Abstract: A feed center for powder coating material includes a hopper, an extraction duct, and a control valve. The hopper is in fluid communication with a fluidizing pressure source. The extraction duct is in fluid communication with at least one suction source. The control valve connects the extraction duct with an extraction port of the hopper. The control valve is operable between a first position for applying suction from the at least one suction source to the hopper, and a second position providing an exterior opening in at least one of the control valve and the first extraction duct for exhausting pressurized fluid from the hopper and/or collecting at least some of the air and powder that is exhausted from the powder.

Abstract: Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.

Abstract: Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.

Abstract: A vacuum cleaner having a housing with a dust container having an inlet for dust laden air, a filter unit comprising a flexible filter body, a motor fan unit for generating a flow of air through the inlet and through the filter unit, and a dust removing means configured to agitate the flexible filter body in response to a force applied to the dust removing means.

Abstract: A vacuum cleaner filter bag with an inlet opening including a deflection device and an air-permeable material is provided. The deflection device is arranged in the interior of the vacuum cleaner filter bag in the area of the inlet opening and which is implemented such that an air current flowing in through the inlet opening can be deflected by the deflection device. The air-permeable material layer is arranged in the interior of the vacuum cleaner filter bag, is connected to the vacuum cleaner filter bag at least one point, and includes at least one part that is not connected to the vacuum cleaner filter bag and that includes part of the boundary of the material layer.

Abstract: Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.

Abstract: The present invention relates to a separating apparatus for separating particles from a fluid flow. Particularly, but not exclusively, the invention relates to a vacuum cleaner having such a separating apparatus for removing dust particles from a dust laden airstream. The separating apparatus includes a first cyclonic cleaning stage, a second cyclonic cleaning stage arranged downstream from the first cyclonic cleaning stage, and an elongate filter arranged downstream from the second cyclonic cleaning stage, wherein the filter is at least partially surrounded by the first cyclonic cleaning stage.

Abstract: An improved filtration apparatus, filtering method and filtering material for capturing mercury and other pollutants in pollutant-laden fluid streams such as flue gases generated by process gas streams are disclosed. The improved filtration system may include two pollutant remediation layers, an upstream layer capable of filtering particulates and a downstream layer capable of adsorbing and/or catalyzing pollutants such as mercury, dioxin, furans, and NOx. The improved filtration system may be in the form of a particulate filter bag. The particulate filter bag may be configured for use in a reverse air filtration system with the upstream layer facing an internal volume of the bag. The upstream layer may include an ePTFE layer laminated to the upstream side of the upstream layer.

Abstract: Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.

Abstract: A negative pressure dust collector with a dust receiving bag comprises a ventilation hood and an exhaust device. The ventilation hood includes a motor, fan blades, and a first exit. A dust collection tank is positioned below the first exit. The exhaust device comprises a ventilation tube and a flexible tube.

Abstract: A lateral dispersion filter basket provides turbulence at the bottom of the filter basket reducing strain on the bottom seam of the filter bag disposed therein causing the particulate being filtered to move up along the vertical walls of the filter bag.

Abstract: A specially arranged industrial dust collector with multiple filtering compartments is provided which is efficient, effective, and economical. The special industrial dust collector has a solids-gas separation compartment which is positioned generally alongside and laterally offset from multiple filtering compartments. The multiple filtering compartments can contain cartridge filters or other filters. The solids-gas separation compartment can contain a tangential cyclone separator or another type of solids-gas separator.

Abstract: A vacuum collector is provided comprising a suction hose, a first drum with a cover having a cylindrical head capable of generating powerful, small-diameter cyclones, a second drum capable of generating large-diameter cyclones, and a stack of three modules containing vacuum-producing motors atop a HEPA filter atop primary filters. The suction hose is connected to the inlet of the small-diameter cyclone-generating head on the cover of the first drum. The stack of modules containing motors, HEPA filter, and primary filters is mounted on the second drum. The two cyclonic drums communicate through a flexible vacuum hose. When the vacuum-producing motors pull air from the interior of the vacuum collector, the suction hose sucks atmospheric air mixed with contaminants from a surface into the head, which spins the contaminant-laden air-stream into a powerful, small-diameter cyclone.

