EP0067895B1 - Séparateur centrifuge - Google Patents

Séparateur centrifuge Download PDF

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Publication number
EP0067895B1
EP0067895B1 EP19810104730 EP81104730A EP0067895B1 EP 0067895 B1 EP0067895 B1 EP 0067895B1 EP 19810104730 EP19810104730 EP 19810104730 EP 81104730 A EP81104730 A EP 81104730A EP 0067895 B1 EP0067895 B1 EP 0067895B1
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EP
European Patent Office
Prior art keywords
classifying
rotor
air
guide vanes
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.)
Expired
Application number
EP19810104730
Other languages
German (de)
English (en)
Other versions
EP0067895A1 (fr
Inventor
Ulrich Barthelmess
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.)
Omya GmbH
Original Assignee
Omya GmbH
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 Omya GmbH filed Critical Omya GmbH
Priority to EP19810104730 priority Critical patent/EP0067895B1/fr
Publication of EP0067895A1 publication Critical patent/EP0067895A1/fr
Application granted granted Critical
Publication of EP0067895B1 publication Critical patent/EP0067895B1/fr
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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
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06—Feeding or discharging arrangements
    • 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
    • B07B11/02—Arrangement of air or material conditioning accessories
    • 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
    • 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 centrifugal classifier according to the preamble of patent claim 1.
  • Such a classifier is used for classifying; H. for separating a mixture or batch of grains of different sizes and / or shapes and / or different specific weights in coarse material or coarse grain (grain size above a certain limit grain diameter) and in fine material (grain size below the limit grain size).
  • the grain mixture to be sifted is entered from above into the viewing area (annular space between the guide vane ring and the viewing rotor);
  • visible air flows from the outside through the guide vane ring into the visible space, so that the visible air describes a spiral movement: and entrains the particles in the corresponding movement paths.
  • the particles are exposed to the radially directed, opposing resistance and centrifugal forces. For a certain radial and axial air speed, there is a limit grain size for which the two forces are equal.
  • the coarser particles sooner or later reach the coarse grain outlet at the lower end of the viewing area.
  • the fine grain is entrained by the classifying air, which flows in through the channels of the classifying wheel and is sucked off by a fine material classifying air outlet which axially adjoins the interior of the classifying wheel.
  • the fine grain is finally separated or separated from the classifying air, whereupon the classifying air is re-introduced into the classifying air inlet, that is to say it can be circulated.
  • Such classifiers are primarily used to obtain fine material with the smallest possible grain size in a narrow grain size distribution; An upper grain size (limit grain size) of 2 to 4 ⁇ m is desired. This very fine grain is required in many ways, e.g. B. as a filler for plastics and car tires.
  • the coarse grain is used for other purposes or fine material is removed again after a further grinding process.
  • the invention is therefore based on the object of creating a classifier of this type with a higher fine material output, the fine material output being to be adjustable.
  • the “fine material output” is the proportion of the fine material which has been discharged, that is to say obtained, in the total of the fine material contained in the feed mixture.
  • the solution to this problem is that the classifier can be pivoted overall about a horizontal axis. In this way - depending on the inclination - the dwell time of the particle mixture in the viewing area can be adjusted according to the respective grain size and density and other influencing variables. If the dwell time is longer, a higher percentage of the fine material contained in the grain mixture is subtracted.
  • the classifying rotor is surrounded by a deflector ring at each of its two ends. These deflector rings make the flow more even and thus increase the selectivity.
  • Another training is that the individual guide vanes are displaceable in the radial direction for universal use of the classifier.
  • the guide vanes are guided in the radial direction at their two ends in the housing covers and are adjustable in the guides.
  • the radial depth of the viewing space can be optimally adjusted such that the separation zone is quite close to the outer diameter of the viewing rotor. This ensures that all fine grain gets into the area close to the rotor and is sucked in through the classifying air. If the separation zone is too far away from the classifying rotor, fine material together with the coarse material could get into the coarse material outlet.
  • the respective width or radial extent of the viewing space can hereby be optimally adapted to the respectively set inclination and thus to the dwell time.
  • the classifier according to the invention can be provided with only a single fine material class air outlet, but a special embodiment consists in that a fine material class air outlet connects to both end faces of the classifying rotor. As a result, the throughput is increased when the fine material output is increased.
  • the outlet cross-section is approximately doubled, so that despite the increased throughput there is a lower flow rate.
  • the fine material is thrown against the walls so violently that it adheres there, especially once a first fine material layer has built up. As a result, the flow conditions deteriorate continuously, which also results in a reduction in throughput.
  • a further embodiment consists in that a labyrinth seal is provided at each end of the classifying rotor, which is connected to one of the cooling chambers by a channel. This flushing prevents coarse material from entering the sighting air fine material outlets (or into the outlet).
  • a labyrinth seal in connection with an air classifier has already been described in DE-A-1757582.
  • the centrifugal force classifier has a concentric, essentially cylindrical housing 1 with a tangential sight air inlet 2, into which the sight air enters uniformly in the direction of the arrows 20 over the entire axial height.
  • a guide vane ring 9 is provided in the housing at a radial distance from the housing jacket. Again at a radial distance from the guide vane ring 9, the lamella ring 11 of the classifying rotor 10 is provided.
  • the grain mixture to be separated is entered from above into the viewing space 23 between the guide vane ring 9 and the rotor disk ring 11.
  • an annular channel 22 is provided in the upper housing wall for blowing in the grain mixture, into which a connecting piece 7 opens.
  • a funnel-shaped outlet 8 for coarse particles is provided on the opposite, that is to say the lower end of the housing.
  • an outlet 3, 4 is provided for the classifying air loaded with fine material in the form of a bent pipe section, the diameter of which corresponds approximately to the rotor inside diameter.
  • the centrifugal force classifier can be pivoted overall about a horizontal axis.
  • the pivot axis 30 extends transversely to the plane defined by the outlets 3, 4, approximately at the center between the outlets 3, 4.
  • the mounting of this pivot axis 30 can be carried out in a manner known per se.
  • the classifying air fine material outlets 3, 4 are each surrounded by a cooling chamber 17, 18, to which cooling air is supplied in each case via an exclusion 19, as a result of which fine material is prevented from being deposited in the outlets.
  • the rotor shaft 10a which is guided through the curved outlets 3, 4, is also supported on both sides in bearing brackets 5, 6.
  • the bearings are also cooled. Due to an overpressure in the cooling chambers 17, 18, no fine material can penetrate them (see arrows on the shaft bushings). It is driven by means of a V-belt pulley 12.
  • the classifying rotor 10 is opened on both end faces 13, 14 in such a way that it connects tightly to the outlets 3, 4. Between the classifying rotor and the housing there is in each case a seal 15, 16 which is designed like a face plate or a labyrinth.
  • a purge air channel 27 in each case introduces purge air from the cooling chambers 17, 18 for sealing between the viewing space 23 and the outlets 3, 4 (arrow 19 in FIG. 3).
  • Support disks 24 provided with radial passage openings are shrunk on the shaft 10a of the classifying rotor.
  • the rotor ends are each surrounded by a deflector ring 25, 26 on their outer circumference.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Claims (6)

