EP0250921B1 - Sichter - Google Patents

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Publication number
EP0250921B1
EP0250921B1 EP87108132A EP87108132A EP0250921B1 EP 0250921 B1 EP0250921 B1 EP 0250921B1 EP 87108132 A EP87108132 A EP 87108132A EP 87108132 A EP87108132 A EP 87108132A EP 0250921 B1 EP0250921 B1 EP 0250921B1
Authority
EP
European Patent Office
Prior art keywords
classifying
air
rotor
classifier
elements
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
EP87108132A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0250921A3 (en
EP0250921A2 (de
Inventor
Gotthardt Dipl.-Ing. Blasczyk
Heinrich Dipl.-Ing. Henne
Hubert Dipl.-Ing. Eickholt
Otte Dipl.-Ing. Heinemann
Norbert Bredenhöller
Peter Dipl.-Ing. Tiggesbäumker
Ludger Dipl.-Ing. Kimmeyer
Michael Dr.-Ing. Von Seebach
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius 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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0250921A2 publication Critical patent/EP0250921A2/de
Publication of EP0250921A3 publication Critical patent/EP0250921A3/de
Application granted granted Critical
Publication of EP0250921B1 publication Critical patent/EP0250921B1/de
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
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • 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
    • B07B11/04—Control arrangements

