EP0601511B1 - Procédé et dispositif de brayage à impact pour particules solides - Google Patents

Procédé et dispositif de brayage à impact pour particules solides Download PDF

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Publication number
EP0601511B1
EP0601511B1 EP93119613A EP93119613A EP0601511B1 EP 0601511 B1 EP0601511 B1 EP 0601511B1 EP 93119613 A EP93119613 A EP 93119613A EP 93119613 A EP93119613 A EP 93119613A EP 0601511 B1 EP0601511 B1 EP 0601511B1
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EP
European Patent Office
Prior art keywords
suspension
solid particles
fluid
fluid jet
container
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
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EP93119613A
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German (de)
English (en)
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EP0601511A1 (fr
Inventor
Roland Dr.-Ing. Nied
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Individual
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Individual
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    • 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

Definitions

  • EP 0300402 B1 deals with the generation of extremely small particles in such a way that the particles to be crushed, which already have a relatively small mass, initially in be suspended in a fluid and this suspension out Fluid with particles suspended therein for impact is brought to an area, but measures are provided with which the impact energy increases becomes. For this purpose, the suspension becomes drop-shaped Suspended subsets taken, which in turn cause impact be induced on the area. That kind of Impact crushing is based on the consideration that the comminution of particles is only successful can be if the mass of the particles to be broken down does not fall below a certain limit.
  • any of these Droplet is of the same kind from each other Droplets separated and the mass of these droplets now in turn entrained by a carrier fluid stream and brought to impact on the baffle.
  • a carrier fluid stream Instead of individual Solid particles that flow directly from a carrier fluid carried away and inadequate because of their small mass brought to impact on the impact surface and accordingly everyone will be crushed inadequately Solid particles first of all become part of a Droplets of larger mass made that with much higher energy is impacted and as a result The impact energy so increased can also solid particles extremely small mass can be smashed even further.
  • the first fluid usually becomes a liquid
  • the second fluid ie the carrier fluid
  • the carrier fluid be a gas
  • the Suspension of liquid and solid particles suspended in it with only a small mass is in a container contained and in this container and thus in the suspension a gas stream with high energy is blown in Droplets from subsets of liquid and those contained therein Entrains solid particles and in the manner described makes you bounce.
  • the first option is largely the one already described Technology in which the of a gas stream entrained partial suspension of liquid droplets and contained them in the smallest possible number Solid particles on a baffle is made to hit.
  • the second option is a modification in the Way that in the container with the suspension a suspension is introduced after beforehand with a fluid with high flow energy has been provided to a crushing in the Container through energy exchange between solid particles the one remaining in the container and the one with high flow energy introduced into the container
  • the effect then special is achieved favorably if several against each other directed high energy gas jets the impact crushing means at least two suspension subsets accelerated against each other is carried out.
  • the present invention is based on the consideration that regardless of which of the two ways to apply comes, a breakdown of solid particles already comes about within or within everyone Impact crushing takes place by Solid particles within the respective partial suspension amount meet and thus smash each other or disassemble.
  • the reasoning continues that the Possibility of this type of impact crushing within one Fluid jet of fluid and solid particles with increasing Distance from the beam source increases because within the There is a certain amount of turbulence that the clashing takes place favored by solid particles, that, however, the jet and thus also between solid particles exchanged energy with increasing distance of the beam from the beam source decreases and that finally in the area of the entry of the carrier fluid in the suspension in the form of an energy beam there are still few solid particles in the jet, that can meet and smash each other.
  • the object of the present invention is derived from this which consists of the impact crushing in the high energy Suspension partial quantity jet on one if possible promote long length of the beam and in particular already the possibility directly in the area of the radiation source for impact crushing of solid particles create.
