WO1996038625A1 - Process and plant for crushing a cellulose material - Google Patents
Process and plant for crushing a cellulose material Download PDFInfo
- Publication number
- WO1996038625A1 WO1996038625A1 PCT/AT1996/000064 AT9600064W WO9638625A1 WO 1996038625 A1 WO1996038625 A1 WO 1996038625A1 AT 9600064 W AT9600064 W AT 9600064W WO 9638625 A1 WO9638625 A1 WO 9638625A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cellulose
- cellulosic material
- comminuted
- pulp
- crushing
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title claims abstract description 35
- 239000001913 cellulose Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims description 8
- 150000003512 tertiary amines Chemical class 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 7
- 150000001412 amines Chemical class 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- LFTLOKWAGJYHHR-UHFFFAOYSA-N N-methylmorpholine N-oxide Chemical compound CN1(=O)CCOCC1 LFTLOKWAGJYHHR-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000875 Dissolving pulp Polymers 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001212 derivatisation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/066—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being pulp sheets
Definitions
- the invention relates to a method and a plant for comminuting a cellulosic material, in particular for comminuting pulp.
- NMMO N-Methylmorpholine-N-oxide
- Other amine oxides are e.g. in EP-A - 0 553 070.
- a method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419.
- the production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
- EP-A-0 356 419 describes an amine oxide process for producing spinnable cellulose solutions, which uses, among other things, a suspension of cellulose in liquid, aqueous N-methylmorpholine-N-oxide (NMMO) as the starting material.
- NMMO N-methylmorpholine-N-oxide
- This method consists in the suspension being continuously and continuously converted into a moldable solution in a thin-film treatment apparatus.
- the moldable solution is finally spun in a molding tool, for example a spinneret, into filaments which are passed through a precipitation bath.
- a suspension of cellulose in the aqueous, tertiary amine oxide serves as the starting material for the production of the moldable cellulose solution.
- This suspension is produced by crushing cellulose and introducing it into the aqueous amine oxide solution in a mixer.
- WO 94/28217 discloses a process for producing a premix based on comminuted cellulose, from which a moldable cellulose solution can be produced.
- Cellulose in roll form serves as the starting material.
- the pulp is comminuted in a cutting device, and the comminuted pulp is blown by air into a pulp separator in which the comminuted pulp is separated into two fractions: a first fraction, which has a particle size of at most 2.54 mm, and one Dust fraction.
- the dust fraction is entrained by the conveying air and only separated from it in a filter.
- the filtered dust fraction is then combined again with the first fraction and used to produce the cellulose suspension.
- the object of the invention is therefore to provide a method and a system with which the disadvantages mentioned above can be overcome.
- the cellulosic material is pre-crushed to form particles of different size fractions
- the particles formed in the pre-comminution are transported without separation of any size fraction to a device in which the particles are further comminuted.
- the particles formed in the pre-comminution are best transported using a gas.
- the process according to the invention is preferably carried out continuously.
- the process according to the invention can advantageously be used to form a comminuted cellulosic material which is particularly suitable for the preparation of a suspension of cellulose in an aqueous tertiary amine oxide for the amine oxide process.
- the invention also relates to a plant for carrying out the method according to the invention, which plant is characterized by the following features:
- a conveying line for pre-comminuted cellulosic material which connects the first device and the at least one further device to one another, with the proviso that no branch is provided in the conveying line for pre-comminuted, cellulosic material.
- a preferred embodiment of the plant according to the invention is that a discharge chute is provided which is in the first device for pre-shredding cellulosic Material opens out, and that means are provided with which cellulose in sheet form or cellulose in roll form can be introduced into the discharge chute.
- Two devices for comminuting cellulosic material are advantageously provided in the plant according to the invention.
- FIG. 1 shows an embodiment of the device according to the invention with a two-stage pulp comminution.
- the reference number 1 denotes cellulose in sheet form (800 mm ⁇ 600 mm), which is transported with a conveyor belt 3 in a direction which is indicated by an arrow above the cellulose pulp 1.
- the motor for driving the conveyor belt is not shown.
- the cellulose sheets 1 are thrown into the discharge chute 6 as required and from the granulator 9 (type Condux CS 500/1000; screen perforation> 0.75 mm ) pre-shredded. In this way, pulp is fed intermittently.
- the chute 6 is also fed pulp in roll form (800 mm wide).
- pulp is drawn off the roll 2a from a feed device 10, which essentially consists of two conveying rollers which are driven by a motor (not shown), and into the Conveying shaft 6 is introduced. In this way, pulp can be fed continuously.
- a second roll 2b with cellulose can be provided, from which cellulose can be removed while the roll 2a is being replaced.
- the reference numerals 7 and 8 denote metal detectors with which it can be determined whether there are metal pieces in the pulp, for example residues of metal strips, which are usually used for packaging the pulp. If pieces of metal are detected, the metal detectors switch off the granulator 9 and the conveyor belt 3 or the feed device 10 in order to prevent the knives of the granulator 9 from being damaged.
- the pulp pre-shredded in the granulator 9 enters the pipeline 12 (diameter: 150 mm), where it is caught by an air flow which is generated by the fan 11.
- the air flow is expediently set to a value between 20 and 25 m / s with the fan 11, the loading of the air flow with pre-comminuted pulp depending on the particle size being between 0.25 and 2.5 kg / m 3 of air.
- the pre-comminuted pulp is blown by the air flow into the cyclone 13, in which the pre-comminuted pulp settles out of the conveying gas.
- the feed gas is fed via line 14 into the discharge chute 6.
