US3483973A - Air classifier - Google Patents

Air classifier Download PDF

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Publication number
US3483973A
US3483973A US620050A US3483973DA US3483973A US 3483973 A US3483973 A US 3483973A US 620050 A US620050 A US 620050A US 3483973D A US3483973D A US 3483973DA US 3483973 A US3483973 A US 3483973A
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US
United States
Prior art keywords
air
chamber
sizing
sizing chamber
distributor plate
Prior art date
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
US620050A
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English (en)
Inventor
Heinz Jager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westfalia Dinnendahl Groeppel AG
Original Assignee
Westfalia Dinnendahl Groeppel AG
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
Application filed by Westfalia Dinnendahl Groeppel AG filed Critical Westfalia Dinnendahl Groeppel AG
Application granted granted Critical
Publication of US3483973A publication Critical patent/US3483973A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/086—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by the winding course of the gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/025—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force

Definitions

  • Air classifier has an air distributing chamber with one or more air outlet nozzles located in a sizing chamber.
  • the nozzles extend tangentially to the air distributing chamber in the direction of rotation of a rotary particulate material distributing plate centrally overlying the air distributing chamber in the sizing chamber.
  • a conduit centrally connected to the air distributing chamber delivers air thereto from a ventilator.
  • a conduit extending tangentially from the upper portion of the sizing chamber draws the fine-particle component of the material therefrom by suction into a cyclone.
  • My invention relates to an air classifier and more particularly to such device having an externally located ventilator or blower.
  • An air classifying device has a housing enclosing a sizing chamber, into the lower portion of which air is blown from a ventilator through an air distributing chamber and an adjustable jalousie-like crown. Particulate material to be classified is flung into the sizing chamber by means of a distributor plate located in the lower part of the sizing chamber. The coarse particles are discharged downwardly from the sizing chamber, while the fine particles are withdrawn by suction at the upper margin of the sizing chamber through suction tubes extending tangentially tom the sizing chamber to respective cyclones disposed around the sizing chamber housing, and are accordingly deposited in the cyclones.
  • Such a classifier operates with a relatively unfavorable separating action because the entering air is first directed more or less strongly inwardly and thereby acts opposite to the material flung outwardly from the distributor plate. Moreover, the air inlet openings lie in the path of the coarse particles sliding off the wall of the sizing chamber so that the discharge of the coarse particles is impeded.
  • air classifying device having an air distributing chamber with one or more air outlet nozzles located in a sizing chamber.
  • the nozzles extend tangentially to the air distributing chamber in. the direction of rotation of a rotary distributor plate for particulate material beneath which the air distributing chamber is located centerally in the sizing chamber.
  • a conduit centrally connected to the air distributing chamber delivers air thereto from a ventilator or blower located externally to the sizing chamber.
  • I provide additionally an adjustable air outlet opening in the center of the air distributing chamber whereby the sizing air may be permitted to enter the sizing chamber partly through the air outlet nozzles and partly through the adjustable air outlet opening, so that the particle sizes to be sized are able to be largely regulated.
  • FIG. 1 is a schematic elevational view, partly in section, of an air classifying device constructed in accordance with my invention.
  • FIG. 2 is a sectional view of FIG. 1 taken along the line II--II in the direction of the arrows.
  • an air classifying device made up of a sizing chamber 1, an externally located ventilator or blower 2 and separator cyclones 3 for the deposit of fine particles therein.
  • the ventilator 2 is connected by a pressure conduit 4 to an air distributing chamber 6 located centrally at the bottom of the sizing chamber 1 beneath a distributor plate 5.
