EP1082174A1 - Sechage-broyage de derives de cellulose, notamment de methylcellulose - Google Patents

Sechage-broyage de derives de cellulose, notamment de methylcellulose

Info

Publication number
EP1082174A1
EP1082174A1 EP99924882A EP99924882A EP1082174A1 EP 1082174 A1 EP1082174 A1 EP 1082174A1 EP 99924882 A EP99924882 A EP 99924882A EP 99924882 A EP99924882 A EP 99924882A EP 1082174 A1 EP1082174 A1 EP 1082174A1
Authority
EP
European Patent Office
Prior art keywords
air
product
grinding
vortex mill
fed
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
EP99924882A
Other languages
German (de)
English (en)
Other versions
EP1082174B1 (fr
Inventor
Michael Andreae-Jäckering
Günter WERRY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Altenburger Maschinen Jaeckering GmbH
Original Assignee
Altenburger Maschinen Jaeckering GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Altenburger Maschinen Jaeckering GmbH filed Critical Altenburger Maschinen Jaeckering GmbH
Publication of EP1082174A1 publication Critical patent/EP1082174A1/fr
Application granted granted Critical
Publication of EP1082174B1 publication Critical patent/EP1082174B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Definitions

  • Air whirling mills of the ULTRA-ROTOR type have been used successfully for many years for the grinding or simultaneous grinding and drying of cellulose derivatives.
  • Air vortex mills of this type are known, for example, from EP-A-226 900 and from the "Grinding and Drying Plant” brochure from Altenburger Maschinen KG Jburgering & Co.
  • Cellulose is usually produced and modified in reactors and then enters the next process step as wet cellulose pulp.
  • a free-flowing powder of methyl cellulose was obtained in one step.
  • the bulk density of the cellulose was always of great importance.
  • the cellulose is conveyed in the wet state, moisture content typically 60-70%, but 80% is possible and more, as a wet product, into a cold air stream in the ULTRA-ROTOR.
  • the hot air is first fed into the upper grinding zones and the product is then dried there.
  • water can be injected in the lower area of the rotor. This further increases the bulk weight. The water injection ensures that the product remains sufficiently moist and cool during the grinding phase.
  • Both fine celluloses, grain size 63 to 150 my, as well as coarser celluloses, grain size 200 to 800 my, intended for consumption, can be ground and dried with a high bulk density.
  • FIGS. 1 to 3 each of which shows an air vortex mill 1 with its drive motor 2 in a highly schematic manner.
  • the milled and / or dried product usually passes through such mills 1 from bottom to top. Because of the high flow velocities, the product stays in the mill for only a few seconds (e.g. 1 to 2 seconds).
  • FIG. 1 shows an air vortex mill according to the prior art. Below the lower grinding stage (grinding stages are only shown in Figure 3) their inlet 3. The product leaves the mill through the outlet 4 located above the grinding stages. This outlet 4 is followed only by the devices shown in FIG. 3, usually cyclones, which serve to separate the product from the air flow.
  • FIG. 2 shows an air vortex mill 1 in which the grinding and drying of cellulose derivatives is carried out by the method according to the invention.
  • the product is fed to inlet 3 together with ambient air.
  • the air vortex mill 1 is equipped with an inlet 5. It is located above the product inlet 3 and opens into the mill 1 at a height at which the crushing process takes place. Water can be injected via the inlet 5 in order to keep the product wet and cool during the comminution process.
  • FIG. 3 shows an air vortex mill 1 with seven grinding stages 8. Ambient air and product are supplied to the inlet 3. As indicated by an arrow, product can also be added up to the level of the second grinding stage (inlet 7).
  • the grinding process essentially takes place in the lower and middle region of the mill 1. As already mentioned, it is advisable to inject water at ambient temperature or cooler (e.g. 14 ° C) at the level of the grinding zones in which the crushing takes place, so that the product moisture does not drop below about 70%. In the illustrated embodiment, the injection takes place between the third and fifth grinding stage 8. Two water inlets 5, 5 'can also be provided.
  • the warm or hot air - e.g. with a temperature of 1 80 to 220 ° C - is only supplied at the level of the upper stages (in the illustrated embodiment at the level of the sixth stage).
  • the drying of the product takes place in this area.
  • a residual moisture of less than 5% H20 is aimed for. If this is not achieved in the top two stages, there is the possibility, on the one hand, of increasing the number of stages of the air vortex mill.
  • the residual moisture can be set to the desired level in a dryer of any kind connected to the outlet 4.
  • a dryer 9 connected to the outlet 4 is shown schematically. This is followed by a cyclone system 10 known per se for separating product and air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un procédé de broyage et de séchage de dérivés de cellulose dans un broyeur à remous d'air (1). Le produit à l'état humide est acheminé dans le broyeur à remous d'air (1) où il est broyé fin à froid sous forme de produit humide dans les premières zones de broyage (8) ou dans les zones de broyage (8) inférieures. Ce n'est alors que l'air chaud/très chaud utilisé pour le séchage est acheminé jusqu'à d'autres zones (étages) de broyage, raccordées(és) aux premières(premiers) zones (étages) de broyage.
EP99924882A 1998-05-27 1999-05-05 Sechage-broyage de derives de cellulose, notamment de methylcellulose Expired - Lifetime EP1082174B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19823563 1998-05-27
DE19823563A DE19823563A1 (de) 1998-05-27 1998-05-27 Mahltrocknung von Zellulose-Derivaten, insbesondere Methl-Zellulose
PCT/EP1999/003077 WO1999061157A1 (fr) 1998-05-27 1999-05-05 Sechage-broyage de derives de cellulose, notamment de methylcellulose