- the pre-shredded pulp enters the second granulator 15 (CS 500/1000; perforated screen ⁇ 20 mm), in which the pre-shredded pulp is further shredded to the desired particle size.
- the shredded pulp finally reaches the delivery line 16 in which the pulp is entrained by the air flow generated by a fan 17 and can be conveyed, for example, into a storage container (not shown).
- the two-stage shredding of the pulp not only enables the shredding performance of the two granulators to be better coordinated, it also prevents damage to the cellulose. It has also been found that a pulp dosage e.g. in a mixer, in which the comminuted pulp is introduced into the aqueous, tertiary amine oxide and the cellulose suspension is produced, is easier and more precisely possible.
Landscapes
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Disintegrating Or Milling (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Artificial Filaments (AREA)
- Paper (AREA)
- Saccharide Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9606401A BR9606401A (en) | 1995-05-30 | 1996-04-02 | Process and installation for crushing a cellulosic material |
JP8536022A JPH10503562A (en) | 1995-05-30 | 1996-04-02 | Process and plant for crushing cellulosic material |
AU52601/96A AU5260196A (en) | 1995-05-30 | 1996-04-02 | Process and plant for crushing a cellulose material |
AT96908908T ATE182378T1 (en) | 1995-05-30 | 1996-04-02 | SYSTEM FOR SHREDDING A CELLULOSIC MATERIAL |
DE59602474T DE59602474D1 (en) | 1995-05-30 | 1996-04-02 | PLANT FOR CRUSHING A CELLULOSIC MATERIAL |
EP96908908A EP0767848B1 (en) | 1995-05-30 | 1996-04-02 | Plant for crushing a cellulose material |
NO970364A NO970364D0 (en) | 1995-05-30 | 1997-01-28 | Process and plant for comminution of cellulose material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0091095A AT402306B (en) | 1995-05-30 | 1995-05-30 | METHOD AND SYSTEM FOR CRUSHING A CELLULOSIC MATERIAL |
ATA910/95 | 1995-05-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996038625A1 true WO1996038625A1 (en) | 1996-12-05 |
Family
ID=3502658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1996/000064 WO1996038625A1 (en) | 1995-05-30 | 1996-04-02 | Process and plant for crushing a cellulose material |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0767848B1 (en) |
JP (1) | JPH10503562A (en) |
AT (2) | AT402306B (en) |
AU (1) | AU5260196A (en) |
BR (1) | BR9606401A (en) |
CA (1) | CA2195409A1 (en) |
DE (1) | DE59602474D1 (en) |
NO (1) | NO970364D0 (en) |
WO (1) | WO1996038625A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7364681B2 (en) | 2002-01-08 | 2008-04-29 | Stefan Zikeli | Spinning device and method having cooling by blowing |
US7614864B2 (en) | 2002-01-28 | 2009-11-10 | Stefan Zikeli | Ergonomic spinning system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4596520B2 (en) * | 2004-08-25 | 2010-12-08 | 株式会社リブドゥコーポレーション | Pulp crusher |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3692246A (en) * | 1971-06-14 | 1972-09-19 | Williams Patent Crusher & Pulv | Fluff preparation system and apparatus |
WO1994028233A1 (en) * | 1993-05-24 | 1994-12-08 | Courtaulds Fibres (Holdings) Limited | Improvement in comminuting wood pulp sheeting |
-
1995
- 1995-05-30 AT AT0091095A patent/AT402306B/en not_active IP Right Cessation
-
1996
- 1996-04-02 AT AT96908908T patent/ATE182378T1/en active
- 1996-04-02 JP JP8536022A patent/JPH10503562A/en active Pending
- 1996-04-02 BR BR9606401A patent/BR9606401A/en not_active Application Discontinuation
- 1996-04-02 AU AU52601/96A patent/AU5260196A/en not_active Abandoned
- 1996-04-02 DE DE59602474T patent/DE59602474D1/en not_active Expired - Fee Related
- 1996-04-02 CA CA002195409A patent/CA2195409A1/en not_active Abandoned
- 1996-04-02 WO PCT/AT1996/000064 patent/WO1996038625A1/en not_active Application Discontinuation
- 1996-04-02 EP EP96908908A patent/EP0767848B1/en not_active Revoked
-
1997
- 1997-01-28 NO NO970364A patent/NO970364D0/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3692246A (en) * | 1971-06-14 | 1972-09-19 | Williams Patent Crusher & Pulv | Fluff preparation system and apparatus |
WO1994028233A1 (en) * | 1993-05-24 | 1994-12-08 | Courtaulds Fibres (Holdings) Limited | Improvement in comminuting wood pulp sheeting |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7364681B2 (en) | 2002-01-08 | 2008-04-29 | Stefan Zikeli | Spinning device and method having cooling by blowing |
US7614864B2 (en) | 2002-01-28 | 2009-11-10 | Stefan Zikeli | Ergonomic spinning system |
Also Published As
Publication number | Publication date |
---|---|
EP0767848B1 (en) | 1999-07-21 |
NO970364L (en) | 1997-01-28 |
ATE182378T1 (en) | 1999-08-15 |
NO970364D0 (en) | 1997-01-28 |
EP0767848A1 (en) | 1997-04-16 |
AT402306B (en) | 1997-04-25 |
JPH10503562A (en) | 1998-03-31 |
BR9606401A (en) | 1997-12-23 |
DE59602474D1 (en) | 1999-08-26 |
CA2195409A1 (en) | 1996-12-05 |
AU5260196A (en) | 1996-12-18 |
ATA91095A (en) | 1996-08-15 |
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