EP0692309A1 - Procédé pour mouture à percussion et broyeur à choc - Google Patents

Procédé pour mouture à percussion et broyeur à choc Download PDF

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Publication number
EP0692309A1
EP0692309A1 EP95108931A EP95108931A EP0692309A1 EP 0692309 A1 EP0692309 A1 EP 0692309A1 EP 95108931 A EP95108931 A EP 95108931A EP 95108931 A EP95108931 A EP 95108931A EP 0692309 A1 EP0692309 A1 EP 0692309A1
Authority
EP
European Patent Office
Prior art keywords
blades
impact
rotor
chamber
rotors
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
EP95108931A
Other languages
German (de)
English (en)
Other versions
EP0692309B1 (fr
Inventor
Guido Krämer
Eugen Chrapatsch
Volodia Chrapatsch
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.)
Buehler AG
Original Assignee
Buehler AG
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Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP0692309A1 publication Critical patent/EP0692309A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
    • B02C13/205—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors arranged concentrically
    • 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

Definitions

  • the invention relates to a method for impact milling, in particular of granular ground material such as grain or cubes, according to the preamble of claim 1, and an impact mill with coaxial rotating rotors driven rotors according to the preamble of claim 4.
  • It is particularly used for grinding regrind for animal feed.
  • centrifugal channels have also been proposed (see DE-PS-699100 and DE-A-3708914) in order to use the energy imparted to the regrind particles to convey them out of the impact area onto a subsequent sieve. Even with such tangential centrifugal channels, the ground material is thrown onto the sieve.
  • impact mills have a fixed housing with a rotor arranged and driven therein. It is also known to design disintegrators for very fine comminution with two coaxial rotors driven in opposite directions (DE-A-3417556).
  • the rotors each carry at least two concentric blade rings, the blade rings of both rotors alternately intermeshing. Both rotors are driven by a common drive.
  • one rotor is fastened to a hollow shaft and the other rotor is arranged on a shaft which penetrates the hollow shaft via a bushing. Both shafts are stored in an external bearing.
  • the high design effort is necessary to achieve a turbo effect in accordance with EP-A-48012 with a safe bearing function.
  • the invention has for its object to provide a method for impact milling of granular regrind and an impact mill for carrying out the method, which allows a high degree of uniformity of the grinding of the material to be ground (little scattering of the particle size) with a minimal content of dust fractions with little technical and economic effort . This is done in a surprisingly simple manner by the features of the characterizing part of claims 1 and 2, respectively.
  • the regrind is passed to a first grinding stage, where it is accelerated in a defined direction and strikes a surface of work organs. Under the action of impact, the regrind grains are comminuted into particles of different sizes by transmitting the speed vector opposite to the acceleration. The shredded particles then go to a separator, where they are separated accordingly. The separator is located outside the crushing zone and the particles approach each other tangentially. The particles of the desired size are discharged as a finished product, and coarse particles are returned to the comminution zone in a second comminution stage, where they are subjected to an acceleration and impact again, however, in contrast to the first stage, finer particles are formed. There is again a separation into coarse and finished product outside the comminution zone, the coarse product again being fed to the first comminution stage.
  • the crushing cycle is closed and the particles are separated outside of that, which allows both a reduction in energy consumption and wear of the separating device.
  • differentiated treatment of particles of different sizes is achieved.
  • the use of two comminution stages allows the influence on particles with different processing intensities in each stage.
  • the process can be carried out in an impact or impact mill with a cylindrical chamber, which has inlet and outlet connections for the regrind as well as rotors which are coaxially installed therein and which rotate in the opposite direction with the working elements attached to them.
  • the chamber is perforated and divided into two chamber regions by means of the rotors, the regions being connected to one another by intersecting channels which are arranged outside their boundaries and which result in a closed flow of the ground material.
  • the result is a closed grinding process with a predeterminable particle size and the possibility of automatic control of the process.
  • the number of transfer stages of the coarse fractions from the work area 12 into the work area 13 depends on the type of the ground material, its moisture and the intensity of the impact.
  • rotors 6 and 8 with blades 7 and 9 attached to them are arranged horizontally and coaxially.
  • the rotors 6, 8 are surrounded on their outer circumference by a sieve 5, as a result of which a cylindrical chamber 4, which is divided into two working areas 12 and 13 by the rotors 6, 8.
  • the rotors 6, 8 are driven by electric motors 10 and 11.
  • the rotor 6 has two rows and the rotor 8 has a row of blades 7, 9, which is divided into two halves with the rotor disk. One half of the blades 9 of the rotor 8 is arranged between the rows of blades of the rotor 6.
  • An inlet 2 which is arranged on the side of the working area 12 on the housing 1, serves to feed the impact mill with regrind.
  • An outlet 3 for the ground material (finished product) is arranged below the chamber 4.
  • channels 14 and 15 are arranged on the housing 1 for returning the insufficiently comminuted (coarse) particle fractions.
  • the channels 14, 15 are arranged outside the chamber 4.
  • the width of the channel 14 corresponds to the width of the row of blades 7 of the rotor 6, which is arranged closer to the axis 16.
  • the channel 14 has a curved, curved shape, starting from the chamber 4 and opening laterally and centrally into the working area 13.
  • Channel 15 is designed analogously. It also starts from chamber 4 and opens laterally and centrally into work area 12.
  • the size of the gap between the ends of the blades 7 and the sieve 5 is to be dimensioned such that the movement of the comminuted product on the sieve 5 takes place under the action of the centrifugal force without the direct action of the outer blades 7.
  • the angle of attack of the blades 7, 9 should be chosen to be correspondingly small in order to achieve the described wear-reducing movement path of the particles.
  • the electric motors 10, 11 are loaded approximately the same.
  • the perforated part of the chamber 4 can be dismantled in order to allow a screen change.
  • the perforated part of the chamber 4 should also take up as large a part of its cylindrical surface as possible in order to achieve an efficient separation process.
  • the number of grinding stages can be increased, e.g. B. on seven stages, the rotor 6 then having three and the rotor 8 two rows of blades 7, 9.
  • the impact mill When grinding grain into flour, the impact mill can be used as a B1 and B2 passage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP95108931A 1994-07-14 1995-06-09 Procédé pour mouture à percussion et broyeur à choc Expired - Lifetime EP0692309B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2247/94 1994-07-14
CH224794 1994-07-14
CH224794 1994-07-14