1. Séparateur à air à force centrifuge comprenant un carter ou logement (1) sensiblement cylindrique, comportant une entrée d'air de séparation (2) sensiblement tangentielle, logement dans lequel sont montés une couronne fixe de palettes directrices (9), à une certaine distance radiale et concentriquement à l'enveloppe du logement, et à une certaine distance radiale vers l'intérieur de cette couronne un rotor de triage (10) comprenant une couronne de lamelles (11) formant des canalisations radiales, une entrée (20) destinée aux grains à séparer et débouchant par le haut dans l'enceinte de séparation prévue entre la couronne de palettes directrices (9) et le rotor de triage (10) et une sortie (8) destinée aux grains grossiers étant raccordée par le dessous à l'enceinte de séparation, et des sorties (3, 4) destinées à l'air de séparation chargé de produits fins se raccordant par leur côté frontal au rotor, sorties dont le diamètre correspond sensiblement au diamètre interne du rotor de triage (10), et la sortie d'air de séparation (2) et la couronne de palettes directrices (9) s'étendant sur sensiblement la même longueur axiale que le rotor de triage (10), caractérisé en ce que le séparateur à air peut pivoter dans son ensemble autour d'un axe horizontal.
2. Séparateur à air à force centrifuge selon la revendication 1, caractérisé en ce que le rotor (10) est entouré à ses deux extrémités frontales par un anneau déflecteur respectif (25, 26).
3. Séparateur à air à force centrifuge selon la revendication 1 ou 2, caractérisé en ce que la distance radiale séparant les palettes directrices de la couronne (9) et le rotor de triage (10) est réglable.
4. Séparateur à air à force centrifuge selon l'une des revendications 1 à 3, caractérisé en ce qu'une sortie d'air de séparation et de produits fins (3, 4) se raccorde à chacune des extrémités frontales du rotor de triage.
5. Séparateur à air à force centrifuge selon l'une des revendications 1 à 4, caractérisé en ce que la sortie d'air de séparation et de produits fins ou les deux sorties d'air de séparation et de produits fins (3, 4) est ou sont entourées dans la zone proche du rotor d'une chambre de refroidissement respective (17, 18).
6. Séparateur à air à force centrifuge selon la revendication 5, caractérisé en ce qu'il est prévu une garniture à labyrinthe respective aux extrémités frontales du rotor de triage, qui sont en liaison par une canalisation respective (27) avec chacune des chambres d'air de refroidissement (17, 18).
EP19810104730 1981-06-19 1981-06-19 Séparateur centrifuge Expired EP0067895B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19810104730 EP0067895B1 (fr) 1981-06-19 1981-06-19 Séparateur centrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19810104730 EP0067895B1 (fr) 1981-06-19 1981-06-19 Séparateur centrifuge

