EP0300402A2 - Procédé de production de particules extrêmement petites et utilisation dudit procédé - Google Patents

Procédé de production de particules extrêmement petites et utilisation dudit procédé Download PDF

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Publication number
EP0300402A2
EP0300402A2 EP88111494A EP88111494A EP0300402A2 EP 0300402 A2 EP0300402 A2 EP 0300402A2 EP 88111494 A EP88111494 A EP 88111494A EP 88111494 A EP88111494 A EP 88111494A EP 0300402 A2 EP0300402 A2 EP 0300402A2
Authority
EP
European Patent Office
Prior art keywords
particles
impact
suspension
liquid
application
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
EP88111494A
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German (de)
English (en)
Other versions
EP0300402B1 (fr
EP0300402A3 (en
Inventor
Roland Dr.-Ing. Nied
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT88111494T priority Critical patent/ATE73015T1/de
Publication of EP0300402A2 publication Critical patent/EP0300402A2/fr
Publication of EP0300402A3 publication Critical patent/EP0300402A3/de
Application granted granted Critical
Publication of EP0300402B1 publication Critical patent/EP0300402B1/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
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/06—Jet mills
    • 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
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the so-called impact crushing process per se is generally known and applied prior art. With it, solid particles, which are to be broken down into a plurality of correspondingly smaller particles, are brought into impact with great energy to a substantially solid or rigid plate; upon impact, the relatively larger particles are broken down into the relatively smaller particles which are collected and, if appropriate after appropriate preparation, are available for further use.
  • This version of the method can also be replaced by a version of the method in which at least two penetrated gas jets are directed against one another, so that when the two gas-solid particle jets strike, solid particles of both jets meet and are broken down in the process.
  • the impact crushing method in both versions can only be used successfully for crushing particles if the mass of the particles to be broken down does not fall below a certain limit value.
  • the limit value below which it is no longer possible to use the conventional method as a result of the mass of the particles to be crushed being too small can be defined with the particle size and this again by the size of the diameter of about 1-5 ⁇ m, depending on the material to be shredded or its specific weight.
  • the conventional impact crushing process will only be applicable with success if the particles to be crushed unite Have a diameter of about 1-5 ⁇ m and the particles are not expected to break down below this range.
  • the gas flow initially has a flow direction perpendicular to the baffle, ie is directed against the baffle in order to be deflected at the baffle or directly in front of it in a direction parallel to the baffle.
  • the impact surface is the essentially rigid surface in the first process version, and part of the surface of a solid particle of the countercurrent in the second process version.
  • the particles maintain the original flow direction perpendicular to the impact surface, hit it and are broken down into smaller particles.
  • the mass of the particles is too small, so essentially their diameter is less than about 1-5 ⁇ m, the particles are deflected by the gas flow, in the extreme case they do not arrive at all, but at most with less and too small for a particle size reduction Energy on the baffle. This process is repeated until all particles have the desired fineness.
  • the particles to be comminuted are shot against one another.
  • the beam deflection means that the particles are too small from the one against the other directed direction of movement in a mutually parallel direction of movement. As a result, they no longer meet each other or with too little energy.
  • the object of the invention is to remedy this deficiency and to develop or further develop the known impact crushing method in such a way that the crushing or decomposition of the particles can be reliably expected if the particles to be crushed have such a small mass that this is caused by a particle diameter of about 1-5 microns or below is marked.
  • an essentially rigid and solid, preferably flat baffle plate 1 is provided in the usual way in the first method version (FIG. 1).
  • a suspension container 2 is arranged at a predetermined distance in front of the baffle plate 1, in which the solid particles to be comminuted are introduced into water or another suitable liquid and the choice of the introduction technique ensures that liquid and solids form a homogeneous suspension.
  • the solid particles at least partially have a particle size of approximately 1-5 ⁇ m or less, it being immaterial whether particles above this size are present or not, since the invention only deals with the solid particles whose size is in the range of approximately 1-5 ⁇ m or below.
  • the suspension can be removed from the housing at the lower, tapered end.
  • the suspension is atomized at a predetermined distance in front of the baffle plate 1 by means of an atomizing nozzle 3.
  • an atomizing part will be a liquid drop in which several solid particles, each of which are extremely small, are incorporated.
  • everyone Drops will have a mass which, in conjunction with the acceleration which is imparted to him during the atomization process, causes an energy to strike the front of the baffle plate 1 so that each solid particle, despite its low mass, is broken down into several even smaller particles.
  • Sprayed-on liquid and comminuted particles are then separated from one another in a suitable manner, whereupon the liquid for reuse, the particles comminuted to sizes well below 1-5 ⁇ m are fed to their intended purpose.
  • the second version of the impact crushing method provides for at least two gas nozzles 4, 5 directed against one another in the configuration according to the invention, from which rapid gas jets 6,7 are introduced into a container 9 filled with a suspension 8 of liquid and solid particles to be crushed.
  • the fast gas jets take up droplets from the surrounding suspension, which in turn contains several solid particles according to the law of probability.
  • the crushing takes place in the plane of the focal point of the gas jets directed against one another by the collision of the suspension drops or the solid particles therein.
  • the processes described are repeated several times for each version of the process, in particular if the suspension has a large proportion of large solid particles at the beginning, all of which are to be broken down into sizes below about 1-5 ⁇ m.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Colloid Chemistry (AREA)
EP88111494A 1987-07-22 1988-07-15 Procédé de production de particules extrêmement petites et utilisation dudit procédé Expired - Lifetime EP0300402B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111494T ATE73015T1 (de) 1987-07-22 1988-07-15 Verfahren zur erzeugung extrem kleiner partikel und anwendung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724297 1987-07-22
DE19873724297 DE3724297A1 (de) 1987-07-22 1987-07-22 Verfahren zur erzeugung extrem kleiner partikel und anwendung des verfahrens

