EP0353576A2 - Broyeur à impact - Google Patents

Broyeur à impact Download PDF

Info

Publication number
EP0353576A2
EP0353576A2 EP89113525A EP89113525A EP0353576A2 EP 0353576 A2 EP0353576 A2 EP 0353576A2 EP 89113525 A EP89113525 A EP 89113525A EP 89113525 A EP89113525 A EP 89113525A EP 0353576 A2 EP0353576 A2 EP 0353576A2
Authority
EP
European Patent Office
Prior art keywords
mill
beater
wheel
beaters
removal
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
EP89113525A
Other languages
German (de)
English (en)
Other versions
EP0353576A3 (en
EP0353576B1 (fr
Inventor
Edgar Hönges
Thomas Liesemeier
Walter Lohmüller
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT89113525T priority Critical patent/ATE86145T1/de
Publication of EP0353576A2 publication Critical patent/EP0353576A2/fr
Publication of EP0353576A3 publication Critical patent/EP0353576A3/de
Application granted granted Critical
Publication of EP0353576B1 publication Critical patent/EP0353576B1/fr
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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B02C2013/28618—Feeding means
    • B02C2013/28672—Feed chute arrangements

Definitions

  • the invention relates to a beater mill with a beater wheel mounted in a mill housing on a horizontal axis, the periphery of the beater wheel being equipped with a plurality of approximately radially oriented beaters and the beaters on the inner periphery of the mill housing being opposed by a grinding path formed by the product, and the mill housing being approximately mill door standing perpendicular to the horizontal axis.
  • a tower powder with a broad grain spectrum is produced.
  • the coarse fractions of the tower powder are sieved off as a flap. Since the chemical composition of the coarse fraction corresponds to that of normal powder, it makes sense to adapt the grain spectrum of the coarse fraction to that of the material flow by comminution.
  • This mill which is known as a so-called impact screen mill, consists in itself of a beater wheel with several beaters or baffle plates and a sieve basket surrounding this wheel, the beater wheel and sieve basket being able to rotate in opposite directions during operation.
  • the grinding process of these mills takes place primarily in the area between the grinding track and the peripheral edges of the beater wheel, the grinding track essentially lying just below the inner surface within the sieve basket.
  • the distance between the peripheral racket edges and the grinding track should be a certain minimum amount, e.g. B. 5 to 15 mm, do not fall below.
  • the peripheral edges of the club should of course not touch the grinding track, because then - due to the increased friction - the club wheel could even be blocked.
  • caking forms preferentially and first. Because of the progressively increasing friction between the grinding track, sieve basket and beater wheel, every movement of the sieve basket and / or beater wheel is blocked, often after a few hours of operation. To increase the service life of the grinder when grinding sticky products, you could therefore try the sieve basket entirely omitted to increase the distance between the periphery of the club wheel and the grinding track. Corresponding experiments carried out by the inventors showed a slightly increased service life of the mill, but after three days at the latest the caking on the inner surface of the grinding path of the mill housing had increased so that the beater wheel blocked and the mill had to be opened for cleaning.
  • the beater wheel of the impact or impact mill is basically equivalent to the rotor of a fan. It therefore conveys large amounts of air.
  • the mill was equipped with a relatively small beater wheel with the housing unchanged. As such, it would have been expected that the service life regarding the gluing and caking of the grinding chamber would be significantly increased until the beater wheel was blocked. In practice, however, the service life was not significantly longer than that of a larger diameter beater wheel.
  • the invention is based on the object, the service life, that is to say the trouble-free operating time, of an impact mill to increase the type mentioned when grinding heavily caking or sticking products, such as screened detergent flashover, preferably to at least about a month.
  • this object is achieved according to the invention in that the beaters are directly opposite the grinding path formed by the product and at least one beater in the function as a removal beater projects radially further outwards than the rest of the beaters.
  • the beater wheel itself forms its grinding path with the help of the removal beater and thereby keeps a defined area in the grinding chamber clear.
  • the grinding chamber is prevented from overgrowing and the beater wheel is consequently blocked.
  • this mass shift can be caused in any way, e.g. B. be balanced by additional masses on the stick wheel.
  • the balancing can take place without additional masses if the first clearing racket is diametrical opposite second clearing racket - also projecting in the radial direction - is provided.
  • three or more removal clubs can be arranged symmetrically distributed around the circumference of the racket wheel.
