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EP0736328A1 - 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
EP0736328A1
EP0736328A1 EP96105333A EP96105333A EP0736328A1 EP 0736328 A1 EP0736328 A1 EP 0736328A1 EP 96105333 A EP96105333 A EP 96105333A EP 96105333 A EP96105333 A EP 96105333A EP 0736328 A1 EP0736328 A1 EP 0736328A1
Authority
EP
European Patent Office
Prior art keywords
jet
main
nozzle
main nozzle
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.)
Granted
Application number
EP96105333A
Other languages
German (de)
English (en)
Other versions
EP0736328B1 (fr
Inventor
Roland Dr.-Ing. Nied
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0736328A1 publication Critical patent/EP0736328A1/fr
Application granted granted Critical
Publication of EP0736328B1 publication Critical patent/EP0736328B1/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
    • B02C19/06—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 jet of steam or preferably gas is introduced at high speed into a fluidized bed of fluidized solid particles by means of a nozzle.
  • a negative pressure prevails in the jet, which is why solid particles are sucked into the jet from the fluid bed.
  • the jet the sucked solid particles are accelerated to the high speed of the gas jet.
  • the momentum exchange between the solid particles necessary for the comminution of the solid particles takes place.
  • the velocity and therefore vacuum pressure distribution in the gas jet is the reason why the particle distribution over the jet cross-section is uneven such that the vast majority of the sucked solid particles remain in the edge area of the gas jet and relatively few particles are carried in the core area of the gas jet.
  • the energy of the gas jet is used insufficiently for impact crushing. This is perceived as unsatisfactory if the impact crushing takes place solely through the exchange of energy between the particles in the gas jet, but also if the impact crushing within the gas jet takes place only afterwards by the fact that the solid particles suspended and partially crushed in the gas jet are subjected to high energy be brought into contact with a fixed baffle.
  • DE-PS 598 421 For the known impact crushing by means of a steam or gas jet introduced into a fluidized bed, reference can be made, for example, to DE-PS 598 421.
  • the fluidized bed counter jet mill known from DE 33 38 138 C2 is concerned with the aim that more solid particles from the gas jet entering the fluidized bed Fluid bed can be included.
  • a plurality of further jet nozzles are arranged concentrically around a nozzle opening into the grinding chamber or the material bed in such a way that the longitudinal axes of the gas jets from the central main nozzle and the further jet nozzles arranged concentrically thereto are at one point on the longitudinal axis cut the jet of the main nozzle.
  • this solution is to whirl up the material bed in the outlet area of the main nozzle and thus to improve the uptake of solid particles from the fluidized bed by the gas jet emerging from the main nozzle, in that the gas jet from the main nozzle takes up more solid particles from the swirled material bed than it does with non-swirled material beds it is possible.
  • a device which is characterized by a nozzle element for jet generation which can be inserted into a holder and which has at least two outlet openings of different shape and size which are uniformly distributed over the cross section of the nozzle element is provided. Problems can be expected from this solution if very different operating conditions are to be taken into account.
  • the present invention is now concerned with the problem of uniformizing the distribution of the solid particles in a gas jet which enters a fluidized bed in such a way that it picks up from this solid particle as it enters the fluidized bed.
  • the invention is based in particular on the state of the art according to DE 42 43 438 A1 and DE-OS 20 40 519 and aims to ensure that solid particles taken up by the gas jet from the fluidized bed also reach the core area of the gas jet.
  • the object of the present invention is therefore to design a device such that the particle distribution in a gas jet introduced with high energy into a fluid bed of a fluid bed jet mill over the jet cross section and in particular the loading of this gas jet with solid particles from the fluid bed also in the jet core area with simple and reliable acting Means better than it has been achieved so far.
  • a main nozzle 2 is arranged in a nozzle housing 1, in which a gas jet supplied through the feed 3 is strongly 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 denoted by 5.
  • Two auxiliary nozzles 6, 7 provided according to the invention are assigned to the main nozzle 2 offset by 180 ° relative to one another such that the angles between the longitudinal axis 5 of the main nozzle 2 or the gas or steam jet 4 emerging from the main nozzle and each of the longitudinal axes 8, 9 of the auxiliary nozzles 6, 7 or the auxiliary jets 10, 11 emerging from them, which consist of the same gas or steam as 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 pass through a common chamber 12 in the front side of the nozzle housing 1, which is open in the jet direction, into the material bed 13.
  • each of these nozzle assemblies is a nozzle assembly according to FIG. 1.
  • Three main jets 5 are formed, each of these main jets are assigned at least two, optimally three auxiliary jets corresponding to the two auxiliary jets 10, 11, and the three grinding jets formed in this way each have a main jet and auxiliary beams assigned to it meet in a union region and around the center 14 of the cylindrical housing 15.
  • a separation 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 into each other and the particles are largely evenly distributed in all three gas jets across their cross sections.
  • the housing 15 is a relatively short cylindrical drum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Disintegrating Or Milling (AREA)
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 true EP0736328A1 (fr) 1996-10-09
EP0736328B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6196482B1 (en) 1999-09-08 2001-03-06 Vishnu Co., Ltd. Jet mill
AT408797B (de) * 1998-11-11 2002-03-25 Tribovent Verfahrensentwicklg Verfahren zum aufarbeiten von bodenaschen aus verbrennungsanlagen

