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EP0691159A1 - Séparateur pour broyeurs - Google Patents

Séparateur pour broyeurs Download PDF

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Publication number
EP0691159A1
EP0691159A1 EP95110410A EP95110410A EP0691159A1 EP 0691159 A1 EP0691159 A1 EP 0691159A1 EP 95110410 A EP95110410 A EP 95110410A EP 95110410 A EP95110410 A EP 95110410A EP 0691159 A1 EP0691159 A1 EP 0691159A1
Authority
EP
European Patent Office
Prior art keywords
mill
guide
guide vane
classifier
classifier according
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
EP95110410A
Other languages
German (de)
English (en)
Other versions
EP0691159B1 (fr
Inventor
Horst Dipl.-Ing. Brundiek
Michael Dipl.-Ing. Keyssner
Reinhard Dipl.-Ing. Koschorek
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.)
Loesche GmbH
Original Assignee
Loesche 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 Loesche GmbH filed Critical Loesche GmbH
Publication of EP0691159A1 publication Critical patent/EP0691159A1/fr
Application granted granted Critical
Publication of EP0691159B1 publication Critical patent/EP0691159B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a mill classifier, in particular a roller mill classifier, according to the preamble of claim 1.
  • Roller mill classifiers which can be arranged in an integrated manner in a roller mill or in a roller mill, for example in an airflow mill, or can be placed thereon, can be designed as static or dynamic classifiers.
  • Combinations of a static and a dynamic classifier are also known, which are then also referred to as high-effect classifiers.
  • a high-effect classifier for a roller mill is known under the name blind centrifugal classifier.
  • a dynamic classifier a gyro or ledge rotor classifier is arranged, which is surrounded by concentric, inter-conical cones of different diameters to form a visible space.
  • a first visual effect is achieved by a coaxial swirl flow of the fluid stream emerging from the blade ring on the circumference of the grinding table, which causes a first coarse material separation in an edge zone.
  • An advantageous second visual effect is achieved by the Venetian blind cones in that the fluid-regrind mixture flowing upward is subjected to flow deflections with upward and downward flow and then to a radial flow, as a result of which a second proportion of coarse material is excreted.
  • Venetian blind centrifugal sifters show relatively little wear during operation and also lower pressure loss.
  • the rigid design of the blinds opposes an optimization of the process parameters by the static guide apparatus and that an adaptation and optimization only in the area of the dynamic screening, for example with the help of the rotor speed.
  • the object of the invention is to create a highly effective mill classifier, in particular a roller mill classifier, which, with a particularly simple construction, enables extraordinarily high flexibility and optimization of the vision processes.
  • the invention is based on the consideration of creating a mill classifier in which the advantages of a high-effect blind classifier are retained and the efficiency of which is considerably improved by surprisingly simple measures.
  • a ledge rotor or basket sifter is arranged as a dynamic sifter, and a plurality of ring-shaped guide vane rings, at least one lower and one upper guide vane ring, are provided as a static guide apparatus, concentric with the dynamic classifier and with the formation of an annular classifying space.
  • the invention is in an area adjacent to the upper guide vane ring a deflection device is provided for the classifying ceiling, which directed deflection of the fluid regrind flow and a downward flow or movement in the viewing space.
  • the deflection takes place at an angle of greater than 90 ° up to almost 180 °, wherein an acceleration of the particle stream, and a speed increase is achieved in the tangential flow through a defined formation of the deflection device with arrangement of the plurality of guide blade rings.
  • the possibility of adjusting the guide vane rings which in particular have the same dimensions and are arranged axially one above the other, is particularly advantageous in such a way that the flow cross section of a guide vane ring is partially or completely closed.
  • a blocking of the flow cross section can be achieved by a tangential adjustment of the vertical guide vane rings. For example, by completely closing the lower guide vane ring, the radial speed in the upper guide vane ring can be increased accordingly, as a result of which changed visual effects and separation limits are achieved.
  • a substantial increase of the visual effect and an additional increase in efficiency is o possible by a deflection by about 180 by a downdraft effect is achieved in the downward flow with gravity in the viewing room. With such a deflection of up to approximately 180 ° , the particle downward flow is given not only the kinetic energy but also the gravitational acceleration "g" as a further increased speed component.
  • the static pre-screening carried out in the static guide apparatus in the invention arises not only from the channel action of the guide vane ring and also not only from the increase in the speed component of the particles by the deflection of more than 120 o , but there is also an increase in the speed of the particles due to the acceleration of gravity acting in the downward flow.
  • a static guide device constructed in accordance with the invention causes the formation of a "vertebral sink" in the annular space between the guide vane ring as a static view device and the ledge rotor as a dynamic view device.
  • a vertebral depression which can also be referred to as a cyclone flow
  • coarse particles are flung out beyond the known extent and thus kept away from the inguinal rotor.
  • the ingot rotor is therefore fed a particle mixture that has already been freed from a very high proportion of coarse grain.
  • the visual quality of the inguinal rotor improves considerably due to the lower percentage of rough products.
  • a combination effect is therefore achieved which also uses the acceleration forces in the downward flow due to the gravitational attraction acting on the particles.
  • the arrangement of a static guide apparatus consisting of a plurality of guide vane rings arranged one above the other also enables the separation limit to be changed via the height of the static classifier.
  • This option can also be used, among other things, to set a coarser separation limit in the area of the upper guide vane ring than in the area of the lower guide vane ring, which means that the coarse material is rechecked.
  • the constructive design of the several guide vane rings arranged one above the other provides for mutually aligned and coaxially arranged fastening axes of the guide vanes arranged one above the other, which are fastened in particular in the region of the deflection device to the classifier ceiling.
