EP0736328B1 - Dispositif pour broyeur à jet à lit fluidisé - Google Patents

Dispositif pour broyeur à jet à lit fluidisé Download PDF

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Publication number
EP0736328B1
EP0736328B1 EP96105333A EP96105333A EP0736328B1 EP 0736328 B1 EP0736328 B1 EP 0736328B1 EP 96105333 A EP96105333 A EP 96105333A EP 96105333 A EP96105333 A EP 96105333A EP 0736328 B1 EP0736328 B1 EP 0736328B1
Authority
EP
European Patent Office
Prior art keywords
jet
nozzle
main
auxiliary
auxiliary nozzles
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
EP96105333A
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German (de)
English (en)
Other versions
EP0736328A1 (fr
Inventor
Roland Dr.-Ing. Nied
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Individual
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Individual
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Publication date
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Publication of EP0736328A1 publication Critical patent/EP0736328A1/fr
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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
    • B02C19/06—Jet mills
    • B02C19/068—Jet mills of the fluidised-bed type
    • 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

  • the present invention is concerned with fluid bed jet milling.
  • a fluidized bed of fluidized solid particles is a steam or preferably by means of a nozzle Gas jet initiated at high speed.
  • the beam In the beam there is a negative pressure, which is why solid particles from the Fluid bed can be sucked into the jet.
  • the beam In the beam they are sucked solid particles to the high speed of the Accelerated gas jet. This is done for shredding the solid particle necessary momentum exchange between the solid particles.
  • the speed and therefore vacuum distribution in the gas jet is cause for the particle distribution is uneven across the beam cross section such that the vast majority of the sucked solid particles remain in the edge area of the gas jet and in Core area of the gas jet carried relatively few particles become.
  • the energy of the gas jet becomes correspondingly inadequate used for impact crushing.
  • DE-PS 598 421 Known impact crushing by means of a in Fluidized bed of steam or gas jet can, for example can be referred to DE-PS 598 421.
  • DE 42 43 438 A1 and DE-OS 20 40 519 are concerned on the one hand and DE 33 38 138 C2 on the other hand under different Points of view.
  • DE 42 43 438 A1 proposes the size of the beam pulse when exiting the jet nozzle in the peripheral area of the Nozzle cross section at least twice between a minimum and a maximum value and the size of the To keep the beam pulse in the core area at most at one value, which corresponds to the minimum value of the peripheral area. It are with this solution in the beam areas with low Beam pulse immediately after the beam emerges the jet nozzle creates flow channels transverse to the jet direction, in which a pressure drop from the jet edge to the jet core exists so that solid particles from the beam edge in the Beam core are sucked.
  • the object of the present invention is therefore a To design the device so that the particle distribution in one with high energy in a fluid bed of a fluid bed jet mill introduced gas jet over the jet cross section and in particular the loading of this gas jet with solid particles from the fluidized bed also in the jet core area with simple and reliable-acting agents better than before was achieved is guaranteed.
  • a main nozzle 2 is arranged in a nozzle housing 1, in a gas jet fed through the feed 3 is strong is accelerated (Laval nozzle) before it leaves the main nozzle 2.
  • the common longitudinal axis of the rotationally symmetrical nozzle 2 and the consequently rotationally symmetrical exit jet 4 is designated by 5.
  • Auxiliary nozzles 6.7 are offset from one another by 180 ° Assigned main nozzle 2 in such a way that the angle between the longitudinal axis 5 of the main nozzle 2 or that of the main nozzle emerging gas or steam jet 4 and each of the Longitudinal axes 8, 9 of the auxiliary nozzles 6, 7 or those emerging from them
  • Auxiliary jets 10, 11 made of the same gas or Steam exist, like the main gas jet emerging from the main nozzle 2, in the range between 5 ° and 60 °, preferably in the range between 25 ° and 45 °.
  • the three gas jets arrive through a common chamber 12 in the front of the nozzle housing 1, which is open in the beam direction, in the bed 13.
  • the fluidized bed 13 sucked into the main gas jet 4 and therein brought up to the speed of the main gas jet.
  • the gas jet finds an energy exchange between the sucked solid particles instead of them into smaller ones Particles disassembled.
  • the mass of the particles would be predominantly in the edge area of the (main) gas jet stop and the impact crushing would predominantly on this area may be limited.
  • the auxiliary gas jets emerge from the Auxiliary nozzles into the main gas flow and "push" part of the suction Particles in the core area of the main gas jet.
  • Each nozzle unit is a nozzle unit according to FIG. 1.
  • the main beam and auxiliary beams assigned to it meet in one Union area and around the center 14 of the cylindrical Housing 15 together.
  • a breakdown of solid particles takes place when the three grinding jets meet, but also in each of the three grinding jets, which is why the entire device with the three units A, B, C and the housing 15 is designed so that the three grinding jets meet with great energy and penetrate each other and the particles in all three gas jets over their Cross sections are largely evenly distributed.
  • the housing 15 is a relatively short cylindrical drum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Claims (7)

