EP1015117A1 - Mikrowirbelmühle und verfahren zum trocknen und desagglomerieren von pulverförmigen materialien - Google Patents
Mikrowirbelmühle und verfahren zum trocknen und desagglomerieren von pulverförmigen materialienInfo
- Publication number
- EP1015117A1 EP1015117A1 EP98921494A EP98921494A EP1015117A1 EP 1015117 A1 EP1015117 A1 EP 1015117A1 EP 98921494 A EP98921494 A EP 98921494A EP 98921494 A EP98921494 A EP 98921494A EP 1015117 A1 EP1015117 A1 EP 1015117A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jet
- vortex mill
- micro
- deagglomerating
- rotor
- 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
Links
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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/286—Feeding or discharge
-
- 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
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/28—Passing gas through crushing or disintegrating zone gas moving means being integral with, or attached to, crushing or disintegrating element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C2013/145—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with fast rotating vanes generating vortexes effecting material on material impact
Definitions
- the present invention relates to a micro vortex mill for drying and deagglomerating powdery material.
- Such mills are known for example from EP-A 226 900. They are available under the name "Ultra-Rotor '" from Altenburger Maschinen KG Jburgering & Co in D-4700 Hamm.
- Such mills consist of a stator in the form of a cylindrical housing, in which a rotor is axially arranged, which rotor can be driven several on a common
- Axis has circular disks arranged one above the other, the circular disks on their circumference having a multiplicity of grinding plates arranged essentially radially and parallel to the rotor axis, which protrude beyond the circular disks, with a small gap which is larger than the diameter of the particles of the material to be ground or disagglomerating goods.
- hot gas is injected into the first circular disk.
- a micro-vortex mill is introduced and a discharge device is arranged above the last circular disk, which can be in the form of a fan.
- Rotating sighting rods can also be provided between the last circular disc and the discharge device, by means of which separation and recycling of particles which have not yet been comminuted sufficiently takes place.
- the pulverulent material to be dried, deagglomerated or ground is usually introduced by means of an entry screw through the cylindrical stator at the level of the first circular disk, i.e. the first grinding stage.
- a disadvantage of this type of entry is that the rotor is entered on one side
- the load is asymmetrical, which can be determined for the rotor by irregular current consumption peaks of the drive motor.
- the asymmetrical loading of the grinding plates leads to increased wear on the mill.
- This proposal is that the regrind before fluidization in the radial fan with hot parts of the mill comes into contact, causing incrustations and caking
- the present invention relates to a micro-vortex mill for drying and deagglomerating powdery material of the type described at the beginning, with which
- the entry device for the good is in the form of a suction lamp.
- Such conveying elements are also known as jet pumps, see e.g. Chemical Engineering 51 (1979), 867-877 and Chemical Engineering 54 (1982), 8-16. These consist of a driving nozzle arranged in a housing serving as an intake space, which generates a driving jet. The medium to be pumped is introduced into the housing and carried along by the driving jet. A mixing tube with an essentially constant cross section and a diffuser are connected axially to the driving jet nozzle.
- the jet suction device preferably opens between the first and two
- the axis of the jet suction device can be arranged radially to the rotor axis.
- the introduction preferably takes place tangentially in the cylinder space defined by the stator.
- air, nitrogen or another inert gas can be used as the propellant for the propellant jet, but superheated steam is preferably used, for example at a pressure between 2 and 4 bar.
- the material to be dried and disagglomerated is preferably used in the form of a slurry, particularly preferably in the form of an aqueous slurry.
- the water content of the aqueous slurry can be 50 to 80% by weight.
- the mass flow ratio of propellant jet and powdery material or slurry is preferably 0.20 to 0.5, particularly preferably 0.25 to 0.35.
- thixotropic slurries such as organic and inorganic sludges, viscous and sticky solids, etc. can be dried and deagglomerated or ground.
- the entry by means of a suction jet takes place in a completely fluidized state, so that the rotor or the grinding plates are stressed Current consumption peaks of the drive motor for the rotor are no longer observed when the material is introduced by means of a jet suction device. This speaks for a smooth running of the rotor which is gentle on both the mill and the material to be ground
- Micro-vortex mill 1 which consists of the cylindrical stator 2 and circular disks 4 arranged on the rotor axis 3 and grinding plates 5 fastened to the circular disks 4.
- each of the circular disks 4 can have 20 to 60 grinding plates 5 distributed over the circumference.