Publications (2)

Publication Number Publication Date
EP0692309A1 true EP0692309A1 (fr) 1996-01-17
EP0692309B1 EP0692309B1 (fr) 1999-09-08

Family

ID=4229311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108931A Expired - Lifetime EP0692309B1 (fr) 1994-07-14 1995-06-09 Procédé pour mouture à percussion et broyeur à choc

Country Status (5)

Country Link
EP (1) EP0692309B1 (fr)
DE (1) DE59506766D1 (fr)
ES (1) ES2138113T3 (fr)
RU (1) RU2153935C2 (fr)
UA (1) UA44235C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764470A1 (fr) * 1995-09-25 1997-03-26 Bühler Ag Procédé pour mouture à percussion et broyeur à choc

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2563695C1 (ru) * 2014-07-08 2015-09-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" Дезинтегратор
RU2563693C1 (ru) * 2014-07-08 2015-09-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" Дезинтегратор
RU2579491C1 (ru) * 2015-02-16 2016-04-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" Дезинтегратор
RU183474U1 (ru) * 2017-03-20 2018-09-24 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" Центробежная мельница

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB135955A (en) * 1918-12-06 1919-12-08 William Stephenson Barron Improvements relating to Impact Grinders.
GB191977A (en) * 1922-02-27 1923-01-25 George Porteus Improvements in or relating to disintegrators
DE699100C (de) 1939-10-25 1940-11-22 Adolf Steinbrueckner Hammermuehle
FR1189754A (fr) * 1958-01-14 1959-10-06 Broyeur
FR2084599A5 (fr) * 1970-03-13 1971-12-17 Estkolkhozproekt
EP0048012A2 (fr) 1980-09-16 1982-03-24 HAMMONA Immobilien-Anlagen GmbH Appareil de désintégration et procédé pour sa mise en fonctionnement
DE3417556A1 (de) 1984-05-11 1985-11-21 AGEFA Aktiengesellschaft für Aufbereitungstechnologie, Zunzgen Desintegrator
GB2166368A (en) * 1983-12-28 1986-05-08 Tallinsk Polt Inst Disintegrator
EP0051389B1 (fr) 1980-11-01 1987-01-21 Sardon International Limited Appareils à broyer
DE3708914A1 (de) 1986-03-24 1987-10-08 Buehler Ag Geb Anlage mit mindestens einer schlagmuehle

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB135955A (en) * 1918-12-06 1919-12-08 William Stephenson Barron Improvements relating to Impact Grinders.
GB191977A (en) * 1922-02-27 1923-01-25 George Porteus Improvements in or relating to disintegrators
DE699100C (de) 1939-10-25 1940-11-22 Adolf Steinbrueckner Hammermuehle
FR1189754A (fr) * 1958-01-14 1959-10-06 Broyeur
FR2084599A5 (fr) * 1970-03-13 1971-12-17 Estkolkhozproekt
EP0048012A2 (fr) 1980-09-16 1982-03-24 HAMMONA Immobilien-Anlagen GmbH Appareil de désintégration et procédé pour sa mise en fonctionnement
EP0051389B1 (fr) 1980-11-01 1987-01-21 Sardon International Limited Appareils à broyer
GB2166368A (en) * 1983-12-28 1986-05-08 Tallinsk Polt Inst Disintegrator
DE3417556A1 (de) 1984-05-11 1985-11-21 AGEFA Aktiengesellschaft für Aufbereitungstechnologie, Zunzgen Desintegrator
DE3708914A1 (de) 1986-03-24 1987-10-08 Buehler Ag Geb Anlage mit mindestens einer schlagmuehle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764470A1 (fr) * 1995-09-25 1997-03-26 Bühler Ag Procédé pour mouture à percussion et broyeur à choc

Also Published As

Publication number Publication date
ES2138113T3 (es) 2000-01-01
RU2153935C2 (ru) 2000-08-10
EP0692309B1 (fr) 1999-09-08
UA44235C2 (uk) 2002-02-15
DE59506766D1 (de) 1999-10-14

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