EP0484758B1 - Dispositif pour la dispersion de matières - Google Patents

Dispositif pour la dispersion de matières Download PDF

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Publication number
EP0484758B1
EP0484758B1 EP91118189A EP91118189A EP0484758B1 EP 0484758 B1 EP0484758 B1 EP 0484758B1 EP 91118189 A EP91118189 A EP 91118189A EP 91118189 A EP91118189 A EP 91118189A EP 0484758 B1 EP0484758 B1 EP 0484758B1
Authority
EP
European Patent Office
Prior art keywords
gas
air channel
sieve
air
classifier
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
EP91118189A
Other languages
German (de)
English (en)
Other versions
EP0484758A3 (en
EP0484758A2 (fr
Inventor
Herbert Dr. Weit
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.)
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Original Assignee
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
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 Christian Pfeiffer Maschinenfabrik GmbH and Co KG filed Critical Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Publication of EP0484758A2 publication Critical patent/EP0484758A2/fr
Publication of EP0484758A3 publication Critical patent/EP0484758A3/de
Application granted granted Critical
Publication of EP0484758B1 publication Critical patent/EP0484758B1/fr
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
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06—Feeding or discharging arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/30—Mixing gases with solids
    • 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
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes

Definitions

  • the invention relates to a device for material dispersion, in particular for scatter classifiers, according to the preamble of claim 1.
  • a device for material dispersion is known for example from DE 36 21 221 C2.
  • this known device which is used in a multi-stage scattering sifter, cone-shaped scattering discs are used in a conventional manner.
  • multi-stage processes With multi-stage processes, a relatively good, even distribution of the material to be classified is achieved in front of the viewing area.
  • a single-stage spreader plate In the case of a single-stage spreader plate, however, there is always the risk of a streak-like distribution of the material which is thrown away by centrifugal forces from the upper edge of the spreader plate, so that subsequently no optimal screening is carried out.
  • a current classifier with a material introduction device which consists of a bottom-ventilated feed ring container at the upper edge of the classifier and a material overflow inwards to a guide vane blade system of the current classifier.
  • a ventilation pipe With the help of a ventilation pipe, the feed material is loosened and passes over a conical sliding surface to the guide vanes, where it is carried by a supplied carrier gas into a viewing area.
  • This device with a bottom-ventilated feed ring container is used to supply material to be ground mechanically discharged from a mill to a guide vane ring of a flow classifier. Homogeneous and efficient material dispersion is not guaranteed, in particular because of the obliquely arranged ventilation pipe in the feed ring container.
  • the feed container of DE 33 10 709 A1 is also used to feed a static classifier.
  • the container bottom is porous and has at least one segment-like fluid space.
  • the container wall is provided with outlet slots or a horizontal outlet ring, from which the fluidized feed material emerges primarily and in the form of strands or jets.
  • a fluidized bed is formed in the feed container and overflows at the appropriate height over the upper edge in the direction of the visible space.
  • a material distribution cone which is provided with additional wear protection elements, is arranged in order to homogenize the material emerging in a strand shape from the feed container.
  • the invention has for its object to provide a device for material dispersion which is structurally particularly simple and which allows good homogenization to achieve in the dispersion of the material, relatively simple control options should also be possible regardless of the rotation of the sifter basket.
  • the main idea for material dispersion can be seen in the integrated arrangement of a sieve or hole-like surface as material feed surface and a fluid space in a gas or air channel, so that an extremely uniform gas or air flow is generated essentially in the ascending direction.
  • the material fed into the air channel from above, which is preferably applied via a plurality of evenly spaced material feed lines, is held in this stationary gas or air channel by the inflowing fluid, in particular air fluidized, held above the sieve-like surface and, if necessary, set into a rotational movement, so that the feed material flows almost like a water channel.
