US3907213A - Impact scrubber - Google Patents

Impact scrubber Download PDF

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Publication number
US3907213A
US3907213A US466302A US46630274A US3907213A US 3907213 A US3907213 A US 3907213A US 466302 A US466302 A US 466302A US 46630274 A US46630274 A US 46630274A US 3907213 A US3907213 A US 3907213A
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United States
Prior art keywords
lift tube
matter
enclosure
discharge
particulate matter
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US466302A
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English (en)
Inventor
John H Kauffman
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Simpson Technologies Corp
Original Assignee
National Engineering Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to SE7505070A priority Critical patent/SE7505070L/sv
Application filed by National Engineering Co filed Critical National Engineering Co
Priority to US466302A priority patent/US3907213A/en
Priority to CA218,565A priority patent/CA1064671A/en
Priority to AU80635/75A priority patent/AU485180B2/en
Priority to DE2519135A priority patent/DE2519135C3/de
Priority to CH547575A priority patent/CH590700A5/xx
Priority to FR7513715A priority patent/FR2269389B1/fr
Priority to IT22909/75A priority patent/IT1037775B/it
Priority to JP50052636A priority patent/JPS5248094B2/ja
Application granted granted Critical
Publication of US3907213A publication Critical patent/US3907213A/en
Anticipated expiration legal-status Critical
Assigned to SIMPSON TECHNOLOGIES CORPORATION reassignment SIMPSON TECHNOLOGIES CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: NATIONAL ENGINEERING COMPANY
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/10—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by dust separating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/10—Foundry sand treatment

Definitions

  • An 1mpact scrubber for removing coatmg materials PP 466,302 from the surfaces of particulate matter such as foundry sand and the like comprises a lift tube having [52 U.S. c1 241/40; 51/8 R; 241/1310. 10 an opposite FP f i "f high 51 1111.01. 13020 19/06; B24C 3/00 veloclty flu1d1zed Stream 9 i a ter, fluid 11 661 1 [58] Field 01 Search 51/8 R; 241/010. 10, 275, meaPs Spaced i end for Carrymg, particulate matter into sa1d inlet end and forming a 241/102,5,39, 40, 42
  • the present invention relates to a new and improved impact scrubber for removing coating materials from particulate matter and more particularly to new and improved apparatus for reclaiming for reuse the granular materials commonly used in foundry operations such as foundry sand and the like.
  • the present invention is an improvement over the apparatus shown and described in copending patent application, Ser. No. 332,415 filed Feb. 14, 1973, now US. Pat. No. 3,825,190, invented July 23, 1974, and assigned to the same assignee as the present invention.
  • foundry operations granular base materials such as silica sand, zirconia sand and the like are coated with binding products, for example, clays, cereals, resins, and oils and the resulting mixture comprises foundry sand which is shaped and molded into definite shapes around patterns to form mold cavities. Molten metal is poured into the cavities as castings are made. The molding sand is subjected to direct contact with hot molten metal and the binding products which coat the granular sand base materials are oxidized and/or calcined in the molding process by the intense heat involved.
  • binding products for example, clays, cereals, resins, and oils
  • oxidized or calcined coating materials on the used molding sand granules are generally carbonaceous in nature and also are of a generally lower density than the basic sand material itself.
  • the impact scrubber of the present invention is a self-contained, highly efficient unit, requiring a relatively small floor space, and is automatically controlled to provide the desired scrubbing/cleaning action as may be required for the particulate matter being treated.
  • Another object of the present invention is to provide a new and improved impact scrubber for cleaning particulate matter having a plurality of separate impact type sand scrubbing units and means for controlling the direction of discharge from all of said units simultaneously.
  • Another object is to provide a sand scrubber of the character described including novel means for adjusting the application of the individual scrubbing units for the most efficient operation.
  • Another object of the present invention is to provide a new and improved impact scrubber for cleaning particulate matter having a novel target system for receiving the impact of the fluidized flow of matter in order to mechanically remove the calcined or oxidized coatings from the individual particles of matter.
