EP0460490B1 - Séparateur pneumatique - Google Patents

Séparateur pneumatique Download PDF

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Publication number
EP0460490B1
EP0460490B1 EP91108600A EP91108600A EP0460490B1 EP 0460490 B1 EP0460490 B1 EP 0460490B1 EP 91108600 A EP91108600 A EP 91108600A EP 91108600 A EP91108600 A EP 91108600A EP 0460490 B1 EP0460490 B1 EP 0460490B1
Authority
EP
European Patent Office
Prior art keywords
classifier
wheels
air
housing
conduit
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
EP91108600A
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German (de)
English (en)
Other versions
EP0460490A2 (fr
EP0460490A3 (en
Inventor
Frank Fischer-Helwig
Albert Süssegger
Albrecht Dr. Wolter
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25893964&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0460490(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0460490A2 publication Critical patent/EP0460490A2/fr
Publication of EP0460490A3 publication Critical patent/EP0460490A3/de
Application granted granted Critical
Publication of EP0460490B1 publication Critical patent/EP0460490B1/fr
Anticipated expiration legal-status Critical
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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 a rod basket sifter for sifting granular material in at least three fractions, consisting of a substantially vertically arranged housing with sifting air supply and sifting material supply, with sifting wheels arranged concentrically in the housing and with sifting air discharge and discharges for the fine material and the coarse material.
  • a known classifier of the type mentioned at the outset (EP-A-0 250 747) has an upper caulking chamber with a rotating rod basket and a downstream lower indulgence chamber also with a rotating rod basket, the axes of rotation of the two rod baskets lying one inside the other.
  • the fine material is extracted essentially coaxially together with the classifying air from the feed material fed into the classifier from above in the pre-screening room, and the remaining good material is introduced into the separate lower inspection room with the lower rod basket, where it is separated into coarse and medium goods.
  • the known sifter is able to sift a good material in three grain fractions, but this result is achieved by connecting an upper rod basket sifter (presifter) and a lower rod basket sifter (sifter) in series, so that the known sifter is characterized by a large overall height .
  • a separation of the feed material into four grain fractions would no longer be conceivable or practically impossible with the known classifier construction.
  • both the upper pre-classifier and the separate lower post-classifier must each be equipped with their own classifying air supply housings, including classifying air regulating elements, which contributes to the complexity of the known classifier design.
  • the invention has for its object to provide a bar sifter, which is characterized by a compact design, and still allows the sifting of a feed in even more than three grain fractions with high yield and sharp separation of the desired grain fractions from each other.
  • the classifying wheels are mounted separately in the housing and can be driven independently of one another. This enables the classifier wheels to be driven at different speeds and / or with mutually opposite directions of rotation and thus an optimal setting of the classifier on the item to be viewed.
  • a material distributor plate is arranged on the outer classifier wheel and is loaded with the feed material from above.
  • At least one further line of sight air is connected to the housing below the classifying wheels and opens from below into the free space between the classifying wheels.
  • the classifier for classifying granular material consists of a substantially vertically standing housing (1) with concentrically nested therein and rotatable classifying wheels (2, 3, and 4).
  • the inner classifier wheel (2) is firmly connected to a central drive shaft (5) and the outer classifier wheels (3 and 4) are rotatably supported thereon, as well as with each other, by means of support bearings (6 and 7).
  • the classifying wheels (3 and 4) are connected to hollow shafts (8 and 9), which in turn are held so as to be rotatable relative to the central shaft (5) and with one another in bearings (10 and 11).
  • the classifying wheels (2, 3, and 4) are very advantageously equipped with rod baskets (12, 13 and 14), the openings of which decrease between the rods (not shown in the drawing) for the passage of the visible air from the outer rod basket to the inner neighboring rod basket are trained. Compensation for the passage area for the sight air, which decreases from the outside inward with the same length of the sight wheels, can be created by the length of the sight wheels increasing from the outside in, so that the passage speed of the sight air in all sight wheels either remains approximately the same or even decreases.
  • the thickness of the basket rods can be varied from inside to outside.
  • a line (15) opening into the classifier housing (1) is arranged for the supply of classifying air, with known, not shown, adjustable venetian blind elements, while a line (16) is provided below the innermost classifier wheel (2) for the removal of classifying air from the classifier.
  • a line (16) is provided below the innermost classifier wheel (2) for the removal of classifying air from the classifier.
  • openings (17) at the top of the classifier housing for supplying the material to be sifted and in the lower area immediately below the classifier wheels (2, 3 and 4) diagonally downwardly extending channels (18, 19 and 20) for the discharge of those in the classifier separated grain fractions arranged.
  • the inner clear width of the channels (18 and 19) is here exactly on the distance between the rod baskets (12, 13 and 14) located or free annular space, so that any Mixing between the grain fractions already separated from the classifying air stream and separated from one another is avoided with certainty.
  • the classifier wheels (2, 3 and 4) are rotated by means of a drive device, not shown in the drawing, which is connected to the shafts (5, 8 and 9) . Subsequently, line of sight air is fed to the classifier through the line (15) and the material to be sifted is fed to the classifier in the direction of the arrow (21) from above through the openings (17).
  • the sighted material is caught by the sifting air flow and taken along by it in the direction of the arrow (22), due to the inward increasing speed of rotation of the rod baskets (14, 13) and the rod basket (12) to separate the feed material into three fractions, namely in Coarse goods (arrow 23), medium goods (arrow 24) and fines (arrow 25), which fall down into the channels (20, 19 and 18) and are removed separately from the classifier.