  • a fluid 2 in which it can be a gas or a liquid (Fig. 1).
  • Solid particles 3 are suspended in this fluid, so that the container 1 a suspension 4 from in a fluid 2 suspended solid particles 3.
  • the diameter of a single one of the many solid particles 3 can be between 1 and 5 microns, preferably is its diameter, however, is already less than 1 ⁇ m.
  • By appropriate manipulation can, but does not have to, as few solid particles as possible with a specific one Fluid amount coagulated into a drop, its diameter should be around 50 ⁇ m. This results in, that, as mentioned, the fluid 2 is a gas or a liquid can act, but it is preferred is a liquid.
  • the fast fluid jets 9, 10 are preferably gas jets, without being exclusive and necessary have to.
  • the solid particles are broken down exclusively through energy exchange between the solid particles, with the problem particularly clearly shows that an energy exchange takes place only in one certain distance from the nozzles 7,8 where the energy of the gas jets is already a certain reduction has experienced that naturally directly at the nozzle outlet is greatest. That becomes with the state of the art Accepted because there is no exchange of energy between Solid particles is thought to go beyond a certain Distance from the nozzles in each of the fast gas jets are incorporated.
  • the primary thought is one Energy exchange between particles, one of the gas jets are to be assigned and particles that the other of the two gas jets can be assigned.
  • the present invention is now concerned so that an energy exchange between solid particles immediately after the discharge of fluid jets from one or more nozzles. Because of that are immediately following the respective fluid jet after leaving the respective nozzle, additional solid particles supplied with the exiting from the nozzle Suspension beam into an active connection and an energy exchange with those in the suspension jet immediately after the solid particles already contained in the nozzle occur (Fig. 1) or in an energy exchange kick with the solid particles caused by the fast Fluid jets from leaving the at least one nozzle 7,8 step on (Fig. 2).
  • the additional solid particles can now be different Be made available, particularly appropriate however, is to provide them as part of a suspension, those before insertion in the area of the nozzles 7.8 is removed from the suspension 4.
  • a housing 12 is one at one end that is the nozzle outlet is arranged on the outside tapering tube 13, whose inside diameter is constant.
  • This tube 13 occurs through the outlet end of the housing with a defined Radial play out, but without a federal approach projecting the housing.
  • Via a radial inlet 14 becomes the annular space 15 between the tube 13 and the housing 12 introduced a fluid in which granules are suspended.
  • a blade ring 16 ensures that the suspension Annulus 15 in such a way that it leaves the pipe 13 emerging fluid flow concentrically and evenly surrounds and thereby even with the fluid flow from the Tube 13 is mixed, insofar as this does not cause this fluid flow substantial energy is withdrawn.
  • FIG. 3 can be, for example, the nozzle 11 of the system Fig. 1, according to each of the two nozzles 7,8 of the system Fig. 2 or one and then only one of the nozzles 7.8 in an investment that is basically in accordance with the investment FIG. 2 corresponds, but with one of the designs shown in FIG. 3 Nozzles 7 or 8 get along because they meet of solid particles of suspension 4 with solid particles 3 an energy exchange in the exit jet of the nozzle takes place, which leads to a particle decomposition.
  • the suspension 4 from one Gas and solid particles or from a liquid with To let solid particles exist.
  • it is a suspension of a liquid and solid particles.
  • a gas or a liquid is brought out from the tube 13 of the nozzle shown in FIG. 3, a gas or a liquid is brought out.
  • a gas or a liquid is brought out.
  • it is a gas.
  • the exiting from the tube 13 Fluid is accelerated to flow through the tube 14 entrained suspension entrained, accelerated and give her the necessary energy.
  • the pipe 14 for entry into the nozzle according to FIG. 3 induced suspension can be a gas or a liquid with solid particles suspended therein.
  • she can can be prepared in any way. Preferably acts it is a liquid with solid particles suspended in it.
  • this suspension is preferred taken from container 1 or 6, i.e. is a subset the suspension 4 taken in the container 1 or 6 and is returned to the container.
  • the invention is particularly effective when the first fluid with the solid particles to be broken down, 2 in the case of FIG. 2, the suspension 4, already have a significant proportion of solid particles contains only a small mass, as is the case with modern classifiers the case is because these only want extremely fine visual goods is removed, that is, the material returned to the mill Good still a high proportion of relatively finely ground Contains well.