  • Another object of the invention is to provide a new and improved, dry process, mechanical impact type scrubber which includes a novel system for separating the coating materials from the grains of particulate matter.
  • Another object of the present invention is to provide a new and improved impact scrubber having a plurality of individual lift tube scrubber units and means for automatically controlling thedirection of the discharge of particulate matter for impact scrubbing or for discharge from the scrubber itself.
  • the scrubber comprises one or more lift tubes, each having an inlet end and an opposite end for containing a high velocity fluidized stream of said matter and fluid injector means spaced adjacent said inlet end for carrying said particulate matter into said inlet end and forming a fluidized stream in said lift tube.
  • Deflector means is provided adjacent and in communication with the opposite ends of the lift tubes for directing said fluidized stream angularly outward with respect to the longitudinal axes of said lift tubes for discharge therefrom.
  • Support means is provided for rotatively supporting said deflector means for directing said discharge therefrom in a selected one of a plurality of relative rotative positions.
  • Means is provided for separating the coating materials broken away from the grains of particulate matter and the cleaned grains of particulate matter so that the particulate matter may be used again.
  • FIG. I is an elevational view with portions shown in section of a new and improved impact scrubber for treating particulate matter constructed in accordance with the features of the present invention.
  • FIG. 2 is a transverse, horizontal cross sectional vie taken substantially along lines 22 of FIG. 1;
  • FIG. 3 is another transverse horizontal cross sectional view taken substantially along lines 22 of FIG. 1 but showing the scrubber units in a discharging position.
  • FIG. 4 is another transverse cross sectional view taken substantially along lines 44 of FIG. 1;
  • FIG. 5 is an enlarged fragmentary vertical sectional view taken substantially along lines 55 of FIG. 4. 7
  • the apparatus as a-whole is referred to by the reference numeral 10 and includes an upstanding cylindrical housing 12 having a circular base 14. At the upper end of the housing 12 there is provided a hopper 16 for holding and receiving the sand or other particulate matter to be processed by the scrubber.
  • the hopper 16 includes a frustro-conical bottom wall 18 having a circular shaped opening 20 at the lower end for feeding the particulate matter downwardly into a cylindrical, intermediate section of the housing referred to by the numeral 22 and separated from an upper or hopper section of the housing by an annular wall 24.
  • the intermediate or discharge section 22 of the housing is similarly separate from a lower housing section 26 by an annular wall 28.
  • the scrubber 10 includes a plurality of vertically extending, impact type, lift tube scrubbing assemblies or units generally indicated by reference numeral 30. As shown in FIG. 1, each scrubber unit extends upwardly from the lower housing section 26 through an opening in the annular wall 28 and projects upwardly to the intermediate section 22 of the housing. In the lower housing section 26, the scrubber units 30 are disposed on diametrically opposite sides of an upstanding, cylindrical, air plenum chamber 32 which is centrally positioned in the housing 12 and extends between the circular bottom plate 14 and the circular wall 28.
  • the plenum chamber 32 is supplied with a high volume flow of pressurized air from a suitable source such as a Rootes" type blower or equivalent via an inlet duct 34 which extends radially outwardly of the plenum chamber and passes through an appropriately shaped opening formed in the wall of the cylindrical housing 12.
  • a suitable source such as a Rootes" type blower or equivalent
  • Each of the lift tube scrubber units 30 includes a cylindrical outer shell 36 having an annular mounting flange 38 adjacent the upper end secured to the wall 28 in concentric relation with a circular opening therein by suitable fasteners such as removable bolts 39.
  • each shell 36 is provided with an annular lower end flange 40, which flanges provide support for convergent type, high velocity, injection nozzles 42 as shown in FIG. 1.
  • Each nozzle 42 is removably attached to its supporting flange and is connected at its lower end via a coupling 44 with a conduit structure in communication with the central plenum chamber 32 for receiving pressurized air.
