EP0676240B1 - Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung, insbesondere Luftstrommühle - Google Patents

Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung, insbesondere Luftstrommühle Download PDF

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Publication number
EP0676240B1
EP0676240B1 EP95104094A EP95104094A EP0676240B1 EP 0676240 B1 EP0676240 B1 EP 0676240B1 EP 95104094 A EP95104094 A EP 95104094A EP 95104094 A EP95104094 A EP 95104094A EP 0676240 B1 EP0676240 B1 EP 0676240B1
Authority
EP
European Patent Office
Prior art keywords
grinding
flow
segments
reinforcing cladding
cladding segments
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 - Lifetime
Application number
EP95104094A
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German (de)
English (en)
French (fr)
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EP0676240A1 (de
Inventor
Horst Dipl.-Ing. Brundiek
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
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Loesche GmbH
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Filing date
Publication date
Application filed by Loesche GmbH filed Critical Loesche GmbH
Publication of EP0676240A1 publication Critical patent/EP0676240A1/de
Application granted granted Critical
Publication of EP0676240B1 publication Critical patent/EP0676240B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface

Definitions

  • the invention relates to a method for comminuting Material of different grit according to the generic term of claim 1 and a device, in particular for Implementation of the method according to the preamble of the claim 6.
  • a shredding device known from DE-AS 1 152 297 with airflow mill is an annular space with a blade ring from a housing wall with a bead armor as wear protection and a grinding track with a retaining ring limited.
  • the outlet cross section of the flow channels and the radial width of the annular space are constant and by the fixed annular bead armor and the stationary storage ring specified.
  • a fluidic Influencing the flow is said to be interchangeable Buckets with a defined surface curvature be made possible.
  • Another airflow mill is a spring roller mill known and has an annular space, a baffle ring on the grinding ring and a bead-like one Baffle on.
  • To grind and fluid on the gaps To concentrate between the grinding rollers are deflection blades near the center of the grinding bowl and on the housing wall attached.
  • a cover ring and the baffle on the Housing wall cover an annular space up to Opening areas which radially adjoin the grinding rollers, from.
  • the regrind fluid flow is in the interior of the Grinding room and steered under the grinding rollers. Due to the high flow velocity and the redirections happen to swirling the overall flow, which is just like Inhomogeneities of the grinding bed adversely affect the energy balance and the effectiveness of this process and set up impact.
  • An airflow mill is known from DE-OS 23 09 900, whose bead armor consists of segments that can be put together. Each segment can be released with two screw elements attached and has two upper and lower, each different inclined trapezoidal surfaces as wear surfaces on. By a 180 degree repositioning around the longitudinal axis or the Vertical axis can have a non-worn surface and edge be exposed to the flow.
  • An implementation around the Longitudinal axis simultaneously causes a change, for example sharper redirection of the flow and in the granular particles flung into an annular space. The implementation is time consuming and with downtime connected, which lead to an increase in operating costs. If only for locally sharper deflection of the flow individual bead armor segments implemented and thus adjusted swirling of the fluid particle flows Pressure fluctuations in the grinding visible space and inhomogeneities lead in the area of the grinding bed, which affect the grinding performance.
  • the known methods and devices see an influence the grinding process with the help of a fluid flow in front of one at an appropriate speed predetermined direction, especially in the direction of grinding rollers or between the grinding rollers.
  • static means are used that are only after an interruption of the grinding process and through an expansion or conversion can be changed.
  • a roller mill has facilities for changing the Gap width in the area of the guide vanes and the inclination of the guide vanes.
  • the fluid flow of the Guide vane ring by a pivotable arrangement of a bulge-like device of the housing wall in the Mills are directed inside.
  • a generic device, especially for implementation a shredding process of material different Grain is described in EP 0 165 429 A1.
  • the known airflow mill has four over the circumference distributed air supply and adjustable nozzle ring segments on.
  • the nozzle ring segments consist of a inner, stationary wall part, each with two end faces arranged guide parts connected to the mill housing is.
