Abstract: A vacuum cleaner includes a first housing defining a cyclonic airflow chamber and a second housing defining a main suction opening that is in communication with an inlet of the cyclonic chamber. A suction source has a suction airstream inlet in communication with an outlet of the cyclonic chamber, and establishes a suction airstream that enters said main suction opening, passes through said cyclonic chamber, and passes to an outlet of said suction source. A substantial portion of particulates entrained in the suction airstream are separated therefrom when said suction airstream moves in a cyclonic fashion through the cyclonic chamber.

Abstract: A flue gas inlet duct into a separator cyclone, the duct having two lateral faces one of which is referred to as the “extrados” face and the other of which is referred to as the “intrados” face, the intrados face terminating at the tip of the cyclone, the duct also having a top face and a bottom face, wherein at least one of the intrados face and the extrados face has sloping grooves extending downwards from the outlet of the furnace towards the cyclone separator.

Abstract: A particle separation member is provided for use with a cyclone separator. The particle separation member divides the separator into a cyclone chamber and a particle receiving chamber. The cyclone chamber and the particle receiving chamber communicate via a plurality of apertures in the particle separation member. The separation member comprises two cooperating members movable between an open position and a closed position to provide access to the particle receiving chamber to empty the collected contents therefrom.

Abstract: A high-efficiency secondary cyclone separator used in combination with a high-efficiency primary separator produces a gas stream having low liquid content in gas for a feed stream having either a high or low liquid loading. A high surface area to volume coalescing material is combined with the secondary cyclone separator to create a more efficient gas-oil centrifugal separator system.

Abstract: A method for filtering a dirty air stream in a vacuum cleaner to obtain a clean air stream has subjecting the dirty air stream to a first cyclonic separation stage to obtain a partially cleaned air stream and subjecting the partially cleaned air stream to a second cyclonic separation stage and an electronic filtration stage to obtain the clean air stream.

Abstract: A particle separation member is provided for use with a cyclone separator. The particle separation member divides the separator into a cyclone chamber and a particle receiving chamber. The cyclone chamber and the particle receiving chamber communicate via a plurality of apertures in the particle separation member. The apertures have baffle members for reducing the flow of fluid in the particle receiving chamber.

Abstract: A fluid level measuring device for measuring a fluid filling level in a container contains a float disposed in the container and a magnet disposed in the container. The magnet is coupled to the float in terms of movement and, in the event of a change in the fluid filling level, executes a movement that corresponds to a change in fluid level. A magnetic field sensor is disposed in a zone of influence of magnetic field generated by the magnet and outputs an electrical signal which is representative of a height of the fluid level.

Abstract: An apparatus for separating a suspension, comprising a collection vessel; and a cyclone fixably received within the collection vessel, the cyclone having an inlet for receiving the suspension, a wall having at least a filter medium for separating the suspension into at least two components, and a lower underflow outlet for dispensing one of the two components, wherein the filter medium is porous and in communication with a catalyst, a hydrophillic, or hydrophobic material.

Abstract: A fluid separator for separating a liquid such as oil/water from air delivered from a compressor during the condensate drain cycle of the compressor.

Abstract: A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary mechanism driven by the motor for creating a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing large solid particles from the air. The vacuum cleaner also has an improved filter, wherein the improved filter includes a layer of material to remove very fine air particles and a layer of material to remove odors from the air.

Abstract: The invention is directed to a mobile arrangement for cleaning contaminated air. The arrangement has a blower unit, a filter unit, supply air lines and discharge air lines. During the cleaning process, surrounding air is sucked in by the blower unit, guided through the filter for cleaning, and finally guided out of the arrangement again. The filter unit (2) has at least one cylindrical filter element (15, 16, 17) in which an activated charcoal filter (17) is arranged at the outer side of the cylinder jacket and a solids filter (15, 16) is arranged at the inner side of the cylinder jacket.

Abstract: An air powered flush machine capable of circulating a highly volatile flushing solvent through an air conditioning system or system components and then also capable of circulating a high volume of air through the system or components, to blow the solvent out of the components and thoroughly dry the system or components, without emitting an objectionable level of odour or hazardous level of fumes through the machines air exhaust outlet. The machine utilizes a receiving tank design which separates liquid solvent from the air flow before exhausting the air through its exhaust filter.