Publications (3)

Publication Number Publication Date
EP0300402A2 true EP0300402A2 (fr) 1989-01-25
EP0300402A3 EP0300402A3 (en) 1989-11-29
EP0300402B1 EP0300402B1 (fr) 1992-03-04

Family

ID=6332144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111494A Expired - Lifetime EP0300402B1 (fr) 1987-07-22 1988-07-15 Procédé de production de particules extrêmement petites et utilisation dudit procédé

Country Status (4)

Country Link
EP (1) EP0300402B1 (fr)
AT (1) ATE73015T1 (fr)
DE (2) DE3724297A1 (fr)
ES (1) ES2029499T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641129A1 (de) * 1996-10-05 1998-04-09 Nied Roland Verfahren zum Zerlegen von Feststoffpartikeln in einem Fließbett und Vorrichtung für die Durchführung eines solchen Verfahrens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4015605A1 (de) * 1990-05-15 1991-11-21 Nied Roland Verfahren zur erzeugung feinster partikel und vorrichtung zur durchfuehrung des verfahrens
DE4241549A1 (de) * 1992-12-10 1994-06-16 Nied Roland Verfahren und Vorrichtung für die Prallzerkleinerung von Feststoffpartikeln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164856A1 (de) * 1971-12-27 1973-07-05 Texaco Development Corp Verfahren und vorrichtung zum zerkleinern grober feststoffteilchen mit hilfe von stroemungsenergie
US4261521A (en) * 1980-03-13 1981-04-14 Ashbrook Clifford L Method and apparatus for reducing molecular agglomerate sizes in fluids
US4619406A (en) * 1976-12-22 1986-10-28 Can-Am Engineering Corporation Hydraulic system and method of improving the working properties thereof
DD248296A1 (de) * 1984-10-24 1987-08-05 Guben Chemiefaserwerk Beschleunigungsrotor fuer prallmuehlen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164856A1 (de) * 1971-12-27 1973-07-05 Texaco Development Corp Verfahren und vorrichtung zum zerkleinern grober feststoffteilchen mit hilfe von stroemungsenergie
US4619406A (en) * 1976-12-22 1986-10-28 Can-Am Engineering Corporation Hydraulic system and method of improving the working properties thereof
US4261521A (en) * 1980-03-13 1981-04-14 Ashbrook Clifford L Method and apparatus for reducing molecular agglomerate sizes in fluids
DD248296A1 (de) * 1984-10-24 1987-08-05 Guben Chemiefaserwerk Beschleunigungsrotor fuer prallmuehlen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641129A1 (de) * 1996-10-05 1998-04-09 Nied Roland Verfahren zum Zerlegen von Feststoffpartikeln in einem Fließbett und Vorrichtung für die Durchführung eines solchen Verfahrens

Also Published As

Publication number Publication date
EP0300402B1 (fr) 1992-03-04
DE3868746D1 (de) 1992-04-09
EP0300402A3 (en) 1989-11-29
DE3724297A1 (de) 1989-02-02
ES2029499T3 (es) 1992-08-16
ATE73015T1 (de) 1992-03-15

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