Publications (2)

Publication Number Publication Date
EP1082174A1 true EP1082174A1 (fr) 2001-03-14
EP1082174B1 EP1082174B1 (fr) 2002-02-13

Family

ID=7869001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924882A Expired - Lifetime EP1082174B1 (fr) 1998-05-27 1999-05-05 Sechage-broyage de derives de cellulose, notamment de methylcellulose

Country Status (3)

Country Link
EP (1) EP1082174B1 (fr)
DE (2) DE19823563A1 (fr)
WO (1) WO1999061157A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20021758U1 (de) * 2000-12-22 2002-05-08 Sniehotta, Michael, Dipl.-Ing., Dipl.-Geol., 45699 Herten Prallmühle mit Schlagwerkzeugen an einem motorgetriebenen Rotor
DE102005032248B4 (de) * 2005-07-09 2009-04-23 Tronox Pigments Gmbh Titandioxidpigmentherstellung unter Verwendung einer Luftwirbelmühle
DE102006006096A1 (de) * 2006-02-10 2007-08-16 Altenburger Maschinen Jäckering GmbH Vorrichtung und Verfahren zur Einspeisung von feuchten und/oder klebrigen Produkten, insbesondere Zellulose, in einer Luftwirbelmühle
DE102006033791A1 (de) * 2006-07-19 2008-01-24 Prokon Nord Energiesysteme Gmbh Verbesserte Verfahren zur Herstellung von Ethanol, Gluten und und Kleie aus Getreide
DE102010009894A1 (de) 2010-03-02 2011-09-08 Rolf Schatz Rotor-Mahlwerkzeug für Rotorprallmühlen
US9352330B2 (en) 2011-04-06 2016-05-31 Dow Global Technologies Llc Process for producing cellulose derivatives of high bulk density and good flowability
DE102014015964A1 (de) 2014-10-31 2016-06-16 Pallmann Maschinenfabrik Gmbh & Co. Kg Vorrichtung und Verfahren zum Bearbeiten von Aufgabegut
DE102022132971A1 (de) * 2022-12-12 2024-06-13 PWA recycling concept GmbH Vorrichtung zum Zerkleinern und/oder Aufbereiten von Material, Anordnung und Verfahren
DE102024122725A1 (de) 2024-08-08 2026-02-12 Solid Plant GmbH Verstärkungs- und/oder Füllmaterial auf der Basis von Hanfpartikeln

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3839831A1 (de) * 1988-11-25 1990-05-31 Hoechst Ag Verfahren und vorrichtung zur produktschonenden mahlung und gleichzeitigen trocknung von feuchten celluloseethern
DE19641781A1 (de) * 1996-10-10 1998-04-16 Clariant Gmbh Verfahren und Vorrichtung zum gleichzeitigen Mahlen und Trocknen eines feuchten Celluloseether enthaltenden Mahlgutes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9961157A1 *

Also Published As

Publication number Publication date
DE19823563A1 (de) 1999-12-02
EP1082174B1 (fr) 2002-02-13
WO1999061157A1 (fr) 1999-12-02
DE59900869D1 (de) 2002-03-21

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