DE19823563A1 - Mill drying of cellulose derivatives, especially methyl cellulose - Google Patents
Mill drying of cellulose derivatives, especially methyl celluloseInfo
- Publication number
- DE19823563A1 DE19823563A1 DE19823563A DE19823563A DE19823563A1 DE 19823563 A1 DE19823563 A1 DE 19823563A1 DE 19823563 A DE19823563 A DE 19823563A DE 19823563 A DE19823563 A DE 19823563A DE 19823563 A1 DE19823563 A1 DE 19823563A1
- Authority
- DE
- Germany
- Prior art keywords
- cellulose
- drying
- product
- stages
- grinding
- 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.)
- Withdrawn
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
-
- 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
-
- 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
- B02C23/26—Passing gas through crushing or disintegrating zone characterised by point of gas entry or exit or by gas flow path
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Für die Vermahlung bzw. gleichzeitige Mahlung und Trocknung von Zellulose-Derivaten werden Luftwirbelmühlen vom Typ ULTRA- ROTOR seit vielen Jahren erfolgreich eingesetzt.For grinding or simultaneous grinding and drying of Cellulose derivatives are ULTRA- ROTOR has been used successfully for many years.
Zellulose wird üblicherweise in Reaktoren hergestellt und modifiziert und kommt dann als nasse Zellulose-Pulpe in den nächsten Verfahrens schritt.Cellulose is usually produced and modified in reactors and then comes as wet cellulose pulp in the next process step.
Hier wurde früher die Zellulose mit konventionellen Methoden getrock net und anschließend oder vorher auf Kugelmühlen mit hohem Aufwand zerkleinert.In the past, cellulose was dried using conventional methods net and then or beforehand on ball mills with great effort crushed.
Auch andere Verfahrenstechniken wurden eingesetzt.Other process technologies have also been used.
In den letzten Jahren wurden mehr und mehr Mahltrocknungsanlagen vom Typ ULTRA-ROTOR für die gleichzeitige Mahlung und Trocknung von Zellulose, insbesondere Methyl-Zellulose (MC) eingesetzt.In recent years there have been more and more grinding drying plants ULTRA-ROTOR type for simultaneous grinding and drying of cellulose, especially methyl cellulose (MC) used.
Hierbei erreichte man in einem Arbeitsschritt ein rieselfähiges Pulver von Methyl-Zellulose.A free-flowing powder was obtained in one step of methyl cellulose.
Neben anderen wichtigen Eigenschaften (z. B. Korngröße, Restfeuchte, Rieselfähigkeit) war immer wieder das Schüttgewicht der Zellulose von großer Bedeutung.In addition to other important properties (e.g. grain size, residual moisture, Free flowing) was the bulk density of the cellulose from great importance.
Üblicherweise erreichte man Schüttgewichte zwischen 200 und 300 g pro Liter.Bulk weights between 200 and 300 g were usually achieved per liter.
Bestimmte Anwender suchten jedoch immer nach Wegen, ein höheres Schüttgewicht für die Zellulose zu erreichen.However, certain users always looked for ways, a higher one To achieve bulk density for the cellulose.
Bisher wurde Heißluft in den ULTRA-ROTOR gefördert und das Pro dukt wurde in den Heißluftstrom dosiert und gleichzeitig gemahlen und getrocknet, wie viele andere Produkte.So far, hot air has been fed into the ULTRA-ROTOR and the Pro product was dosed into the hot air flow and simultaneously ground and dried like many other products.
Überraschenderweise haben wir jetzt folgendes andere Verfahren ent
wickelt:
Die Zellulose wird im nassen Zustand, Feuchtigkeitsgehalt typischer
weise 60-70%, jedoch auch 80% sind möglich und mehr, als nasses
Produkt in einen Kaltluftstrom in den ULTRA-ROTOR gefördert.Surprisingly, we have now developed the following other procedure:
The cellulose is conveyed in the wet state, moisture content typically 60-70%, but also 80% is possible and more as a wet product in a cold air stream in the ULTRA-ROTOR.
