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EP0791407A2 - Séparateur pneumatique - Google Patents

Séparateur pneumatique Download PDF

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Publication number
EP0791407A2
EP0791407A2 EP96120523A EP96120523A EP0791407A2 EP 0791407 A2 EP0791407 A2 EP 0791407A2 EP 96120523 A EP96120523 A EP 96120523A EP 96120523 A EP96120523 A EP 96120523A EP 0791407 A2 EP0791407 A2 EP 0791407A2
Authority
EP
European Patent Office
Prior art keywords
classifier
rotor
classifying
air
space
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.)
Withdrawn
Application number
EP96120523A
Other languages
German (de)
English (en)
Other versions
EP0791407A3 (fr
Inventor
Otto Dipl.-Ing. Heinemann
Ingo Dipl.-Ing. Krupp Polysius Pacific Engeln
Hubert Dipl.-Ing. Eickholt
Ludger Ing.(Grad.) Lohnherr
Michael Dr.-Ing. Von Seebach
Ludger Dipl.-Ing. Schulte
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 EP0791407A2 publication Critical patent/EP0791407A2/fr
Publication of EP0791407A3 publication Critical patent/EP0791407A3/fr
Withdrawn legal-status Critical Current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 a classifier according to the preamble of claim 1.
  • a classifier of the required type is known from DE-C-36 22 413 and is used as a high-performance classifier or high-performance wind classifier in grinding plants in order to remove the comminution product coming from a mill, for example cement materials or the like, into fines and coarse material to be removed as finished goods ( Grain) to separate, which is generally further crushed.
  • This known sifter is primarily designed so that it has a high selectivity.
  • a design is selected in which the vertical-axis classifier rotor is arranged centrally in the classifier housing and has an essentially cylindrical shape (around the rotor axis), this classifier rotor being concentrically surrounded by a likewise essentially cylindrical, stationary guide vane ring with a radial spacing such that Between the rotor blades of the classifying rotor and the guide vane ring, a visual space in the form of a ring cylinder is formed. Furthermore, the inlet spiral for supplying the viewing air is divided by partition walls into at least two, preferably three, superimposed supply channels, in each of which adjusting elements are provided. In this way it should be possible to adapt the quantity and / or speed of the visible air flowing into the individual feed channels of the entry spiral to the material load in the various height areas of the viewing area in the sense of the desired high selectivity.
  • a classifier is known from DE-A-29 47 310, the upper housing section of which is cylindrical and without a visible air inlet spiral.
  • a classifying fan wheel with a vertical axis of rotation which operates in the sense of a classifying rotor, is arranged centrally in this upper housing section and can have the shape of an inverted cone or another shape.
  • a sort of guide vane ring is arranged around this fan wheel with a radial spacing, so that a visual space is again formed between the guide vane ring and the fan wheel. Classification with a high degree of efficiency is also sought here, and above all a complete separation of coarse and fine particles in the case of agglomerate formation or the like is sought.
  • sifting air is fed into the interior of the classifier via several gas chambers, these gas chambers being arranged distributed over the height of the classifier housing, of which only the uppermost gas chamber surrounds the actual classroom between classifier rotor and guide vane ring, while the other gas chambers in the area below of this actual visual space lead into the interior of the classifier housing.
  • these gas chambers being arranged distributed over the height of the classifier housing, of which only the uppermost gas chamber surrounds the actual classroom between classifier rotor and guide vane ring, while the other gas chambers in the area below of this actual visual space lead into the interior of the classifier housing.
  • the invention is based on the object of developing a classifier of the type required in the preamble of claim 1 in such a way that, while maintaining a high separation efficiency between coarse and fine material, it allows the production of a finished product which has broad limits in its grain size distribution is adjustable and in particular also enables a sufficiently wide or flat grain size distribution.
  • the classifier rotor has a conical shape which tapers downwards with rotor blades running diagonally downwards and inwards.
  • the classifying air inlet spiral is divided into at least two superimposed supply channels in order to be able to supply the classifying air in a targeted and adapted manner at least in adjustable quantities to the different heights or height ranges of the classifying area, the possibility of supplying the classifying material is also retained here to classify very effectively.
  • the classifying rotor which tapers conically downwards now generates a correspondingly greater circumferential speed in its upper region due to the larger diameter present there, which in turn leads to a correspondingly large turbulence in this height region of the visible space and to a small separating grain size.
  • the classifying rotor therefore has higher peripheral speeds, with - preferably adjustable - relatively high quantities of classifying air in order to achieve a relatively small separating grain size.
  • this classifier according to the invention is particularly noticeable when it is connected in the closed grinding circuit with a well-known good-bed roller mill in order to crush cement clinker and aggregates, the fine material to be removed from the classifier then containing a cement accordingly wider or flatter Grain size distribution forms.