Publications (2)

Publication Number Publication Date
EP0067895A1 EP0067895A1 (fr) 1982-12-29
EP0067895B1 true EP0067895B1 (fr) 1985-01-30

Family

ID=8187778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810104730 Expired EP0067895B1 (fr) 1981-06-19 1981-06-19 Séparateur centrifuge

Country Status (1)

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EP (1) EP0067895B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621221A1 (de) * 1986-06-25 1988-01-14 Pfeiffer Fa Christian Verfahren zur windsichtung und windsichter
DE102016121925A1 (de) * 2016-11-15 2018-05-17 Neuman & Esser Gmbh Mahl- Und Sichtsysteme Sichter, Mühle und Verfahren zum Sichten eines Gas-Feststoff-Gemischs
CN109127169A (zh) * 2018-09-26 2019-01-04 天津水泥工业设计研究院有限公司 一种侧进风立式涡流选粉机、选粉方法及应用
CN109317405B (zh) * 2018-10-17 2024-02-23 浙江理工大学 一种离心式特优名茶分级机
CN111992502A (zh) * 2020-08-18 2020-11-27 李彩蓉 一种兼顾除杂和降尘功能的大米加工用稻谷筛选装置
CN115350917A (zh) * 2022-08-22 2022-11-18 铜陵浩凡农业科技有限公司 一种稻谷的分选设备及其分选方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229371B (de) * 1966-02-04 1966-11-24 Polysius Gmbh Windsichter
DE1607631A1 (de) * 1967-07-27 1970-10-22 Krupp Gmbh Windsichter
DE1757582C2 (de) * 1968-05-20 1976-03-11 The Georgia Marble Co., Atlanta, .Ga. (V.St.A.) Schleuderkorb-Windsichter
DE1918573A1 (de) * 1969-04-11 1970-10-15 Polysius Ag Verfahren und Vorrichtung zur Kuehlung des Sichtgutes eines Windsichters
DE2649382A1 (de) * 1976-10-29 1978-05-11 Alpine Ag Zentrifugalwindsichter
US4296864A (en) * 1979-07-17 1981-10-27 Onoda Cement Co., Ltd. Air classifier

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Publication number Publication date
EP0067895A1 (fr) 1982-12-29

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