EP0792191A1 - Broyeur a rouleaux - Google Patents

Broyeur a rouleaux

Info

Publication number
EP0792191A1
EP0792191A1 EP95938404A EP95938404A EP0792191A1 EP 0792191 A1 EP0792191 A1 EP 0792191A1 EP 95938404 A EP95938404 A EP 95938404A EP 95938404 A EP95938404 A EP 95938404A EP 0792191 A1 EP0792191 A1 EP 0792191A1
Authority
EP
European Patent Office
Prior art keywords
grinding
rollers
accumulation
rolling mill
mill 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
EP95938404A
Other languages
German (de)
English (en)
Other versions
EP0792191B1 (fr
Inventor
Horst 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
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 EP0792191A1 publication Critical patent/EP0792191A1/fr
Application granted granted Critical
Publication of EP0792191B1 publication Critical patent/EP0792191B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
    • 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

Definitions

  • the invention relates to a roller mill according to the preamble of claim 1.
  • roller mills which are also referred to as airflow roller mills or roller bowl mills
  • a ground material flow of fresh material and coarse particles of a classifier which is generally integrated into the roller mill, is fed to the center of a grinding bowl and is centrifugal to the edge of the grinding bowl and to one the blade ring surrounding the grinding bowl is moved.
  • the centrifugal force acting on the regrind is particularly dependent on the diameter and the speed of the grinding bowl.
  • the throughput of a roller mill is largely determined by the available grinding surface, that is by the number and size of the grinding rollers used, and by the grinding speed. A sufficient supply of regrind to each roller is assumed.
  • an increase in speed could increase the throughput of a roller mill with the same, predetermined geometries and the same number of grinding rollers.
  • a smaller roller mill could be used, which is associated with less investment.
  • ATZBLA ⁇ RULE 26 Grinding bowl is partially emptied or emptied in the area between two successive grinding rollers, so that the grinding rollers are no longer supplied with regrind and the desired increase in throughput cannot be achieved.
  • a roller mill is known from DE 36 42 814 A1, which has a retaining device between two grinding rollers for controlling the movement of the grinding material in the region of the grinding path.
  • the retaining device is designed as an arcuate guide plate, which is attached to the housing of the roller mill via holding devices and is adjustable in height and inclination.
  • a roller mill described in DE-PS 1 507 579 has, compared to a material application and between two grinding rollers, a guide plate through which a sighting of the ground material moving in the direction of the bowl edge is to be achieved.
  • the shape and height of the guide plate bring about a splitting of the ground material and a separate discharge of the fine material flow and a retention of the coarse material on the grinding path.
  • the invention is based on the object of creating a roller mill with a low-wear and efficient retention device which provides an adequate supply of grinding material to the grinding rollers in both normal and
  • ERSATZBL ⁇ TT (REGEL26) secures even with an increased regrind speed, so that a higher throughput is guaranteed with less effort.
  • the invention is based on the consideration of arranging a retaining device with an extraordinarily low and significantly reduced friction between the grinding rollers of a roller mill compared to the known guide plates.
  • the roller mill has, as a retaining device between two grinding rollers, one or more accumulation rollers, which exert a jamming effect on the material to be ground moved outward on the grinding path of the grinding bowl.
  • This accumulation effect is caused by accumulation surfaces on the accumulation rollers, which are designed approximately diametrically to the movement of the regrind, so that the regrind between the grinding rollers cannot reach the edge of the bowl due to the centrifugal force, but is retained on the grinding bed and fed to further grinding.
  • a storage roller has a storage surface on an inner end face facing the longitudinal axis of the roller cooler.
  • One or more accumulation rollers are expediently arranged and dimensioned in such a way that their end faces form a rotating storage surface wall or a rotating weir to prevent the ground material from flowing off.
  • Rotating accumulation surface wall or a rotating weir is formed in that the individual rollers have their end faces almost adjoining one another and are arranged as close as possible to the adjacent grinding roller.
  • the accumulation rollers generally have no grinding action and are therefore generally not subjected to force or only to such an extent that they do not "jump". As a result, the friction is kept extremely low with a very good accumulation effect, which has an advantageous effect on the energy balance.
  • the accumulation roller does not require a defined additional force for its own weight, since grinding work should not be carried out by the accumulation roller.
  • a spring damping system can expediently be provided, with which the accumulation roller is held on the grinding bed.