Definitions

  • a classifier with the generic features of claim 1 mentioned above is known from US-A-3,015,392.
  • an intermediate ring is provided inside the rotor, which divides the interior of the rotor into an active lower part and a non-active part divided upper part and which can be adjusted in the vertical direction by means of a threaded spindle.
  • the air flow in the classifier is adjusted to a desired height range in the known classifier.
  • the division of the spiral serving to supply the viewing air by one or more horizontal dividing walls is provided in the known classifier in order to achieve a uniform air distribution over the entire vertical height of the viewing room.
  • a classifier is also known from SU-A-816 574, in which the visible material is thrown radially outward from a spreading disc and here enters a spirally rising air stream which takes the fine material with it while the coarse material falls down. In the area of the cone rings arranged below the spreading disc, the downward flow of coarse material is checked.
  • the classifying air is supplied via two channels, firstly into the actual classroom surrounding the spreading disc and secondly - for the purpose of indulgence - below the spreading disc into the area of the two cone parts.
  • a common throttle is provided, by means of which the air flow can be directed more into the upper or more into the lower chamber, so that a more or less large proportion of the total constant air volume for the actual sighting (in the lower room ) can be provided.
  • a classifier is known in which the outer wall of the classroom and the rotor by ring slide have closable air inlet or air outlet openings, the dwell time of the classifying air in the classifier and the flow direction can be changed by adjusting the ring slide.
  • the invention has for its object to develop a classifier corresponding to the type mentioned in such a way that the selectivity improves and in particular entrainment of coarse material is avoided by the fine air loaded with sifting air.
  • the amount and / or the speed of the sight air flowing into the individual height areas of the sight space can be optimally adapted to the respective conditions, in particular the load in the individual sight space areas. If the distribution of the classifying air in the vertical direction is controlled and adjusted in this way before entering the classifying room, it is particularly avoided that the classifying air flows into the lower area of the classifying room and leads to undesired entrainment of coarse particles into the fine material room, while the sighting in the upper area of the visual space is deteriorated at the same time.
  • the possibility of adjustment according to the invention can therefore achieve a significant improvement in the selectivity of the classifier.
  • the housing of the sifter shown contains in the upper region a spiral 1 for supplying the viewing air, which opens tangentially into the viewing space 2 and is divided into two channels 5, 6 and 7 by three horizontal dividing walls 3, 4.
  • elements designed as adjustable flaps 8, 9, 10 are provided for setting the amount of air supplied to the individual channels 5, 6, 7.
  • the flaps 8, 9, 10 arranged in pairs are actuated, for example, via setting levers 11 and chains 12, the flaps 8, 9 and 10 being adjustable independently of one another.
  • a rotor 13 is arranged in the classifier housing and can be rotated about a vertical axis 14 and is driven via a shaft 15 by a motor (not illustrated) arranged on the classifier housing.
  • the rotor 13 is equipped on its circumference with rotor blades 16 which are carried by ring disks 17 which are connected via webs 18 to a bush 19 surrounding the shaft 15.
  • the shaft 15 is supported at the lower end in a bearing 20 which is supported by radial struts 21.
  • the lower end face of the rotor 13 is open and has radially extending struts 22.
  • the upper end face of the rotor 13 is formed by a plate 23 which carries distributor strips 24 arranged radially on its upper side.
  • a deflection ring 27 is provided at a distance from the circumference of the plate 23, which deflects the visible material thrown off the plate 23 downward into the viewing space 2.
  • the classifier housing is provided with a funnel 28 for removing the coarse material. Furthermore, there is a further funnel 29 below the open lower end face of the rotor 13, to which a plurality of connections 30 (for example four connections 30 evenly distributed around the circumference) are connected in the exemplary embodiment shown.
  • Air guiding elements 31 are provided at the outlet end of the spiral 1 for supplying the classifying air. As FIG. 2 shows, these air guide elements 31 are inclined in the sense of the flow direction of the viewing air flowing approximately tangentially into the viewing space 2.
  • the function of the sifter shown is as follows: The visible material that is fed in via the air conveyor trough 25 and the distributor bell 26 in a uniform distribution to the center of the plate 23 is conveyed outwards by the movement of the rotor 13 and is additionally evened out by the distributor strips 24. The visible material is thrown off the plate 23 with a moderate radial speed component and deflected downward by the deflection ring 27. It then penetrates the view space 2 from top to bottom in the form of a uniform good veil.
  • the classifying air is supplied via channels 5, 6 and 7 to the spiral 1, the amount of classifying air flowing into the individual height areas of the classifying area 2 being optimally adapted to the respective conditions by adjusting the flaps 8, 9 and 10. Since there is generally a larger load in the upper area of the viewing space 2, it is usually expedient to operate the upper duct 5 with a larger amount of air than the lower duct 7.
  • the fine and coarse goods are separated. While the coarse material falls down and is discharged through the funnel 28, the fine material together with the classifying air reaches the interior of the rotor 13 and is discharged via the connections 30.
  • the air guiding elements 31 at the outlet end the spiral 1 serve to maintain the swirl of the air flow, while the rotor blades 16 predominantly fulfill the task of preventing coarse material particles adhering to the fine material from entering the interior of the rotor 13.
  • the sifting air laden with fine material discharged via the connections 30 reaches one or more external separators in which the fine material (finished product) is separated from the sifting air.
  • the classifying air can then be fed to the spiral 1 again via an external air circulation fan (air circulation mode). Instead, however, it is also possible to discard the fine air that has been freed from the fine material (possibly after further dedusting) and to suck in the clear air from the environment (one pass of the clear air through the classifier).
  • the fine air loaded with fine material can also be drawn off through the upper end of the rotor.
  • a system of channels arranged in a star shape is expediently provided on the upper end face of the rotor instead of a closed plate 23, which are only open at their inner and outer ends and through which the visible material fed centrally via the distributor bell 26 is fed to the viewing space 2 .
  • the spiral 1 in three arranged one above the other Channels 5, 6 and 7 is divided, it is of course also possible within the scope of the invention to provide only two or more than three channels.
  • the spiral 1 also has a second air inlet opening 32, which is offset on the circumference by approximately 180 ° with respect to the other air inlet opening 33. Also in the area of this second air inlet opening 32, elements (e.g. flaps) are provided for setting the amount of air supplied through the individual channels. Such additional air inlet openings promote the maintenance of the swirl with which the classifying air enters the classroom 2.
  • the setting option according to the invention not only achieves a significant improvement in the separating power of the classifier, but it also reduces the specific air requirement of the classifier overall, which enables considerable energy savings.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
EP87108132A 1986-07-03 1987-06-04 Sichter Expired - Lifetime EP0250921B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3622413A DE3622413C2 (de) 1986-07-03 1986-07-03 Sichter
DE3622413 1986-07-03

Publications (3)

Publication Number Publication Date
EP0250921A2 EP0250921A2 (de) 1988-01-07
EP0250921A3 EP0250921A3 (en) 1989-08-30
EP0250921B1 true EP0250921B1 (de) 1995-12-27

Family

ID=6304341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108132A Expired - Lifetime EP0250921B1 (de) 1986-07-03 1987-06-04 Sichter

Country Status (5)