  • An outer wall part of the nozzle ring segments is adjustable in the axial direction.
  • the invention has for its object to provide an efficient shredding process and a powerful device for shredding material of different grain size, which enable particularly effective flow dynamics in terms of optimal bed formation, high throughput and low energy consumption.
  • the task is procedurally characterized by the features of the claim 1 and device-wise by the features of the claim 6 solved.
  • a basic idea of the invention can be seen in with the help of a device, in particular for bead armor segments, which on the housing wall of an airflow mill are arranged adjustable, a regulation of the fluid flow and a dynamic, almost instantaneous Setting a new balance in the fluid flow with help in the grinding view room of an airflow mill a specifically designed flow envelope for targeted, predefinable training of a point of impact of the Flow envelopes on the housing wall and at least to take advantage of partial withdrawal of an external semolina stream.
  • the flow envelope surrounds the total flow and is preferred as a hyperboloid torus with a defined one Flow envelope formed.
  • a flow envelope in this context is the outer one, near the housing wall current boundary of the flow envelope, especially a hyperboloid torus, in a vertical axial section considered to understand.
  • the over the Edge of a grinding path thrown off regrind particles helical flow, preferably with ejector action on the Exit surface of the flow channels exposed.
  • a helical upward movement is due to the visual effect a flow envelope essentially outer semolina or marginal zone semolina formed.
  • a major advantage of the invention is that the flow envelope or the flow envelopes of the Hyperboloid torus with the help of adjustable and / or horizontally displaceable bead armor segments during grinding operations can be set.
  • the regulation of the fluid flow in particular by changing the projection surface while at the same time Influencing the flow tendency towards the mill center in the area of an annular space between the grinding table and housing wall is carried out according to the invention for a defined formation of the flow envelope used.
  • the free flow cross-section is used as the projection surface taking into account above the blade ring understood the position of the bulge segments.
  • the projection surface of the annular Partially, especially in dependence the number and type of rollers can be changed.
  • the beaded armor segments become horizontally displaceable arranged so that depending on the parameters and the desired shredding result Bead armor segment or several bead armor segments adjusted and thereby the flow envelope of the fluid flow can be changed.
  • the or the armor segments can be armor segments pivotable about a horizontal longitudinal axis or be arranged adjustable in inclination.
  • the bead armor segments can additionally or alternatively with themselves about their Provide circumferential expansion of continuously changing angles of inclination be.
  • Fluid delivery flow within a flow envelope can be set so that the flow gradient can be influenced in a targeted manner within the airflow mill is.
  • At least one Connection area of the bead armor segments in the direction of Longitudinal axis of the airflow mill shifted and / or this be adjusted so that from a partially narrower annular space a lesser but directional influenced fluid flow emerges.
  • the hyperboloid torus is then with an arcuate indentation on the circumference in Art fitted with a waist.
  • Two-roller mill two, opposing adjustment devices for adjustment of the adjacent bead segments utilized.
  • Airflow roller mill Because with a homogeneous grinding bed the efficiency of a Airflow roller mill can be improved is convenient provided one adjustment device each in front of each grinding roller, viewed in the unwinding direction, to arrange.
  • a device for shredding material which in particular for carrying out the method according to the invention is suitable, for example an airflow mill, which an annular space with a shovel ring for one Fluid flow between a rotating grinding bowl and a housing wall with adjustable bead armor segments has, the bead armor segments slidably arranged at least in the radial direction are according to the invention with at least one adjustment device, preferably corresponding to the number of grinding rollers Adjusting devices, equipped by outside and especially during a shredding process can be operated. These adjustment devices attack each of connection areas, which of at least two bulge segments are formed.
  • the connection areas consist of fasteners that can be detachably connected.
  • the bead armor segments designed as circular ring sectors connected to one another at their longitudinal end faces.