  • a hold-down force for example by means of a spring damping system, jumping of the accumulation rollers can be avoided.
  • a particularly simple limitation device provides a lever with a stop, an adjusting screw or a buffer.
  • the accumulation rollers are arranged in such a way that their axes of rotation are at a lead angle or a caster! related to a radial arrangement.
  • ERSATZBLAH (REGEL26)
  • the accumulation rollers are arranged in such a way that their extended axes of rotation form an intersection with the axis of rotation of the grinding bowl or with the longitudinal axis of the roller mill form.
  • the accumulation rollers can be arranged in dependence on the mill geometry, the material to be ground and the desired throughput capacity in such a way that the storage surfaces of the inner end faces have a different radial distance and / or a different inclination to the axis of rotation of the grinding bowl or to the longitudinal axis of the roller mill and and / or the grinding rollers overlap.
  • the accumulation rollers are provided with more than one storage area.
  • the further stowage surfaces are formed on the inside of the stowage rings, the stowage rings projecting radially from the outer surface of a stowage roller.
  • the storage surfaces of the storage rings expediently form almost a right angle with the aid of the axis of rotation or the lateral surface of the storage roller.
  • a storage roller has, in addition to an inner storage area in the area of the inner face, at least on the outer face facing the housing wall of the roller mill, a storage ring which forms an outer weir or an outer storage area.
  • the baffle rings can expediently be applied subsequently to the baffle rollers.
  • a detachable arrangement enables the storage surfaces of the storage rings to be adapted to the respective requirements.
  • the storage rings are expediently made of a wear-resistant material and roll on the grinding bed with a lateral surface of a relatively small radial width.
  • the accumulation roller can also be driven in rotation to the grinding bowl.
  • a leveling or, in addition, smoothing and pre-compression of the grinding bed can be carried out from the lateral surface areas of the accumulation roller formed between the accumulation rings if the accumulation roller has a corresponding weight or is additionally subjected to force.
  • roller mill according to the invention with accumulation rollers as retention devices are an extremely effective retention of regrind between the milling rollers.
  • Advantageous loading of the sifting air stream with insufficiently ground material is avoided. This relieves the mill cycle and requires less work, what
  • ERSATZBLAH (REGEL26) leads to an improved energy balance. Since the accumulation rollers hold back the regrind extremely effectively, there is the possibility of increasing the speed of rotation of the grinding bowl and of increasing the throughput. Associated with this is the advantageous possibility of using smaller > investment-friendly mills. Additional armor as wear protection is not necessary, especially if the accumulation rollers only rest on the grinding bed with their own weight and roll along.
  • Fig. 1 is a plan view of a grinding bowl
  • Roller mill with grinding rollers and with accumulation rollers as retention devices
  • FIG. 2 shows a partially sectioned view of a roller mill in the region of a damming roller rolling on a grinding bowl
  • Fig. 3 is a view of an alternative embodiment of a storage roller according to Fig. 2 and
  • Fig. 4 is a view of a cylindrical accumulation roller.
  • the schematic representation acc. 1 shows a grinding bowl 2 which is set in rotation by a drive.
  • the regrind fed from above or from the side onto a grinding path 8 of the grinding bowl is comminuted between resiliently pressed grinding rollers 6 and the grinding path 8 of the grinding bowl 2.
  • the resilient pressing is usually carried out via a rocker arm and a hydraulic cylinder device (not shown) which interacts with it.
  • the grinding rollers 6 are usually driven solely by frictional engagement with the grinding bed 7 present on the grinding track and have no separate drive.
  • a fluid usually air
  • the fluid flowing in via the blade ring 4 conveys from the grinding path 8 after being rolled over by the grinding rollers 6 as a result of the centrifugal force, the ground material mixture of fine material and coarse grain thrown outwards into the area of a classifier (not shown).
  • Fine material is discharged from the airflow mill, while the coarse grain is fed to the center of the grinding bowl via a coarse material outlet, not shown.
  • the coarse grain comes together with fresh material onto the grinding track 8 and forms the grinding bed 7.
  • the coarse grain can also be at least partially removed from the classifier or the mill and fed in via feed devices after an external circuit in front of the grinding rollers 6.
  • retaining rollers 10 are arranged as retaining devices.
  • the accumulation rollers 10 rest on the grinding bed 7 solely due to their own weight and possibly due to a spring damping system.
  • the accumulation rollers 10 are not involved in the comminution of the ground material.