  • the conduit structure includes an intermediate section 46 coupled at its lower end with a control valve 48 which in turn is interconnected with the central plenum chamber 32 by a supply elbow 50.
  • the supply elbows radiate outwardly from the plenum chamber and each elbow has a lower, horizontal leg 50a and a vertical leg 50b having its upper end connected to the lower end of a control valve 48.
  • the individual valves are adjusted and pressure gauges 52 connected to short pipe nipple sections 46 are provided for guiding the operator in adjustment of the valves to secure the desired rate of flow of fluid through the nozzle.
  • the central air plenum chamber 32 provides a high volume source of pressurized air at relatively low pressure (inches of water) for supplying the nozzles 42 of the lift tube scrubber units 30 and the valves 48 are utilized for individually controlling the respective units in accordance with the pressure gauge readings from the gauges 52.
  • a high pressure compressed air starting system is provided and this system includes an upstanding compressed air injector 54 mounted in each elbow 50 and designed to inject high pressure (up to lOO psi) starting air into the material collected in elbows to clear the passage through the nozzles 42 and the lower end of the shells 36.
  • the air injectors are connected to a common compressed air supply manifold 56 and a control valve 58 is provided.
  • the manifold is connected to a suitable source of high pressure air.
  • Each cylindrical shell 36 is formed with an elongated, axially extending access opening in the outer side wall thereof and these access openings are sealed during operation by means of removable or hingedly attached access doors 60.
  • the doors permit servicing of the interior of the shells 36 and clean out of the units if required.
  • each lift tube unit 30 includes an elongated, vertical lift tube 62 aligned in coaxial arrangement with an adjacent air supply nozzle 42 and spaced vertically above the outlet of the nozzle by an adjustable distance D.
  • the lower or inlet end of each lift tube 62 is provided with a replaceable annular inlet ring 64 having a slightly tapered internal bore and the ring is adapted to receive and guide a fluidized flow of particulate matter into the tube as it is entrained upwardly by the air jet issuing from the nozzle outlet.
  • the high velocity air flow moving upwardly in the lift tubes forms a high velocity turbulent fluidized flow of particulate matter and air.
  • the lift tubes 62 are adjusted in precise coaxial alignment with the nozzles 42 by means of radial spacers 66 mounted on the shells 36 and adjustable exteriorly thereof.
  • the spacers are provided at upper and lower levels on the shells as shown and at each level a plurality of spacers are provided (three or four) in order to permit precise axial alignment of the nozzle and lift tube.
  • the circular wall 28 is formed with circular openings 28a spaced radially outward of the center and in coaxial alignment with the respective shells 36 of the lift tube assemblies 30. These openings are substantially the same diameter as the internal diameter of the shells 36 and the particulate matter from the chamber section 22 flows downwardly into the shells around the lift tubes 62 for pick up by the air jets issuing upwardly from the outlet of the nozzles 42.
  • the elongated side access openings in the shells 36 permit the lift tubes 62, nozzles 42 and inlet ring 64 to be serviced on replaced without complete dismantling of the scrubber units 30.
  • the lower section 26 of the housing 12 is provided with relatively large, vertical, elongated access openings or slots 68 which slots are large enough to permit easy insertion and withdrawal of the complete lift tube unit 30 in both an assembled or disassembled condition.
  • each lift tube 62 is interconnected with a flow deflector and impact assembly generally indicated by the reference numeral 70.
  • the deflector assembly includes a cylindrical outer shell 72 and a centrally positioned coaxial lift tube extension 74 connected to the upper end of the lift tube 62 by a coupling 76.
  • Each lift tube extension 74 is supported within its shell 72 by means of a plurality of vertical rib members 78 extending radially outward from the lift tube extension at right angles to one another as best shown in FIGS. 2 and 3.