  • a well-known good-bed roller mill in order to crush cement clinker and aggregates
  • the fine material to be removed from the classifier then containing a cement accordingly wider or flatter Grain size distribution forms.
  • other materials can also be comminuted and sifted in a similar manner, it also being possible to use a different mill, for example a conventional roller or roller mill, for comminuting the material to be fed to the classifier.
  • the classifier according to the invention will first be explained with reference to a first embodiment, which can be seen primarily from FIG. 1, but also largely from FIG.
  • This classifier contains a vertical-axis classifier housing 1, which has an inlet spiral 2 in its upper region for the supply of classifying air.
  • This entry spiral 2 opens tangentially into an annular visual space 3 formed within the classifier housing 1.
  • this entry spiral 2 is divided by horizontal dividing walls 4 in this example (FIG. 1) into four superimposed viewing air supply channels 5, 6, 7, 8, which in the present case have essentially the same height dimensions.
  • two adjusting devices designed as adjustable flaps 9 for adjusting the amount of air supplied to the individual supply channels 5, 6, 7, 8 are installed in the entry area of the entry spiral.
  • the actuation of the flaps 9 arranged in pairs can take place via corresponding outer adjusting levers 10, specifically the flaps 9 assigned to the individual feed channels 5, 6, 7, 8 can be adjusted independently of one another.
  • a desired, adjustable amount of visible air can thus be supplied to the different height ranges of the visual space 3.
  • the classifier housing 1 also has at its lower end a coarse material discharge funnel 11 with a coarse material outlet opening 11a and at least one pipe connection 12 which is used to discharge the fine material Visual air is used and in this case (see Fig. 1) is connected to the upper cover wall 1a of the housing 1.
  • An approximately basket-shaped sifter rotor 13 is arranged centrally in the sifter housing 1 and can be rotated about a vertical axis 14 and is driven via a shaft 15 by a drive device (not illustrated in more detail) arranged on the sifter housing 1.
  • This rotor 13 is equipped on its circumference with rotor blades 16, which are held on the rotor in a conventional manner and are preferably fixed, but if necessary, can also be attached to the classifying rotor 13 about their longitudinal axes 16a (FIG. 1) running from top to bottom.
  • the classifying rotor 13 has a conical shape that tapers from top to bottom (see FIG. 1) with rotor blades 16 that run obliquely downwards.
  • this rotor 13 can be constructed essentially in a conventional manner, its shaft 15 being expediently mounted at the lower end in a bearing 17 which is supported in an adjustable manner by radial struts 18.
  • the classifying rotor 13 is closed at its lower end by a bottom wall 13a, while at its upper end it is only partially covered by an annular plate 13b, so that it has a sufficiently large central through opening 19 on this upper side for discharging the fine air laden with fine material into the pipe connection 12.
  • the classifying rotor 13 is also surrounded concentrically by a guide vane ring 20 installed in the classifier housing 1 at a radial distance in such a way that the annular classifying space 3 is formed between this vane ring 20 and the rotor blades 16.
  • This guide vane ring 20 contains a plurality of guide vanes 21 which are arranged at equal distances from one another in the circumferential direction and which can preferably be adjusted together about their longitudinal axes 21a running from top to bottom relative to the viewing space 3 (by means known per se).
  • This guide vane ring 20 or its guide vanes 21 are thus provided at the outlet end of the classifying air inlet spiral 2. As shown in FIG.
  • the guide vanes 21 are inclined in the sense of the direction of flow of the viewing air flowing approximately tangentially into the viewing space 3.
  • This viewing space 3 also extends essentially over the same (vertical) height as the entry spiral 2, the guide vane ring 20 and the classifying rotor 13 or its rotor blades 16.
  • the guide vane ring 20 also has a conical shape which tapers downwards, the guide vanes 21 accordingly running or converging obliquely from top to bottom inwards.
  • the guide vane ring 20 tapers essentially at the same cone angle (with respect to the axis of rotation 14) as the classifying rotor 13. In this way, the viewing area 3 is also conical, with an essentially constant ring cross-section from top to bottom.
  • this classifier also contains suitable devices for feeding visual goods into the classroom 3.
  • These feed devices can be designed in any suitable and known manner.
  • at least one of the sifting air supply channels 5, 6, 7, 8, but preferably at least one of the uppermost supply channels (for example 5, 6) can at the same time also be used for supplying the sifting material via the entry spiral 2 into the Visual space 3 can be formed.
  • 1 - at least one product feed connection 22 can also be arranged, which opens out via the upper ring plate 13b of the classifying rotor 13, which acts at the same time as a material distributor plate, in such a way that the visible material or a Corresponding portion of visible material can be entered from above into the annular view space 3 evenly distributed over the circumference via this upper ring plate 13b, this evenly distributed entry being supported or improved by a deflection ring indicated by dash-dotted lines at 1b (FIG. 1) above the view space 3 can be.