  • the from the sifting air transported into the inside of the rod basket (12) and discharged from there via the line (16) to the outside represents the fourth fraction, the finest fraction, which in a suitable separate device, e.g. B. filter or cyclone, separated from the classifying air and can be obtained in this way.
  • a suitable separate device e.g. B. filter or cyclone
  • a further classifying air line (26) is connected to the housing (1) of the classifier, specifically below the line (15), with valves Guide branch lines (27, 28, 29) into the channels (18, 19, 20).
  • valves Guide branch lines (27, 28, 29) are connected to the housing (1) of the classifier, specifically below the line (15), with valves Guide branch lines (27, 28, 29) into the channels (18, 19, 20).
  • branch lines (27, 28, 29) more or less additional secondary air can be introduced into the channels (18, 19, 20) with the help of the valves, as required, which then counteracts the fractions (23, 24, 25) flows upwards into the free space between the classifying wheels (2, 3, 4), from where it, together with the classifying air flow (22), reaches the interior of the rod basket (12) and from there via the line (16) is discharged to the outside.
  • the fraction (23, 24, 25) which is separated out in the classifier and falls down is very advantageously subjected to an after-inspection by the secondary sifting air flowing from the bottom up, any missing grain which is found in the down-falling fraction (23, 24, 25), recorded with certainty and separated from the group.
  • the separator's sharpness can be significantly improved in this way.
  • a crop distributor plate (30) is arranged on the outer classifier wheel (4) at the top and is loaded with the feed material to be sifted (arrow 31) from above.
  • the feed material is grasped by the distributor plate (30) and thrown approximately radially outwards.
  • the feed material thrown outwards from the distributor plate (30) strikes a baffle ring (32) arranged in the classifier housing (1) at a distance from the distributor plate (30), from which it falls down into the classifying air stream (22) in the direction of the arrow (33) .
  • the agglomerates or coarser goods that are still present in the feed material are comminuted or disagglomerated before they reach the classifying air stream (22) .
  • the distributor plate (30) can additionally be equipped in the outer area at the top with known centrifugal blades or impact elements.
  • the feed material pretreated in this way passes into the space between the sight air guide elements (34) and the guide elements or rods of the rod basket (14) of the outer classifier wheel (4), where it is caught by the sight air flow (arrows 22) and by it in the direction of the arrow (22 ) carried inwards and is separated from one another in three fractions in the operating mode already described above in connection with the classifier according to FIG. 1. Since the classifier shown in FIG. 2, in its other components, in particular with regard to the design and arrangement of the classifying wheels (2, 3, 4), the drive, the supply and removal of classifying air and the supply of primary and secondary air from the one in FIG 1 does not distinguish between the classifiers shown, for the sake of simplicity these components and drives, which are therefore identical in FIG. 2, have also been given the same reference numbers.
  • the classifier wheels (2, 3, 4) are driven from above in the classifiers shown in FIGS. 1 and 2. However, there is also the possibility of driving the classifier wheels from below, or in particular in the case of a classifier with only two classifier wheels, one classifier wheel from above and the second classifier wheel from below. In this context, at least the sight air discharge (16) can also be moved upwards or upwards from the classifier. In addition, it may also be appropriate to carry out the discharge of the middle fraction (arrow 24) and / or the discharge of the fine fraction (arrow 25) by subtracting a partial air stream.
  • the classifier according to the invention can also advantageously be used and operated as a so-called two-section classifier in the partial final grinding of cement clinker.
  • the cement clinker which is pressed into flakes in a high-pressure roller press and then deagglomerated, is fed to the classifier shown in FIG. 2 from above in the direction of the arrow (31).
  • the first fraction obtained in the classifier namely the coarse material (arrow 23) is returned to the high-pressure roller press, while the medium material (arrow 24) is used in a post-grinding unit, e.g. B. abandoned ball mill and is accordingly comminuted in this.
  • the remilled material is then either fed to the classifier from above (arrow 35) through corresponding openings (36, 37) in the classifier housing and material distributor plate (30) and between the free space through which the classifying air flows the classifying wheels (3) and (4) introduced and sifted therein or directly mixed into the finished product.
  • a third, from the sight air through the basket rods of the classifying wheel (2) The finest fraction carried inwards is then discharged as a third finished product via the classifying air outlet (16).
  • the second fraction is discharged from the classifier as a finished product with the classifier air flow and separated from the classifier air in a separator (filter) connected to the classifier.
  • a separator filter
  • an annular web (38) is attached to the distributor plate (30) behind the openings (37).
  • the classifying wheels (2, 3 and 4) can be driven in the classifiers shown in the drawing figures as required, with the same direction of rotation and the same or different circulation speed or also with the opposite direction of rotation and the same or different circulation speed in order to optimally adapt the classifier to the material to be viewed or z. B. crushing and / or special deagglomeration effects.
  • the classifier according to the invention for classifying particularly fine-grained material into several fractions, with gases, such as eg. B. argon and the like are used.
  • a corresponding profiling of the rods can also be carried out to homogenize the flow of visible air through the passage openings between the rods of the rod baskets (12, 13 and 14) and thus to improve the selectivity.
  • the free openings between the bars for the passage of the visible air from the respective outer bar basket to the inner adjacent bar basket by adapting the shape of the bar, the number of bars and the height of the individual bar baskets, instead of increasing or decreasing or substantially constant.
  • any number of classifier wheels according to the invention can be nested concentrically in the classifier housing and arranged at a corresponding distance from one another and operated with different directions of rotation.
  • the crushing effect can also be intensified by the arrangement of scattering elements and / or impact elements on the crop distributor plate (30).