- the rotor axis 3 is driven by means of a V-belt 6 by an electric motor at a speed of 2,000 to 3,000 rpm
- the hot gas inlet 8 Below the first circular disk 4 1 is the hot gas inlet 8, above the last circular disk 4.5 is the discharge member for the fluidized, dried and deagglomerated material in the gas, which is designed in the form of a fan wheel 9 and disagglomerating goods by means of a suction jet 10, which comes from a propulsion jet nozzle
- a suction nozzle 12 for the supply of the material to be dried and a mixing tube 13 and a diffuser 14
- the fluidized, dried and deagglomerated particles in the carrier gas, which are discharged from the micro-vortex mill, can be separated from the carrier gas in a known manner in a cyclone separator
- Temperature of the hot gas supplied at 8 is such that the temperature at Discharge 9 from the micro-vortex mill is above the dew point of the liquids from which it is dried, ie in the case of water above 110 ° C.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19719840 | 1997-05-12 | ||
DE19719840A DE19719840A1 (de) | 1997-05-12 | 1997-05-12 | Mikrowirbelmühle und Verfahren zum Trocknen und Desagglomerieren von pulverförmigen Materialien |
PCT/EP1998/002512 WO1998051413A1 (de) | 1997-05-12 | 1998-04-29 | Mikrowirbelmühle und verfahren zum trocknen und desagglomerieren von pulverförmigen materialien |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1015117A1 true EP1015117A1 (de) | 2000-07-05 |
EP1015117B1 EP1015117B1 (de) | 2003-02-12 |
Family
ID=7829227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98921494A Expired - Lifetime EP1015117B1 (de) | 1997-05-12 | 1998-04-29 | Mikrowirbelmühle und verfahren zum trocknen und desagglomerieren von pulverförmigen materialien |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1015117B1 (de) |
DE (2) | DE19719840A1 (de) |
WO (1) | WO1998051413A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7445806B2 (en) | 2004-09-02 | 2008-11-04 | Kraft Foods Global Brands Llc | Process for selective grinding and recovery of dual-density foods |
GB2482032B (en) | 2010-07-16 | 2013-04-10 | Kraft Foods R & D Inc | Coffee products and related processes |
TW201446329A (zh) | 2013-03-11 | 2014-12-16 | 道達爾研究及技術弗呂公司 | 用噴射磨製造形態優化的細顆粒的方法、用於該方法的噴射磨和所製造的顆粒 |
CN107262257B (zh) * | 2017-07-15 | 2023-08-01 | 山西三元炭素有限责任公司 | 一种磨 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3348779A (en) * | 1964-10-02 | 1967-10-24 | Norwood H Andrews | Method and apparatus for comminuting materials |
US4504017A (en) * | 1983-06-08 | 1985-03-12 | Norandy, Incorporated | Apparatus for comminuting materials to extremely fine size using a circulating stream jet mill and a discrete but interconnected and interdependent rotating anvil-jet impact mill |
DE3543370A1 (de) * | 1985-12-07 | 1987-06-11 | Jackering Altenburger Masch | Muehle mit mehreren mahlstufen |
DE3811910C2 (de) * | 1988-04-09 | 1997-04-10 | Mahltechnik Goergens Gmbh | Mühle und Verfahren zum gleichzeitigen Mahlen und Trocknen eines feuchten Produkts |
DE29515434U1 (de) * | 1995-09-27 | 1995-11-23 | Mahltechnik Goergens Gmbh | Micro-Wirbel-Mühle |
DE19611112C2 (de) * | 1996-03-21 | 2002-04-18 | Jackering Altenburger Masch | Verfahren und Vorrichtung zur Herstellung von extrem feinen Pulvern |
-
1997
- 1997-05-12 DE DE19719840A patent/DE19719840A1/de not_active Withdrawn
-
1998
- 1998-04-29 WO PCT/EP1998/002512 patent/WO1998051413A1/de active IP Right Grant
- 1998-04-29 DE DE59807202T patent/DE59807202D1/de not_active Expired - Fee Related
- 1998-04-29 EP EP98921494A patent/EP1015117B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9851413A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998051413A1 (de) | 1998-11-19 |
DE59807202D1 (de) | 2003-03-20 |
DE19719840A1 (de) | 1998-11-19 |
EP1015117B1 (de) | 2003-02-12 |
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