An electrostatic charging air cleaning device having first and second pre-chargers. The first pre-charger is configured to generate a first corona discharge to electrostatically charge PM in the incoming air stream with a first charge to form a first exiting air stream exiting the first pre-charger. The second pre-charger is configured to generate a second corona discharge to electrostatically charge PM in the incoming air stream with a second charge to form a second exiting air stream exiting the second pre-charger. The device also includes a separator having apertures such that PM in the second exiting air stream passes through the separator to agglomerate with PM in the first exiting air stream to form agglomerated particles. The apertures are sized such that the agglomerated particles are larger than the apertures to preclude the agglomerated particles from reentering the second exiting air stream.

A vehicle including at least one filter for trapping particles in a vehicle's outside surrounding air. The filter includes a first part and a second part. The first part includes a first cilia layer. An air inlet is arranged in one end of the filter. The first cilia layer is arranged to trap at least some particles in the air flowing into the filter via the air inlet when the first cilia layer is electrostatically charged by an electromagnetic field. The filter is connected to a vehicle chassis and such that one of the first and second parts faces the vehicle chassis and the other part faces ground.

A clarifier with an improved rake comprising a plurality of arms, wherein each arm of the rake including a series of arcuate blades, which each blade increasing in height and angle relative to the rake arm as radial distance of the blade relative to the center of the rake decreases.

A carbon dioxide recovery device includes: an adsorption unit that includes a plurality of electrochemical cells, each of which includes a working electrode and a counter electrode; a receiver that receives the adsorption unit; a plurality of gas inlets, each of which is provided to the receiver and is configured to introduce a subject gas containing carbon dioxide; and a plurality of doors, each of which is configured to open and close a corresponding one of the gas inlets. The gas inlets are respectively configured to introduce the subject gas into an inside of the receiver in a corresponding direction perpendicular to a cell stacking direction of the electrochemical cells and are configured to introduce the subject gas into the receiver from all around the receiver along a circumferential direction of the receiver that is perpendicular to the cell stacking direction.

A clarifier with an improved rake comprising a plurality of arms, wherein each arm of the rake including a series of arcuate blades, which each blade increasing in height and angle relative to the rake arm as radial distance of the blade relative to the center of the rake decreases.

A clarifier with an improved rake comprising a plurality of arms, wherein each arm of the rake including a series of arcuate blades, which each blade increasing in height and angle relative to the rake arm as radial distance of the blade relative to the center of the rake decreases.

Provided is an air purification apparatus and method. The apparatus comprises a body having a cavity, an air intake, and an air exhaust. A water reservoir, disposed within the cavity contains a fluid and is in fluid communication with the air intake. A first chamber is disposed within the cavity and is in fluid communication with the water reservoir and the air exhaust. A solar power assembly attaches to the body, the solar power assembly has one or more solar panels. The air purification apparatus has a battery in electrical communication with the one or more solar panels.

A vortex particle separator has an impeller at a housing inlet with impeller blades spiraling around an impeller shaft and longitudinal axis of the separator to impart either clockwise or counterclockwise rotation to air flowing through the impeller when viewed looking downstream along the axis. The upstream end of each impeller blade is inclined in a direction opposite to the direction the air rotates when passing through the impeller, measured from a radial baseline through the axis and the juncture of the blade with the center shaft of the impeller. Thus, in each orthogonal plane along the axial length of the impeller the juncture of the blade with the housing is offset from the baseline in the rotational direction opposite the direction in which air flows through the impeller. An offset angle of 45 to 55 is believed suitable.

The subject matter of the invention is a filter element (13) for insertion into a vacuum cleaner, with an upper side (14), a lower side (15) which lies opposite the upper side (14), a filter body (19) which extends from the upper side (14) to the lower side (15) and which forms a wall (26) of a clean air space which is situated between the upper side and the lower side, and with a conveying opening (17) which is arranged on the upper side (14), opens into the clean air space, and through which an air flow which is driven by way of the vacuum cleaner can be conveyed. According to the invention, a deflecting surface (20) which extends in the direction of the lower side (15) is arranged in the clean air space below the conveying opening (17), which deflecting surface (20) is configured to deflect an air flow which is introduced through the conveying opening (17) in the direction of the wall (26) of the clean air space. The filter element (13) according to the invention can be relieved of filter cakes in a simple and effective way.

A carbon abatement system includes at least one carbon abatement panel including a carbon abatement material. The at least one carbon abatement panel is rotatable about an axis to maximize exposure of the carbon abatement material to sunlight.