EP0736328B1 - Vorrichtung für die Fliessbett-Strahlmahlung - Google Patents
Vorrichtung für die Fliessbett-Strahlmahlung Download PDFInfo
- 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
Links
- 239000002245 particle Substances 0.000 claims description 38
- 239000007787 solid Substances 0.000 claims description 26
- 238000000227 grinding Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000005422 blasting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010902 jet-milling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Disintegrating Or Milling (AREA)
Description
- Fig. 1
- einen Mittellängsschnitt durch ein Aggregat mit erfindungsgemäß einer Hauptdüse und zwei Hilfsdüsen und
- Fig. 2
- ein zylindrisches Fließbettgehäuse mit drei erfindungsgemäßen Aggregaten gemäß Fig. 1, die dem Gehäuse umfangssymmetrisch zugeordnet sind, d.h. in Umfangsrichtung des Gehäuses gleiche Abstände voneinander haben.
Claims (7)
- Vorrichtung für die Fließbett-Strahlmahlung, bei der ein aus einer Düse austretender Gas- oder Dampfstrahl hoher Geschwindigkeit in ein fluidisiertes Bett eingebracht wird, um in ihm Feststoffpartikel ausdem Fließbett einzusaugen und Mittel vorgesehen sind, um die Partikelverteilung über den Gas- oder Dampfstrahlquerschnitt zu vergleichmäßigen, dadurch gekennzeichnet, daß die Mittel zur Vergleichmäßigung der Partikelverteilung über den Strahlquerschnitt Hilfsdüsen (6, 7) in der Zuordnung zu einer Hauptdüse (29 derart sind, daß die Strahlauslaßrichtung der Hilfsdüse schräg zur Strahlauslaßrichtung (5) der Hauptdüse gerichtet ist derart, daß die Hilfsstrahlen in den Hauptstrahl eindringen unmittelbar, nachdem dieser die Hauptdüse verlassen hat.
- Vorrichtung nach Anspruch 1 , gekennzeichnet durch die Zuordnung von drei Hilfsdüsen zu einer Hauptdüse (2), wobei die Hilfsdüsen gleichmäßig beabstandet um die Hauptdüse (2) herum angeordnet sind, die Austrittsöffnungen der Hauptdüse und der Hilfsdüsen in einer Ebene liegen und die Strahlachse (8, 9) jeder der Hilfsdüsen die Strahlachse (5) der Hauptdüse unter einem Winkel im Bereich von 5° bis 60° schneidet.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Winkelbereich 25° bis 45° beträgt.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Hauptdüse (2) und die Hilfsdüsen (6, 7) in eine Kammer münden, die unmittelbar hinter dem vorderen Ende eines gemeinsamen Düsengehäuses liegt und die einen gemeinsamen Auslaß für die Gas- bzw. Dampfstrahlen von Haupt- und Hilfsdüsen aufweist, wobei der Schnittpunkt der Längsachsen von Haupt- und Hilfsdüsen außerhalb der Kammer liegt.
- Vorrichtung nach einem der Ansprüche 1 bis 4, gekennzeichnet durch drei Hilfsdüsen für eine Hauptdüse.
- Vorrichtung nach einem der Ansprüche 2 bis 5, gekennzeichnet durch die in Umfangsrichtung gleichmäßig beabstandete Zuordnung von drei Hauptdüsen mit je drei Hilfsdüsen zu dem zumindest im Bereich der Vorrichtung zylindrischen Fließbettgehäuse (15).
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß drei Aggregate aus einer Hauptdüse und drei Hilfsdüsen unabhängig voneinander steuerbar sind.
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 (de) | 1996-10-09 |
EP0736328B1 true EP0736328B1 (de) | 1999-08-18 |
Family
ID=7759022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96105333A Expired - Lifetime EP0736328B1 (de) | 1995-04-06 | 1996-04-03 | Vorrichtung für die Fliessbett-Strahlmahlung |
Country Status (4)
Country | Link |
---|---|
US (1) | US5732893A (de) |
EP (1) | EP0736328B1 (de) |
DE (2) | DE19513034A1 (de) |
ES (1) | ES2136911T3 (de) |
Families Citing this family (17)
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 |
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 |
US7850105B2 (en) * | 2004-07-09 | 2010-12-14 | Sunrex Kogyo Co., Ltd. | Jet mill |
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 |
JP5087636B2 (ja) | 2006-12-14 | 2012-12-05 | トロノックス エルエルシー | ジェットミル微粉化装置で使用される改良ジェット |
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 |
AU2012308559B2 (en) | 2011-09-15 | 2014-11-06 | Disa Technologies, Inc. | Devices, systems, and methods for processing heterogeneous materials |
DE102013000426A1 (de) * | 2013-01-14 | 2014-07-17 | Roland Nied | Verfahren zur Strahlmahlung sowie Strahlmühle dafür |
WO2018121803A1 (en) | 2016-12-28 | 2018-07-05 | Houdek Jan | Device and method for micronization of solid materials |
US10889744B2 (en) | 2019-04-26 | 2021-01-12 | Signet Aggregates, Llc | Clarification of colloidal suspensions |
Family Cites Families (12)
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 (de) * | 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 |
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 |
-
1995
- 1995-04-06 DE DE19513034A patent/DE19513034A1/de not_active Withdrawn
-
1996
- 1996-03-21 US US08/619,197 patent/US5732893A/en not_active Expired - Lifetime
- 1996-04-03 ES ES96105333T patent/ES2136911T3/es not_active Expired - Lifetime
- 1996-04-03 EP EP96105333A patent/EP0736328B1/de not_active Expired - Lifetime
- 1996-04-03 DE DE59602762T patent/DE59602762D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59602762D1 (de) | 1999-09-23 |
DE19513034A1 (de) | 1996-10-10 |
ES2136911T3 (es) | 1999-12-01 |
US5732893A (en) | 1998-03-31 |
EP0736328A1 (de) | 1996-10-09 |
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