  • the guide vane rings and / or the guide vanes can be adjusted individually or simultaneously with respect to their radial alignment with the aid of adjusting levers and / or switching rings which are expediently to be actuated from the outside.
  • the possibility of adjusting the guide vane rings is not only directed at the tangential orientation for partial or complete blocking of the flow cross section of a guide vane ring, but also includes a horizontal or radial adjustment of the guide vane rings to change the distance between them this static vision system or guide and the dynamic classifier. This allows the grain distribution of the finished goods to be influenced in a targeted manner.
  • an edge region of the classifying ceiling as a deflection device and to provide it with a circumferential curvature with defined angles of inclination. It is sensible for the curvature to be concave in cross section, semicircular or even as an isosceles trapezoid. An outside inflow angle and an inside deflection angle are provided as the inclination angle, which are of the same design with a preferred central arrangement of the fastening axes of the guide vane rings. In this way, a gentle deflection of the regrind fluid flow is achieved, in which there is no abrupt braking and an accumulation of particles is largely avoided.
  • a significant visual effect is achieved in the visual space by a downflow effect in the downward flow, in which gravity can act.
  • the deflection device or the curvature be formed in the classifier ceiling on the edge above the classifier rotor.
  • the curvature preferably has a height of approximately half the height of a guide vane ring, the guide vane rings also essentially being arranged above the classifying rotor.
  • the upper guide wing ring with a hollow axis and the guide wing rings arranged below it with hollow or Solid axes, which are guided in the respective upper hollow axis, are fastened to the classifying ceiling, preferably in the center of the curvature of the deflection device.
  • a conically tapering intermediate wall is arranged below the guide vane rings, which delimits the viewing area in the area of the ledge rotor and ends in a semolina discharge in the center of the grinding rollers.
  • the roller mill classifier 1 is placed on a roller mill, of which, in addition to two grinding rollers 17, a rotating grinding bowl 20 and a blade ring 21 surrounding the grinding bowl 20, a mill housing 19 is shown as a cutout.
  • the roller mill sifter 1 has a conical sifter housing 2 and a sifter cover 3, in the area of which the fine material discharge opening 24 is arranged.
  • the feed material to be ground is fed to the grinding bowl 20 via an axially arranged downpipe 22.
  • a conical semolina discharge opening 18 extends into the area of the grinding rollers 17 and merges into an intermediate wall 16 which extends up to guide vane rings 7, 8 of a static guide device 6.
  • An annular visual space 5 is formed by the intermediate wall 16 and a ledge rotor 10, into which the fluid regrind stream 4 (shown only in the left area) arrives after a gentle deflection in the area of a deflection device 9.
  • the fluid regrind stream 4 is exposed to the action of gravity in a downward flow.
  • the fluid regrind flow 4 to be sifted is formed in a swirl flow rising from the blade ring 21, which rises in the area of the inner wall of the mill housing 19 or the sifter housing 2, in a partition formed by the intermediate wall 16 and the sifter housing 2 conically tapering space 26 to the deflection device 9 in the area of the classifying ceiling 3.
  • this deflection device 9 is designed as a curvature 12 in an edge region of the classifying ceiling 3 and a static diffuser 6.
  • the curvature represents an isosceles trapezoid, the base of which is open towards the viewing space 5 and the intermediate space 26.
  • the static guide device 6, which consists of a lower guide vane ring 7 and an upper guide vane ring 8 arranged axially above it, is fastened, so that a functional interaction of the guide vane rings 7, 8 and the deflecting device 9 is ensured.
  • the curvature 12 of the deflection device 9 is located above the classifying rotor 10 and has defined angles of inclination in order to largely rule out the accumulation of particles of the fluid regrind flow 4.
  • the inclination angles which include an inflow angle on the outer edge side and an inner deflection angle, are identical.
  • the angle of attack and the angle of deflection in relation to a horizontal are each approximately 45 ° .
  • the guide vanes of the upper guide wing ring 8 are each attached via hollow axles 13 and below in a largely identical configuration, the guide vanes of the lower guide wing ring 7 via solid axles 14, which are guided in the upper hollow axle 13.
  • the individual angular settings of the two guide vane rings 7, 8 arranged one above the other, which allow a variety of setting variants, are advantageous. Due to the adjustment variants of the guide vane rings, the supplied fluid regrind flows can be forced to different deflection paths and thus exposed to different flow forces that are optimized by the settings.
  • the pre-separation of coarse-grained fractions by sighting the swirl flow, in the region of the two guide vane rings 7, 8 of the static guide apparatus 6 and by the effect of gravity in the downward flow is particularly advantageous, as a result of which the supply of visible material in the dynamic ledge rotor 10 is reduced.
  • Another advantage is the particularly low wear, which is due to the relatively low flow speed of the particularly effective classifier.
  • the partial sectional view according to FIG. 2 shows a unit of the static guide device 6.
  • this guide device 6 has an upper guide wing 8 and a lower guide wing 7.
  • the adjustability of these guide vanes 7, 8 is from the outside, i.e. performed above the sifter ceiling 3.
  • an axle bearing 11 is provided in the ceiling 3.
  • the upper guide wing 8 is in this case arranged on a rotatable hollow shaft 13, which is fastened outside the classifying ceiling 3 with an adjusting device 33, which is designed in particular as a handle and can be fixed.
  • the lower guide vane 7, which is fixed rotationally rigidly with the axis 14, can be adjusted to the desired angle setting via this axis 14, which projects through the hollow axis 13 and the adjusting device 34, in particular a handle.
  • the guide vanes 7, 8 are therefore arranged one above the other and are not offset from one another in the circumferential direction, so that no separating ring between the two guide vanes is required. Even with different angular positions of the guide vanes of the guide vane rings 7, 8, therefore, only minimal, undesirable "false flows" occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)
  • Seasonings (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Eye Examination Apparatus (AREA)
EP95110410A 1994-07-06 1995-07-04 Séparateur pour broyeurs Expired - Lifetime EP0691159B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4423815 1994-07-06
DE4423815A DE4423815C2 (de) 1994-07-06 1994-07-06 Mühlensichter