Country Link
US (1) US4792393A (enrdf_load_stackoverflow)
EP (1) EP0250921B1 (enrdf_load_stackoverflow)
DE (2) DE3622413C2 (enrdf_load_stackoverflow)
ES (1) ES2080716T3 (enrdf_load_stackoverflow)
IN (1) IN170755B (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3808022A1 (de) * 1988-03-10 1989-09-21 Krupp Polysius Ag Sichter
DE3808023A1 (de) * 1988-03-10 1989-09-21 Krupp Polysius Ag Sichter
DE3843338A1 (de) * 1988-12-22 1990-06-28 Krupp Polysius Ag Sichter
DE4014342C2 (de) * 1990-05-04 1994-06-23 Heinz Jaeger Windsichter
DE9015363U1 (de) * 1990-11-08 1991-01-17 Christian Pfeiffer Maschinenfabrik GmbH & Co KG, 4720 Beckum Vorrichtung zur Materialdispergierung
DE19511314C2 (de) * 1995-03-28 1997-02-06 Omya Gmbh Zentrifugalkraftsichter
DE19511313C2 (de) * 1995-03-28 1997-07-17 Gkn Walterscheid Getriebe Gmbh Schalteinrichtung für ein Zahnradgetriebe
FR2741286B1 (fr) * 1995-11-21 1998-01-23 Fcb Separateur a air a action centrifuge
DE19606672A1 (de) 1996-02-22 1997-08-28 Krupp Polysius Ag Sichter
DE19708956A1 (de) * 1997-03-05 1998-09-10 Krupp Polysius Ag Sichter
DE19811385C2 (de) * 1998-03-16 2003-08-28 Motan Materials Handling Gmbh Granulatstrom-Aufteiler für Gegenstromsichter
DE10022536A1 (de) * 2000-05-09 2001-11-29 Loesche Gmbh Mühlensichter
EP1561519A1 (fr) * 2004-02-04 2005-08-10 Magotteaux International S.A. Séparateur de matière granuleuse
DE102006044833B4 (de) * 2006-09-20 2010-01-21 Babcock Borsig Service Gmbh Zentrifugalsichter und Verfahren zum Sichten
US8172088B2 (en) * 2010-03-08 2012-05-08 Laitram, L.L.C. Air separator
US9211547B2 (en) 2013-01-24 2015-12-15 Lp Amina Llc Classifier
DE102014001384B4 (de) * 2014-02-01 2018-03-29 Khd Humboldt Wedag Gmbh Ringförmiger Kaskadensichter mit nachgeschaltetem Stabkorbsichter
EP3127621A4 (en) * 2014-03-31 2017-12-06 Hosokawa Micron Corporation Classifier
CN109821744B (zh) * 2019-03-05 2021-02-19 无锡锡麦粮油装备工程有限公司 一种清粉机用风量调节装置
CN111774304A (zh) * 2020-06-30 2020-10-16 湖北北新建材有限公司 一种自动分离石膏中大颗粒的装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913109A (en) * 1956-05-07 1959-11-17 Williams Patent Crusher & Pulv Air seal for separating devices
DE1130261B (de) * 1957-08-06 1962-05-24 Zentrales Projektierungsbuero Vorrichtung zum Entstauben, Aussortieren, Trocknen, Befeuchten sowie chemischen Behandeln feinstueckiger Stoffe, insbesondere Haecksel von Einjahres-pflanzen u. dgl.
DE1112382B (de) * 1958-01-16 1961-08-03 Jakob Heyd Aufrechtstehender Fliehkraft-Umluftsichter mit einem mit Gefaelle in den Sichtraum fuehrenden Sichtgut-Aufgaberohr
US3015392A (en) * 1959-08-14 1962-01-02 Microcyclomat Co Vertical feed centripetal classifier
AT232452B (de) * 1960-12-21 1964-03-25 Escher Wyss Ag Umwälzstreusichter
US3372805A (en) * 1965-12-29 1968-03-12 Microcyclomat Co Fine particle classifier
US3503502A (en) * 1968-09-26 1970-03-31 Harlan J Donelson Jr Particulate material cleaner
DE2817725A1 (de) * 1978-04-22 1979-11-08 Polysius Ag Windsichter
GB2041251B (en) * 1978-11-24 1982-10-20 Hosolawa Funtai Kogaku Kenkyus Pneumatic classifier
US4296864A (en) * 1979-07-17 1981-10-27 Onoda Cement Co., Ltd. Air classifier
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
DE3538832A1 (de) * 1985-10-31 1987-05-07 Krupp Polysius Ag Umluftsichter

Also Published As

Publication number Publication date
DE3622413C2 (de) 1995-08-03
ES2080716T3 (es) 1996-02-16
US4792393A (en) 1988-12-20
EP0250921A3 (en) 1989-08-30
IN170755B (enrdf_load_stackoverflow) 1992-05-16
DE3751648D1 (de) 1996-02-08
EP0250921A2 (de) 1988-01-07
DE3622413A1 (de) 1988-01-07

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