Abstract: A mobile debris collection machine which has an improved filter system includes a chassis, wheels for supporting the chassis, an operator controlled debris pickup on the chassis and a debris container on the chassis. There is a vacuum system for carrying debris from the pickup to the container, with the vacuum system including a vacuum fan located above the debris container for creating an air stream that moves dust and debris from the pickup toward the container. A filter system for removing dust and debris from the airstream includes a first filter stage formed of a rotating perforated member, a second filter stage that is located downstream of the vacuum fan and includes a mesh filter bag, and a third filter stage, located downstream from the second filter stage and including a pleated panel filter.

Abstract: A vacuum cleaner having a dirt collecting system including a latch to seal a positively pressurized dirt cup. The latch also serves to secure the dirt cup to the cleaner housing when in the closed position. The dirt cup is formed with a first dirt collecting chamber and a second dirt collecting chamber separated by an apertured wall. An inlet opening is formed in the dirt cup and communicates with the first dirt collecting chamber for inputting a stream of dirt laden air into the first dirt collecting chamber. An exhaust opening is formed in the second dirt collecting chamber for allowing the filtered air stream to exit the dirt cup. The aperture wall includes a pre-filter for filtering coarse particles from a stream of dirt laden and depositing the coarse particles in the first dirt collecting chamber. A filter member is positioned within the second dirt collecting chamber and communicates with the exhaust port.

Abstract: A built-in wet/dry vacuum system includes a canister having an inlet port, an air outlet port, and a liquid outlet port. The canister bounds a chamber configured to hold a liquid. A transfer conduit couples with the canister though the inlet port. The first end of the transfer conduit is configured to couple with a vacuum hose and select adapters. A vacuum motor is coupled with the canister so as to produce a relative vacuum within the chamber when the vacuum motor is turned on. A float switch is disposed within the chamber and is electrically coupled with a vacuum motor. The float switch is configured to selectively turn the vacuum motor on and off based on the level of the liquid within the chamber. A check valve is coupled with the liquid outlet port. The check valve precludes the passage of liquid therethrough when the vacuum motor is turned on and enables the discharge of liquid therethrough when the vacuum motor is turned off. A fluid line is coupled with the transfer conduit adjacent to the canister.

Abstract: A cyclonic dirt cup assembly for a vacuum cleaner has a generally conical truncated cone positioned within a dirt cup of the vacuum cleaner. The dirt cup has a wall formed with an air inlet opening for receiving a stream of dirt-laden air within the dirt cup. The cone is pivotally connected to a frame member which is removably mounted within the dirt cup. A baffle extends outwardly from a wall of the cone and is positioned adjacent the air inlet opening of the dirt cup for directing the stream of dirt-laden air in a cyclonic manner. The baffle includes a top wall, a side wall and a bottom wall. The baffle walls, the wall of the dirt cup and a wall of the cone form an air directing compartment which receives the dirt-laden air input through the inlet opening.

Abstract: A hard bag cleaner door is disclosed having air directing rib vanes integral with its inner surface. These vanes take the form of, alternately, angled J-shaped ribs and short straight interleaved ribs. All the ribs are stepped so that the flow passage for air moving along the interior side of the bag door diverges as more bag air is introduced to it so that it directs efficiently air flow to a lower disposed motor-fan section of an adjoining hard bag portion. In a second embodiment, an exhaust opening is formed in the hard bag cleaner door below the air directing rib vanes and is covered by a final filter and final filter door. The air moving along the interior side of the bag door is directed out the exhaust opening, through the final filter which filters small dust particles which may be present in the exhaust air and out vent openings formed in the final filter door.

Abstract: My invention comprises a two element filter bag which includes a cylindrical outer element, a generally tubular inner element, a joining means, a securing means, and a diverting means. Cylindrical outer element is hollow, constructed of suitable filter media, and has first and second open ends. Tubular inner element is also hollow, constructed of suitable filter media, and has one closed end and one open end. Tubular inner element is positioned within cylindrical outer element so that the first open end of the outer element is generally coplanar with the closed end of the inner element, and the second open end of the outer element is generally coplanar with the open end of the inner element. Joining means joins the second open end of the outer element to the open end of the inner element. Supporting means is positioned within the inner element through open inner element end and provides support to inner element.