  • each lift tube extension 74 Adjacent the upper' end, each lift tube extension 74 is formed with an annular end wall 80, which wall forms an outer portion of an impact target for the upwardly moving, fluidized particulate matter carried in the lift tube 62. As best shown in FIG. 5 the end wall 80 is formed with a central aperture therein in order to accommodate the lower end of an elongated support rod 82 extending upwardly therethrough. As best shown in FIG. I, the support rods 82 project upwardly through openings provided in the circular wall 24 between the intermediate housing section 22 and an upper housing section adjacent the level of the hopper 16. At the lower end, each support rod is provided with a large cylindrical head 84, which head forms the central portion of an impact target for the upwardly moving fluidized particulate matter if the lift tube extension 74.
  • the upwardly flowing particulate matter forms a pad of particulate matter in the upper end of the lift tube extension and the pad of matter itself protects the structural members 80 and 84 from excessive wear.
  • the upwardly flowing matter impacts or strikes the pad of matter formed at the upper end of the lift tube and this causes further the oxidized coatings material to be knocked off of the individual grains of the particulate matter.
  • the arrows in FIG. are shown by the arrows in FIG.
  • the material rebounds downwardly and is deflected outwardly by the upwardly moving oncoming fluidized stream into a radially extending horizontal discharge tube 85 forming an elbow with the lift tube extension and having an open outer end adapted to discharge the impacted material which now includes relatively clean grains of particulate matter and the lighter in weight coating material which is knocked off or separated from base matter.
  • the outer, open ends of the discharge tubes 85 are adjacent the outer surface of the cylindrical deflector shells 72. From the foregoing it will be seen that the individual granules of particulate matter flowing upwardly in the lift tube units are impacted against one another again and again. Moreover, repeated impacts occur as the matter enters the lower inlet rings 64 on the lift tubes 62 as well as during the upward flow in the tubes. Further impacts occur as the matter strikes the pad of material formed at the closed upper end of the lift tube extension 74. Moreover, a further impact zone is developed adjacent to the mouth of the discharge tube 85 where the downwardly rebounding material collides with the upwardly moving matter before it moves outwardly toward the outer end of the discharge tubes.
  • the impact scrubbing zone centered above the cone 86 may be formed by the impingement of moving material streams impacting one another from opposite directions as described and set forth in the foregoing copending United States patent application, or in the alternative, a removable target structure 88 may be provided.
  • the target structure includes pairs vertically extending impact vanes 90 which are secured along their inner vertical edges to a central hollow tube 92.
  • the tube 92 is adapted to be restrained by upstanding support stud 94 which is secured to the apex of the cone 86.
  • a handle 96 is provided at the upper end of the tube 92.
  • Each individual deflector 70 is supported by a rod 82 and each rod is provided with an enlarged head 84 at the lower end.
  • the deflectors are rotatable from the normal operational position of FIG. 2 to the discharge position of FIG. 3 wherein the discharge tubes 85 are directed radially outwardly away from the center of the housing 12.
  • Each support rod is keyed to its deflector for rotation therewith by a cross pin 98 (FIG. 5) which extends through slots 74a provided on diametrically opposite sides of the lift tube extension 74 at the upper end as shown in FIG. 5.
  • each discharge box is positioned adjacent an elongated vertical slot 102 formed in the wall of the scrubber housing 12 and aligned with the outlet end of the discharge tubes 85 when the deflector assemblies 70 are in the discharge position as shown in FIG. 3. As best shown in FIG.
  • the slots 102 are longer in vertical dimension than the diameter of the discharge tubes 85 and the vertical adjustment of the lift tubes provided to vary the distance D changes the level of the discharging streams issuing from the outlet ends of the discharge tubes 85 into the respective discharge boxes 100.
  • the slots 102 are slightly larger in width or horizontal dimension than the outside diameter of the discharge tubes 85 so the precision alignment is not required when rotating the deflector assemblies 70 into the discharge position as shown in FIG. 3.