Families Citing this family (16)

* 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
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
US20020054995A1 (en) * 1999-10-06 2002-05-09 Marian Mazurkiewicz Graphite platelet nanostructures
US6318649B1 (en) 1999-10-06 2001-11-20 Cornerstone Technologies, Llc Method of creating ultra-fine particles of materials using a high-pressure mill
US6951312B2 (en) * 2002-07-23 2005-10-04 Xerox Corporation Particle entraining eductor-spike nozzle device for a fluidized bed jet mill
WO2006006291A1 (fr) * 2004-07-09 2006-01-19 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
CN101631622B (zh) 2006-12-14 2013-04-24 特罗诺克斯有限公司 用于射流微粉磨机的改进射流喷嘴
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
CA2848381C (fr) 2011-09-15 2020-01-14 Ablation Technologies, Llc Dispositifs, systemes et procedes de traitement de materiaux heterogenes
DE102013000426A1 (de) * 2013-01-14 2014-07-17 Roland Nied Verfahren zur Strahlmahlung sowie Strahlmühle dafür
EP3393669B1 (fr) 2016-12-28 2019-09-18 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
KR102362705B1 (ko) * 2021-10-28 2022-02-14 신윤호 다단 캠핑하우스

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628612A1 (de) * 1976-06-25 1977-12-29 Gvnii Zementnoj Promy Niizemen Strahlduese fuer strahlapparate
DE3338138A1 (de) * 1983-10-20 1985-05-09 Alpine Ag, 8900 Augsburg Fliessbett-gegenstrahlmuehle

Family Cites Families (10)

* 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
DE3891421T1 (de) * 1988-10-21 1990-11-22 Pt I Organizacii I Technologii Verfahren zur gasstrahlbehandlung von schuettgut und gasstrahlanlage fuer dessen durchfuehrung
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628612A1 (de) * 1976-06-25 1977-12-29 Gvnii Zementnoj Promy Niizemen Strahlduese fuer strahlapparate
DE3338138A1 (de) * 1983-10-20 1985-05-09 Alpine Ag, 8900 Augsburg Fliessbett-gegenstrahlmuehle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408797B (de) * 1998-11-11 2002-03-25 Tribovent Verfahrensentwicklg Verfahren zum aufarbeiten von bodenaschen aus verbrennungsanlagen
US6196482B1 (en) 1999-09-08 2001-03-06 Vishnu Co., Ltd. Jet mill
SG80073A1 (en) * 1999-09-08 2001-04-17 Vishnu Co Ltd Jet mill

Also Published As

Publication number Publication date
ES2136911T3 (es) 1999-12-01
EP0736328B1 (fr) 1999-08-18
US5732893A (en) 1998-03-31
DE19513034A1 (de) 1996-10-10
DE59602762D1 (de) 1999-09-23

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