  1. Dispositif pour broyage à jet à lit fluidisé dans lequel un jet de gaz ou de vapeur de grande vitesse sort d'une buse pour entrer dans un lit fluidisé afin d'aspirer des particules de matières solides dudit lit fluidisé, et dans lequel il est prévu des moyens destinés à homogénéiser la répartition des particules sur la section du jet de gaz ou de vapeur, caractérisé par le fait que les moyens destinés à homogénéiser la répartition des particules sur la section du jet sont constitués par des buses auxiliaires (6, 7), affectées à une buse principale (2) et conçues de manière telle que le sens de sortie du jet de la buse auxiliaire est oblique par rapport au sens de sortie (5) du jet de la buse principale et que les jets auxiliaires pénètrent immédiatement dans le jet principal dès que ce dernier a quitté la buse principale.
  2. Dispositif selon la revendication 1 caractérisé par la disposition de trois buses auxiliaires par rapport à une buse principale (2), dans laquelle les buses auxiliaires sont réparties régulièrement autour de la buse principale (2), où les orifices de sortie de la buse principale et des buses auxiliaires se trouvent dans un plan et où l'axe du jet (8, 9) de chacune des buses auxiliaires coupe l'axe du jet (5) de la buse principale avec un angle compris entre 5° et 60°.
  3. Dispositif selon la revendication 2 caractérisé par le fait que la plage d'angle va de 25° à 45°.
  4. Dispositif selon l'une des revendications 1 à 3 caractérisé par le fait que la buse principale (2) et les buses auxiliaires (6, 7) débouchent dans une chambre, située juste derrière l'extrémité avant d'un compartiment commun aux buses et pourvue d'une sortie commune aux jets de gaz ou de vapeur sortant de la buse principale et des buses auxiliaires, l'intersection des axes longitudinaux des buses principales et auxiliaires se trouvant à l'extérieur de ladite chambre.
  5. Dispositif selon l'une des revendications 1 à 4 caractérisé par le fait qu'il y trois buses auxiliaires par buse principale.
  6. Dispositif selon l'une des revendications 2 à 5 caractérisé par la disposition de trois buses principales avec chacune trois buses auxiliaires par rapport au compartiment à lit fluidisé (15), les buses principales étant régulièrement réparties sur la circonférence dudit compartiment à lit fluidisé, cylindrique au moins dans la zone du présent dispositif.
  7. Dispositif selon la revendication 6 caractérisé par le fait que trois groupes composés d'une buse principale et de trois buses auxiliaires sont commandables indépendamment les uns des autres.
EP96105333A 1995-04-06 1996-04-03 Dispositif pour broyeur à jet à lit fluidisé Expired - Lifetime EP0736328B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19513034A DE19513034A1 (de) 1995-04-06 1995-04-06 Vorrichtung für die Fließbett-Strahlmahlung
DE19513034 1995-04-06

Publications (2)

Publication Number Publication Date
EP0736328A1 EP0736328A1 (fr) 1996-10-09
EP0736328B1 true EP0736328B1 (fr) 1999-08-18

Family

ID=7759022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96105333A Expired - Lifetime EP0736328B1 (fr) 1995-04-06 1996-04-03 Dispositif pour broyeur à jet à lit fluidisé

Country Status (4)