  • Each of the discharge boxes 100 includes a pair of opposite side walls 104, an outside wall 106, a top wall 108 and a bottom wall 1 l and the outer wall of the intermediate section 22 of the scrubber housing 12 provides an inside wall for the discharge boxes.
  • each discharge box is provided with a relatively thick, heavy, hanging baffle 112 formed of resilient material such as rubber and the like and extending downwardly through a slot formed in the top wall 108. The baffles hang freely and are positioned directly in front of the discharging streams from the discharge tubes 85.
  • Each hanging baffle includes an enlarge bulbous upper end portion for supporting the baffle from the top wall of the discharge box and the lower end portion of the baffle is free to swing and may be deflected by the high velocity stream of material impinging thereon.
  • each discharge box 102 there is provided a pair of adjustable baffles 1 14 and l 16 supported on shafts rotatably controllable from the outside of the boxes to achieve desired slopes for directing the heavier, cleaned sand grains or other particulate matter downwardly towards the lower end wall 110.
  • a fixed baffle 118 is also provided to guide the downwardly flowing material as it drops from the hanging resilient baffle 112 onto the adjustable baffle 114.
  • the material sifts downwardly in a falling stream or curtain from the lower edges of the baffles as it moves toward the lower end of the boxes.
  • the thickness of the streams of material is controlled by the adjustable baffles.
  • Material reaching the bottom wall 110 flows through a bottom discharge outlet 110a via a short pipe section 122 into the upper end of a pinch valve 120.
  • the lower end of the pinch valves 120 maybe interconnected to a common discharge manifold 124 so that the cleaned particulate matter from the scrubber may be discharged or transported via a pneumatic transport system or the like such as that shown in U.S. Pat. No. 3,297,366.
  • the pinch valves 120 may be of the type shown in this patent and are normally closed until a sufficient amount or head of material has been collected in the upper portion of the valve housing.
  • the flexible sleeves then open to discharge the material into the pneumatic transport system.
  • the valves may also be positively controlled to open and close.
  • each discharge box 100 is provided with an atmospheric damper assembly 122 which permits air to enter the lower end of the discharge box through an opening 104a in one of the side walls spaced below the fixed baffle 118 as best shown in FIG. 1.
  • Air entering through the dampers 122 passes upwardly in a tortuous path moving upwardly through the downwardly flowing curtain of material discharged from the lower edges of the respective baffles 1 14, 1 16 and 118. This upwardly moving draft of air current carries the lighter weight materials upwardly to discharge outlets 128 formed on the upper walls 108.
  • the discharge outlets 128 on the top walls 108 of the discharge boxes are connected to a suction manifold and a discharge fan 132 is provided to provide the necessary draft for removal of the fine materials as shown in FIGS. 1, 2 and 3.
  • the amount of fines removed can be controlled by adjusting the negative pressure in the discharge boxes.
  • the baffles 112 in discharge boxes 100 provide yet another impact Zone and the air draft therein provides means for separating the cleaned sand grains from the lighter weight coating materials that is knocked off of base particulate matter.
  • the cleaned sand is collected in the lower end of the discharge boxes 100 for delivery by a suitable transport system or the like to another location for further use.
  • each individual scrubber unit 30 is supported by an individual elongated support rod 82 having an enlarged head 84 at the lower end.
  • the rods project upwardly through openings 24:: in the circular wall 24 (FIG. 5) into the upper portion of the housing adjacent the level of the hopper 16.
  • Each support rod 82 is keyed to a lift tube extension 74 by means of a cross pin 98 so that rotation of a support rod will cause the deflector assembly 70 to rotate therewith.. Rotation of all of the support rods 82 by 180 from the position of FIG.
  • a conical valve member 138 adapted to open and close the discharge opening to regulate the flow.
  • the conical valve member 138 is mounted on the outer end of a cylinder rod 140a of a vertically positioned, fluid operated valve cylinder 140.