  • joints For a horizontal or radial shift in the direction to the mill axis it makes sense to use joints as connections to use which is a one-sided or reciprocal rectilinear Enable movement.
  • joints For example, a Axle or fork joint are used where the mounting flanges connected with a cylindrical bolt will.
  • the bead armor segments can also be pivoted or tilt adjustable in a horizontal Be stored longitudinal axis.
  • the arrangement and number of adjustment devices depends basically on the number and arrangement of the used Grinding rollers and, if necessary, the pre-compacting rollers.
  • Adjustment element designed like a bolt.
  • the adjustment element has a bolt shaft that in the area of Housing wall sleeve-like or via a sliding block guide is led.
  • Process engineering and economic advantages are given because the adjustment element is continuous and can be operated from the outside. Attachment to the Connection areas are made via recesses with bolts.
  • a shredding device with two grinding rollers looks in an advantageous way of training two to each Adjustments arranged at 180 degrees in front.
  • the segments are with bevels in the area of provided connecting elements arranged on the end face in order a radial displacement or swiveling inwards enable.
  • the bead armor segments which represent annulus sectors and possibly one along the circular arc have constantly changing inclination angles are to be realized an adjustment path or an adjustment distance arranged such that a horizontal displacement and / or an inclination adjustment or angular displacement two adjacent beadplate segments with almost sealed Bead armor ring is guaranteed.
  • Bead armor segments are suitable for horizontal displacement with a lower sliding surface that is essentially is formed horizontally and on one on the housing wall and approximately at the level of the exit surface of the blade ring arranged support surface rests.
  • An upper one runs parallel to the lower sliding surface Cover surface on which a cover element is arranged. This cover element prevents the accumulation of regrind particles in a dead area.
  • connection surface between the lower sliding surface and the top cover surface is exposed to wear Guide surface, which for this reason is almost double is as strong as the sliding and top surface.
  • the guide surface is as an inclined surface and radial directed inwards towards the grinding chamber axis.
  • the sloping surface can alternatively with a constant angle to form a circular area or with a continuous changing inclination angle are formed.
  • an adjustment element which one from the mill housing and a bolt shaft Has guide head for receiving a connecting bolt, in a connection area.
  • An adjustment causes consequently a change of position of the two adjacent ones Bead armor segments.
  • Bead armor segments alternating with radially displaceable To connect beaded armor segments.
  • Such an arrangement can also be used for inclinable bead segments be appropriate.
  • Adjustable or swiveling segments are similar to the horizontally movable segments educated. It makes sense to shorten the footprint and as a horizontal pivot axis for one to the mill axis directed inclination adjustment.
  • inventive method and the inventive Device can advantageously a crushing process, with the at least partially border zone size are carried out, regulated and optimized, because a fictitious point of impact of the Hyperboloid torus defined on the housing wall can be. In this way the flow resistance particularly low and maximum throughput can be achieved.
  • Fig. 1 shows a section of an airflow mill 4 in Area of a grinding bowl 6 as a device for comminution of material. Grinding rollers 7 roll on a grinding track 5 frictionally or are driven separately. That too shredding material of different grain sizes is almost placed in the middle of the grinding bowl 6. Between the Grinding bowl 6 and a housing wall 3 is an annular Space 8 formed in which a blade ring 12 is arranged is. The blades of the blade ring 12 are tangential and at an angle of attack ⁇ (angle to the horizontal) arranged and form an annular gas guide 14, the flow channels 15 of a flow 13 of a Give fluids an ejector effect.
  • ⁇ angle to the horizontal
  • a bead armor is made above the blade ring 12 Bead shell segments 10 arranged (see also Fig. 3 to 5, Fig. 13).
  • the bead armor segments 10 have a lower, horizontal sliding surface 28, an upper one, parallel to the sliding surface extending top surface 22 and one for annular Room 8 directed, inclined guide surface 34, the Inclination and / or swivel position in connection with the angle of attack ⁇ of the blades of the blade ring 12 a Defined fluid flow deflection and regulation enables.
  • FIG. 2 shows a top view of a grinding bowl 6 with two grinding rollers 7 and two smaller pre-compacting rollers 11 of the blade ring 12 and eight of the twelve required Bead shell segments 10 shown.