In den unteren Mahlzonen wird das Produkt dann als nasses Produkt kalt (kalt = Umgebungsluft oder gekühlte Luft, z. B. mit Stickstoff oder CO2 gekühlt) feingemahlen, die Heißluft wird erst in den oberen Mahlzonen zugeführt und das Produkt dort dann getrocknet (siehe Skizze).The product then becomes cold as a wet product in the lower grinding zones (cold = ambient air or cooled air, e.g. with nitrogen or CO2 cooled) finely ground, the hot air is only in the upper grinding zones fed and then dried the product there (see sketch).
Durch diese Anordnung erreicht man Schüttgewichte, die deutlich über den bisher erreichten Schüttgewichten liegen und zwischen 300, 400 oder sogar mehr Gramm pro Liter liegen. With this arrangement, bulk densities are achieved that are significantly higher the bulk densities achieved so far are between 300 and 400 or even more grams per liter.
Zusätzlich kann im unteren Bereich des Rotors Wasser eingedüst wer den. Hiermit wird das Schüttgewicht weiter gesteigert.In addition, water can be injected in the lower area of the rotor the. This further increases the bulk weight.
Dieses höhere Schüttgewicht ist von enormer kommerzieller und techni scher Bedeutung.This higher bulk density is of enormous commercial and technical importance.
Sowohl feine Zellulosen, Korngröße 63 bis 150 my, als auch gröbere, eher für den Konsumbereich bestimmte Zellulosen, Korngröße 200 bis 800 my, können so gemahlen und getrocknet werden bei hohem Schütt gewicht.Both fine cellulose, grain size 63 to 150 my, and coarser, celluloses, grain size 200 to 800 my, can be ground and dried with a high bulk Weight.
Sollte die gewünschte Restfeuchte nicht erreicht werden, kann in einem nachgeschalteten Trockner jedweder Art die Restfeuchte auf den ge wünschten Grad eingestellt werden.If the desired residual moisture is not reached, it can be done in one downstream dryer of any kind the residual moisture on the ge desired degree can be set.
Claims (2)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823563A DE19823563A1 (en) | 1998-05-27 | 1998-05-27 | Mill drying of cellulose derivatives, especially methyl cellulose |
EP99924882A EP1082174B1 (en) | 1998-05-27 | 1999-05-05 | Mill drying of cellulose derivatives, especially methylcellulose |
DE59900869T DE59900869D1 (en) | 1998-05-27 | 1999-05-05 | GRIND DRYING OF CELLULOSE DERIVATIVES, IN PARTICULAR METHYL CELLULOSE |
PCT/EP1999/003077 WO1999061157A1 (en) | 1998-05-27 | 1999-05-05 | Mill drying of cellulose derivatives, especially methylcellulose |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823563A DE19823563A1 (en) | 1998-05-27 | 1998-05-27 | Mill drying of cellulose derivatives, especially methyl cellulose |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19823563A1 true DE19823563A1 (en) | 1999-12-02 |
Family
ID=7869001
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823563A Withdrawn DE19823563A1 (en) | 1998-05-27 | 1998-05-27 | Mill drying of cellulose derivatives, especially methyl cellulose |
DE59900869T Expired - Lifetime DE59900869D1 (en) | 1998-05-27 | 1999-05-05 | GRIND DRYING OF CELLULOSE DERIVATIVES, IN PARTICULAR METHYL CELLULOSE |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE59900869T Expired - Lifetime DE59900869D1 (en) | 1998-05-27 | 1999-05-05 | GRIND DRYING OF CELLULOSE DERIVATIVES, IN PARTICULAR METHYL CELLULOSE |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1082174B1 (en) |