  • the lower end of the cylinder 140 is supported on a channel-like base 142 positioned in the intermediate housing section 22 and supported from the upper circular wall 24 at opposite ends by depending brackets 144 as best shown in FIG. 1.
  • a channel-like base 142 positioned in the intermediate housing section 22 and supported from the upper circular wall 24 at opposite ends by depending brackets 144 as best shown in FIG. 1.
  • opposite side edges of the support channel structure 142 cooperate with the upstanding limit stops 134 and 136 on the right hand (FIG. 1) deflector assembly 70 to provide for alignment of the discharge tubes 85 of the respective deflector assembly in the normal operating position (FIG. 2) or the discharge position (FIG. 3).
  • each upper rod is slidably disposed in a pair of flanged bearings 146 spaced on opposite sides of a chain sprocket 148, which is secured by set screws 150 to a sleeve 151 attached to the support rods 87 by a removable pin 153.
  • the lower flanged bearing 146 is attached to the upper surface of the circular wall 24 and the upper flanged bearing is attached to the upper surface of acircular support plate 152 supported in parallel, spaced apart relation above the circular wall 24 by a plurality of support post assemblies 154.
  • An endless roller chain 156 is entrained around all of the several sprockets 148 in order to drivingly rotate all of the support shafts 82 in unison and thereby rotate all of the deflector assemblies 70 when it is desired to move the deflectors from a discharge to an operating position or vice versa.
  • the roller chain 156 is passed around all of the sprockets 148 of the respective support rods 82 and in addition, the chain is passed around a pair of idler sprockets 156 into driving engagement with a single drive sprocket on the output shaft of a fluid motor 160.
  • the fluid motor 160 is reversible and is supplied from a source of compressed fluid.
  • a valve system is used to operate the motor in reverse directions in order to rotate the deflector assemblies 70 back and forth between the normal operating position and the discharge position of FIGS. 2 and 3.
  • the fluid motor is actuated to rotate the sprocket 158 in a given direction for a selected time interval, which interval is slightly longer than the time required to rotate the deflector assemblies through 180 from one position to the other. Rotation of the deflectors is stopped by engagement of one or the other stop members 134 or 136 with the side of the support channel 142 as previously described.
  • the set screw 150 on the sprocket 148 is loosened and the support rod is moved up or down as desired to provide the proper spacing D. After the spacing is set the set'screw 150 is retightened to again key the sprocket to the support rod.
  • the scrubber provides means for adjusting the individual clearance distance D between the lift tube entrance ring and the nozzle in each of the scrubber units 30 and in addition the system provides for simultaneously rotating all of the deflector assemblies 70 of the respective scrubber units to the normal operating or the discharge position as desired.
  • relatively large access slots 162 are provided in the housing wall 12 so that the chain, sprockets, bearings and set screws may be serviced and adjusted as described.
  • the intermediate section 22 of the housing 12 is formed with relatively large access openings 164 in the side wall in order to permit servicing or replacement of the individual deflector assemblies 70. These may be removed completely from the housing 12 by detachment from the respective lift tubes 62 when the couplings 76 and the set screws 150 are loosened.
  • the access openings 162 are large enough in width and height to permit easy service or complete withdrawal of a deflector assembly 70.
  • arcuate cover plates 164 are provided to cover the access openings 162 and confine the particulate material and dust within the intermediate section 22 of the housing 12.
  • the scrubber of claim 1 including means for supporting said lift tube in a selected one of a plurality of different axial positions relative to said injector means wherein said spacing between -said inlet end and said injector'means may be selectively adjusted.
  • the scrubber of claim 1 including a plurality of said lift tube units, a common housing for said'units having a central axis spaced between said units, said means for rotating said deflector 'rneans operable-to position a discharge tube for each lift tube in a selected direction facing toward said central axis oraway from said axis, and separator means including enclosures spaced on opposite sides of said housing for receiving fluidized streams of material discharged from said deflector means when positioned to discharge away from said central axis, said separator means further including means for separating said particulate matter and said coating materials removed from the surfaces of said particulate matter.