  • the material to be classified can be introduced evenly dispersed into the annular visual space underneath via the radially outer edge.
  • rotating dispersing vanes are provided below the gas and air channels, so that a further rotary influencing of the predispersed material can thereby be carried out.
  • the outer diameter of these dispersing or accelerating vanes corresponds approximately to the outer diameter of the air channel and can be kept slightly larger.
  • the supply of compressed air or another gas can be provided on the bottom side of the air channel or on its side walls to improve the material outflow.
  • the height of the sieve-like surface above the bottom of the air channel can also be suitably adjusted.
  • regulation of the compressed air supplied is possible both in terms of pressure and volume.
  • the air channel can also have a semicircular contour in vertical section.
  • the air channel is usually also arranged horizontally, a slight inclination radially outward being desirable for better flow of the dispersed material.
  • the end surface thereof can be guided upwards against the sieve-like surface in the manner of an inclined plane, so that the levitating forces acting against the material particles from below are improved.
  • the sieve and hole formation can also determine an outflow direction of the compressed air.
  • a device for material dispersion designed in this way therefore also allows the feed material to be optimally influenced in terms of control technology with regard to a uniform, homogeneous distribution over the entire circumference, this being possible with a simple construction.
  • both the rotation and the levitation of the material can be influenced by the different compressed air conditions, whereby there is complete independence from the drive of the classifier basket.
  • the feed direction of the supplied material is suitably in the direction of flow of the volume of material fluidized in the air channel.
  • the figure shows a vertical section through a spreading sifter 1 with a sifter cage 4 driven via the central shaft 3.
  • the housing 2 of the spreading sifter 1 has an essentially circular cylindrical shape, which in the lower part merges into a funnel 28 for the coarse material outlet 27.
  • annular or spiral sifting air channels 6 are arranged. From these classifying air channels 6, the classifying air flows through a guide vane ring 7 essentially tangentially into the actual classifying area 24.
  • An approximately U-shaped gas or air channel 10 is provided above the sifter basket 4 and is fixed to the sifter housing in a stationary manner.
  • This air channel 10, which is open at the top, has a perforated plate as a sieve-like surface at about half the height in a horizontal arrangement 12 on.
  • a fluid chamber or an air chamber 18 is accordingly formed below this perforated plate 12. Compressed air with a rotationally increasing flow direction flows into this air chamber 18 on the bottom side via a feed line 16.
  • the material feed 11 above the air channel 10 is inclined in the direction of the desired rotational movement of the material guided in the air channel.
  • the material to be classified and introduced via the material feed 11 is held above the perforated plate 12 by the air blown in below in the manner of a fluidized medium and blown out evenly distributed over the radially outer edge 19 as the dispersion edge of the air channel 10 into the region of the visible space.
  • approximately square-shaped acceleration wings 22 Arranged on the upper side of the viewing basket 4, approximately square-shaped acceleration wings 22 impart further tangential acceleration to the material dispersed via the air channel, so that the material particles, well dispersed, reach the actual viewing space 24 in the area between the sight strips 5 and the guide vane ring 7.
  • the fine material passing through the sight strips 5 into the centrifugal basket 4 is drawn off downwards via the fine material outlet 26 in the example. A further withdrawal direction of the fine material could take place vertically upwards over the interior of the classifier basket 4.
  • the coarse material with heavier material particles is guided in the classifier 1 via the funnel 28 into the coarse material outlet 27.
  • the adjustment of the compressed air supplied via the supply lines 16 and 17 allows the material to be classified to be given a movement which is independent of the rotation of the sifter basket 4 can flow like in a water channel, so that a well-dispersed material is fed to the actual viewing zone.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Lubricants (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Cell Separators (AREA)

Claims (10)

  1. Dispositif pour la dispersion de matière, notamment pour un séparateur à dispersion (1) comportant au moins une entrée supérieure (11) de matière et une surface de réception de matière très largement coaxiale à l'axe du séparateur à dispersion (1) et qui est réalisée sous la forme d'une surface en tamis (12), et celle-ci est arrangé au-bessus d'une chambre à fluide (18), cette chambre (18) comportant des alimentations (17) pour du gaz ou de l'air comprimé créant un écoulement fluide au-dessus de la surface en tamis (12), caractérisé en ce que la surface en tamis (12) et la chambre à fluide (18) sont réalisées dans une goulotte à gaz ou à air (10) et cette goulotte (10) présente une surface supérieure (13), libre, et un bord de dispersion (19) radialement extérieur par lequel la matière à disperser est fournie à une chambre de triage (24) d'un panier de triage (4) en aval et entre la goulotte à gaz ou à air (10) et le panier de triage (4) des ailettes d'accélération (22) rotatives sont prévues.
  2. Dispositif selon la revendication 1, caractérisé en ce que le diamètre extérieur de l'ailette d'accélération (22) rotative correspond sensiblement au diamètre extérieur de la goulotte à gaz ou à air (10) et/ou du panier de triage (4) ou est légèrement supérieur.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la goulotte à gaz ou à air (10) a sensiblement une section en U et la surface en tamis (12) est réalisée comme surface en tamis ou surface perforée située sensiblement à mi-hauteur de la goulotte à gaz ou à air (10).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la goulotte à gaz ou à air (10) est horizontale ou est en forme de spirale suivant la direction axiale du séparateur à dispersion (1).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la chambre à fluide (18) est réalisée entre une surface de fond (14) de la goulotte à gaz ou à air (10) et la surface en tamis (12) et les alimentations (17) en gaz ou air comprimé sont prévues dans la surface de fond (14) avec une direction d'écoulement montant de manière tangentielle, en rotation.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce qu'en plus des alimentations (17) en gaz ou en air comprimé réalisées dans la surface de fond (14), les parois latérales de la goulotte à gaz ou à air (10) comportent des alimentations en gaz ou en air compri mé.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que les alimentations en gaz ou air comprimé et/ou plusieurs alimentations de matière sont réparties régulièrement à la périphérie de la goulotte à gaz ou air (10).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que la goulotte à gaz ou air (10) et/ou la surface en forme de tamis (12) sont inclinées dans la direction du bord de dispersion (19) qui se trouve radialement à l'extérieur.
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que la direction d'écoulement du gaz ou de l'air comprimé ascendants est définie également par la réalisation du tamis ou des trous de la surface en forme de tamis (12).
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que la surface en forme de tamis (12) est réglable en hauteur dans la goulotte à gaz ou à air (10) et cette goulotte (10) a une forme annulaire ou partiellement annulaire.
EP91118189A 1990-11-08 1991-10-24 Dispositif pour la dispersion de matières Expired - Lifetime EP0484758B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9015363U 1990-11-08
DE9015363U DE9015363U1 (de) 1990-11-08 1990-11-08 Vorrichtung zur Materialdispergierung

Publications (3)

Publication Number Publication Date
EP0484758A2 EP0484758A2 (fr) 1992-05-13
EP0484758A3 EP0484758A3 (en) 1992-09-23
EP0484758B1 true EP0484758B1 (fr) 1995-07-19

Family

ID=6859178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118189A Expired - Lifetime EP0484758B1 (fr) 1990-11-08 1991-10-24 Dispositif pour la dispersion de matières

Country Status (6)

Country Link
US (1) US5232096A (fr)
EP (1) EP0484758B1 (fr)
AT (1) ATE125176T1 (fr)
CA (1) CA2055124C (fr)
DE (2) DE9015363U1 (fr)
ES (1) ES2078411T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401741B (de) * 1993-08-19 1996-11-25 Thaler Horst Dipl Ing Windsichter
FR2720666B1 (fr) * 1994-06-01 1996-08-23 Laurent Durst Dispositif et procédé de séparation de particules formant un produit granuleux.
JPH08281213A (ja) * 1995-04-14 1996-10-29 Ishikawajima Harima Heavy Ind Co Ltd 分級機
DE19854855C2 (de) * 1998-11-27 2002-01-17 Hosokawa Alpine Ag & Co Windsichter
EP1561519A1 (fr) * 2004-02-04 2005-08-10 Magotteaux International S.A. Séparateur de matière granuleuse
FR2941389B1 (fr) * 2009-01-29 2011-10-14 Fives Fcb Dispositif de separation granulometrique selective de matieres pulverulentes solides, a action centrifuge, et procede d'utilisation d'un tel dispositif
CN103480576A (zh) * 2013-09-29 2014-01-01 河南嘉和节能科技有限公司 喂料口具有增风均化装置的选粉机
CN105396783B (zh) * 2015-12-01 2018-11-23 东阳市启创知识产权运营有限公司 一种分离装置
CN107803339A (zh) * 2017-10-14 2018-03-16 胡振锋 一种高效选粉机
DE102019123034B3 (de) * 2019-08-28 2020-12-03 Khd Humboldt Wedag Gmbh Zyklon mit rotierendem Stabkorb
CN112387417B (zh) * 2020-10-27 2023-03-28 佛山市南海华昊华丰淀粉有限公司 一种面粉加工过程中的除铁吸尘装置及除铁吸尘方法

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
US530445A (en) * 1894-12-04 Purifier and aerator
US1962455A (en) * 1931-01-30 1934-06-12 Henry S Montgomery Air separator
FR88297E (fr) * 1965-07-09 1967-01-06 Polysius Gmbh Séparateur à air avec dispositif d'épandage monté verticalement et alimentation du produit à séparer au centre par le haut
US3474903A (en) * 1968-10-22 1969-10-28 Harry S Ausherman Grain drying and debris separation device
US3620370A (en) * 1969-06-02 1971-11-16 Rue E Swayze Ore concentrator
DE2364568A1 (de) * 1973-12-24 1975-06-26 Kloeckner Humboldt Deutz Ag Kreiselsichter mit drehverteiler
DD111159A1 (fr) * 1974-05-03 1975-02-05
JPS51147059A (en) * 1975-06-13 1976-12-17 Nobuo Yoshimori Apparatus for classification
DD208561B1 (de) * 1982-06-22 1986-12-10 Dessau Zementanlagenbau Veb Dispergiervorrichtung fuer einen statischen sichter
US4551241A (en) * 1984-02-08 1985-11-05 Sturtevant, Inc. Particle classifier
DE3515026C1 (de) * 1985-04-25 1986-09-18 Fa. Christian Pfeiffer, 4720 Beckum Drehluft-Schleuderkorb-Sichter
DE3545691C1 (de) * 1985-12-21 1987-01-29 Orenstein & Koppel Ag Vorrichtung zum Klassieren von staubfoermigen Schuettguetern
SU1316717A1 (ru) * 1985-12-27 1987-06-15 Алтайский политехнический институт им.И.И.Ползунова Вибровоздушный классификатор сыпучих материалов
DE3621221A1 (de) * 1986-06-25 1988-01-14 Pfeiffer Fa Christian Verfahren zur windsichtung und windsichter
DE3622413C2 (de) * 1986-07-03 1995-08-03 Krupp Polysius Ag Sichter
DE3843338A1 (de) * 1988-12-22 1990-06-28 Krupp Polysius Ag Sichter

Also Published As

Publication number Publication date
DE59106024D1 (de) 1995-08-24
EP0484758A3 (en) 1992-09-23
ES2078411T3 (es) 1995-12-16
CA2055124C (fr) 1996-04-23
ATE125176T1 (de) 1995-08-15
CA2055124A1 (fr) 1992-05-09
EP0484758A2 (fr) 1992-05-13
DE9015363U1 (de) 1991-01-17
US5232096A (en) 1993-08-03

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