EP0004865A2 - Tamiseur pneumatique - Google Patents

Tamiseur pneumatique Download PDF

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Publication number
EP0004865A2
EP0004865A2 EP79100767A EP79100767A EP0004865A2 EP 0004865 A2 EP0004865 A2 EP 0004865A2 EP 79100767 A EP79100767 A EP 79100767A EP 79100767 A EP79100767 A EP 79100767A EP 0004865 A2 EP0004865 A2 EP 0004865A2
Authority
EP
European Patent Office
Prior art keywords
rotor
feed channels
material feed
classifier according
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.)
Granted
Application number
EP79100767A
Other languages
German (de)
English (en)
Other versions
EP0004865A3 (en
EP0004865B1 (fr
Inventor
Josef Prof. Dr.-Ing. Wessel
Manfred Müller
Otto Heinemann
Norbert Bredenhöller
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 EP0004865A2 publication Critical patent/EP0004865A2/fr
Publication of EP0004865A3 publication Critical patent/EP0004865A3/xx
Application granted granted Critical
Publication of EP0004865B1 publication Critical patent/EP0004865B1/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, comprising a rotor, which is fed centrally with visible material, with star-shaped visible material feed channels and with suction openings arranged between the visible material feed channels, further comprising at least one suction fan arranged in a fixed axial extension of the rotor and connected to the suction openings of the rotor , where sifting air flows through the space between adjacent sifting material feed channels essentially from the outside inwards and together with the fine material enters the suction housing through the suction openings of the rotor while the coarse material is flung outwards.
  • a wind sifter of the type mentioned above is described for example in DT-PS 2 225 258. Compared to other known designs, it is characterized above all by a significantly higher throughput with the same diameter and a relatively simple structural design.
  • the rotor essentially consists of two cover disks, between which a number of ribs are arranged in a star shape, which form the material feed channels.
  • One of the two cover disks is provided with openings in the area between adjacent visible material feed channels, which represent the suction openings of the rotor through which the fine air enters the stationary suction housing arranged under the rotor.
  • the space located between the outer end of the material feed channels and the suction openings mentioned is thus axially limited in the known embodiment by the one cover disk of the rotor.
  • Said outer ring area of the lower cover plate of the rotor according to DT-PS 2 225 258 is inevitably subject to a certain amount of wear during operation, both on its upper side that delimits the flow of visible material and on its underside, which together with the fixed wall of the suction housing opposite forms a sealing gap.
  • the invention is therefore based on the object to further develop the air classifier according to DT-PS 2 225 258 while maintaining its basic advantages in that the wear problems in the outer area of the rotor are reduced, the mentioned problem of adjusting the sealing gap between the rotor and suction housing is eliminated and finally the free flow cross-section for the sifting air is increased while the overall dimensions of the classifier remain the same.
  • the already existing wall of the suction housing thus replaces part of the rotor (namely the lower cover plate) of the rotor and, instead of this rotor part, takes over the function of axially limiting the flow path of classifying air and fine material to the side of the classifying housing until classifying air and fine material through the suction openings of the rotor can enter the suction housing.
  • the elimination of this wearing part considerably simplifies maintenance.
  • the air classifier illustrated schematically in FIGS. 1 to 3 in the elements essential for understanding the invention contains a central rotor 2 which is supplied with visible material from above via a feed tube 1 and a suction housing 3 which is arranged in an axially extended manner above the rotor.
  • the rotor 2 driven from below via a shaft 4, carries on a base plate 5 a number of visible material feed channels 7, 7a, 7b etc., which run in a star shape to the outside and whose axis 8 is in the outer area of the central visible material task (pipe 1) lying, imaginary circle 9 connects tangentially.
  • the feed channels 7, 7a, 7b etc. are inclined backwards in the direction of rotation of the rotor (arrow 10).
  • the visible material feed channels 7, 7a, 7b etc. are formed by hollow profile parts 11 which are closed on all sides (cf. FIG. 3).
  • the fixedly arranged suction housing 3 has on the side facing the rotor 2 in the outer region a flange 12 which covers the outer ring zone of the rotor 2.
  • the inner edge 13 of the suction housing 3 is indicated by dashed lines.
  • the space located between the outer end of the material feed channels 7, 7a, 7b etc. and the suction openings 9 between adjacent material feed channels is on the side facing the suction housing 3 by a stationary element, namely by the flange 12 of the suction housing limited.
  • the visible material feed channels 7, 7a, 7b etc. end close to the outer circumference of the base plate 5 of the rotor 2 or of the flange 12 of the suction housing 3.
  • the elongation of the visible material feed channels thus achieved results in a better resolution and acceleration of the material to be viewed, which enables the rotor speed to be reduced with the same visual effect.
  • an enlargement of the outer circumference of the suction openings 19 and thus an enlargement of the critical flow cross section for the classifying air are achieved in this way.
  • FIG. 4 shows a modified exemplary embodiment of a visible material feed channel 7 'which is formed by an approximately C-shaped hollow profile 20 which is open on one side.