Abstract: An integrated powder collection system for paint spray booths is provided for paint spray booths having a floor through which overspray and air are exhausted. The powder collection system includes at least two sloped surfaces disposed beneath the floor for defining at least one longitudinal slot therebetween. At least one longitudinal air slide is disposed beneath the at least one slot, and a pulsed vacuum source is connected to a filter cassette which is disposed beneath the floor and laterally to a side of a space defined vertically below the at least one longitudinal slot.

Abstract: An apparatus for processing a particulate material containing an inflammable component, such as ethanol or another solvent, comprises a fluidized bed chamber with a perforated bed plate arranged therein. The particulate material may be fluidized on the bed plate by supplying fluidizing air upwardly through perforations in the bed plate. In order to reduce the risk of explosion in the fluidizing air after its passage through the fluidized bed formed on the bed plate, dilution gas is fed into the fluidized bed chamber. The dilution gas is introduced into the fluidized bed chamber at least at one position spaced from the side walls of the chamber and preferably located centrally within the fluidized bed chamber in order to obtain a substantially uniform mixing of the dilution gas with the fluidizing air including the inflammable component immediately above the fluidized bed. The explosion safe gas mixture may be discharged from the upper part of the processing chamber.

Abstract: This invention introduces a new series of vacuum cleaners or a special cover for them in which the unit will have a mechanism to prevent polluted air going out via the walls of the collection bag of the commonly used vacuum cleaners to enter into the house. This method uses different methods such as burning the smaller particles and elimination of the burned gases to prevent pollution of the room air. This unit is believed to be very beneficial in preventing the problems due to the release of these small particles into the room.

Abstract: A filter apparatus having a filter bag subassembly for collecting contaminating material. The filter bag sub-assembly includes five diametrically and axially-spaced bags and an integral collar. The five spaced bags form five spaced chambers and the integral collar has a stepped shape forming five cylinder support portions for the five spaced bags.

Abstract: A mist collector for separating liquid components from a mist-laden gas stream to include a housing which houses three filter or separation stages. The stream is pumped through ducts into the bottom of the housing, and is pulled upwardly through the filter stages. The third filter stage comprises a commercially available filter assembly with a plurality of filter envelopes having bottom open ends secured across a midposition of the housing and upper closed ends supported adjacent the top of the housing. A doorway provides access to the inside of the housing. The upper closed ends of the envelopes are supported by hanger rods which connect to horizontally movable slides which slide within horizontal channels mounted to the internal side walls of the housing. The slides extend partially out through the doorway to enable the assembly to be connected to and disconnected from the collector outside of the housing.

Abstract: The mobile separation unit, for separating particulate solids from a transport gas, has a filtration housing for separating the solids from the transport gas connected to a vacuum pump or air compressor for inducing the flow of transport gas into the housing. The housing is mounted such that it is movable between a stowed position and operating position, the center of gravity of the housing in the stowed position being below its center of gravity in the operating position thereby improving the stability of the unit during transportation.

Abstract: An electrostatic precipitator includes a plurality of collector sections having parallel collection plates, defining gas flow lanes therebetween, and a bag filter section containing a plurality of parallel, elongated filter fabric bag elements. A plurality of corona discharge wires for charging solid particulates entrained in the gas flow entering the bag filter section are disposed parallel to and interspersed among the bag elements. Both the bag elements and the corona discharge wires within the bag filter section depend from a common plate member. Gas flow is from the outside of the bag elements to the inside and out through apertures in the supporting plate.

Abstract: A dust collector for removing particles entrained and transported in a flow of transport air which comprises a housing having a generally cylindrical chamber with a tangential inlet for introducing the transport air and causing it to assume a helical flow path within the chamber. A plurality of vertically extending cylindrical filter elements are disposed within the chamber, and conventional reverse pulse-jets are provided for periodically cleaning the filter elements by creating a reverse flow of air outwardly therethrough. A wall arrangements is provided adjacent each filter element to create a flow channel that directs the outward flow cleaning air and particles removed from the filter elements thereby in a direction toward the main helical flow path of the transport air to substantially reduce re-entrainment of the removed particles.

Abstract: An improved gas stream inlet construction for industrial dust collectors such as fabric filter type collectors that includes a first transition section in which an incoming high velocity gas stream is reduced in velocity and delivered to a second transition section in a second flow direction substantially perpendicular to the incoming first flow direction and wherein it is further reduced in velocity and is delivered therefrom in a third flow direction substantially perpendicular to both the first and second flow directions.