DE (2) | DE19823563A1 (en) |
WO (1) | WO1999061157A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007006456A2 (en) * | 2005-07-09 | 2007-01-18 | Tronox Pigments Gmbh | Production of titanium dioxide pigments using an air vortex mill |
DE10161275B4 (en) * | 2000-12-22 | 2013-01-03 | Michael Sniehotta | Rotor impact mill for the treatment of regrind |
EP3015171A2 (en) | 2014-10-31 | 2016-05-04 | Pallmann Maschinenfabrik GmbH & Co. KG | Method and device for processing feedstock |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006006096A1 (en) * | 2006-02-10 | 2007-08-16 | Altenburger Maschinen Jäckering GmbH | Apparatus and method for feeding moist and / or sticky products, in particular cellulose, in an air vortex mill |
DE102006033791A1 (en) * | 2006-07-19 | 2008-01-24 | Prokon Nord Energiesysteme Gmbh | Improved processes for the production of ethanol, gluten and bran from cereals |
DE102010009894A1 (en) | 2010-03-02 | 2011-09-08 | Rolf Schatz | Rotor grinding tool for use in rotor impact mills for fine grinding, drying or grind drying, coating or deagglomeration of wet or dry material, has integrated turbo wheel-air classifier |
DE102022132971A1 (en) | 2022-12-12 | 2024-06-13 | PWA recycling concept GmbH | Device for crushing and/or processing material, arrangement and method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3543370A1 (en) * | 1985-12-07 | 1987-06-11 | Jackering Altenburger Masch | MILL WITH SEVERAL GRINDINGS |
DE3811910C2 (en) * | 1988-04-09 | 1997-04-10 | Mahltechnik Goergens Gmbh | Mill and method for grinding and drying a moist product simultaneously |
DE3839831A1 (en) * | 1988-11-25 | 1990-05-31 | Hoechst Ag | METHOD AND DEVICE FOR PRODUCT-FRIENDLY GRINDING AND SIMULTANEOUS DRYING OF DAMP CELLULOSE ETHERS |
DE19641781A1 (en) * | 1996-10-10 | 1998-04-16 | Clariant Gmbh | Method and device for the simultaneous grinding and drying of a ground material containing moist cellulose ether |
-
1998
- 1998-05-27 DE DE19823563A patent/DE19823563A1/en not_active Withdrawn
-
1999
- 1999-05-05 DE DE59900869T patent/DE59900869D1/en not_active Expired - Lifetime
- 1999-05-05 EP EP99924882A patent/EP1082174B1/en not_active Expired - Lifetime
- 1999-05-05 WO PCT/EP1999/003077 patent/WO1999061157A1/en active IP Right Grant
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10161275B4 (en) * | 2000-12-22 | 2013-01-03 | Michael Sniehotta | Rotor impact mill for the treatment of regrind |
WO2007006456A2 (en) * | 2005-07-09 | 2007-01-18 | Tronox Pigments Gmbh | Production of titanium dioxide pigments using an air vortex mill |
WO2007006456A3 (en) * | 2005-07-09 | 2007-05-24 | Tronox Pigments Gmbh | Production of titanium dioxide pigments using an air vortex mill |
EP3015171A2 (en) | 2014-10-31 | 2016-05-04 | Pallmann Maschinenfabrik GmbH & Co. KG | Method and device for processing feedstock |
DE102014015964A1 (en) | 2014-10-31 | 2016-06-16 | Pallmann Maschinenfabrik Gmbh & Co. Kg | Apparatus and method for processing feedstock |
US11090658B2 (en) | 2014-10-31 | 2021-08-17 | Pallmann Maschinenfabrik Gmbh & Co. Kg | Device and method for processing of feed material |
Also Published As
Publication number | Publication date |
---|---|
EP1082174B1 (en) | 2002-02-13 |
EP1082174A1 (en) | 2001-03-14 |
WO1999061157A1 (en) | 1999-12-02 |
DE59900869D1 (en) | 2002-03-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |