EP0115057A2 - Séparateur pneumatique pour le domaine des matières fines - Google Patents

Séparateur pneumatique pour le domaine des matières fines Download PDF

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Publication number
EP0115057A2
EP0115057A2 EP83113017A EP83113017A EP0115057A2 EP 0115057 A2 EP0115057 A2 EP 0115057A2 EP 83113017 A EP83113017 A EP 83113017A EP 83113017 A EP83113017 A EP 83113017A EP 0115057 A2 EP0115057 A2 EP 0115057A2
Authority
EP
European Patent Office
Prior art keywords
classifying
air
wheels
axis
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.)
Granted
Application number
EP83113017A
Other languages
German (de)
English (en)
Other versions
EP0115057A3 (en
EP0115057B1 (fr
Inventor
Roland Dr.-Ing. Nied
Herbert Dipl.-Ing. Horlamus
Fritz Kaiser
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.)
Hosokawa Alpine AG
Original Assignee
Alpine 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 Alpine AG filed Critical Alpine AG
Priority to AT83113017T priority Critical patent/ATE27556T1/de
Publication of EP0115057A2 publication Critical patent/EP0115057A2/fr
Publication of EP0115057A3 publication Critical patent/EP0115057A3/de
Application granted granted Critical
Publication of EP0115057B1 publication Critical patent/EP0115057B1/fr
Expired 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
    • B07B7/083—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 an air classifier, consisting of a vertical-axis viewing chamber with a cylindrical upper part and a funnel-shaped lower part and a viewing device arranged in the upper part in the form of a rotating classifying wheel, which is flowed from the outside to the inside in a direction opposite to its centrifugal direction has running blades, the visual goods either being fed together with the visual air flowing in through the lower opening of the lower part or directly into the visual chamber, the coarse material being discharged through the lower opening of the lower part and the fine material together with the visual air coming out of the classifying wheel through an upward direction the outlet pipe emerging from the classifier is withdrawn.
  • An air classifier of the type mentioned above, in which the material to be viewed is fed into the classifying chamber, dispersed in the classifying air. is z. B. in GB-PS 927 876 described.
  • DE-PS 17 57 582 shows a wind separator of the same type with direct supply of the material to be classified into the viewing chamber.
  • the separation limit which can be achieved with such air classifiers essentially depends on the diameter and the peripheral speed of the classifying wheel. For a given size, the lower the separation limit, the higher the peripheral speed or speed of the classifying wheel is selected. Increasing the class of the visible wheel also results in a rapid increase in wear and energy requirements, so that economical work is only possible down to a certain cut-off limit.
  • the peripheral speed of the classifying wheel and the radial speed of the classifying air are kept constant when entering the classifying wheel on the classifying wheel circumference, the separating limit becomes larger as the classifying wheel diameter increases and thus correspondingly increases Throughput is also larger, ie it is shifted to a larger grain area. Therefore, if a large classifying wheel is to cut just as finely as a small one, the peripheral speed must also be increased. However, this means that, in addition to increased wear and energy requirements, strength and storage problems also arise.
  • the invention is therefore based on the object of providing an air classifier of the type required, with which high throughputs can be achieved economically, even in the finest range, while avoiding the disadvantages mentioned above.
  • This object is achieved in that at least two identical, individually driven classifying wheels designed for fine classifying are arranged as classifying devices in the classifying chamber of the air classifier.
  • the arrangement according to the invention has the following advantages: there is a compact design in which only one fine material line and a lateral conveying or metering device opening into the classifying chamber are required for the classifying material supply.
  • the visible material can also be dispersed in the visible air in a manner known per se and can be supplied with it through the lower opening of the lower part of the air classifier.
  • the air classifier z. B. can also be assembled particularly easily with an air-powered fine mill, in particular with a fluidized bed jet mill, by attaching it from below to the lower part of the air classifier.
  • the ground material then carried up by the grinding air from the mill becomes the feed material of the classifier and the grinding air itself becomes the visible air.
  • the classifying wheels can be arranged in such a way that their axes of rotation are arranged in a plane perpendicular to the classifier axis or on the surface of an imaginary circular cone, the axis of which is the classifier axis.