  • the grinding track provided on the inner circumference of the mill housing is formed by the clearing beater or cutters according to the invention and at the same time the grinding chamber between the circumference of the beater wheel and the grinding track is kept clear.
  • the grinding chamber can be kept particularly effective with regard to the power required for the scraper if the scraper beaters are toothed on their peripheral edge and if the teeth of the scraper rack teeth are offset against one another. If, for example, with two diametrically opposed removal beaters, each tooth of one removal beater falls into a gap in the other removal beater, the effort required to keep the grinding chamber free is particularly low, so that blockages cannot occur.
  • a cone integrated in the mill door is provided as the product feed to the beater wheel.
  • the cone which opens in the direction of the beater wheel, prevents the product inlet from baking, even if the product tends to stick.
  • the outside diameter of the cone on the side facing the beater wheel should be slightly smaller than the diameter of the beater wheel in order to avoid that from the grinding chamber provided on the periphery of the beater wheel, already ground product, which is still prone to caking, is pressed back into the insertion cone. For the same reason, the distance between the cone and the club wheel should be kept as small as possible without mutual friction.
  • Equipping the beater wheel with one or more radially projecting removal beaters is advantageous regardless of the difference in diameter between the beater wheel and the inner circumference of the mill housing. Even if, for example, to reduce the amount of air conveyed by the mill, a relatively small beater wheel is provided, it is essential for an economically satisfactory service life to equip this beater wheel according to the invention with at least one removal beater protruding in the radial direction, which removes the grinding path assigned to the beater wheel on the product that cakes itself on the inner circumference of the mill housing and that permanently keeps the grinding chamber clear. After a relatively short operating time, such a mill operates as if the diameter of the mill housing was reduced. The dimensions of the product feed must be adapted to the reduced beater wheel.
  • the beater wheel 3 has a plurality of beaters 4 which describe the circumference 6 of the beater wheel 3 defined during rotation with its peripheral edge.
  • two beaters in the function as clearing beater 9 are enlarged in the radial direction to such an extent that they reach the (provided) grinding track 1. If the grinding track 1 is therefore not formed directly by the material of the mill housing but by caking product, the peripheral edges 10 of the removal beaters 9 determine the grinding track 1.
  • the mill has a mill housing 11, within which a beater wheel 3 is rotatably mounted about an axis 2.
  • the beater wheel 3 is driven from outside via a shaft 12. It has a large number of clubs 4 and diametrically two clearing beaters 9 projecting over its circumference 6, which keep or define the grinding chamber 8 and thus the grinding track 1.
  • the removal racket 9 provided in the exemplary embodiment has a toothing 13 according to FIG. 2, the teeth 14 and gaps 15 of which are offset from one another such that a tooth 14 and a gap 15 always meet in the circumferential direction.
  • the section of FIG. 2 also shows a product feed, designated overall by 16, which is integrated in a mill door 17 and is designed as a cone 18 which is open towards the beater wheel 3.
  • the outer diameter d of the cone 18 on its side facing the beater wheel 3 should be slightly smaller than the diameter D of the beater wheel 3.
  • the distance a between the cone 18 and beater wheel 3 is kept as small as possible.
  • the choice of the relative sizes d / D and the smallest possible distance a prevent fresh material from the grinding chamber 8, which is still prone to caking, from being pressed back into the product feed 16 and from clogging the feed.
  • the regrind should normally be discharged in the radial direction, for example — as shown in FIG. 2 — through an outlet 19 provided on the underside in the direction of the arrow.
  • Fig. 4. shows an example of an application of the impact mill according to Fig. 1 to 3.
  • a tower powder with a broad grain spectrum and mixed with agglomerates, fragments and wall deposits is produced in the discharge of the dryer.
  • the coarse fractions of the tower powder are sieved off as a flap.
  • You get, for example, from the screen 20 5th G (G upper floor) of a drying tower into one Mill 21 according to the invention, which can be located, for example, in the 4th G of the drying tower.
  • the outlet of the mill 21 can be connected in the 3rd G to a line 23 which leads the ground product back to the tower discharge belt 25 located in the 2nd G of the drying tower.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)
  • Graft Or Block Polymers (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Food-Manufacturing Devices (AREA)
EP89113525A 1988-07-30 1989-07-22 Broyeur à impact Expired - Lifetime EP0353576B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89113525T ATE86145T1 (de) 1988-07-30 1989-07-22 Schlagmuehle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826039 1988-07-30
DE3826039A DE3826039A1 (de) 1988-07-30 1988-07-30 Schlagmuehle