Abstract: The air in which the oil particles are suspended is drawn from the environment through an air intake (4) as a result of the vacuum created by a centrifugal aspirator (11) and then passes along a substantially vertical duct (5) in which an internal helical element (6) causes the mechanical separation of the oil particles by centrifugal action due to the rotation of the air imparted by the helix, the oil particles collecting on the wall of the duct (5) from which they drain into a collecting hopper (2), after which the air is further filtered by an additional filter (9, 10) before reaching the delivery opening (13).

Abstract: A vacuum cleaning system having a receptacle of non-porous material, such as a plastics bag (65), adapted to safely receive and hold hazardous material such as asbestos fibre. Vacuum is applied by a fan (86) to a suction chamber (69) and then through a filter (71) to an intermediate chamber (63) and via a suction pipe (61) to the bag (65). Waste material is sucked into the bag through an inlet pipe (67). The filter is cleaned periodically by admitting atmospheric air through a pulse valve (74) causing an inrush of air through the filter (71) and into the bag (65), cleaning the filter and intermediate chamber (63).

Abstract: An improved gas stream inlet construction for industrial dust collecting apparatus such as fabric type gas filters that includes at least one velocity reducing transition section employing a selectively positioned expanded metal grid as a flow diverting and gas stream diffusing device located at the exit port thereof.

Abstract: An improved gas stream inlet construction for industrial gas treating apparatus such as fabric type dust collectors that includes two series arranged velocity reducing transition sections employing expanded metal grids as flow diverting and gas stream diffusing device as the exit ports therefrom.

Abstract: A filter system that is portable and has no moving parts usable for industrial purposes to filter dry fluid substances such as Barite, Hemitite, cement and the like. Within a filter housing are a cyclone separator for removing heavier substance and a fine filter for filtering lighter powdery substance. The inlet to the housing is connectable to the vent of a storage receptacle to which substance is being transferred under the power of a blower. The blower creates the stream that causes substance to flow through the filter system so that no other power means is required. To purge the filter system, a normally capped outlet is connected directly to the storage receptacle and a vent port from the filter housing is connected directly to the blower means. The blower means is operated in spurts to create bursts of air in a direction opposite to the filtering direction to dislodge powder from the fine filter and blow the powder and heavier particles from the filter housing directly into the storage receptacle.

Abstract: An industrial vacuum cleaner, having a structure in the form of a trolley with a platform (1) on wheels (2) supporting a base (3) on which is seated an electric motor (4) connected to a radial compressor or vacuum pump (5). Two horizontal tubes (16) are connected to the front of the platform (1) and joined by two crossbars (17). At the extremities of the two horizontal tubes (16) there are casters (38). Both crossbars (17) are connected to two vertical tubes (18 and 19) of the same height, with U-shaped sockets (20 and 21) at the top end. These U-sockets are provided for slotting in segments of coaxial axle pins (22 and 23) which are placed on diametrically opposite sides of the drum (9). There are also handles (24) on either side of the drum.

Abstract: A system for transferring dry flowable material includes a substantially closed transfer vessel adapted to have particulate material drawn therein by a suction line during a fill cycle and discharge the material upon selective pressurizing of the vessel. A filter containment housing is integral with the pressure vessel and houses a filter element arrangement internally of the vessel to filter particulate material from air drawn to the suction line while optimizing the material capacity of the transfer vessel. Pneumatic pressure is introduced to the upper and lower ends of the transfer vessel to establish a predetermined pressure differential across a lower fluid pressure inlet, and provision is made to effect a dual action cleaning of the filter elements so as to maintain optimum efficiency. A bypass system is operative to maintain a predetermined design pressure within the vessel.

Abstract: A hopper gas distribution system (10) is provided for dispersing particulate laden gas in an equal flow rate around or into a plurality of filter bags (16) maintained in a bag house above a hopper housing (12). Particulate laden gas enters the hopper housing (12) through an inlet conduit (18) and is directed in an upward vertical direction (24) by a plurality of turning vane members (30) mounted within the hopper housing (12) in a longitudinally displaced as well as vertically displaced manner, each with respect to the other. Below the turning vane members (30) and the inlet conduit (20) is mounted a plurality of blocking vane members (42) secured to opposing transverse sidewalls (32 and 34) of hopper housing (12). The blocking vane members (42) create a false bottom floor which further impedes particulate laden gas from passing down into a lower section of the hopper housing (12).