  • the visible material which is preferably distributed predominantly or entirely into the upper end of the viewing space 3, is exposed to different eddies during its movement through this viewing space 3 in the different height ranges, which result from the different peripheral speeds of the classifying rotor 13 at its different height sections and can still be controlled by adjustable visible air quantities of the superimposed feed channels 5, 6, 7, 8, larger quantities of visible air being expediently supplied to the upper height regions of the visible space 3 than the lower height regions of the visible space 3.
  • adjustable visible air quantities of the superimposed feed channels 5, 6, 7, 8 larger quantities of visible air being expediently supplied to the upper height regions of the visible space 3 than the lower height regions of the visible space 3.
  • FIG. 4 A further exemplary embodiment of the classifier according to the invention is illustrated in FIG. 4, the guide vane ring in the left half of this FIG. 4 an embodiment variant with a conical guide vane ring (similar to that in FIG. 1) and a second embodiment variant in the right half of FIG shows with a substantially cylindrical vane ring with an otherwise identical overall design.
  • FIG. 4 Since many parts of the sifter example illustrated in FIG. 4 are similar in basic function and also partially in basic structure, as have been explained with reference to FIGS. 1 to 3, in this example FIG. 4 largely uses the same reference numbers with the addition of a dash for used approximately the same components, so that the following explanation of this embodiment can be limited essentially only to the real differences.
  • the classifier contains a classifier housing 1 'with a classifying air inlet spiral 2' which opens tangentially into the annular classifying chamber 3 'and is divided by two partition walls 4' into three superposed feed channels.
  • the formation of the entry spiral 2 ' can otherwise be designed in the same way, as illustrated and explained with reference to FIG. 2; The same also applies to the provision of adjustable flaps 9 for setting the amount of visible air supplied to the individual feed channels 5 ', 6', 7 '.
  • the classifying rotor 13 ' also has a conical shape which tapers from top to bottom with rotor blades 16' which run obliquely downwards and inwards.
  • the rotor 13 ' which can be rotated about a vertical axis 14' and driven by its shaft 15 ', is closed at its upper end by an upper cover plate 13'b, which at the same time acts as a good distributor plate and via which one of the visible goods Feeding-serving distributor bell 23 opens out concentrically, so that the fresh visible material is placed centrally on the cover plate 13'b of the rotor 13 'via this distributor bell 23 and is evenly distributed by the rotary movement of the rotor 13' and flung outward into the viewing space 3 'from above. can be entered.
  • the sifting rotor 13 ' On its lower end face 13'a, the sifting rotor 13 'has a sufficiently large, central through opening 19' through which the sifting air laden with fine material is guided centrally downward into a pipe connection 12 'arranged there, which in turn is connected via a plurality of pipes 24 to the outside the sifter housing 1 arranged fine material separator 25 is connected.
  • the classifier housing 1 ' also has a coarse material discharge funnel 11' at its lower end in this case.
  • the sifting rotor 13 ' is again concentrically surrounded at a radial distance by a guide vane ring arranged in a stationary manner in the sifter housing 1'.
  • the guide vane ring 20 '- in the same way as in the embodiment according to FIG. 1 - is also conical (tapering downwards), while the guide vane ring 20' 'in the right half of FIG. 4 essentially is cylindrical.
  • the visible space 3 'formed in the left embodiment of FIG. 4 - as described with reference to FIG. 1 - has a ring cross section that remains the same from top to bottom.
  • the visible space 3 ′′ formed between the rotor blades 16 ′ and the guide vane ring 20 ′′ has an annular cross-section which increases uniformly from top to bottom.
  • the left design variant in FIG. 4 offers the further advantage that the separating grain sizes can be set and varied even more precisely in the different height ranges of the viewing space 3 '; in the right variant in FIG. 4, on the other hand, the cylindrical guide vane ring 20 ′′ can be manufactured somewhat more simply.
  • a further difference of the exemplary embodiment illustrated in FIG. 4 can be seen in the fact that at least the upper feed channel 5 'of the classifying air inlet spiral 2' can have a larger clear cross section than the lower feed channels 6 ', 7'.
  • the individual classifying air supply channels 5 ', 6 ', 7' there is a further possibility of supplying larger amounts of visible air to the upper height areas of the viewing space 3 'than to the lower height areas.
  • all feed channels 5 ', 6', 7 ' are again each equipped with individually adjustable adjustment flaps 9 for adjustable air quantities in the same manner as described above with reference to FIGS. 2 and 3.
  • curve I solid line
  • curve II dashed line
  • the diagram according to FIG. 5 shows the individual sieve residues R determined in the sieve analyzes of the samples in% in the Oridnate, while the abscissa gives the grain size K in ⁇ m.
  • the two curves I and II plotted in the diagram of the two selected samples make it clear that the fines or finished goods sample taken from the conventional classifier had a steeper grain size distribution and thus a narrower grain size band than the finished goods sample taken from the classifier constructed according to the invention, which - according to curve II - A wider or flatter grain size distribution and thus a wider grain band in the finished product (cement) can be demonstrated.

