EP0692309B1 - 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
EP0692309B1
EP0692309B1 EP95108931A EP95108931A EP0692309B1 EP 0692309 B1 EP0692309 B1 EP 0692309B1 EP 95108931 A EP95108931 A EP 95108931A EP 95108931 A EP95108931 A EP 95108931A EP 0692309 B1 EP0692309 B1 EP 0692309B1
Authority
EP
European Patent Office
Prior art keywords
blades
rotor
mill
impact
chamber
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
EP95108931A
Other languages
German (de)
English (en)
Other versions
EP0692309A1 (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
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 Buehler AG filed Critical Buehler AG
Publication of EP0692309A1 publication Critical patent/EP0692309A1/fr
Application granted granted Critical
Publication of EP0692309B1 publication Critical patent/EP0692309B1/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
    • B02C13/20—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 in particular to a method for impact milling of granular regrind such as grain or cubes the preamble of claim 1 and an impact mill with coaxial rotating rotors driven in opposite directions after the Preamble of claim 4.
  • It is particularly used for grinding regrind for animal feed.
  • impact mills have a fixed housing a rotor arranged and driven therein. It is also known disintegrators for very fine comminution with two coaxial, counter-rotating drives Form rotors (DE-A-3417556).
  • the rotors each carry at least two concentric blade rings, the Interchangeably intermesh blade rings of both rotors. Both rotors are driven by a common one Drive.
  • the one rotor is on a hollow shaft attached and the other rotor via a socket on one that Hollow shaft penetrating shaft arranged. Both waves are stored in an outdoor storage.
  • the high design effort is required to create a turbo effect according to EP-A-48012 to achieve with safe storage function.
  • the invention has for its object a method for Impact grinding of granular regrind and an impact mill for Implementation of the procedure to create the low technical and economic effort a high degree of uniformity the grinding of the ground material (low scatter of the Particle size) with a minimal content of dust fractions. This is done in a surprisingly simple way by the features of the characterizing part of claim 1 or 2.
  • the regrind is first in a rotating movement accelerated and subsequently bounced by converting the speed vector into one of the acceleration opposite vector. Acceleration and Impact alternate cyclically in two intermediate zones, which are not yet comminuted enough by currents Particles are associated with excretion of particles desired size between cycles.
  • the regrind is passed to a first grinding stage, where it is accelerated in a defined direction and against one Surface of working organs bounces. Under the impact the regrind grains are in particles of different sizes communicating the opposite of the acceleration Shredded speed vector. Then the shredded Particles on a separator, where appropriate be separated. The separator is outside the shredding zone arranged and the particles approach tangentially on. The particles of the desired size are used as a finished product dissipated, coarse particles get into the Shredding zone to a second shredding stage and are subjected to acceleration and impact again however, unlike the first stage, finer Particles are created. A separation follows again in coarse and finished product outside the shredding zone, the coarse product again the first size reduction is fed.
  • the shredding cycle is closed and the separation the particle occurs outside of what is both a subsidence of energy consumption and wear and tear Separation device allowed. At the same time it becomes a differentiated Treatment of different sized particles achieved.
  • the use of two shredding levels allowed an influence on particles with different processing intensity at every stage.
  • the process can be carried out in an impact or impact mill with a cylindrical Chamber with inlet and outlet nozzle for the Regrind as well as coaxially installed rotors in it attached work organs in the opposite direction rotate, run.
  • the chamber is perforated executed and divided into two chamber areas by means of the rotors, with the areas crossing each other Channels are connected that are outside their limits are arranged and the a closed flow of the Result in ground material.
  • the result is a closed grinding process with a predefinable one Particle size and the possibility of automatic Control the process.
  • An impact mill is fed with the material to be ground. This enters an in free fall via an inlet 2 first working area 12 of a chamber 4.
  • This is the regrind under the influence of a, by a rotary movement of a Rotor 6 generated airflow on a first row of blades 7 of the rotor 6 passed.
  • the individual grains of the ground material are captured by these blades 7, accelerated and against blades 9 of a rotor 8 at high speed thrown.
  • the blades 9 are located between the first and a second row of blades 7 of the rotor 6.
  • the number of transfer stages of the coarse fractions from the work area 12 in the work area 13 depends on the art of the ground material, its moisture and the intensity of the Impact.
  • a housing 1 of the impact mill In a housing 1 of the impact mill are horizontal and coaxial Rotors 6 and 8 with blades 7 and 9 attached thereto.
  • the rotors 6, 8 of surround a sieve 5, whereby a cylindrical chamber 4, the divided into two working areas 12 and 13 by the rotors 6, 8 is, is formed.
  • 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 divided with the rotor disk in half is. One half of the blades 9 of the rotor 8 is between arranged the rows of blades of the rotor 6.
  • An inlet 2 which is located on the side of the working area 12 on the housing 1 is arranged, is used to feed the impact mill with regrind.
  • channels 14 and 15 are on the housing 1 arranged to return the insufficiently shredded (coarse) particle fractions.
  • the channels 14, 15 are outside the chamber 4 arranged.
  • the width corresponds to that Channel 14 of the width of the row of blades 7 of the rotor 6, which is arranged closer to axis 16.
  • Channel 14 has one curved, curvilinear shape, starting from chamber 4 and laterally and centrally opening into work area 13.
  • Analogous Channel 15 is designed. He also leaves the chamber 4 and flows out laterally and centrally into the work area 12th
  • the size of the gap between the ends of the blades 7 and the sieve 5 is dimensioned so that the movement of the shredded Product on the screen 5 under the action of centrifugal force without direct influence from the outside Buckets 7 takes place.
  • the angle of attack of the blades 7, 9 is correspondingly small to choose 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 is removable to one To allow screen changes.
  • the perforated part of the chamber 4 should also be as possible take up a large part of their cylindrical surface, to achieve an efficient separation process.
  • the number of grinding stages can be increased be, e.g. B. on seven stages, the rotor 6 then three and the rotor 8 has two rows of blades 7, 9.
  • the impact mill is used for grinding grain into flour possible as B1 and B2 passage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (9)