  • the jam rollers 10 primarily have the task of "sealing" the free space between the grinding rollers 6 in order to prevent insufficiently comminuted grinding material from being thrown off the grinding path 8 and loading the mill circuit.
  • FIG. 1 shows a first embodiment of the accumulation rollers 10, which only have a storage surface 12 on an inner end face 14.
  • REPLACEMENT SHEET (RULE 26) In the area of the inner end faces 14 form an almost dense storage surface wall 13 or a weir, by means of which the ground material is retained between the grinding rollers 6 and fed to the next grinding roller 6 on the grinding path 8. Only in the area of the grinding rollers 6 and thus after the comminution process can the ground material be moved in the direction of the blade ring 4 and be transported into the classifying chamber.
  • Fig. 1 shows that the accumulation rollers 10 are arranged with a lead or trailing angle in order to achieve an efficient accumulation effect for the regrind moving on a spiral path.
  • 2 shows a second, particularly effective storage roller 10 in a longitudinal section, the axis of rotation 20 of which, in extension, intersects the axis of rotation 3 of the roller bowl 2 at the level of the roller bowl 2.
  • the storage of the accumulation roller 10, which is not shown, can be carried out analogously to the storage of the grinding rollers 6. If several accumulation rollers 10 are arranged and each have a particularly low weight compared to the grinding rollers, there is also the possibility of attaching the accumulation rollers 10 to the housing.
  • 2 has a storage surface 12 on an inner end face 14 and a storage ring 17. This retaining ring 17 runs in the region of an outer end face 18 facing the housing wall 5 of the roller mill and, with a further storage surface 15, faces the axis of rotation 3 of the grinding bowl.
  • the accumulation roller 10 according to FIG. 2 has a truncated cone shape and, due to the two accumulation surfaces, namely the inner 12 and the external accumulation surface 15 formed on the accumulation ring 17, has a particularly good retention effect.
  • FIG. 3 A further, alternative accumulation roller 10 is shown in FIG. 3.
  • This conical storage roller 10 is formed with three storage rings 17. These can also be removably attached to the jacket surface 19 of the accumulation roller 10.
  • the too corresponding storage surfaces 15 extend radially outward from the lateral surface 19 of the accumulation roller 10 and are each arranged parallel to one another.
  • the accumulation surfaces 15 formed on the accumulation rings 17 run almost at right angles to the axis of rotation 20 of the accumulation roller 10, so that the ground material moved to the bowl edge 11 of the grinding bowl 2 is blocked and retained.
  • the gap distance between the grinding track 8 and the lateral surfaces 19 of the accumulation rollers 10 can advantageously be adjusted with the aid of a device (not shown) and can be measured in such a way that the lateral surfaces 19 contribute to leveling or compaction of the grinding bed.
  • the stowage rings 17 are made of a wear-resistant material.
  • the storage surfaces 15 of the storage rings 17 can be flat, concave or convex.
  • a cylindrical accumulation roller 10 of FIG. 4 has an axis of rotation 20 which runs parallel to the grinding track 8.
  • the accumulation roller 10 is provided with two accumulation rings 17, so that a total of three accumulation areas 12, 15 are formed together with a storage surface 12 on an inner end face 14. Even with a grinding bowl 2 rotating at high rotational speed, with an almost adjacent arrangement of accumulation rollers 10 and grinding rollers 6, efficient retention and grinding are ensured, so that an airflow roller mill equipped in this way has a high throughput capacity with a reduced energy requirement, has less wear on the restraint device and reduced maintenance outlay.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un broyeur à rouleaux comprenant une auge de broyage (2), des rouleaux broyeurs (6) entraînés en rotation sur cette auge, ainsi que des dispositifs de retenue (10) destinés à influer sur le déplacement du matériau broyé entre lesdits rouleaux. En vue d'accroître la capacité de production d'un broyeur à rouleaux tout en ayant des frais d'investissement avantageux, il est prévu des dispositifs de retenue (10) efficaces et résistant à l'usure entre les rouleaux broyeurs (6), chacun d'eux étant réalisé sous la forme d'une paroi de retenue rotative composée d'un ou de plusieurs rouleaux de retenue (10). Ces derniers présentent des surfaces de retenue (12, 15) qui empêchent le déplacement du matériau broyé vers l'extérieur, ce qui permet de le retenir en vue d'assurer un broyage complémentaire. Suivant une première forme d'exécution, une surface de retenue (12) est réalisée sur la face avant intérieure d'un rouleau de retenue. Selon une variante d'exécution, des bagues de retenue (17) en saillie radiale présentent des surfaces de retenue supplémentaires (15).
EP95938404A 1994-11-25 1995-11-03 Broyeur a rouleaux Expired - Lifetime EP0792191B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4442099 1994-11-25
DE4442099A DE4442099C2 (de) 1994-11-25 1994-11-25 Wälzmühle
PCT/EP1995/004327 WO1996016742A1 (fr) 1994-11-25 1995-11-03 Broyeur a rouleaux