Publications (2)

Publication Number Publication Date
EP0691159A1 true EP0691159A1 (fr) 1996-01-10
EP0691159B1 EP0691159B1 (fr) 1999-02-03

Family

ID=6522468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110410A Expired - Lifetime EP0691159B1 (fr) 1994-07-06 1995-07-04 Séparateur pour broyeurs

Country Status (13)

Country Link
US (1) US5622321A (fr)
EP (1) EP0691159B1 (fr)
JP (1) JPH0852433A (fr)
KR (1) KR960003823A (fr)
CN (1) CN1051943C (fr)
AT (1) ATE176406T1 (fr)
BR (1) BR9503098A (fr)
CA (1) CA2153221A1 (fr)
DE (2) DE4423815C2 (fr)
DK (1) DK0691159T3 (fr)
RU (1) RU2145522C1 (fr)
TW (1) TW316239B (fr)
ZA (1) ZA955386B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1053797A3 (fr) * 1999-05-19 2001-01-17 BBP Energy GmbH Séparateur centrifuge
WO2015082885A1 (fr) * 2013-12-02 2015-06-11 Milling Plant Solutions Limited Broyeur pulvérisateur
US9162256B2 (en) 2008-08-12 2015-10-20 Loesche Gmbh Method for classifying a ground material-fluid mixture and mill classifier
CN106622617A (zh) * 2017-02-27 2017-05-10 中国华电集团科学技术研究总院有限公司 双通道旋惯粗粉分离器