  • the arrangement of a common, centrally located outlet port for classifying air and fine material is particularly simple.
  • an arrangement of the classifying wheels can also be advantageous, in which the axes of rotation of the classifying wheels run in a plane perpendicular to the classifying axis and parallel to one another and adjacent classifying wheels are arranged offset from one another by at least the classifying wheel height. Any number of classifying wheels can be accommodated in the smallest possible space, without neighboring classifying wheels being able to influence one another through the coarse material they each throw off.
  • Classifying wheels are preferably used which, in a manner known per se, have a multiplicity of narrow blades which run radially or obliquely to the classifying wheel circumference, because their spraying grain strength and their insensitivity to fluctuations in the quantity and distribution of the task size make them particularly suitable for solving the task at hand.
  • the exemplary embodiment shows a wind sifter 1 with a vertical axis 2, the viewing chamber of which consists of the cylindrical upper part 3 and the funnel-shaped lower part 4.
  • a cylindrical container 5 connected to the funnel-shaped lower part 4 with attached outlet funnel 6 is provided, the outer diameter of which is larger than the diameter of the lower opening of the funnel-shaped lower part 4, and into which the classifying air line 14 opens tangentially.
  • four classifying wheels 7 are arranged in a star shape, the rotational axes 8 of which lie in a plane perpendicular to the classifying axis 2 and extend radially to the latter.
  • the classifying wheels 7 are designed as paddle wheels which have a multiplicity of narrow blades 9 which run radially or obliquely to the class of the classifying wheels.
  • Each classifying wheel 7 is seated on a shaft 10 which is mounted in a bearing housing 11 which is laterally attached to the upper part 3.
  • Each classifying wheel 7 is driven by a three-phase motor via pulleys (not shown here), all three-phase motors being controlled jointly by a frequency converter.
  • the flow pattern of the incoming classifying air is determined by the guide vanes 15, which are aligned parallel to the classifying axis 2.
  • An airtight discharge element, for. B. a cell lock (not shown) for the excreted, falling down coarse is well attached to the flange of the discharge funnel 6 during operation of the air classifier 1.
  • a guide surface 16 is arranged concentrically to the sighting axis within the sighting chamber 3, 4, which is formed at the bottom as a cylinder jacket and at the top as an upwardly widening truncated cone jacket, the upper edge of which runs at a distance from the sighting wheels 7.
  • the cylinder diameter corresponds to the diameter of the lower opening of the lower part 4.
  • the guide surface 16 is connected to the upper part 3 via three struts 17. A height adjustability to adapt to different operating conditions is not provided in the embodiment shown here.
  • the dosing screw 18 attached to the side of the upper part 3 is used for supplying visible material.
  • the upper part 3 is designed divided on the flange 19 so that the lower part of the upper part 3 with guide surface 16, lower part 4, cylindrical container 5 and discharge funnel 6 can be removed as a coherent component for inspection or cleaning purposes.
  • the fine classifier formed by the classifying wheels 7, the separating limit of which is set independently of the quantity and grain distribution of the goods offered works together with a simple coarse classifier located in the area of the guide vanes 15, the separating limit of which depends very much on the material load in such a way that the separation limit moves into the fine range with increasing load and vice versa.
  • This has the effect that, in the start-up phase, coarse material automatically accumulates in the classifying chamber until the separation limit of the coarse classifier corresponds to that of the classifying wheels at a certain material load, thus achieving the continuous operating state.
  • These properties of the described air classifier contribute to the fact that high material throughputs with a sharp separation of fine material and coarse material down to the very finest range, ie. H. Separation limits less than 8 ⁇ m can be achieved.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Cell Separators (AREA)
EP83113017A 1983-01-29 1983-12-23 Séparateur pneumatique pour le domaine des matières fines Expired EP0115057B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83113017T ATE27556T1 (de) 1983-01-29 1983-12-23 Windsichter fuer den feinstbereich.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3303078A DE3303078C1 (de) 1983-01-29 1983-01-29 Windsichter fuer den Feinstbereich
DE3303078 1983-01-29