Publications (3)

Publication Number Publication Date
EP0353576A2 true EP0353576A2 (fr) 1990-02-07
EP0353576A3 EP0353576A3 (en) 1990-10-10
EP0353576B1 EP0353576B1 (fr) 1993-03-03

Family

ID=6359975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113525A Expired - Lifetime EP0353576B1 (fr) 1988-07-30 1989-07-22 Broyeur à impact

Country Status (6)

Country Link
EP (1) EP0353576B1 (fr)
AT (1) ATE86145T1 (fr)
DE (2) DE3826039A1 (fr)
DK (1) DK367089A (fr)
ES (1) ES2040939T3 (fr)
TR (1) TR24776A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993003845A1 (fr) * 1991-08-13 1993-03-04 I.L.I.D. S.A.S. Di Paolini Michele & C. Systeme d'usinage de materiaux inertes pour la production de sable ou de granules en general, pouvant s'appliquer aux rotors de broyeurs a marteaux a la fois reversibles et non reversibles
WO1994002248A1 (fr) * 1992-07-20 1994-02-03 Henkel Kommanditgesellschaft Auf Aktien Procede pour le broyage de matieres tendres a moyennement dures, et broyeur a chocs convenant pour ce procede
US5407273A (en) * 1991-05-11 1995-04-18 Gebrueder Loedige Double bladed mixing instrument with axially displaced blades
WO1996014157A1 (fr) * 1994-11-04 1996-05-17 Henkel Kommanditgesellschaft Auf Aktien Concasseur pour produits collants

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0796148A4 (fr) * 1995-01-06 1998-12-09 Svedala New Zealand Limited Modele de rotor perfectionne

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739463C (de) * 1942-01-16 1943-09-27 Johann Kassmann Schlaeger fuer Schlagleistenmuehlen
GB754659A (en) * 1953-08-27 1956-08-08 Ludwig Pallmann Centrifugal mill
US2999652A (en) * 1959-07-27 1961-09-12 Ervin J Dear Ore pulverizing mill with centrifugal impact pulverizing action
CH568794A5 (fr) * 1973-08-14 1975-11-14 Aebi & Co Ag
US4093127A (en) * 1975-10-21 1978-06-06 Life Resources Incorporated Disintegrator and separator apparatus
US4635863A (en) * 1984-07-09 1987-01-13 Aggregates Equipment, Inc. Reversible, axially fed, cage rotor impact breaker
GB2184042A (en) * 1985-12-13 1987-06-17 Peabody Holmes Ltd Mineral crushing equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407273A (en) * 1991-05-11 1995-04-18 Gebrueder Loedige Double bladed mixing instrument with axially displaced blades
WO1993003845A1 (fr) * 1991-08-13 1993-03-04 I.L.I.D. S.A.S. Di Paolini Michele & C. Systeme d'usinage de materiaux inertes pour la production de sable ou de granules en general, pouvant s'appliquer aux rotors de broyeurs a marteaux a la fois reversibles et non reversibles
WO1994002248A1 (fr) * 1992-07-20 1994-02-03 Henkel Kommanditgesellschaft Auf Aktien Procede pour le broyage de matieres tendres a moyennement dures, et broyeur a chocs convenant pour ce procede
WO1996014157A1 (fr) * 1994-11-04 1996-05-17 Henkel Kommanditgesellschaft Auf Aktien Concasseur pour produits collants

Also Published As

Publication number Publication date
TR24776A (tr) 1992-03-09
ES2040939T3 (es) 1993-11-01
EP0353576A3 (en) 1990-10-10
ATE86145T1 (de) 1993-03-15
EP0353576B1 (fr) 1993-03-03
DE3826039A1 (de) 1990-02-01
DK367089D0 (da) 1989-07-25
DE3826039C2 (fr) 1990-11-22
DE58903639D1 (de) 1993-04-08
DK367089A (da) 1990-01-31

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