Abstract: An electrostatic powder coating installation which includes a cabinet accommodating a device for producing electrostatically charged powder, with a filter strip being disposed in the cabinet at a bottom end thereof. A first suction fan, covering a large portion of the bottom area of the cabinet is provided for producing a suction field in the cabinet with an underpressure by virtue of the provision of the filter strip. A cleaning apparatus or nozzle, associated with the filter strip, removes surplus powder lying on the filter strip. A device is provided for drawing the filter strip along at least one length of the cabinet when pigments in the powder change thereby assigning a specific zone of the filter strip to each pigment. A powder recovery installation includes a basic frame or housing which accommodates a powder container, a filter, a sifting machine, and a basket for the sifting material. The basket for the sifting material is adapted to be easily replaceable.

Abstract: The present invention relates to an apparatus for filtering solid matter from a gas. It particularly relates to improvements in bag house type filters for use in cleaning gas streams. There is provided a gas filter apparatus consisting of, in combination, a chamber having a top, base, and side walls, a conveyor tube for passing the solid laden gas into the chamber and centrally of a partition wall dividing the chamber into upper and lower compartments, gas and solid matter exit ports on the conveyor tube, in the lower compartment only, for use in distributing the gas and solid matter from the conveyor tube and directing at least a portion of the solid matter toward the base by gravity. The partition includes a number of openings communicating the upper and lower compartments, and filter tubes are provided in the lower compartment covering the openings.

Abstract: A dust collector including two tubes which communicate through an interconnecting conduit. A first tube operates as a cyclone which separates a great fraction of dust or solid components from the incoming air and collects the same in a bag at the bottom of the tube. The second tube includes a filter unit composed of a coarser filter as well as a surrounding fine filter, the filter unit receiving the pre-purified air from the cyclone tube through the interconnecting conduit and separating the remaining dust particles therefrom.

Abstract: A vacuum cleaner including a dust chamber, a vacuum chamber and a source for producing low pressure in the vacuum chamber, wherein the dust chamber and the vacuum chamber are partitioned by a first filter unit, and wherein the vacuum chamber is provided with a secondary filter unit in which at least one filter element is suspended from the ceiling of the vacuum chamber radially thereof. A rotary shaft is provided at the center of the radially arranged filter elements, the rotary shaft radially supporting vibrating vanes, each of which is designed to vibrate each filter element of the secondary filter unit on its inner peripheral portion, thereby causing the dust entrained therein to fall off by vibration. The rotary shaft is additionally provided with a single vibrating arm horizontally extended so as to vibrate each filter element of the secondary filter unit on its bottom portion.

Abstract: A vacuum cleaner and refuse and debris collection and disposal device and system utilizing a vacuum cleaning unit, with intake for both wet and dry materials, utilizing a motor-driven blower to create a vacuum in a sealed vacuum chamber and a separate internal debris collection container which is removable without disturbing the sealing properties of the vacuum chamber. The container is alternatively emptyable or disposable, thereby providing minimal interruption in the operation of the vacuum cleaner unit, no relocation of the unit when dumping is necessary and the use of replaceable, or disposable internal collection containers subject to wear and tear without disturbing the sealing properties of the vacuum chamber.

Abstract: Particle-laden gas passes downwardly through an inlet duct into inlets of several wedge-shaped deceleration chambers formed by vertical plates radiating from a central region below the bottom of the inlet duct. The inner ends of the plates and the inlet of the chambers are vertically below the bottom of the inlet duct. In each chamber the gas first proceeds towards a particle exit at the bottom of the chamber, then reverses direction and passes upwardly into filter units above wider parts of the chamber, depositing some heavy particles near the particle exit. To purge the chambers and filter units, a suction device is connected to an outlet duct and one or more inlets to the chambers are closed off from the inlet duct simultaneously with the particle exit(s) of the same chamber(s) being connected to the outlet duct.