  • said supporting means includes means for supporting each of said lift tubes in selectively adjustable axial positions relative to their respective injector means wherein said spacing between said inlet end and said injector means of each unit may be varied.
  • each unit includes a lift tube extension having a closed upper end and a discharge tube angularly extended outwardly from said lift tube extension and in communication therewith at a level below said closed end.
  • each unit includes removable coupling means for interconnecting a lower end of said lift tube extension and said opposite end of said lift tube.
  • an enclosure flexible target means in said enclosure, inlet means adjacent an upper level of said enclosure for directing a flow of said matter and material against said target means, said target means including a piece of flexible material supported from an upper end portion to hang generally vertically in said enclosure with a freely deflectable lower end portion spaced in front of said inlet meaans, baffle means in said enclosure below said inlet means for forming a curtain of downwardly flowing matter and material and draft means for moving a flow of air through said curtain for carrying at least a portion of said coating materials upwardly away from said particulate matter.
  • said draft means includes an air inlet opening in said enclosure spaced below said baffle means and suction means in communication with said enclosure above said baffle means for inducing air pass into said air inlet opening and through said curtain of material flowing downwardly of said baffle means.
  • said baffle means includes at least one sloped baffle and means for adjustably selecting the angle of slope thereof.
  • An impact scrubber for removing coating materials from the surfaces of particulate matter such as foundry sand and the like comprises at least one lift tube unit having a lift tube with an inlet end and an opposite end for containing a high velocity fluidized stream of said matter, fluid injector means spaced adja cent said inlet end for carrying said particulate matter into said inlet end and forming a fluidized stream of said matter in said left tube, deflector means adjacent and in communication with said opposite end for directing said fluidized stream angularly outward with respect to a longitudinal axis of said lift tube for discharge therefrom, support means for rotatively supporting said deflector means for directing said discharge therefrom in a selected one of a plurality of relative rotative positions, and means for separating said coating materials and particulate matter including an enclosure for receiving said fluidized stream from said deflector means, flexible target means in said enclosure, inlet means adjacent an upper level of said enclosure for directing a flow of said matter and material against said target means, baffle means in said enclosure below said in
  • said enclosure includes a side wall, said inlet means adapted to direct a horizontal flow of material through said side wall, and said target means comprises a piece of flexible material supported from an upper end portion to hang generally vertically in said enclosure with a freely deflectable lower end portion spaced in front of said inlet means.
  • said draft means includes an air inlet opening in said enclosure spaced below said baffle means and suction means in communication with said enclosure above said baffle means for inducing air pass into said air inlet opening and through said curtain of material flowing downwardly of said baffle means.
  • baffle means includes at least one sloped baffle and means for adjustably selecting the angle of slope thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
US466302A 1974-05-02 1974-05-02 Impact scrubber Expired - Lifetime US3907213A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
SE7505070A SE7505070L (sv) 1974-05-02 1974-04-30 Reningsanleggning.