Abstract: Method and apparatus for creating a cyclonic action within a cannister. Communication of air between a first truncated conical member with a hole or opening located in its central area and the inside of the lower casing of the cannister takes place using an annulus between the outside of the conical member or, alternatively, by using holes or openings extending through the conical member. Transition areas create lower pressure areas which attract debris laden air downwardly so as to deposit the debris in the lower pressure area of the cannister.

Abstract: A vacuum cleaner cyclone separator having a cyclone with a first end wall, a second opposite end wall (35,36,135), and an intermediate part (38,130), which has the shape of either a cylinder or, at least partly, an up-side-down truncated cone. The intermediate part has an outlet opening (39,131) for particles through which particles separated by the cyclone leave from the intermediate part toward the second end wall. The cyclone is, close to the first end wall, provided with a generally tangentially-directed air inlet (33,129) for dust laden air and also has a tube shaped air outlet (50,142) extending from the first end wall (35) toward the intermediate part and communicating with a vacuum source (15,111).

Abstract: A device is disclosed for the quick separation between solid materials and reaction gaseous materials which comprises a vertically oriented inner cylindrical body with a closed end, which cylindrical body forms at the other end an inlet through which a mixture of the catalyst and the gaseous material is introduced and a substantially airtight outer cylindrical body disposed coaxially with said inner cylindrical body in surrounding relation thereto and forming at the upper portion a gas-discharging port communicating with the outside of the device and at the lower port a particle-discharging port communicating with the outside of the device, the inner cylindrical body being provided in the side surface with a plurality of elongated slits extending in the axial direction and spaced equally apart in the circumferential direction and a plurality of curved or flat guide vanes protruding outwardly from the proximity of the longitudinal edges of the slits at a certain angle with respect to the radial direction of th

Abstract: A terminal insert for a cyclone separator for separating a material from a fluid. The terminal insert has a distinct member positioned within the cyclone separator to impinge upon at least a portion of the fluid as it rotates within the cyclone separator to destructively interfere with the rotational motion of the fluid within the cyclone separator.

Abstract: An apparatus for separating solids, such as scrap material, from a gas such as an air stream. The apparatus includes a horizontally mounted outer cylinder or drum and an inner perforated cylindrical member is mounted concentrically within the drum to provide an annular space therebetween. High velocity air containing scrap material is delivered through one or more tangential inlets to the annular space and the heavy scrap material is thrown outwardly by centrifugal force along the inner surface of the drum and discharged through a tangential outlet, while the air passes inwardly through the perforated member and is discharged through an axial outlet in the drum. The scrap material being discharged from the separator is fed to the lower end of a closed, inclined auger and conveyed upwardly and discharged into a surge tube of a baler where the scrap is converted into bales.

Abstract: A separator device (3) provided with a cyclone chamber (11, 79) for separating solid and/or liquid particles from a gas flow. The cyclone chamber (11, 79) has an upper wall (49) in which an outlet opening (15) is present, and a substantially rotationally symmetrical side wall (47, 81) in which an inlet opening (13) is present adjacent the upper wall (49). A discharge opening (17, 85) for the separated solid and/or liquid particles is present at a side (55, 83) of the cyclone chamber (11, 79) remote from the upper wall (49). According to the invention, a rotatable annular centrifugal unit (61, 87) is arranged in the cyclone chamber (11, 79) around the outlet opening (15) near the upper wall (49), by means of which unit a short-circuit flow running directly from the inlet opening (13) to the outlet opening (15) in the cyclone chamber (11, 79) is prevented. The efficiency of the separator device (3) is considerably improved thereby.

Abstract: A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary mechanism driven by the motor for creating a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing large solid particles from the air. The vacuum cleaner also has an improved filter, wherein the improved filter includes a layer of material to remove very fine air particles and a layer of material to remove odors from the air.

Abstract: An air inlet for a dust collector wherein a scroll inlet duct and an associated cylindrical duct are mounted on the top wall of the dust collector housing so that dust-laden gas flows into the scroll duct and through the cylindrical duct resulting in a rotational path of downwardly flowing gas within the cylindrical duct providing a centrifugal force on the gas so that when the dust-laden gas enters the collector housing it spreads outwardly toward the walls of the collector housing and downwardly resulting in a substantial cloud of uniform flow of dust-laden gas over the length and width of the collector housing to provide a uniform deposit of dust particles on the filters while precluding abrasion of the filter media. A perforated metal plate is positioned in the collector housing in proximity to the outlet of the cylindrical dust to facilitate the outward and downward flow of dirty gas in the collector housing.

