Abstract: An air duct system is disclosed, and includes an air duct having a main body, where the main body of the air duct defines a passageway having a reflective inner surface. The air duct system also includes an ultraviolet light source configured to generate ultraviolet light. The ultraviolet light source directs the ultraviolet light along the reflective inner surface of the air duct.

Abstract: A radiator screen arrangement (10) for a combine harvester is provided. A screen (12) through which air, which is to pass through a radiator, is drawn by a fan. Rotating means (16) are provided for rotating the screen. Blanking means (18), past which the screen is rotated, provides a blanked off area of the screen which is not subject to the induction pressure of the fan and from which particles can therefore be more easily removed. The arrangement is characterised in that the blanking means has a leading edge (18a) which is of generally spiral shape so that the particles on the outer surface of the screen which enter the blanked-off area can reach the outer periphery (12d) of the rotating screen without being exposed to the induction pressure of the fan and hence have an improved chance of being detached from the screen.

Abstract: A cleaning process for filtration material of a gas filter is disclosed. A first step hinders the gas flow from passing through the filtration material by closing the clean gas side of a single segment or a row of filter segments. A second step provides a slow gas flow to the closed filter segments to cause a reverse gas flow through the filtration material. A third step opens an impulse valve for an ultra short time to create a compressed gas impulse for disengaging the particles which did not fall off the filtration material during the second step of the cleaning process. A fourth step shuts off the reverse flow gas supply. A device for separating one or several filter segments from the clean gas side of the filter filtration material is also disclosed.

Abstract: Disclosed herein are an automatically replaceable apparatus for collecting byproducts in semiconductor producing equipment and a control method thereof. The apparatus includes several trap units mounted to a vertical shaft at regular angular intervals and rotating in response to a driving direction of a servo motor. Upper and lower plates support the vertical shaft, and connect byproduct inlet and outlet ports, cleaning-water supply and discharge ports, and dry-gas supply and exhaust ports to the respective trap units. Trap and plate coupling means are extended at normal times to air-tightly seal gaps between the upper and lower plates and the trap units, and contracted when the trap units are rotated in a predetermined direction for the replacement. The servo motor is mounted to a lower surface of the lower plate and rotates the trap units within a predetermined angular range. A control unit controls the operation of the components.

Abstract: A combustion engine comprising an exhaust system containing a particulate filter (10, 52) for trapping particulate matter in engine exhaust passing through the exhaust system. A particulate trapping medium (18) inside a casing is selectively operable to a relatively lesser porosity for trapping particulate matter in the exhaust and to a relatively greater porosity for facilitating removal of trapped particulate matter during cleaning.

Abstract: A cleaning process for filtration material of a gas filter is disclosed. A first step hinders the gas flow from passing through the filtration material by closing the clean gas side of a single segment or a row of filter segments. A second step provides a slow gas flow to the closed filter segments to cause a reverse gas flow through the filtration material. A third step opens an impulse valve for an ultra short time to create a compressed gas impulse for disengaging the particles which did not fall off the filtration material during the second step of the cleaning process. A fourth step shuts off the reverse flow gas supply. A device for separating one or several filter segments from the clean gas side of the filter filtration material is also disclosed.

Abstract: A reversible pivoting vane rotary compressor includes a housing having a generally cylindrical chamber defined by an inner wall. A rotor is mounted eccentrically within the chamber to define about the rotor a generally crescent shaped compression chamber, which narrows from a main chamber region to a constricted chamber region, which rotor has a circumferential surface. A pair of reversible intake and exhaust ports are connected communicably with the constricted chamber region. Each port selectively and alternately introduces air into the constricted chamber region while the other port exhausts air from the constricted region. At least one adjoining pair of curved vanes are pivotably attached to the rotor and extend in generally opposite arcuate directions from the rotor into the chamber.

Abstract: A connecting line is provided for removing water entering an air filter housing, between the air filter housing and a cooling unit. Due to the existing difference in pressure between the air filter housing and the cooling unit, water can be suctioned out of the air filter housing via the connecting line.

Abstract: A Diesel particulate filter cartridge system for filtering particulate matter and nitrogen oxide from a flow of air containing particular matter includes a filter support plate with a plurality of cylindrical electrically regenerable filter media members connected thereto. A NOx trap is also provided that is either incorporated directly into the filter media members or provided as a separate structure in close proximity to the filter media members. A valve assembly includes a number of independently actuatable damper valves that correspond to a number of through holes in the filter support plate. When actuated, the damper valves limiting flow of air through a corresponding through hole and filter media member connected thereto. An outer housing is disposed about the valve assembly and filter media members to contain them in a compact package. A programmable computer control module shuts off the flow of air through a filter media member and selectively electrically regenerates it.