Abstract: Effluent with entrained particles is drawn through a filter module (A) by an exhaust blower (B). The filter module includes an inertial separator (C) for providing an inertial separation of particles from the effluent air and a plurality of filter cartridges (D) which allow air to pass therethrough but not particles. A plenum E interconnects the filter cartridges with the exhaust blower to channel the filtered air from the filter module to the exhaust blower. A flow controller (F) controls the flow rate of air through each of the filter cartridges maintaining it substantially constant. The flow controller includes a flow rate sensor for sensing the flow rate through each filter cartridge and a butterfly damper blade for selectively restricting the plenum to maintain the flow rate substantially constant. A filter cartridge cleaner (G) is selectively actuated when the flow controller is unable to maintain a preselected minimum flow rate.

Abstract: This invention relates to a device at a dust filter for cleaning a gas flow from dust. The dust filter consists of an electrostatic precipitator or fabric filter (bag filter) and comprises a filter chamber (10) with gas inlet (12) and gas outlet (13). At the gas inlet a precollector (30) in the form of a louvre collector (31) is located for separating coarse dust, i.e. dust with a diameter exceeding 50-75 microns. In the order to obtain good collection at the louvre collector (31), the collected dust is evacuated by means of a partial gas flow, which is passed to a dust hopper (34) and a dust discharge unit (35). According to the invention, the dust discharge unit (35) comprises a cyclone collector (36), the inlet portion (37) of which is integrated with the dust hopper (34), and the outlet portion of which or central pipe (38) is formed with a passageway (39), the mouth (40) of which is located in the filter chamber downstream the louvre collector.

Abstract: An apparatus for separating solid impurities from a fluid, such as air, comprising a housing, a set of filter elements fixed on a set of perforated sleeves, a fan with a driving electric motor, a louvered cyclone positioned around the filter elements, a centrifugal coupling designed to automatically connect the set of perforated sleeves with the shaft of the electric motor, and a receptacle for impurities separated from the air by the apparatus.

Abstract: An industrial vacuum cleaner is disclosed. The vacuum cleaner comprises a housing having an inlet port, means for creating a vacuum in the housing to suck dust into the housing, means located in the housing adjacent such inlet port for separating any liquid or snow which may be drawn up with the dust, and a filter, also located in the housing, for collecting the dust.

Abstract: The invention relates to a tubular filter element for use in an ultra filtration plant. The element is in the form of a tube of woven fabric which is napped on its internal surface. A cellulose filter aid is deposited, on the nap and the resulting filter element has a high collection efficiency and low filter drag making it particularly suitable for use in an air recirculation plant. The air is drawn from a working area and passed through a conventional primary collection unit and then through an ultra filtration unit containing an array of the filter elements. It is then sufficiently clean to be passed back to the working area, preferably through a HEPA filter, and this results in a substantial saving in heat energy which would otherwise be wasted.

Abstract: A vortical-type separator for removing from the gas stream suspended particulates present in the gas stream has an internally generated scavenging gas flow and a pulse jet system for cleaning scavenging gas filter elements. The separator has two or more conduits that are coaxially positioned with an annular clearance at their ends. A gas swirl device creates a swirling motion, causing heavier particulates to be discharged out the annular clearance or ejection port into a scavenging gas plenum. A flow path is created between the scavenging gas plenum and the outlet of the separator, with the pressure differential between the outlet and the ejection port causing scavenging gas to flow to the outlet. A frame is mounted in the flow path over which a bag filter is secured. The dust-laden scavenging gas flows through the bag filter and out the outlet. A nozzle is positioned at the mouth of the bag filter for periodically discharging a pulse of clean gas into the bag filter reverse to the flow of the scavenging gas.

Abstract: An apparatus for utilizing the heat and humidity from an electric clothes dryer to heat and humidify an enclosure consists of a container having two openings, one entrance opening communicating with one end of a flexible conduit, the other end of the flexible conduit being capable of attaching to the exhaust outlet of an electric clothes dryer, the second exit opening, having a filter attached thereto, communicating with the enclosure atmosphere.

Abstract: An apparatus for the separation of particles from a gas of the type which has filter elements disposed around a drum located in the center of a housing with a shutter mechanism. The improvement of the present invention also relates to an apparatus which allows separation and emptying of filter elements by the shutter mechanism and particle separation without venting of particles to the atmosphere. The apparatus is particularly useful for instance, for asphalt mixing plants, stone quarry or foundry dust separation and collection.