Claims (8)

  1. Séparateur à panier à barres, pour séparer un produit granuleux en trois fractions au moins, constitué d'un boîtier essentiellement vertical équipé d'une amenée d'air de séparateur et d'une amenée du produit à trier, contenant trois roues concentriques de séparation (2, 3, 4) et muni d'une sortie d'air de séparation ainsi que de boîtier pour le matériau à grains fin et pour le matériau à gros grains, caractérisé en ce que les roues de séparation (2, 3, 4) située dans le boîtier (1) sont logées concentriquement, avec un certain intervalle, l'une dans l'autre, de sorte qu'elles sont traversées successivement par l'air de séparation et en ce qu'une sortie du matériau (25, 18 ou 24, 19 ou 23, 20) est spécifiquement associée à chacune des roues de séparation.
  2. Séparateur selon la revendication 1, caractérisé en ce que les roues (2, 3, 4) situées dans le boîtier peuvent être entraînées séparément et indépendamment les unes des autres.
  3. Séparateur selon la revendication 1 ou 2, caractérisé en ce que la conduite (15) amenant l'air de séparation est montée latéralement et en haut sur le boîtier, tandis que la conduite (16) de sortie d'air est située dans le boîtier, en dessous de la roue de séparation (2) la plus centrale.
  4. Séparateur selon la revendication 1, 2 ou 3, caractérisé en ce que les roues de séparation (2, 3, 4) sont équipées de paniers à barres (12, 13, 14), la section libre entre les barres offertes au passage de l'air de séparation étant accordées aux exigences de la séparation, par différenciation du diamètre des barres ou de la hauteur d'un panier par rapport aux dimensions correspondantes du panier qu'il content, cette section libre étant plus grande, plus petite ou sensiblement égale.
  5. Séparateur selon la revendication 1, 2, 3 ou 4, caractérisé en ce que la roue externe de séparation (4) est recouverte en haut par un plateau distributeur (30) alimenté, par le haut, en produit de chargement (31).
  6. Séparateur selon la revendication 5, caractérisé en ce que l'assiette distributrice de produit (30) est percée d'ouvertures (37) débouchant dans les volumes libres situés entre les deux roues de séparation (3, 4).
  7. Séparateur selon une des revendications précédentes en particulier la revendication 3, caractérisé en ce que sur le boîtier (1), en dessous des roues de séparation (2, 3, 4), est raccordée au moins une autre conduite d'air de séparation (26), débouchant par-dessous dans les volumes libres situés entre des roues (2, 3, 4).
  8. Séparateur selon la revendication 7, caractérisé en ce que la conduite d'air de séparation (26) est raccordée à au moins une des sorties de produit séparé (16, 19, 20).
EP91108600A 1990-06-08 1991-05-27 Séparateur pneumatique Expired - Lifetime EP0460490B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4018361 1990-06-08
DE4018361 1990-06-08
DE4112018 1991-04-12
DE4112018A DE4112018A1 (de) 1990-06-08 1991-04-12 Sichter