  1. Procédé de broyage par choc d'une matière à broyer, notamment en grains, par utilisation d'un broyeur à rotors disposés horizontalement, qui tournent dans des sens opposés l'un vis-à-vis de l'autre, et par agencement d'un canal centrifuge, connu en lui-même, pour renvoyer la matière broyée après un premier étage de broyage vers un autre étage de broyage, la matière broyée étant d'abord envoyée dans une chambre (4) comportant les rotors d'un broyeur à choc, caractérisé
    a. en ce que la matière à broyer est accélérée au moyen d'aubes (7) d'un premier rotor (6) et heurte des aubes (9) d'un rotor (8) tournant en sens opposé et est broyée.
    b. en ce que la matière broyée rencontre un tamis (5) sous un angle faible, suivant la direction de la trajectoire de déplacement du rotor (6), et est séparée en fractions.
    c. en ce que la fraction grossière restante est transférée suivant la direction de la trajectoire et est soumise à une accélération, à une percussion et à un tamisage nouveaux, les étages de broyage de a. et c. étant exécutés dans des zones de travail (12, 13) de la chambre (4) qui sont séparées l'une de l'autre.
  2. Procédé suivant la revendication 1, caractérisé en ce que le transfert de la fraction grossière suivant c, a lieu dans un canal (14, 15).
  3. Procédé suivant la revendication 1, caractérisé en ce qui l'accélération et la percussion alternent d'une manière cyclique dans deux zones intermédiaires qui sont reliés l'une a l'autre au moyen de courants de matière insuffisamment broyée, avec une séparation fine entre les étages de broyage, la percussion ayant lieu dans les étages intermédiaires avec une intensité différente.
  4. Broyeur à choc pour la mise en oeuvre du procédé suivant la revendication 1, caractérisé en ce que le broyeur à choc est constitué d'un boítier (1), comportant des rotors (6, 8) qui y sont disposés horizontalement et coaxialement et sur lesquels des aubes (7, 9) sont fixées, le premier rotor (6) comprenant au moins deux rangées d'aubes (7) et l'autre rotor (8) au moins une rangée d'aubes (9) qui est disposée entre les rangées des aubes (7), d'un tamis (5) entourant les rotors (6, 8) sur leur périphérie extérieure, d'une entrée (2) disposée latéralement par rapport à la chambre (4) et d'une sortie (3) disposée au-dessous de la chambre (4), et en outre de canaux (14, 15) constituant un prolongement du tamis (5).
  5. Broyeur à choc suivant la revendication 4, caractérisé en ce que les rangées des aubes (7, 9) sont divisées en moitiés par le disque de rotor et forment ainsi des zones de travail (12, 13) séparées.
  6. Broyeur à choc suivant la revendication 4, caractérisé en ce que les conduits (14, 15) sont disposés à l'extérieur de la chambre (4) et, en partant de la chambre (4), débouchent latéralement, suivant une forme en courbe, dans les zones de travail (13, 12), la largeur du conduit (14) correspondant à la largeur de la série intérieure des aubes (7).
  7. Broyeur à choc suivant la revendication 4, caractérisé en ce que le tamis (5) est interchangeable.
  8. Broyeur à chaque suivant la revendication 4, caractérisé en ce que les rotors (6, 8) sont entraínés en tournant dans des sens opposés, de préférence au moyen d'entraínements séparés.
  9. Broyeur à choc suivant la revendication 4, caractérisé en ce que les aubes (7, 9) présentent un angle d'inclinaison qui n'est de préférence pas supérieur à 15°.
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 EP0692309A1 (fr) 1996-01-17
EP0692309B1 true 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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH690709A5 (de) * 1995-09-25 2000-12-29 Buehler Ag Verfahren zur Prallvermahlung und Prallmühle.
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

Family Cites Families (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
DE3034849A1 (de) 1980-09-16 1982-04-29 Kasa-Forschungs- und Entwicklungs-Gesellschaft mbH & Co KG für Verfahrenstechnik, 6000 Frankfurt Desintegrator und verfahren zum betrieb des desintegrators
NZ198677A (en) 1980-11-01 1985-11-08 Sardon Int Ltd Pulveriser with classifier
SU1258478A1 (ru) * 1983-12-28 1986-09-23 Таллинский Политехнический Институт Устройство дл измельчени
DE3417556A1 (de) 1984-05-11 1985-11-21 AGEFA Aktiengesellschaft für Aufbereitungstechnologie, Zunzgen Desintegrator
CH669337A5 (fr) 1986-03-24 1989-03-15 Buehler Ag Geb

Also Published As

Publication number Publication date
RU2153935C2 (ru) 2000-08-10
UA44235C2 (uk) 2002-02-15
DE59506766D1 (de) 1999-10-14
ES2138113T3 (es) 2000-01-01
EP0692309A1 (fr) 1996-01-17

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