Publications (3)

Publication Number Publication Date
EP0115057A2 true EP0115057A2 (fr) 1984-08-08
EP0115057A3 EP0115057A3 (en) 1985-10-30
EP0115057B1 EP0115057B1 (fr) 1987-06-03

Family

ID=6189605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83113017A Expired EP0115057B1 (fr) 1983-01-29 1983-12-23 Séparateur pneumatique pour le domaine des matières fines

Country Status (5)

Country Link
US (1) US4528091A (fr)
EP (1) EP0115057B1 (fr)
JP (1) JPS59142877A (fr)
AT (1) ATE27556T1 (fr)
DE (1) DE3303078C1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209663A1 (fr) * 1985-06-14 1987-01-28 Krupp Polysius Ag Procédé et installation pour le broyage fin des matériaux
EP0244744A2 (fr) * 1986-05-07 1987-11-11 OMYA GmbH Crible centrifuge
EP0638365A2 (fr) * 1993-08-07 1995-02-15 Hosokawa Alpine Aktiengesellschaft Procédé et dispositif pour séparer des matières solides à grains fins en deux fractions granulométriques
US5667075A (en) * 1995-04-07 1997-09-16 Hosokawa Alpine Aktiengesellschaft Classifying wheel for centrifugal-wheel classifiers
DE10151325A1 (de) * 2001-10-17 2003-05-08 Wester Tonbergbau Kg Windsichter
EP1398086A1 (fr) * 2002-09-12 2004-03-17 Ehinger Impianti S.r.l. Trieur de particules

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508889C1 (de) * 1985-03-13 1992-02-20 Alpine Ag, 8900 Augsburg Windsichter mit verschleissfreiem Sichtrad
DE3515026C1 (de) * 1985-04-25 1986-09-18 Fa. Christian Pfeiffer, 4720 Beckum Drehluft-Schleuderkorb-Sichter
DE3521638C2 (de) * 1985-06-15 1994-03-31 Kloeckner Humboldt Deutz Ag Streuwindsichter zum Sichten von feinkörnigem Gut
DE3621221A1 (de) * 1986-06-25 1988-01-14 Pfeiffer Fa Christian Verfahren zur windsichtung und windsichter
DD257212A1 (de) * 1987-01-22 1988-06-08 Dessau Zementanlagenbau Veb Windsichter zur sichtung von schuettguetern feinster koernung
US4793917A (en) * 1987-04-15 1988-12-27 Institut Khimii Tverdogo Tela I Pererabotki Mineralnogo Syrya Sibirskogo Otdelenia Akademii Nauk Ussr Centrifugal classifier for superfine powders
DE3838871C2 (de) * 1988-01-22 1994-10-27 Nied Roland Windsichter
DE3814458A1 (de) * 1988-04-28 1989-11-09 Krupp Polysius Ag Windsichter
EP0369399B1 (fr) * 1988-11-17 1994-08-10 Roland Dr.-Ing. Nied Séparateur pneumatique
DE58900995D1 (de) * 1988-12-27 1992-04-23 Roland Nied Verfahren zur feinstsichtung und vorrichtung zur durchfuehrung des verfahrens.
DE4140656C1 (fr) * 1991-12-10 1992-09-10 Alpine Ag, 8900 Augsburg, De
NO300257B1 (no) * 1995-04-07 1997-05-05 Sinvent As Apparat for sortering av partikkelformig materiale
DE102005001542B4 (de) * 2005-01-13 2009-06-10 Lehigh Technologies, LLC, Naples Mehrrad-Windsichter, separate Sichterradeinheit und separate Sichterkammereinheit
DE102006048850A1 (de) * 2006-10-16 2008-04-17 Evonik Degussa Gmbh Amorphe submicron Partikel
DE102006048865A1 (de) * 2006-10-16 2008-04-17 Roland Dr. Nied Verfahren zur Erzeugung feinster Partikel und Strahlmühle dafür sowie Windsichter und Betriebsverfahren davon
DE102006048864A1 (de) * 2006-10-16 2008-04-17 Roland Dr. Nied Verfahren zur Erzeugung feinster Partikel und Strahlmühle dafür sowie Windsichter und Betriebsverfahren davon
DE102013002237B3 (de) * 2013-02-11 2014-05-22 Microtec Gmbh Sichtermühle
DE202015009079U1 (de) 2015-08-27 2016-10-07 Josef Fischer Kryogenmahlvorrichtung
EP3135380B1 (fr) 2015-08-27 2017-10-11 Josef Fischer Dispositif et procédé de broyage cryogénique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB927876A (en) * 1960-10-21 1963-06-06 Ass Portland Cement Improved mechanical air classifier