  • the air distributing chamber 6 has a plurality of air outlet nozzles 6' (six nozzles in the illustrated embodiment) extending tangentially from the peripheral surface thereof. Particulate material to be classified is supplied through the supply tube 14 into a conical hopper from which it drops onto the distributor plate 5.
  • the distributor plate 5 is mounted on a vertically extending shaft 11 which is rotated by a motor 12 through a transmission 13.
  • Air blown from the ventilator or blower 2 passes through the conduit 4 into air distributing chamber 6 from which it issues through the nozzles 6 into the sizing chamber 1. Simultaneously particulate material supplied from above onto the rotary distributor plate 5 is hurled outwardly in the sizing chamber 1.
  • the coarse particles which strike the walls of the sizing chamber 1 and slide downwardly are discharged through an outlet tube provided with air lock discharge means such as a counterbalanced swinging flap 15, much like a butterfly-valve which opens as the weight of the gross particles accumulating above it exceeds that of the counterweight.
  • the fine particles are sucked out of the sizing chamber 1 through the conduits 9 which are connected tangentially thereto and are conducted to the cyclones 3 from which the purified air is returned through the conduits 10 to the ventilator 2 while the fine particulate material is deposited in the cyclones 3 and is discharged therefrom through the swinging flap valves 18 corresponding to the aforedescribed members 15.
  • Air classifying device for sizing particulate material comprising a sizing chamber having a coarse-particle component discharge outlet provided with air-lock discharge means, a rotary distributor plate located in the lower portion of said sizing chamber and defining an annular space therewith for flinging the material supplied thereto into said sizing chamber, a stationary air distributing chamber located below said rotary distributor plate in said sizing chamber and being substantially coaxial with said sizing chamber, said stationary air distributing chamber having at least one air outlet nozzle extending tangentially therefrom in the rotary direction of said distributor plate, a ventilator located externally to said sizing chamber, first duct means connected to said air distributing chamber substantially at the axis thereof and connecting said ventilator with said air distributing chamber for blowing air through said air distributing chamber into the lower portion of said sizing chamber, said air passing upwardly through said annular space to entrain fine-particle components, cyclone means located externally to said sizing chamber, and second duct means extending tangentially
  • Air classifying device according to claim 1, wherein said second duct means comprises a plurality of ducts respectively connected to a plurality of cyclones located externally to and spaced around said sizing chamber.
  • Air classifying device for sizing particulate material comprising a sizing chamber, a rotary distributor plate located in the lower portion of said sizing chamber for flinging the material supplied thereto into said sizing chamber, a stationary air distributing chamber located below said rotary distributor plate in said sizing chamber and having at least one air outlet nozzle extending tangentially therefrom in the rotary direction of said distributor plate, said air distributing chamber having an air outlet opening substantially in the center thereof, and including means for adjusting the size of said opening, a ventilator located externally to said sizing chamber, first duct means connecting said ventilator with said air distributing chamber for blowing air through said air distributing chamber into the lower portion of said sizing chamber, cyclone means located externally to said sizing chamber, and second duct means extending tangentially from the upper portion of said sizing chamber and connected to said cyclone for Withdrawing by suction a fineparticle component of the material from said sizing chamber.
  • Air classifying device comprises an adjustable slider having a closure member at one end thereof, the other end of said slider extending out of said sizing chamber.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Cyclones (AREA)
US620050A 1966-03-03 1967-03-02 Air classifier Expired - Lifetime US3483973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW41066A DE1240374B (de) 1966-03-03 1966-03-03 Umluftsichter