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  • Combined Means For Separation Of Solids (AREA)
EP96120523A 1996-02-22 1996-12-19 Séparateur pneumatique Withdrawn EP0791407A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19606672 1996-02-22
DE19606672A DE19606672A1 (de) 1996-02-22 1996-02-22 Sichter

Publications (2)

Publication Number Publication Date
EP0791407A2 true EP0791407A2 (fr) 1997-08-27
EP0791407A3 EP0791407A3 (fr) 1997-12-29

Family

ID=7786149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120523A Withdrawn EP0791407A3 (fr) 1996-02-22 1996-12-19 Séparateur pneumatique

Country Status (3)

Country Link
US (1) US5791490A (fr)
EP (1) EP0791407A3 (fr)
DE (1) DE19606672A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101862730A (zh) * 2010-05-19 2010-10-20 吴耀明 旋流分级机

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959183A1 (de) * 1999-12-08 2001-06-13 Krupp Polysius Ag Windsichter
DE102011009741B4 (de) * 2010-07-30 2021-06-02 Hengst Se Zentrifugalabscheider mit Partikelleitrinne
CN102335655B (zh) * 2011-09-21 2014-06-11 林钧浩 物料分离吸排机
DE102013101517A1 (de) 2013-02-15 2014-08-21 Thyssenkrupp Resource Technologies Gmbh Sichter und Verfahren zum Betreiben eines Sichters
DE102015220269A1 (de) 2015-10-19 2017-04-20 Thyssenkrupp Ag Sichteinrichtung zum Sichten eines Materialstroms
DE102019200191A1 (de) 2018-06-08 2019-12-12 Sms Group Gmbh Trockenaufbereitung von Kaolin bei der Herstellung von HPA
CN108889438A (zh) * 2018-09-18 2018-11-27 苏州金洋环保科技有限公司 内循环垃圾分离系统
US11826786B2 (en) * 2019-11-22 2023-11-28 Gebr. Pfeiffer Se Classifier wheel with vane surface elements

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947310A1 (de) 1978-11-24 1980-05-29 Hosokawa Micron Kk Vorrichtung zur klassifizierung von partikeln
DE3622413C2 (de) 1986-07-03 1995-08-03 Krupp Polysius Ag Sichter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810922A (en) * 1928-05-28 1931-06-23 Centrifugal Separation Company Centrifugal separating apparatus
US3273325A (en) * 1963-01-09 1966-09-20 Universal Oil Prod Co Rotary gas separator
GB1114314A (en) * 1964-12-11 1968-05-22 Ass Portland Cement Improvements in or relating to centrifugal air classifiers
JPS55157364A (en) * 1979-05-28 1980-12-08 Hosokawa Micron Kk Classifier
US4296864A (en) * 1979-07-17 1981-10-27 Onoda Cement Co., Ltd. Air classifier
DE3533484A1 (de) * 1984-03-21 1987-03-26 Krupp Polysius Ag Umluftsichter
GB2176134A (en) * 1985-06-03 1986-12-17 Smidth & Co As F L Separator for sorting particulate material
DE3808023A1 (de) * 1988-03-10 1989-09-21 Krupp Polysius Ag Sichter
DE4137633A1 (de) * 1991-11-15 1993-05-19 Nied Roland Windsichter und verfahren zum betrieb eines windsichters
DE4402324A1 (de) * 1994-01-27 1995-08-03 Zementanlagen Und Maschinenbau Kreiselsichter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947310A1 (de) 1978-11-24 1980-05-29 Hosokawa Micron Kk Vorrichtung zur klassifizierung von partikeln
DE3622413C2 (de) 1986-07-03 1995-08-03 Krupp Polysius Ag Sichter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101862730A (zh) * 2010-05-19 2010-10-20 吴耀明 旋流分级机
CN101862730B (zh) * 2010-05-19 2012-04-04 吴耀明 旋流分级机

Also Published As

Publication number Publication date
EP0791407A3 (fr) 1997-12-29
DE19606672A1 (de) 1997-08-28
US5791490A (en) 1998-08-11

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