Publications (2)

Publication Number Publication Date
EP0792191A1 true EP0792191A1 (fr) 1997-09-03
EP0792191B1 EP0792191B1 (fr) 1999-08-25

Family

ID=6534212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95938404A Expired - Lifetime EP0792191B1 (fr) 1994-11-25 1995-11-03 Broyeur a rouleaux

Country Status (16)

Country Link
US (1) US6113015A (fr)
EP (1) EP0792191B1 (fr)
JP (1) JP3668253B2 (fr)
KR (1) KR100402327B1 (fr)
CN (1) CN1103640C (fr)
AU (1) AU3980895A (fr)
BR (1) BR9510391A (fr)
CA (1) CA2205387C (fr)
DE (2) DE4442099C2 (fr)
DK (1) DK0792191T3 (fr)
ES (1) ES2137548T3 (fr)
MX (1) MX9703803A (fr)
MY (1) MY129616A (fr)
TW (1) TW292983B (fr)
WO (1) WO1996016742A1 (fr)
ZA (1) ZA959149B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806895C2 (de) * 1998-02-19 2002-10-24 Pfeiffer Ag Geb Verfahren und Vorrichtung zum Optimieren des Mahlbettes von Walzenschüsselmühlen
CN100336602C (zh) * 2004-06-23 2007-09-12 吴碧碧 单元式辊盘粉碎机
US7267293B2 (en) * 2005-05-13 2007-09-11 Alstom Technology Ltd High efficiency bowl mill
US7637446B2 (en) * 2007-08-29 2009-12-29 Flsmidth A/S Roller mill for grinding solid material
DE102009015037B4 (de) * 2009-03-26 2011-03-31 Loesche Gmbh Wälzmühle
DE102010010752A1 (de) 2010-03-09 2011-09-15 Loesche Gmbh Wälzmühle
JP5857629B2 (ja) * 2011-10-27 2016-02-10 株式会社Ihi バイオマスミル
DE102012106553B4 (de) * 2012-07-19 2014-05-22 Thyssenkrupp Resource Technologies Gmbh Zerkleinerung von Mahlgut in einer Vertikalrollenmühle
JP6728977B2 (ja) * 2016-05-26 2020-07-22 宇部興産機械株式会社 竪型粉砕機
US10646877B2 (en) * 2017-03-13 2020-05-12 General Electric Technology Gmbh System and method for adjusting a material bed depth in a pulverizer mill
JP7053358B2 (ja) * 2018-04-20 2022-04-12 株式会社ウェルディングアロイズ・ジャパン 竪型ミル
CN114473804B (zh) * 2021-12-31 2023-05-12 富联裕展科技(深圳)有限公司 表面加工装置
CN114643103B (zh) * 2022-04-02 2024-06-14 天津水泥工业设计研究院有限公司 一种立式辊磨挡料圈调整装置
CN116371532B (zh) * 2023-04-04 2024-01-12 山西御香园食品科技有限公司 一种半成品面粉处理设备及工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507579B1 (de) * 1966-05-20 1970-09-24 Loesche Kg Vorsichteinrichtung fuer Walzenmuehlen
DE3490332T1 (de) * 1983-06-30 1985-06-27 Kabushiki Kaisha Kobe Seiko Sho, Kobe Walzenmühle
DE3642814C2 (de) * 1986-12-15 1996-10-10 Pfeiffer Ag Geb Sperrvorrichtung
US4981269A (en) * 1988-11-18 1991-01-01 Ube Industries, Ltd. Vertical mill
DE3921986C1 (fr) * 1989-07-04 1990-10-25 Loesche Gmbh, 4000 Duesseldorf, De
US5244157A (en) * 1989-07-04 1993-09-14 Loesche Gmbh Air flow rolling mill
DE4123526A1 (de) * 1991-07-16 1993-01-21 Erbsloeh Geisenheim Ind Minera Verfahren und vorrichtung zur aktivierung von schichtmineralien
DE4202784C2 (de) * 1992-01-31 2002-08-08 Loesche Gmbh Luftstrom-Wälzmühle
DE4229488C1 (de) * 1992-09-04 1994-02-17 Vogel Franz Ingbuero Kollergang

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9616742A1 *

Also Published As

Publication number Publication date
DE59506696D1 (de) 1999-09-30
CN1166796A (zh) 1997-12-03
KR100402327B1 (ko) 2004-02-05
MX9703803A (es) 1997-08-30
DE4442099A1 (de) 1996-05-30
DE4442099C2 (de) 1997-08-14
JPH10510749A (ja) 1998-10-20
ZA959149B (en) 1996-06-19
JP3668253B2 (ja) 2005-07-06
ES2137548T3 (es) 1999-12-16
AU3980895A (en) 1996-06-19
BR9510391A (pt) 1999-04-06
CA2205387A1 (fr) 1996-06-06
WO1996016742A1 (fr) 1996-06-06
CA2205387C (fr) 2005-03-01
EP0792191B1 (fr) 1999-08-25
TW292983B (fr) 1996-12-11
US6113015A (en) 2000-09-05
MY129616A (en) 2007-04-30
CN1103640C (zh) 2003-03-26
DK0792191T3 (da) 2000-03-27

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