Abstract: A gas transfer pipe arrangement includes a pipe in which gas containing droplets flows. A centrifugal force type separation unit is provided in the pipe for applying a radial centrifugal force to the gas flowing in the pipe so that the droplets in the gas adhere to an inner periphery of the pipe to be separated from the gas. A liquid collecting unit is annularly provided on the inner periphery of the pipe at a position downstream of the centrifugal force type separation unit for collecting a liquid from the droplets separated by the centrifugal force type separation unit. A discharge unit is provided at a lower side of the pipe for discharging the liquid collected by the liquid collecting unit to the exterior of the pipe.

Abstract: Domestic vacuum cleaner with multiple cyclones arranged in cascade, in which a first tangential cyclone supplied with a flow of dust-laden air captures the coarser particles in a first container arranged below said first cyclone and discharges the air flow, partially purified, into a first internal duct coaxial with the first cyclone and housing an axial swirling device which concentrates the residual particles in a peripheral fraction of the flow, which is conveyed by a capturing ring into a second tangential cyclone, while the residual fraction of flow passes through the ring and is conveyed by a second duct, axially aligned with the first duct, to a suction unit.The captured fraction of flow conveyed into the second cyclone deposits the residual particles in a second container arranged below the second cyclone and thus purified is sucked into the second duct by the fraction of flow passing through the ring, which acts as an extractor nozzle.

Abstract: In a centrifugal separator for separating a liquid from a compressed gas, a baffle is provided to separate the centrifugal chamber into an upper sub-chamber and a lower sub-chamber but does not contact the walls of the chamber thereby being insufficient to prevent downward flow of separated liquid along the interior wall of the two sub-chambers, and insufficient to prevent flow of compressed gas from one sub-chamber to the other sub-chamber, the baffle nevertheless being sufficient to prevent turbulent gas flow in the lower sub-chamber when collected liquid is drained therefrom.

Abstract: A cyclone type dust collector having a raw air intake aperture, an air separating chamber including a cylinder of upper part and a reversed circular cone of lower part, inner and outer clean air exhaust ducts, the bottom of the air exhaust ducts being closed, the bottom of the reversed circular cone being opened, the exhaust ducts coaxially disposed passing through the air separating chamber, and the surface of the exhaust ducts being provided with many small holes or mesh, small balls or the like being filled between the outer and inner clean air exhaust ducts.

Abstract: An air dehumidifying apparatus having a cyclone separator, a primary filter, a secondary filter, and a separation membrane element made of a special high polymer for passing steam smoothly and hardly passing air. The elements of the apparatus are disposed in a flow direction of air, so that the air may pass sequentially. Also, a casing is provided for forming an outer wall of the cyclone separator and accommodating the primary and secondary filter and separation membrane element. Large particles of oil, moisture, dust and other foreign matter are removed by the cyclone separator. As a result, the life of the primary filter is extended. By putting the filters and separation membrane element into one casing, the apparatus is reduced in size, and is installed easily.

Abstract: A high efficiency compact gas-particulate separator is provided comprising: a bag filter disposed above and a cyclone disposed below,the bag filter including: a casing, a compressed air header into the casing; a diaphragm valve on the header; a blow tube connected to the header; a venturi for accelerating an ejected jet of compressed air from the blow tube and for inducing an inflow of secondary air; and a filter bag for collecting dusts mounted in the casing; the casing having a clean air outlet, andthe cyclone including: a dust-laden gas inlet; an outer cylinder for generating a centrifugal force, the cylinder being connected to the casing; an inner tube for letting a dust-laden gas pass from below upward into the casing; and a dust hopper for storing dust particles captured by centrifugal forces and dislodged dust cakes removed from the filter bag by cleaning.

Abstract: A gas elimination system includes a gas elimination device and a priming system. The gas elimination device includes a vortex chamber that forms a vortex in the fluid flowing into the chamber and a particulate filter that removes particles from the fluid. The particulate filter is located in the vortex chamber such that the vortex is formed in a substantial volume of the chamber before it encounters the particulate filter. When the fluid encounters the particulate filter, the vortex is generally stopped, and additional released gasses rise through the open top of the particulate filter. The device also includes an outlet chamber connected to the vortex chamber, and the particulate filter extends into the outlet chamber. A check valve is located at the outlet of the outlet chamber to shut off flow when the device contains excess gas. The priming system in the form of a pillow block is arranged to force air or fluid upward to dislodge the check valve, should it become stuck in the valve seat.