Publications (3)

Publication Number Publication Date
EP0460490A2 EP0460490A2 (fr) 1991-12-11
EP0460490A3 EP0460490A3 (en) 1992-01-15
EP0460490B1 true EP0460490B1 (fr) 1994-10-19

Family

ID=25893964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108600A Expired - Lifetime EP0460490B1 (fr) 1990-06-08 1991-05-27 Séparateur pneumatique

Country Status (4)

Country Link
US (1) US5158182A (fr)
EP (1) EP0460490B1 (fr)
JP (1) JPH05245442A (fr)
DE (2) DE4112018A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015161A1 (de) * 2014-10-14 2016-04-14 Khd Humboldt Wedag Gmbh Anlage zum Mahlen und Sichten von Zementklinker

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DE19511314C2 (de) * 1995-03-28 1997-02-06 Omya Gmbh Zentrifugalkraftsichter
DE19629924C2 (de) * 1995-08-02 2001-04-12 Herbert Horlamus Vorrichtung und Verfahren zur Trennung von Teilchenströmen
DE19541797A1 (de) * 1995-11-09 1997-05-15 Temic Bayern Chem Airbag Gmbh Gasgenerator mit Treibgasstrom-Temperaturregelung und Verfahren zu seinem Betrieb
DE19643042C2 (de) * 1996-10-18 1998-07-30 Hosokawa Alpine Ag Vertikalachsiger Windsichter
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DE102005045591A1 (de) * 2005-09-23 2007-03-29 Polysius Ag Vorrichtung zum Sichten von Aufgabegut
WO2008086026A1 (fr) * 2007-01-10 2008-07-17 Koppern Equiptment, Inc. Séparateur à air pour matériaux broyés
US7993550B2 (en) * 2007-10-25 2011-08-09 Dan Chrzanowski Method of recycling filter media
US7854406B2 (en) * 2008-01-10 2010-12-21 Koppern Equipment, Inc. Air separator for comminuted materials
FR2976194B1 (fr) * 2011-06-08 2014-01-10 Pa Technologies Separateur dynamique pour materiaux pulverulents
DE102011055762B4 (de) 2011-11-28 2014-08-28 Maschinenfabrik Köppern GmbH & Co KG Vorrichtung zum Sichten von körnigem Gut und Mahlanlage
DE202012003141U1 (de) * 2012-01-20 2012-04-10 Khd Humboldt Wedag Gmbh Pneumatische Fördervorrichtung für Sichter
DE102013101517A1 (de) * 2013-02-15 2014-08-21 Thyssenkrupp Resource Technologies Gmbh Sichter und Verfahren zum Betreiben eines Sichters
US9440262B2 (en) * 2014-11-07 2016-09-13 Rec Silicon Inc Apparatus and method for silicon powder management
US9682404B1 (en) 2016-05-05 2017-06-20 Rec Silicon Inc Method and apparatus for separating fine particulate material from a mixture of coarse particulate material and fine particulate material
US10287171B2 (en) 2016-05-05 2019-05-14 Rec Silicon Inc Tumbling device for the separation of granular polysilicon and polysilicon powder
DE102017203812A1 (de) 2017-03-08 2018-09-13 Thyssenkrupp Ag Sichteinrichtung und Verfahren zum Sichten eines Materialstroms
CN109513530A (zh) * 2018-11-22 2019-03-26 海城市军刚中档镁砂有限公司 一种电熔镁砂干燥方法及装置

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Publication number Priority date Publication date Assignee Title
DE102014015161A1 (de) * 2014-10-14 2016-04-14 Khd Humboldt Wedag Gmbh Anlage zum Mahlen und Sichten von Zementklinker

Also Published As

Publication number Publication date
US5158182A (en) 1992-10-27
EP0460490A2 (fr) 1991-12-11
DE59103263D1 (de) 1994-11-24
DE4112018A1 (de) 1991-12-12
EP0460490A3 (en) 1992-01-15
JPH05245442A (ja) 1993-09-24

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