifier coupled to the exhaust vent. The exhaust gas purifier includes a housing which has an inlet connected to the exhaust vent and an outlet, a hot box connected to and housed within the housing, a heating device connected to the housing and configured for heating the hot box, and a rotating filter rotatably mounted to and housed within the housing. The rotating filter has a rotational cycle in which at least a portion of the rotating filter passes through the hot box. The exhaust gas purifier also includes a drive connected to the housing and operably coupled to the rotating filter for rotating the rotating filter, and a stationary filter positioned in the hot box.

A blow-by gas filtration assembly has an axis and includes a main body having a filtration chamber fitted with an outlet mouth at the axis. A filter group extends along the axis having a hollow cylindrical shape with a central chamber. An engine group operatively connects to the filter group for controlling its rotation about the axis. The engine assembly includes a rotor and a stator. A support and control shaft formed as a hollow body extends along the axis and includes an engine portion on which the rotor integrally mounts and a filter portion on which the filter group integrally mounts so that controlled rotation of the rotor corresponds to rotation of the shaft and thus of the filter group. The filter portion includes an outlet duct of the filtered blow-by gases inside which the outflow of the filtered blow-by gases towards the outlet mouth takes place.

A blow-by gas filtration assembly fluidically connects to a crankcase ventilation circuit of an internal combustion engine. The filtration assembly has an axis and includes a filter group having a hollow cylindrical shape with a central chamber radially traversable by the blow-by gases, preferably from the outside to the inside. In addition, the filtration assembly includes a support and control member engageable to the filter group for supporting it in an axial position along the axis and for controlling it in rotation around the axis to perform the filtration operations. The member and the filter group include, respectively, a threaded member portion and a threaded filter portion engageable by reciprocal screwing. The member and the filter group also include, respectively, a member abutment and a filter abutment axially engageable along the axis to prevent further screwing of the threaded member portion and a threaded filter portion.

An intake air distribution system for removing contamination from an air filter screen includes walls defining an interior space. The intake air distribution system includes an air blower positioned within the interior space of the air filter screen. The air blower includes an inlet positioned to draw air in through the air filter screen and an outlet through which air is exhausted from the blower. A manifold is connected to the outlet of the blower for directing air onto the walls of the air filter screen and out through the air filter screen.