Abstract: A cyclone, in particular a cyclone collector and a cyclone classifier having an arrangement disturbing the gas-particle flow in the inlet area of the inlet casing or in the cylindrical part of the housing. This flow disturber effects a deflection and dispersion of the dense material flow, whereby improved separation, in particular of the finest particles, is facilitated without significant reduction damage of the powder collecting efficiency. The flow disturber can be a prism-type flow disturber, a flap of a blowing arrangement.

Abstract: A cyclone dust collector wherein the interior of a cyclone body is divided into an upper space and a lower space by a partition member provided with a plurality of cylindrical filters, a suction port is so provided as to communicate with the lower space, a common discharge port is so provided as to communicate with the upper space, a collected dust recovery box is fixed to the lower end of the cyclone body, and a discharge blower is connected to the discharge port of the cyclone body. The dust collector is further provided with backwashing stop valves capable of opening and closing upper end portions of the filters and having backwashing nozzles, stop valve driving mechanisms adapted to open and close the stop valves, compressed air hoses connected to the backwashing nozzles of the stop valves, and backwashing electromagnetic valves for controlling the supply and cutoff of backwashing compressed air to the compressed air hoses.

Abstract: A cyclone separator is disclosed having a vertical housing (2), an opening at its lower end (4), provided with a cover (5) at its upper end having a central opening (8), an inlet duct (10) for tangential entry of a mixture of gas and catalyst particles from the outlet (12) of a riser reactor (15) of a fluidized-bed catalytic cracking plant, a particles discharge duct (16) communicating with the open lower end (4) of the vertical housing (2), and a gas outlet duct (18) having a vertical section (20) which extends through the central opening (8) in the cover (5), which cyclone separator (1) further having an open-ended pipe (23) arranged in the central opening (8) to define an annular gas inlet conduit (25) between the vertical section (20) and the open-ended pipe (23), and swirl imparting means (30) arranged in the annular gas inlet conduit (25).

Abstract: An accessory for a vacuum cleaner having a vacuum source (21) and an inlet tube (18) or the like entering into a chamber (15), the inlet tube communicating with a nozzle opening (11) and being normally connected to a dust container (16), the chamber having an opening which is normally covered by a lid (17). The accessory is a separate unit which is removable secured to the vacuum cleaner and includes a cyclone separator. The accessory has an inlet side (32) that can be connected to the inlet tube (18). The accessory has a liner (25) to which a container part (27) is removably secured. The container part includes a first container (45) in which particles separated by the cyclone are collected and a second container (46) operable to collect particles separated by a coarse separator.

Abstract: An ultra-filtration vacuum system with a first liquid stage filter and that has structure to direct particle laden air into a vortex in a circular cyclone chamber over a surface of a first liquid filter medium to direct particulates in the air to a wall of the cyclone chamber for collection by the first liquid filter medium. An open-pore labyrinth filter is provided for further filtering air from the first liquid stage. A second liquid stage is provided to filter for filtering air from the labyrinth filter and has a dispersion chamber with an inlet that directs the particle laden air from the labyrinth filter directly into a second liquid filter medium to transfer momentum of the air directly to the second liquid filter medium, the dispersion chamber constructed with surfaces against which medium is propelled by the energy of the injected air to disperse the medium in the air, the dispersion chamber shaped such that a cascading and undulating liquid surface is formed.

Abstract: An apparatus and method of reclaiming particles of powder material from a powder spray system (100) having an inlet passageway (190) of a collection subsystem (104) in fluid communication with an interior of a spray booth (108). An airflow conduit (250) extends between a trough (140) located under a conveyor belt (130) which in turn is located below the spray booth (108) and the inlet passageway (190) of the collection subsystem (104). Airflow through the airflow conduit (250) is augmented by a compressed air injector (280) disposed in the airflow conduit (250) and oriented so that it ejects compressed air in the direction of the inlet passageway (190). In this manner, particulate matter (overspray) settling in the trough (140) becomes entrained in an airstream (252) flowing into the collection subsystem (104). The collection subsystem (104) suitably includes a cyclone separator (170) and a filter stack (200).

Abstract: A body furniture is provided having one or more air exhaust ports and a built-in air fan. A top plate having one or more air suction port is positioned on the furniture body, and a tornado-based suction unit is removably placed on the one or more of the air suction ports. The tornado-based suction unit includes a cylinder having a window formed through a peripheral wall thereof, and a suction hole formed through at least one of end surfaces of the cylinder connected to a suction side of the air fan. An artificial tornado is generated within the cylinder and collects contaminated air such as the smoke of cigarettes. The collected contaminated air is cleaned. Minus ions or fragrance may be supplied to air sucked from the suction hole to fill a space around the body.