Claims (7)

  1. Procédé de fragmentation par impact de particules solides (3) en utilisant un fluide (2), dans lequel sont en suspension les particules solides (3) à fragmenter, la suspension (4) se trouvant dans un récipient (1 ; 6) dans lequel est prélevée une fraction de suspension pour provoquer le choc des particules solides qu'elle contient contre une surface d'impact, caractérisé en ce que la fraction de suspension, prélevée dans le récipient (1 ; 6), est d'abord amenée à une buse (7, 8, 11) afin d'y associer un jet de fluide supplémentaire pour l'accélérer et en augmenter l'énergie, afin de former un jet de fluide (7, 8, 17) à grande vitesse et à contenu énergétique élevé, composé de la fraction de suspension et du jet de fluide supplémentaire, et de l'amener à heurter contre la surface d'impact.
  2. Procédé selon la revendication 1, caractérisé en ce que l'adjonction du jet de fluide supplémentaire (18) à la fraction de suspension s'effectue immédiatement dans la zone de la sortie de la buse.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le jet de fluide supplémentaire (18) est également constitué par une suspension.
  4. Procédé selon la revendication 3, caractérisé en ce que la suspension pour le jet de fluide supplémentaire (18) est prélevée dans le récipient (1, 6) tout comme la fraction de suspension.
  5. Procédé selon les revendications 1 à 4, caractérisé en ce que la surface d'impact est constituée par des particules solides de la fraction de suspension et du jet de fluide supplémentaire (18), formé par une suspension, et en ce que la fraction de suspension et le jet de fluide supplémentaire (18), formé par une suspension, constituent le lit fluidisé (17) d'un désintégrateur à jet de lit fluidisé.
  6. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la surface d'impact est une surface d'impact (5) fixe, située à l'extérieur du récipient (1).
  7. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le jet de fluide (9, 10) à grande vitesse est réinjecté, par l'intermédiaire de la buse (7, 8), dans le récipient (6) de telle manière que la surface d'impact soit constituée par les particules solides en suspension dans la suspension (4) restée dans le récipient.
EP93119613A 1992-12-10 1993-12-06 Procédé et dispositif de brayage à impact pour particules solides Expired - Lifetime EP0601511B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4241549A DE4241549A1 (de) 1992-12-10 1992-12-10 Verfahren und Vorrichtung für die Prallzerkleinerung von Feststoffpartikeln
DE4241549 1992-12-10

Publications (2)

Publication Number Publication Date
EP0601511A1 EP0601511A1 (fr) 1994-06-15
EP0601511B1 true EP0601511B1 (fr) 1998-08-26

Family

ID=6474839

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Application Number Title Priority Date Filing Date
EP93119613A Expired - Lifetime EP0601511B1 (fr) 1992-12-10 1993-12-06 Procédé et dispositif de brayage à impact pour particules solides

Country Status (4)

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EP (1) EP0601511B1 (fr)
JP (1) JPH06269693A (fr)
DE (2) DE4241549A1 (fr)
ES (1) ES2121921T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513035C2 (de) * 1995-04-06 1998-07-30 Nied Roland Fließbett-Strahlmahlung
DE19728382C2 (de) * 1997-07-03 2003-03-13 Hosokawa Alpine Ag & Co Verfahren und Vorrichtung zur Fließbett-Strahlmahlung
US7511079B2 (en) * 2003-03-24 2009-03-31 Baxter International Inc. Methods and apparatuses for the comminution and stabilization of small particles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU643188A1 (ru) * 1977-04-01 1979-01-25 Уральский ордена Трудового Красного Знамени политехнический институт им. С.М.Кирова Струйна мельница с псевдоожиженным слоем
US4248387A (en) * 1979-05-09 1981-02-03 Norandy, Inc. Method and apparatus for comminuting material in a re-entrant circulating stream mill
DE3724297A1 (de) * 1987-07-22 1989-02-02 Nied Roland Verfahren zur erzeugung extrem kleiner partikel und anwendung des verfahrens
DE4015605A1 (de) * 1990-05-15 1991-11-21 Nied Roland Verfahren zur erzeugung feinster partikel und vorrichtung zur durchfuehrung des verfahrens
US5133504A (en) * 1990-11-27 1992-07-28 Xerox Corporation Throughput efficiency enhancement of fluidized bed jet mill

Also Published As

Publication number Publication date
JPH06269693A (ja) 1994-09-27
EP0601511A1 (fr) 1994-06-15
ES2121921T3 (es) 1998-12-16
DE59308927D1 (de) 1998-10-01
DE4241549A1 (de) 1994-06-16

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