EP0067895A1 - Séparateur centrifuge - Google Patents

Séparateur centrifuge Download PDF

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Publication number
EP0067895A1
EP0067895A1 EP19810104730 EP81104730A EP0067895A1 EP 0067895 A1 EP0067895 A1 EP 0067895A1 EP 19810104730 EP19810104730 EP 19810104730 EP 81104730 A EP81104730 A EP 81104730A EP 0067895 A1 EP0067895 A1 EP 0067895A1
Authority
EP
European Patent Office
Prior art keywords
rotor
classifying
air
classifier
fine material
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
EP19810104730
Other languages
German (de)
English (en)
Other versions
EP0067895B1 (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
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
    • 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 force 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 3zw. 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 (larger than boundary grain) get to the coarse grain outlet at the lower end of the viewing space sooner or later.
  • the fine grain is entrained by the classifying air which flows in through the channels of the classifying wheel and is sucked off by the fine material classifying air outlet by an axially connecting to the interior of the classifying wheel.
  • the fine grain is finally separated or separated from the classifying air, whereupon the classifying air is re-entered into the classifying air inlet, that is, 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 / um 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 that has been discharged, that is to say extracted, of the total fine material contained in the mixed material that has been fed in.
  • the solution to this problem is that the classifier can be pivoted overall about a horizontal axis. In this way - depending on the inclined position - 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 factors. 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 on both ends by a deflector ring. These bumpers 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 could get into the coarse material outlet together with the coarse material.
  • 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 increased Throughput performance results in a smaller 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.
  • such a setting of fine material is prevented in that the two fine material sight air outlets are each surrounded by a cooling chamber in the area near the rotor. Cooler particles adhere less easily to a cooled surface.
  • the bearings of the classifying rotor shaft mounted on both sides are advantageously arranged in one cooling chamber each; the bearings are cooled at the same time, which benefits operational safety and a long service life of the machine.
  • 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).
  • the classifier has a concentric, essentially cylindrical housing 1 with a tangential classifier air inlet 2, into which the classifier 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 9 of the lamellar ring 1 1 is of the classifying rotor 10. In the viewing space 23 between the vane ring 9 and the rotor lamella ring 11 is to be separated from above de grain batch entered. In fact, 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 coarse-grain outlet 8 is provided on the opposite, that is to say the lower end of the housing.
  • a fine material classifying air outlet 3, 4 is provided in the form of a curved tube piece, the diameter of which corresponds approximately to the rotor inside diameter.
  • the classifier can be pivoted overall about a horizontal axis.
  • the pivot axis 30 extends transversely to the plane determined by the outlets 3, 4, approximately at the center between the outlets 3, 4.
  • the position of this pivot axis 30 can be carried out in a manner known per se.
  • the sifting air fine material outlets 3, 4 are each surrounded by a cooling air chamber 17, 18, to which cooling air is supplied in each case via a connection 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 air chambers 17, 1 8, 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 open on both end faces 13, 14 so that it tightly connects the outlets 3 4. Between the Sighting rotor and the housing are each a seal 15, 16, which is designed like a disk or labyrinth.
  • a purge air duct 27 in each case introduces purge air from the cooling air chambers 1 7, 1 8 for sealing between the viewing space 23 and the outlets 3, 4 (arrow 1 9 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.
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 true EP0067895A1 (fr) 1982-12-29
EP0067895B1 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)

Country Link
EP (1) EP0067895B1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869786A (en) * 1986-06-25 1989-09-26 Christian Pfeiffer Air classifying process and air classifier
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
CN109317405A (zh) * 2018-10-17 2019-02-12 浙江理工大学 一种离心式特优名茶分级机
CN109952161A (zh) * 2016-11-15 2019-06-28 诺曼艾索工艺技术有限公司 筛分机、磨机及用于筛分气固混合物的方法
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

Citations (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
DE1918573A1 (de) * 1969-04-11 1970-10-15 Polysius Ag Verfahren und Vorrichtung zur Kuehlung des Sichtgutes eines Windsichters
DE1607631A1 (de) * 1967-07-27 1970-10-22 Krupp Gmbh Windsichter
DE1757582B1 (de) * 1968-05-20 1975-07-31 Georgia Marble Co Schleuderkorb-Windsichter
DE2649382A1 (de) * 1976-10-29 1978-05-11 Alpine Ag Zentrifugalwindsichter
EP0023320A1 (fr) * 1979-07-17 1981-02-04 Onoda Cement Company, Ltd. Séparateur sélectif d'air

Patent Citations (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
DE1757582B1 (de) * 1968-05-20 1975-07-31 Georgia Marble Co 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
EP0023320A1 (fr) * 1979-07-17 1981-02-04 Onoda Cement Company, Ltd. Séparateur sélectif d'air

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869786A (en) * 1986-06-25 1989-09-26 Christian Pfeiffer Air classifying process and air classifier
CN109952161A (zh) * 2016-11-15 2019-06-28 诺曼艾索工艺技术有限公司 筛分机、磨机及用于筛分气固混合物的方法
CN109952161B (zh) * 2016-11-15 2022-05-31 诺曼艾索工艺技术有限公司 筛分机、磨机及用于筛分气固混合物的方法
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
CN109317405A (zh) * 2018-10-17 2019-02-12 浙江理工大学 一种离心式特优名茶分级机
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

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Publication number Publication date
EP0067895B1 (fr) 1985-01-30

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