Country Link
US (1) US5732893A (fr)
EP (1) EP0736328B1 (fr)
DE (2) DE19513034A1 (fr)
ES (1) ES2136911T3 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HRP980257B1 (en) * 1997-05-28 2002-08-31 Messer Griesheim Gmbh Apparatus and method for conducting reactions in fluidized particle layers
AT408797B (de) * 1998-11-11 2002-03-25 Tribovent Verfahrensentwicklg Verfahren zum aufarbeiten von bodenaschen aus verbrennungsanlagen
DE19943670A1 (de) * 1999-09-13 2001-03-15 Roland Nied Verfahren zur Fließbettstrahlmahlung, Vorrichtung zur Durchführung dieses Verfahrens und Anlage mit einer solchen Vorrichtung zur Durchführung dieses Verfahrens
CN1287023A (zh) 1999-09-08 2001-03-14 株式会社威士诺 喷射式粉碎机
US6318649B1 (en) 1999-10-06 2001-11-20 Cornerstone Technologies, Llc Method of creating ultra-fine particles of materials using a high-pressure mill
US20020054995A1 (en) * 1999-10-06 2002-05-09 Marian Mazurkiewicz Graphite platelet nanostructures
US6951312B2 (en) * 2002-07-23 2005-10-04 Xerox Corporation Particle entraining eductor-spike nozzle device for a fluidized bed jet mill
EP1775024A1 (fr) * 2004-07-09 2007-04-18 Sunrex Kogyo Co.,Ltd. Broyeur à jet
JP4645972B2 (ja) * 2005-12-14 2011-03-09 修 廣田 噴射炎バーナー及び炉並びに火炎発生方法
ES2378898T3 (es) 2006-12-14 2012-04-18 Tronox Llc Boquilla de chorro mejorada para uso en un micronizador de molino de chorro
US7959095B2 (en) * 2007-06-27 2011-06-14 E. I. Du Pont De Nemours And Company Center-feed nozzle in a contained cylindrical feed-inlet tube for improved fluid-energy mill grinding efficiency
CN101648154B (zh) * 2009-09-08 2011-06-08 武汉理工大学 多功能流化床气流磨
US9914132B2 (en) * 2011-09-15 2018-03-13 Michael J. Pilgrim Devices, systems, and methods for processing heterogeneous materials
EP2755767A4 (fr) 2011-09-15 2015-07-08 Ablation Technologies Llc Dispositifs, systèmes et procédés de traitement de matériaux hétérogènes
DE102013000426A1 (de) * 2013-01-14 2014-07-17 Roland Nied Verfahren zur Strahlmahlung sowie Strahlmühle dafür
WO2018121803A1 (fr) 2016-12-28 2018-07-05 Houdek Jan Dispositif et procédé de micronisation de matériaux solides
US10889744B2 (en) 2019-04-26 2021-01-12 Signet Aggregates, Llc Clarification of colloidal suspensions

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US238044A (en) * 1881-02-22 luckenbach
US1935344A (en) * 1931-06-16 1933-11-14 American Pulverizing Corp Camd Impact pulverizer
DE598421C (de) * 1932-01-18 1934-06-13 Internat Pulverizing Corp Verfahren und Vorrichtung zum Prallzerkleinern
US2821346A (en) * 1953-04-23 1958-01-28 Majac Inc Injector for impact pulverizer or the like
GB1143678A (fr) * 1965-12-11
DE2040519C2 (de) * 1970-08-14 1984-04-12 Alpine Ag, 8900 Augsburg Fließbettstrahlmühle
DE2628612A1 (de) * 1976-06-25 1977-12-29 Gvnii Zementnoj Promy Niizemen Strahlduese fuer strahlapparate
DE3338138C2 (de) * 1983-10-20 1986-01-16 Alpine Ag, 8900 Augsburg Fließbett-Gegenstrahlmühle
BR8807856A (pt) * 1988-10-21 1990-11-13 Pt I Organizatsii I Teknologii Metodo de processamento de energia fluida em material de fluxo livre e aparelho de materializacao da mesma
DD276628B5 (de) * 1988-11-07 1993-12-02 Zementanlagen Und Maschinenbau Fliessbett-gegenstrahlmuehle
US5542613A (en) * 1992-12-10 1996-08-06 Nied; Roland Process for impact crushing of solid particles
DE4243438C2 (de) * 1992-12-22 1996-06-05 Hosokawa Alpine Ag Verfahren und Vorrichtung zur Fließbett-Strahlmahlung

Also Published As

Publication number Publication date
EP0736328A1 (fr) 1996-10-09
ES2136911T3 (es) 1999-12-01
US5732893A (en) 1998-03-31
DE59602762D1 (de) 1999-09-23
DE19513034A1 (de) 1996-10-10

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