US466302A US3907213A (en) 1974-05-02 1974-05-02 Impact scrubber
CA218,565A CA1064671A (en) 1974-05-02 1975-01-24 Impact scrubber
DE2519135A DE2519135C3 (de) 1974-05-02 1975-04-29 Reinigungsanlage zum Prallreinigen von verunreinigtem, körnigem Material
AU80635/75A AU485180B2 (en) 1974-05-02 1975-04-29 Impact scrubber
CH547575A CH590700A5 (sv) 1974-05-02 1975-04-29
FR7513715A FR2269389B1 (sv) 1974-05-02 1975-04-30
IT22909/75A IT1037775B (it) 1974-05-02 1975-04-30 Impianto di pulitura
JP50052636A JPS5248094B2 (sv) 1974-05-02 1975-05-02

Applications Claiming Priority (1)

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US466302A US3907213A (en) 1974-05-02 1974-05-02 Impact scrubber

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US3907213A true US3907213A (en) 1975-09-23

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US466302A Expired - Lifetime US3907213A (en) 1974-05-02 1974-05-02 Impact scrubber

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US (1) US3907213A (sv)
JP (1) JPS5248094B2 (sv)
CA (1) CA1064671A (sv)
CH (1) CH590700A5 (sv)
DE (1) DE2519135C3 (sv)
FR (1) FR2269389B1 (sv)
IT (1) IT1037775B (sv)
SE (1) SE7505070L (sv)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177952A (en) * 1978-04-24 1979-12-11 National Engineering Company Impact scrubber
US4487372A (en) * 1982-04-16 1984-12-11 Combustion Engineering, Inc. Thermal sand reclamation system
US4566637A (en) * 1982-04-16 1986-01-28 Combustion Engineering, Inc. Thermal sand reclamation system
US5217170A (en) * 1992-02-11 1993-06-08 Gmd Engineered Systems, Inc. Method for both cooling and pneumatically scrubbing a calcined, particulate material
CN109822463A (zh) * 2019-04-22 2019-05-31 王帅 一种金属制品表面除锈研磨装置
CN113546724A (zh) * 2021-07-27 2021-10-26 广东彩格科技有限公司 一种高性能涂料研磨装置及工艺

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354641A (en) * 1979-02-26 1982-10-19 Weatherly Foundry & Manufacturing Co. Apparatus for removing no-bake coatings from foundry sand and classifying the reclaimed sand
EP0149876A1 (en) * 1984-01-20 1985-07-31 Wheelabrator-Frye Inc. Method of and apparatus for reclaiming casting sand
JPS62131673U (sv) * 1986-02-14 1987-08-19
JP2567862B2 (ja) * 1987-07-20 1996-12-25 富士通株式会社 抵抗値の測定方法
JPH01195372A (ja) * 1988-01-29 1989-08-07 Chino Corp 電流電圧測定装置
DE3909721A1 (de) * 1989-03-23 1990-10-04 Hermann Jacob Fein- und feinstanteilabscheider zur verwendung bei der regenerierung von giessereialtsand
DE4109993A1 (de) * 1991-03-27 1992-10-01 Klein Alb Gmbh Co Kg Verfahren zum regenerieren von haufwerk aus beschichteten koernern, insbesondere von giessereialtsanden
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US4177952A (en) * 1978-04-24 1979-12-11 National Engineering Company Impact scrubber
US4487372A (en) * 1982-04-16 1984-12-11 Combustion Engineering, Inc. Thermal sand reclamation system
US4566637A (en) * 1982-04-16 1986-01-28 Combustion Engineering, Inc. Thermal sand reclamation system
US5217170A (en) * 1992-02-11 1993-06-08 Gmd Engineered Systems, Inc. Method for both cooling and pneumatically scrubbing a calcined, particulate material
CN109822463A (zh) * 2019-04-22 2019-05-31 王帅 一种金属制品表面除锈研磨装置
CN113546724A (zh) * 2021-07-27 2021-10-26 广东彩格科技有限公司 一种高性能涂料研磨装置及工艺
CN113546724B (zh) * 2021-07-27 2022-08-26 广东彩格科技有限公司 一种高性能涂料研磨装置及工艺

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Publication number Publication date
DE2519135B2 (de) 1979-11-08
DE2519135A1 (de) 1975-11-06
FR2269389B1 (sv) 1979-05-11
JPS5123431A (sv) 1976-02-25
SE7505070L (sv) 1975-11-03
IT1037775B (it) 1979-11-20
FR2269389A1 (sv) 1975-11-28
JPS5248094B2 (sv) 1977-12-07
CH590700A5 (sv) 1977-08-15
AU8063575A (en) 1976-11-04
CA1064671A (en) 1979-10-23
DE2519135C3 (de) 1980-07-24

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