  • the Bead armor segments 10 are on their longitudinal end faces 25 connected to each other via connection areas 21.
  • the direction of rotation of the grinding bowl is by one Arrow 16, the rolling direction of the grinding rollers 7 through the Arrows 17 indicated.
  • An adjustment device 20 is for better overview e.g. between a grinding roller 7 and one Precompaction roller 11 arranged.
  • Adjustment of the bulge segments at 20 becomes corresponding the inventive method in one area made in the direction of rotation of the grinding bowl 6 (arrow 16) lies behind a grinding roller 7.
  • the adjustment is on the other hand at the connection area 20 'with a not shown Adjustment device 20 as a horizontal displacement the bulge segments have been performed.
  • the Projection area of the annular space 8, including the free flow cross section above the blade ring 12 taking into account the position of the bulge segments 10 is understood, is in this area, behind one Grinding roller 7 is much narrower than in the rest of the area.
  • two adjusting devices 20 are sufficient, which, viewed in the direction of rotation of the grinding bowl 6 (arrow 16), are to be arranged behind the grinding rollers 7.
  • the one at an adjustment Bead shell segments 10 involved can be in the described in connection with FIGS. 6 to 10, 13 and 14 Way to be attached.
  • the Sliding surface 28 is over at least one intermediate ring segment 27 attached to the housing wall 3.
  • Above the bead segments 10 are cover elements 33 lying at an angle provided, the regrind near the housing wall 3 after lead radially inside to the fluid flow.
  • connection area 21 with connecting elements 23, which formed on end faces 25 of the bead armor segments 10 are shown.
  • connection area 21 is in circular holes and a connecting bolt in an elongated hole introduced, which, if at this connection area 21 attacks an adjusting device 20, additionally a guide head 40 of an adjusting element 35 takes up (see Fig. 13,14).
  • the end faces 25 of the Connection areas 21 with almost complementary Bevels 29 and recesses 32 are provided 9 and 10.
  • FIG. 7 and Fig. 8 A horizontal shift and the effect of a gap distance 36 of a connection area 21 are shown in FIG. 7 and Fig. 8.
  • the bead armor segments 10 and through a spacing gap 36 becomes with an adjustment in the direction of the mill axis associated reduction in circumference is taken into account.
  • the history of the inner circular arc 38 of the bead armor segments 10 shows in the connection area 21 with a radial adjustment inside a largely continuous "constriction" of the Circular arc 38, which leads to a change in the grinding process of the fluid flow, especially in the area of Flow envelope of the fluid flow, leads.
  • Fig. 11 shows flow envelopes from which the influence of the angle of attack ⁇ of the blades of the blade ring 12 (see Fig. 1) and the angle of inclination ⁇ of the guide surface 34 emerges against a vertical (see FIG. 13).
  • the flow envelopes 45 show the spatial Structure of the arrangement and the expansion of the flow envelope in terms of vertical and horizontal or radial Expansion and put in a unilateral axial Vertical section through a hyperboloid flow envelope outer boundary, the distance from a housing wall 3 and a fictitious intersection with the housing wall 3 as a point of impact of a hyperboloid torus from marginal zone or external semolina.
  • the curves of the flow envelope 45 are different strongly curved.
  • the curves of the flow envelope 45 according to FIG. 11 illustrate the influence of a Adjustment of bead armor segments in connection with a helical flow of a fluid flow Defined blades of a blade ring 12 on the shape of the hyperboloid torus and thus on the flow resistance, the throughput and in particular also on the excretion of fringe zones in one "Dead area" between the housing wall 3 and the curve of the Flow envelope 45 exercises.
  • FIG 20 An adjusting device is shown in a schematic representation in FIG 20 shown, which at a connection area 21 engages with an adjusting element 35.
  • the adjustment element 35 (Fig. 14) has a bolt shaft 37 and one Guide head 40 on which to receive a connecting bolt 18 (Fig. 13) is provided with a bore. Of the Guide head 40 is inserted into the connection area 21 and fixed.
  • the bolt shaft 37 which is in the area the housing wall 3 by a sliding block Guide 41 is held, can be outside the housing wall be operated. The adjustment can be done manually, on mechanical, hydraulic or electromotive way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP95104094A 1994-04-08 1995-03-20 Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung, insbesondere Luftstrommühle Expired - Lifetime EP0676240B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4412197A DE4412197A1 (de) 1994-04-08 1994-04-08 Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung, insbesondere Luftstrommühle
DE4412197 1994-04-08