Abstract: The invention provides a shroud (10; 40) for use in apparatus incorporating a cyclonic dust separation divice for separating dirt and dust from an airflow, the shroud (10; 40) having a perforated portion (14; 44) having a multiplicity of perforations (30; 46) for allowing the airflow to pass therethrough. According to the invention, the upstream edge of each perforation (30) meets the upstream surface (28) of the shroud (10) at a sharply defined angle. The invention improves the performance of the dust separation apparatus in conjunction with which the shroud (10; 40) is utilized.

Abstract: An apparatus for separating a suspension, comprising a collection vessel; and a cyclone fixably received within the collection vessel, the cyclone having an inlet for receiving the suspension, a wall having at least a porous section for separating the suspension into at least two components, and a lower underflow outlet for dispensing one of the two components, wherein the other of the two components is received by said collection vessel.

Abstract: A compact cyclonic filter assembly used for separating unwanted debris from a fluid. The cyclonic filter assembly uses the centrifugal forces to separate large pieces of debris from the fluid and a filter to separate the remaining unwanted debris from the fluid. The present invention can be contained in a compact single housing which may be disassembled for easy cleaning and replacement of parts. The cyclonic filter assembly of the present invention has a vertically oriented cylindrical tube which receives a tangential injection of the debris laden fluid. The tangential injection causes the fluid to circulate around a cylindrical vortex finder which is inside of and coaxial with the tube. The centrifugal forces acting on the debris causes the debris to move outward away from the center of the vortex. The vortex finder has an opening which pulls in the relatively clean fluid near the center of the vortex while the debris laden fluid settles into a collection chamber below the cylindrical tube.

Abstract: The present invention relates to a cyclone, mainly for separating liquid from gas/vapor, which is formed upon pressure reduction of spent cooking liquid in connection with pulp production. The cyclone includes an inlet arrangement connected to a supply line and a valve and the inlet arrangement includes an insertion pipe, the length of which preferably exceeds one meter.

Abstract: A self-purifying filter apparatus comprising (1) a filter having a first surface and a second surface; (2) flow control means, such as a vacuum pump, for causing a stream of fluid interspersed with solid particulates to pass from the first surface to the second surface through the filter, thereby removing some of the solid particulates from the first stream of fluid and depositing them on the first surface; and (3) a purging device, such as a small reservoir of water (potentially formed, in part, by water previously filtered by the filter), for causing a second stream of fluid to pass from the second surface to the first surface through the filter without substantially changing the position of the filter, thereby rinsing and removing from the first surface at least some of the solid particulates that were deposited there.

Abstract: A cyclone and inlet duct apparatus which includes a cyclone having a cylindrical axial portion. The cylindrical axial portion has a metallic housing and the housing has wall. The apparatus also includes a rectangular inlet duct that has an interface with the cylindrical axial portion of the cyclone. The rectangular inlet duct is disposed in fluid communication with the cylindrical axial portion of the cyclone. One side of the rectangular inlet duct is disposed in generally tangential relationship to the wall of the cylindrical axial portion of the cyclone. A first refractory material stop block extends vertically in the cylindrical axial portion of the cyclone proximate to the wall of the cylindrical axial portion and proximate to the intersection of a first side of the inlet duct and the cylindrical axial portion in substantially parallel relationship to the intersection of the first side of the inlet duct and the cylindrical axial portion.

Abstract: An apparatus (10) for separating dirt or dust from an airflow comprising a frustoconical cyclone (12) having a tangential air inlet (16) located at or adjacent the end of the cyclone (12) having the larger diameter and a cone opening (18) located at the end of the cyclone (12) having the smaller diameter is described. A collector (20) is arranged so as to surround the cone opening (18) and has a base surface (24) facing towards the cone opening (18). The distance between the cone opening (18) and the base surface (24) is between 4 and 6 mm or between 45 and 60 mm. The apparatus (10) is reduced in size without substantially affecting the separation efficiency.