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US234724A (en) * 1880-11-23 F austin prinz
US969971A (en) * 1908-10-19 1910-09-13 William J Ehrsam Grader.
US1933606A (en) * 1930-11-25 1933-11-07 Sturtevant Mill Co Air separator
US2269412A (en) * 1940-07-18 1942-01-06 Sturtevant Mill Co Air separator
DE1167634B (de) * 1961-07-12 1964-04-09 Alpine Ag Maschinenfabrik Und Sichter mit Sichtrad
US3384238A (en) * 1966-02-17 1968-05-21 Air Sifters Inc Classifying system
DE1757582C2 (de) * 1968-05-20 1976-03-11 The Georgia Marble Co., Atlanta, .Ga. (V.St.A.) Schleuderkorb-Windsichter
DE3038625A1 (de) * 1980-10-13 1982-05-19 Fa. Christian Pfeiffer, 4720 Beckum Drehluft-fliehkraft-streusichter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB927876A (en) * 1960-10-21 1963-06-06 Ass Portland Cement Improved mechanical air classifier

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209663A1 (fr) * 1985-06-14 1987-01-28 Krupp Polysius Ag Procédé et installation pour le broyage fin des matériaux
EP0244744A2 (fr) * 1986-05-07 1987-11-11 OMYA GmbH Crible centrifuge
EP0244744A3 (en) * 1986-05-07 1989-05-17 Omya Gmbh Centrifugal sifter
EP0638365A2 (fr) * 1993-08-07 1995-02-15 Hosokawa Alpine Aktiengesellschaft Procédé et dispositif pour séparer des matières solides à grains fins en deux fractions granulométriques
EP0638365A3 (fr) * 1993-08-07 1995-09-13 Hosokawa Alpine Ag Procédé et dispositif pour séparer des matières solides à grains fins en deux fractions granulométriques.
US5894935A (en) * 1993-08-07 1999-04-20 Hosokawa Alpine Aktiengesellschaft Method and device to separate a fine-grained solid material into two fractions
US5667075A (en) * 1995-04-07 1997-09-16 Hosokawa Alpine Aktiengesellschaft Classifying wheel for centrifugal-wheel classifiers
DE10151325A1 (de) * 2001-10-17 2003-05-08 Wester Tonbergbau Kg Windsichter
DE10151325B4 (de) * 2001-10-17 2006-07-27 Wester Tonbergbau Kg Windsichter
EP1398086A1 (fr) * 2002-09-12 2004-03-17 Ehinger Impianti S.r.l. Trieur de particules

Also Published As

Publication number Publication date
US4528091A (en) 1985-07-09
DE3303078C1 (de) 1984-05-30
ATE27556T1 (de) 1987-06-15
EP0115057A3 (en) 1985-10-30
JPS59142877A (ja) 1984-08-16
JPS6349548B2 (fr) 1988-10-05
EP0115057B1 (fr) 1987-06-03

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