Publications (2)

Publication Number Publication Date
EP0676240A1 EP0676240A1 (de) 1995-10-11
EP0676240B1 true EP0676240B1 (de) 1998-09-09

Family

ID=6514963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104094A Expired - Lifetime EP0676240B1 (de) 1994-04-08 1995-03-20 Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung, insbesondere Luftstrommühle

Country Status (11)

Country Link
US (1) US5607111A (zh)
EP (1) EP0676240B1 (zh)
JP (1) JPH08196925A (zh)
CN (1) CN1049613C (zh)
AT (1) ATE170777T1 (zh)
BR (1) BR9501509A (zh)
CA (1) CA2146608A1 (zh)
DE (2) DE4412197A1 (zh)
DK (1) DK0676240T3 (zh)
TW (1) TW297784B (zh)
ZA (1) ZA952194B (zh)

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DE19844113A1 (de) * 1998-09-25 2000-03-30 Loesche Gmbh Schaufelkranz für Luftstrom-Wälzmühlen
CN1112259C (zh) * 1999-03-26 2003-06-25 李丛军 一种制粉复合方法及设备
CN100336602C (zh) * 2004-06-23 2007-09-12 吴碧碧 单元式辊盘粉碎机
DK176698B1 (da) * 2007-12-11 2009-03-09 Smidth As F L Valsemölle
DE102010010752A1 (de) * 2010-03-09 2011-09-15 Loesche Gmbh Wälzmühle
WO2011120568A1 (en) * 2010-03-31 2011-10-06 Magotteaux International S.A. Ring for grinding mill
WO2012154309A2 (en) 2011-03-24 2012-11-15 Babcock Power Services, Inc. Coal flow distribution controllers for coal pulverizers
CN102794214A (zh) * 2011-05-22 2012-11-28 成都建筑材料工业设计研究院有限公司 一种稳定料层提高微细颗粒粉磨功效的辊磨装置
CN102397806B (zh) * 2011-10-13 2015-08-26 郝志刚 立式磨机用物料分散装置
JP6176027B2 (ja) * 2013-09-26 2017-08-09 宇部興産機械株式会社 竪型粉砕機
CN103480460B (zh) * 2013-10-15 2015-08-12 南京西普水泥工程集团有限公司 一种磨机料层稳定装置
CN106111308A (zh) * 2016-08-20 2016-11-16 泰州市启航石油分析仪器有限公司 环保型超细煤粉研磨机
CN108940558A (zh) * 2018-01-30 2018-12-07 上海意丰机电科技开发有限公司 一种动、静风环
CN110280332B (zh) * 2019-07-03 2021-07-16 辽阳百乐保健品有限公司 基于高分子材料试验的多模块研磨装置
CN112220083B (zh) * 2020-09-26 2024-09-13 武汉谦屹达管理咨询有限公司 一种猪饲料高效加工方法
CN112536095A (zh) * 2020-12-07 2021-03-23 李秀莲 一种建筑垃圾破碎设备
CN112844784A (zh) * 2021-02-05 2021-05-28 广州物真五金有限公司 一种废弃建筑构筑物的粉碎机
CN114653452B (zh) * 2022-02-25 2023-10-17 吉林省福尔泰药业有限公司 一种药剂科西药研磨器

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Also Published As

Publication number Publication date
DE59503483D1 (de) 1998-10-15
DK0676240T3 (da) 1999-06-07
ZA952194B (en) 1996-02-12
EP0676240A1 (de) 1995-10-11
ATE170777T1 (de) 1998-09-15
CN1112857A (zh) 1995-12-06
DE4412197A1 (de) 1995-10-19
CA2146608A1 (en) 1995-10-09
CN1049613C (zh) 2000-02-23
BR9501509A (pt) 1995-11-07
JPH08196925A (ja) 1996-08-06
TW297784B (zh) 1997-02-11
US5607111A (en) 1997-03-04

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