Publications (1)

Publication Number Publication Date
US3483973A true US3483973A (en) 1969-12-16

Family

ID=7602697

Family Applications (1)

Application Number Title Priority Date Filing Date
US620050A Expired - Lifetime US3483973A (en) 1966-03-03 1967-03-02 Air classifier

Country Status (7)

Country Link
US (1) US3483973A (de)
CH (1) CH441958A (de)
DE (1) DE1240374B (de)
FR (1) FR1513042A (de)
GB (1) GB1105339A (de)
NO (1) NO121124B (de)
SE (1) SE301079B (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620370A (en) * 1969-06-02 1971-11-16 Rue E Swayze Ore concentrator
US3656618A (en) * 1968-06-19 1972-04-18 Polysius Ag Air sifter
DE2101956A1 (de) * 1971-01-16 1972-07-20 Wedag Westfalia Dinnendahl Gröppel AG, 4630 Bochum Umluftsichter
US3682302A (en) * 1969-03-01 1972-08-08 Paul Bernutat Air separator
DE2328220A1 (de) * 1972-06-12 1974-01-03 Donaldson Co Inc Vorrichtung und verfahren zur erzeugung eines wirbels
US4059507A (en) * 1975-06-13 1977-11-22 Yoshimori Nobuo Classifying apparatus for particulate materials
US4599163A (en) * 1983-06-03 1986-07-08 The Proteins Technology S.P.A. Device for the separation of the components of edible meal
US4602924A (en) * 1983-10-28 1986-07-29 Metallgesellschaft Aktiengesellschaft Centrifugal separator
US5858237A (en) * 1997-04-29 1999-01-12 Natural Resources Canada Hydrocyclone for separating immiscible fluids and removing suspended solids
CN1100625C (zh) * 1996-10-11 2003-02-05 石川岛播磨重工业株式会社 分级机
US20090294333A1 (en) * 2006-09-20 2009-12-03 Babcock Borsig Service Gmbh Centrifugal Separator
US9211547B2 (en) 2013-01-24 2015-12-15 Lp Amina Llc Classifier
US10744436B2 (en) * 2017-02-10 2020-08-18 Air Control Techniques, P.C. Particulate separator for the removal of large particulate matter from ventilation system air streams

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109647591B (zh) * 2019-01-31 2022-02-18 鑫明星环保科技有限公司 一种新型选粉机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823801A (en) * 1956-07-06 1958-02-18 Menzies Engineering Company Recovery of coal
US2966265A (en) * 1957-07-18 1960-12-27 Westfalia Dinnendahl Air-circulation classifier
US3095369A (en) * 1961-06-14 1963-06-25 Westfalia Dinnendahl Air-circulation classifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823801A (en) * 1956-07-06 1958-02-18 Menzies Engineering Company Recovery of coal
US2966265A (en) * 1957-07-18 1960-12-27 Westfalia Dinnendahl Air-circulation classifier
US3095369A (en) * 1961-06-14 1963-06-25 Westfalia Dinnendahl Air-circulation classifier

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656618A (en) * 1968-06-19 1972-04-18 Polysius Ag Air sifter
US3682302A (en) * 1969-03-01 1972-08-08 Paul Bernutat Air separator
US3620370A (en) * 1969-06-02 1971-11-16 Rue E Swayze Ore concentrator
DE2101956A1 (de) * 1971-01-16 1972-07-20 Wedag Westfalia Dinnendahl Gröppel AG, 4630 Bochum Umluftsichter
DE2328220A1 (de) * 1972-06-12 1974-01-03 Donaldson Co Inc Vorrichtung und verfahren zur erzeugung eines wirbels
US3885931A (en) * 1972-06-12 1975-05-27 Donaldson Co Inc Vortex forming apparatus and method
US4059507A (en) * 1975-06-13 1977-11-22 Yoshimori Nobuo Classifying apparatus for particulate materials
US4599163A (en) * 1983-06-03 1986-07-08 The Proteins Technology S.P.A. Device for the separation of the components of edible meal
US4602924A (en) * 1983-10-28 1986-07-29 Metallgesellschaft Aktiengesellschaft Centrifugal separator
CN1100625C (zh) * 1996-10-11 2003-02-05 石川岛播磨重工业株式会社 分级机
US5858237A (en) * 1997-04-29 1999-01-12 Natural Resources Canada Hydrocyclone for separating immiscible fluids and removing suspended solids
US20090294333A1 (en) * 2006-09-20 2009-12-03 Babcock Borsig Service Gmbh Centrifugal Separator
US8033399B2 (en) * 2006-09-20 2011-10-11 Babcock Borsig Service Gmbh Centrifugal separator
US9211547B2 (en) 2013-01-24 2015-12-15 Lp Amina Llc Classifier
US10744436B2 (en) * 2017-02-10 2020-08-18 Air Control Techniques, P.C. Particulate separator for the removal of large particulate matter from ventilation system air streams

Also Published As

Publication number Publication date
FR1513042A (fr) 1968-02-09
GB1105339A (en) 1968-03-06
CH441958A (de) 1967-08-15
SE301079B (de) 1968-05-20
NO121124B (de) 1971-01-18
DE1240374B (de) 1967-05-11

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