Abstract: An apparatus and method for ultraviolet irradiation of air for the purpose of removing contaminants from that air is disclosed. A U-shaped ultraviolet bulb enshrouded within a quartz tube provides enhanced contaminant destruction characteristics. By combining a plurality of those bulbs in a chamber that is of polished aluminum, and further combining aluminum filters therewith, added irradiation enhancement is achieved. Further provided are baffles or baffling proximate the ultraviolet bulbs that cause the air to go turbulent thus drawing the air closer to the ultraviolet bulb and further enhancing the contaminant destruction characteristics. Moreover disclosed is treatment of substrates with a chemical agent that facilitates the arrest of contaminants from the air onto the substrate for further irradiation of the contaminants from the bulbs. This further irradiation breaks down the arrested contaminants thus providing the substrate with a self-cleansing effect.

Abstract: A plasma tube comprising a vacuum sealing ceramic outer tube, a porous ceramic insert disposed on the inside wall of the outer tube, and a source of high frequency radiation, for example, an RF coil wrapped around the tube, to excite gas flowing through the bore of the insert into a plasma. The invention is particularly useful as an exhaust scrubber for oxidizing exhaust gases from a semiconductor processing chamber. A catalyst may be embedded in the porous insert to promote the scrubbing reaction. The invention may also be used in an applicator of a remote plasma source.

Abstract: An apparatus and method for ultraviolet irradiation of air for the purpose of removing contaminants from that air is disclosed. A U-shaped ultraviolet bulb enshrouded within a quartz tube provides enhanced contaminant destruction characteristics. By combining a plurality of those bulbs in a chamber that is of polished aluminum, and further combining aluminum filters therewith, added irradiation enhancement is achieved.

Abstract: A device adapted to indicate the degree to which a filter is soiled is prded, for use in filtering separators of the type having bag-, pouch-, or cartridge-shaped filters. The device has a hose- or tube-shaped air conveyance section. The air conveyance section has at one end a surface contact fitting. An air conveyor is arranged in the air conveyance section. The air conveyor generates an air flow in at least one direction. A pressure gauge is associated with the air conveyance section. The pressure gauge senses and displays the pressure in the airflow. The air conveyance section is equipped with at least one of an air flow meter and an air volume meter with a display. The device is configured as a portable unit. Preferably, the device also includes a dedusting device. The dedusting device has a hose- or tube-shaped dedusting air conveyance duct. The dedusting air conveyance duct has at one end the aforementioned surface contact fitting. A valve is arranged in the dedusting air conveyance duct.

Abstract: A filtering apparatus includes a filter vessel having an inlet and an outlet for fluid. A tube sheet is disposed within the filter vessel and separates the inlet from the outlet. A plurality of elongated filter elements extend nonvertically from the tube sheet, each filter element having a first end and a second end farther from the tube sheet than the first end and being at a different height than the first end.

Abstract: A self cleaning screen particularly for an engine cooling system comprises a housing having a screen front wall and a rear wall in which there is provided a circular opening. The housing is divided by divider plates connecting between the front and rear walls and extending outwardly from the circular opening to outer side edges of the housing. A baffle is mounted at the center of the opening and is rotatable by a fin or an electric motor. The baffle includes a triangular front plate for closing off a part of the screen aligned with the opening together with a side plate portion which closes off the area defined between the divider plates. As the baffle rotates therefore a portion of the screen extending radially from the centre of the opening to the side edge is closed off so that air does not flow through that area allowing filter debris to fall from the screen.

Abstract: In filtering a tar mist-containing gas to remove the tar, a filter bag having an inner surface and an outer surface is coated with a tar absorbent powder by feeding the powder into the top of the bag for free-fall therethrough while maintaining a slightly reduced pressure outside the bag to deposit the powder on the inner surface of the bag and then feeding the tar mist-containing gas into the filter bag while maintaining a greatly reduced pressure outside the filter bag to collect a layer of tar on the coating, and thereafter stripping the powder containing the absorbed tar from the inner surface of the filter bag.

Abstract: Equipment for treating waste gas containing tar mist is constituted by bag houses having bag filters therein and in which a filter cleaning apparatus for each filter is installed, respectively, a conducting duct for waste gas containing tar mist connected to each bag house and equipped with a shut-off valve, respectively, a discharging duct for treated waste gas and a supply tube for supplying protective coating material which is caused to form a precoated layer on the surface of the bag filter. The efficiency of the waste gas treatment is improved by the action of the precoated layer in inhibiting the direct contact of tar mist with the bag filter.