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US5899396A (en) * 1995-09-04 1999-05-04 Nied; Roland Air separator and single-rotor air separator mill with such an air separator
FR2741286B1 (fr) * 1995-11-21 1998-01-23 Fcb Separateur a air a action centrifuge
US5976224A (en) * 1998-05-04 1999-11-02 Durant; James F. Separating carbon from ash
DE19844113A1 (de) * 1998-09-25 2000-03-30 Loesche Gmbh Schaufelkranz für Luftstrom-Wälzmühlen
DE19961837A1 (de) 1999-12-21 2001-06-28 Loesche Gmbh Mühlensichter
US6820829B1 (en) * 2000-02-25 2004-11-23 Exportech Company, Inc. Method and apparatus for separating material
DE10050332C2 (de) * 2000-10-11 2003-11-27 Loesche Gmbh Verfahren und Vorrichtung zur Präparierung von Brennstoffen
DE10122644B4 (de) * 2001-05-10 2005-05-12 Loesche Gmbh Sichter
EP1295628A1 (fr) * 2001-09-19 2003-03-26 Niro Process Technology B.V. Colonne de lavage hydraulique et procédé de séparation de solides d' une suspension
RU2222382C2 (ru) * 2002-04-26 2004-01-27 Открытое акционерное общество "Сибирский теплотехнический научно-исследовательский институт ВТИ" Инерционный сепаратор пыли
JP4550486B2 (ja) * 2004-05-13 2010-09-22 バブコック日立株式会社 分級機およびそれを備えた竪型粉砕機、ならびにその竪型粉砕機を備えた石炭焚ボイラ装置
RU2297283C1 (ru) * 2005-09-27 2007-04-20 Научно-производственное республиканское унитарное предприятие "НПО "Центр" Установка для измельчения материалов
JP4785802B2 (ja) * 2007-07-31 2011-10-05 株式会社日清製粉グループ本社 粉体分級装置
AU2010264523B2 (en) * 2009-06-22 2016-01-28 The Babcock & Wilcox Company System for controlling coal flow in a coal pulverizer
JP5645468B2 (ja) * 2010-05-14 2014-12-24 三菱重工業株式会社 バイオマス粉砕装置及びバイオマス・石炭混焼システム
JP5645469B2 (ja) * 2010-05-14 2014-12-24 三菱重工業株式会社 バイオマス粉砕装置及びバイオマス・石炭混焼システム
US20110308437A1 (en) * 2010-06-18 2011-12-22 William Latta External pulverized coal classifier
JP5638318B2 (ja) * 2010-08-27 2014-12-10 三菱重工業株式会社 竪型ローラミル
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CN102784691A (zh) * 2011-05-15 2012-11-21 盐城吉达机械制造有限公司 一种开路终粉磨工艺
JP5854902B2 (ja) * 2012-03-21 2016-02-09 三菱日立パワーシステムズ株式会社 竪型粉砕機
JP5983214B2 (ja) * 2012-09-11 2016-08-31 株式会社Ihi 竪型ミル
JP6163728B2 (ja) * 2012-10-09 2017-07-19 株式会社Ihi バイオマスミル
EP2804696B1 (fr) * 2013-03-26 2016-08-31 Loesche GmbH Procédé et broyeur vertical pour le broyage de matière
CN103624003B (zh) * 2013-11-03 2015-10-14 宁波市鄞州青林医疗器械技术咨询有限公司 中药饮片离心送风式除屑机
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CN104001588B (zh) * 2014-06-20 2016-04-20 张嘉程 超细立式辊磨
JP6629605B2 (ja) * 2016-01-27 2020-01-15 三菱日立パワーシステムズ株式会社 分級機、粉砕分級装置及び微粉炭焚きボイラ
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CN115569710B (zh) * 2022-12-09 2023-02-17 济南老来寿生物集团股份有限公司 一种酸枣仁天麻五味子胶囊生产用研磨装置及研磨工艺
CN116060185B (zh) * 2023-04-06 2023-06-20 山东埃尔派粉体科技有限公司 一种可实现惯性自分流的气流分级筛选机
CN118649728B (zh) * 2024-08-16 2024-11-15 湖南天铭电力建设有限公司 一种火力发电厂磨煤机脱硫下料装置

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US3078651A (en) * 1958-12-12 1963-02-26 Babcock & Wilcox Ltd Apparatus for classifying airdust mixture
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1053797A3 (fr) * 1999-05-19 2001-01-17 BBP Energy GmbH Séparateur centrifuge
US9162256B2 (en) 2008-08-12 2015-10-20 Loesche Gmbh Method for classifying a ground material-fluid mixture and mill classifier
WO2015082885A1 (fr) * 2013-12-02 2015-06-11 Milling Plant Solutions Limited Broyeur pulvérisateur
CN106622617A (zh) * 2017-02-27 2017-05-10 中国华电集团科学技术研究总院有限公司 双通道旋惯粗粉分离器
CN106622617B (zh) * 2017-02-27 2018-08-07 中国华电集团科学技术研究总院有限公司 双通道旋惯粗粉分离器

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RU95111439A (ru) 1997-06-27
ZA955386B (en) 1996-02-09
DE4423815A1 (de) 1996-01-18
CA2153221A1 (fr) 1996-01-07
DE59505020D1 (de) 1999-03-18
RU2145522C1 (ru) 2000-02-20
TW316239B (fr) 1997-09-21
US5622321A (en) 1997-04-22
EP0691159B1 (fr) 1999-02-03
CN1051943C (zh) 2000-05-03
ATE176406T1 (de) 1999-02-15
JPH0852433A (ja) 1996-02-27
KR960003823A (ko) 1996-02-23
DK0691159T3 (da) 1999-09-20
CN1122263A (zh) 1996-05-15
DE4423815C2 (de) 1996-09-26
BR9503098A (pt) 1996-07-09

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