  • the rotor moves in the direction of arrow 21; the open side of the hollow profile 20 thus hurries ahead in the direction of rotation of the rotor.
  • the material to be viewed is held and guided to the outside by the Coriolis force in the feed channel 7 'during its movement in the feed channel 7'.
  • Such an open design of the visible material feed channels is characterized by a high level of operational reliability (avoidance of any blockages) and particularly low wear.
  • FIG. 5 illustrates an embodiment of a rotor 2 ', the visible material feed channels 7 ", 7" a of which are curved and incline backwards in the direction of rotation (arrow 22) of the rotor. Furthermore, the boundary edge 23 of the material feed channels following in the direction of rotation of the rotor is offset radially inward in relation to the leading boundary edge 24. Due to the curved arrangement, the desired visual fineness can be achieved at a lower speed; one also achieves a maximum exit angle of the material with respect to the radius vector, which improves the efficiency of the sighting.
  • guide elements 25, 26 are also provided in the space located between the outer end of the visible material feed channels and the suction openings 9 ", which guide the inflowing visible air.
  • the inner edge of the suction housing 3 delimiting the suction openings 19" is 13 " designated.
  • FIG. 1 The suction housing 33 is here arranged the rotor 32.
  • This rotor 32 includes a central substantially S diffusing plate 34, a cone-shaped hood 35 and a number of star-shaped material to be separated extending task channels 37 extending, closed or open hollow profile by straight or curved portions are formed.
  • the suction openings 39 of the rotor lie along an imaginary conical surface, the tip of which points from the suction housing 33 to the rotor 32.
  • the suction openings 39 of the rotor lie along an imaginary conical surface, the tip of which points from the suction housing 33 to the rotor 32.
  • ß by the fact a particularly favorable distribution of air and a particularly smooth, non-turbulent inflow of the sifting air (arrows 40) results in the suction-extraction 33rd
  • the uniformity of the air flow improves the selectivity.
  • the inclination of the conical hood 35 corresponds to the inclination of the conical surface mentioned, along which the suction openings 39 are arranged; however, it is understood that the inclination of the cone-shaped hood 35 also. can be smaller; it is also possible to form the upper boundary surface of the rotor 32 by a flat disk lying perpendicular to the rotor axis. In this case, the cross section of the visible material feed channels widens from the inside to the outside.
  • the space between adjacent visible material feed channels between the outer end of the visible material feed channels 37 and the suction openings 39 is delimited by a flange 42 of the fixed suction housing 33. 6 can also be modified such that the lower edge of the material feed channels in the outer region and thus also the flange 42 run horizontally.
  • FIG. 7 shows an embodiment in which a suction housing 53 or 53a is arranged on both sides of the rotor 52.
  • the rotor 52 which is driven from below via a shaft 54, bears on a base plate 55, which also serves as a spreading plate, a number of star-shaped feed material channels 57, which, as in the exemplary embodiments explained above, run in a straight line or curved manner and can be formed by open or closed hollow profile parts.
  • the space between the outer end of the material feed channels 57 and the suction openings 59 and 59a is delimited on the top and bottom of the rotor by a flange 62 and 62a of the suction housing 53 and 53a.
  • the visual air (arrows 63) is extracted upwards and downwards
  • the hollow profile parts forming the visible material feed channels can be produced from extruded profile material. This is particularly expedient in the case of a straight line of the visible material feed channels (see FIG. 2), since in this case the visible material feed channels can be produced by simply cutting off strand material.
  • the profile parts forming the visible material feed channels can also be made of plastic, provided that sufficient temperature resistance and wear resistance are guaranteed.
  • plastic profile parts can be reinforced on the surfaces exposed to increased wear.
  • the profile parts which form the visible material feed channels can be made of highly wear-resistant material (such as ceramic Materials, melt basalt, etc.), preferably in the continuous casting process.
  • the correct choice of the ratio of the width of the material feed channels in the axial direction of the rotor (height H, see FIG. 3) to the rotor diameter (dimension D according to FIG. 1) is also important for an optimal function of the classifier.
  • the ratio H / D is expediently chosen between 1: 4 and 1:15, preferably between 1: 7 and 1:12.
  • the ratio H: D is expediently between 1: 2 and 1:10, preferably between 1: 3.5 and 1: 7.
  • Another modification of the invention is to slightly incline the outer mouth of the material feed channels with respect to the classifier axis, so that the edge of this mouth facing away from the suction opening lies on a somewhat smaller diameter than the mouth edge facing the suction opening. This achieves a compensation for the somewhat uneven flow velocity of the air at a greater duct height (slightly larger near the suction opening than on the side facing away from the suction opening), which leads to an increase in the selectivity.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Centrifugal Separators (AREA)
  • Cyclones (AREA)
EP79100767A 1978-04-22 1979-03-14 Tamiseur pneumatique Expired EP0004865B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2817725 1978-04-22
DE19782817725 DE2817725A1 (de) 1978-04-22 1978-04-22 Windsichter