Abstract: The invention provides a shroud (10; 40) for use in apparatus incorporating cyclonic dust separation structure for separating dirt and dust from an airflow, the shroud (10; 40) including a perforated portion (14; 44) having a multiplicity of perforations (30; 46) for allowing the airflow to pass therethrough. According to invention, the perforated portion (14) has a lower edge (16) and a lip (18) depending therefrom, the lip (18) including a parallel-sided portion (34) having an inclined distal end and a step (38) formed radially inwardly of the parallel-sided portion (34) and at the proximal end thereof. The invention improves performance of the dust separation apparatus in conjunction with which the shroud (10; 40) is utilized.

Abstract: The invention provides a separator for removing small particulates from an air stream, the separator includes pneumatic separator with a relatively small filter element built inside the separator to remove particulates from the air stream down to as small as one micron. The pneumatic separator relies on a vortex effect and sudden changes in direction of the air flow to strip out most of the particulates, and because the very small particulates have insufficient mass to be dislodged from the air in this way, these particulates remain in the air stream and are carried to the filter element where they build up on the element. The build up is interrupted by the incoming air which flows aggressively around the element and strips parts of the build-up off the element. This ongoing random process can be supplemented if necessary by back flushing. Both the separated particulates and those stripped off the filter element accumulate in the separator for subsequent removal.

Abstract: The invention provides dust separating apparatus (10) including a cyclone (14) having an outer wall (14a) and an air inlet (12), a shroud (16) and an airflow path, the airflow path being arranged so as to direct an airflow flowing, in use, in the dust separating apparatus into the cyclone (14) via the air inlet (12) and out of the cyclone through the shroud (16). The air inlet (12) of the cyclone (14) is formed by a conduit (12a) projecting into the cyclone (14) between the outer wall (14a) and the shroud (16). This allows a swivel coupling to be attached to the air inlet (12) providing greater flexibility and maneuverability of the dust separating apparatus (10).

Abstract: A material transfer apparatus and method, the apparatus having a material separating container, a filter unit, a vacuum unit and an exhaust unit, all mounted on a mobile conveyance. Air, carrying the materials to be transferred, is drawn through pneumatic tubing into the separating container where large and small materials are separated, and then into the filter where it is filtered for re-entry into the atmosphere.

Abstract: The invention provides a vacuum cleaner (100) including an airflow path, dirt and dust collecting device arranged in the airflow path, a motor or fan unit (110) for causing air to flow along the airflow path and also arranged therein, a first filter (112) arranged immediately upstream of the motor or fan unit (110) and a second filter (114) arranged downstream of the motor or fan unit (110), wherein the arrangement is such that, when in use the dirt and dust collecting device are made accessible or removed for emptying or replacement, both filters (112, 114) are visible to the user. This arrangement encourages the user of the vacuum cleaner to regularly maintain both filters (112, 114), thus improving the performance of the vacuum cleaner (100).

Abstract: A machine and method for separating aerosol particles in a cylindrical ultrasonic member in which the particles are agglomerated in the presence of an injected allgomeration initiator, and retaining the agglomerated particles in a filter.

Abstract: A separating system for separating material transported by air utilizing apparatus having a tangential inlet for a stream of air and entrained material, a bottom material exit, a boundary wall air exit and a central interior air exit. Each air exit includes a perforated wall or screen through which air is removed or separated from the entrained material. Enhanced separating action is achieved through coupling two such separators in a loop arrangement such that the material discharge from a first separator is conveyed via a relay stream of air to serve as the input to a second separator, while the entire air exhaust from the second separator is returned as one of a plurality of inlet streams to the first separator. A further advantage is realized by partitioning the air exhaust of the first separator into a plurality of parallel passageways which can be individually closed.

Abstract: Pressure control apparatus for a cyclone separator includes a variable air flow control valve in at least one line exiting from the separator. The air flow through that valve is adjusted in response to pressure changes in the separator. A flow control valve with adjustable bladders is preferred.

Abstract: Apparatus and process for extracting powder from a stream of powder laden air drawn from a manual powder spray booth in a first embodiment, with a cyclone recovery system, typically containing two cyclone separators for separating the powder from the air. The cyclone separators have a breakaway design to facilitate cleaning. The resulting cyclone cleaned air is drawn through a prefilter section by a fan section having serially stacked fans. The prefilter section further separates powder from the cyclone cleaned air. The resulting prefilter cleaned air is next filtered in a final filter section and exhausted to the air surrounding the cyclone recovery system. The invention also relates to an improved cyclone separator which incorporates a perforated thimble between the downwardly and upwardly moving vortexes in the cyclone separator to reduce the pressure drop across the cyclone separator.