Publications (3)

Publication Number Publication Date
EP0004865A2 true EP0004865A2 (fr) 1979-10-31
EP0004865A3 EP0004865A3 (en) 1979-11-28
EP0004865B1 EP0004865B1 (fr) 1983-02-23

Family

ID=6037761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100767A Expired EP0004865B1 (fr) 1978-04-22 1979-03-14 Tamiseur pneumatique

Country Status (5)

Country Link
US (1) US4236997A (fr)
EP (1) EP0004865B1 (fr)
JP (1) JPS54141457A (fr)
DE (1) DE2817725A1 (fr)
ES (1) ES8100617A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038909A1 (fr) * 1980-04-23 1981-11-04 Krupp Polysius Ag Séparateur pneumatique
EP0209663A1 (fr) * 1985-06-14 1987-01-28 Krupp Polysius Ag Procédé et installation pour le broyage fin des matériaux
EP0128392A3 (en) * 1983-06-03 1988-06-01 Tpt Tech Spa A separator device for the separation of the components of edible meals or the like
WO2018018155A1 (fr) 2016-07-29 2018-02-01 9754741 Canada Ltd. Procédé et appareil d'individualisation de particules dans un flux

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3044063A1 (de) * 1980-11-22 1982-07-15 Krupp Polysius Ag, 4720 Beckum Windsichter
JPS594477A (ja) * 1982-06-30 1984-01-11 日清製粉株式会社 粉体分級機
GB8415190D0 (en) * 1984-06-14 1984-07-18 Smidth & Co As F L Separator
JPS61262198A (ja) * 1985-05-16 1986-11-20 カシオ計算機株式会社 小型ｘ−ｙプロツタ
KR930002069B1 (ko) * 1986-04-11 1993-03-26 벨로이트 코포레이션 회전식 분리장치와 분리방법
DE3622413C2 (de) * 1986-07-03 1995-08-03 Krupp Polysius Ag Sichter
US6739456B2 (en) 2002-06-03 2004-05-25 University Of Florida Research Foundation, Inc. Apparatus and methods for separating particles
CN112337795B (zh) * 2020-03-11 2022-08-09 江门市辰源地毯科技有限公司 一种pvc聚合物生产调配的分料控制方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE195713C (fr) *
DE671594C (de) * 1937-06-04 1939-02-10 Kohlenscheidungs Ges M B H Vorrichtung zum Sichten eines in einem Gasstrom enthaltenen Gemisches
GB694219A (en) * 1948-10-01 1953-07-15 Alpine Ag Eisengiesserei Und M Improvements in centrifugal flow separators
FR1126481A (fr) * 1955-05-11 1956-11-23 Ultrafine De L Union Francaise Perfectionnement aux classificateurs de matières pulvérulentes
FR1126487A (fr) * 1955-05-12 1956-11-23 Jaeger Ets Ed Commutateur thermostatique
US2968401A (en) * 1956-09-05 1961-01-17 American Marietta Co Air classifier
US2943735A (en) * 1957-06-13 1960-07-05 Sharples Corp Particle classifiers
US3048271A (en) * 1960-02-24 1962-08-07 Sharples Corp Particle classification
US3891543A (en) * 1971-02-03 1975-06-24 Josef Wessel Centrifugal sifter apparatus
DE2551175A1 (de) * 1975-11-14 1977-05-26 Erich Beck Spiralwindsichter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038909A1 (fr) * 1980-04-23 1981-11-04 Krupp Polysius Ag Séparateur pneumatique
EP0128392A3 (en) * 1983-06-03 1988-06-01 Tpt Tech Spa A separator device for the separation of the components of edible meals or the like
EP0209663A1 (fr) * 1985-06-14 1987-01-28 Krupp Polysius Ag Procédé et installation pour le broyage fin des matériaux
WO2018018155A1 (fr) 2016-07-29 2018-02-01 9754741 Canada Ltd. Procédé et appareil d'individualisation de particules dans un flux
EP3490730A4 (fr) * 2016-07-29 2020-03-18 9754741 Canada Ltd. Procédé et appareil d'individualisation de particules dans un flux

Also Published As

Publication number Publication date
DE2817725A1 (de) 1979-11-08
EP0004865A3 (en) 1979-11-28
ES479796A0 (es) 1980-07-01
ES8100617A1 (es) 1980-07-01
US4236997A (en) 1980-12-02
JPS5728306B2 (fr) 1982-06-16
EP0004865B1 (fr) 1983-02-23
JPS54141457A (en) 1979-11-02

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