DE3062314D1 - Process for preparing a paper pulp - Google Patents
Process for preparing a paper pulpInfo
- Publication number
- DE3062314D1 DE3062314D1 DE8080400369T DE3062314T DE3062314D1 DE 3062314 D1 DE3062314 D1 DE 3062314D1 DE 8080400369 T DE8080400369 T DE 8080400369T DE 3062314 T DE3062314 T DE 3062314T DE 3062314 D1 DE3062314 D1 DE 3062314D1
- Authority
- DE
- Germany
- Prior art keywords
- downstream
- section
- grinding
- upstream
- conveyance
- 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
Links
- 229920001131 Pulp (paper) Polymers 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000463 material Substances 0.000 abstract 5
- 238000000227 grinding Methods 0.000 abstract 4
- 238000011144 upstream manufacturing Methods 0.000 abstract 4
- 230000010006 flight Effects 0.000 abstract 3
- 238000005406 washing Methods 0.000 abstract 3
- 238000001914 filtration Methods 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000011295 pitch Substances 0.000 abstract 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 229920005610 lignin Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000000750 progressive effect Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/121—Screw constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/26—Permeable casings or strainers
-
- 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
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Sanitary Thin Papers (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Materials For Medical Uses (AREA)
Abstract
1. Process for grinding and washing a cellulosic material for the preparation of a paper pulp by passing the material, reduced in size to chips and impregnated with a reagent for removing lignin in a machine comprising at least two parallel screws driven in rotation inside a casing and provided with helical flights the pitches of which vary so as to determine several successive treatment zones, each zone including a section for conveyance and progressive compression and a braking section constituted by flights of inverted pitch provided with apertures allowing downstream passage of the material, having a size which is adjusted to allow selective advancement in the downstream direction of the material as a function of the degree of grinding achieved upstream of said apertures, characterised by the fact that the grinding and the washing of the chips is carried out simultaneously in the successive treatment zones of the machine, the casing of which is, for this purpose, constituted by an alternating series of filled regions and filtering regions, covering, respectively, the upstream portion and the downstream portion of each section for conveyance, each filled region being extended into the preceding braking section, the material being subjected as it passes from upstream to downstream in the machine whilst passing through each treatment zone, successively to a dilution by carrying out mixing with an actual washing liquid introduced upstream of the treatment zone then, into the flights of the screws to alternation between relaxation phases and phases of increase in pressure and finally to a drainage operation carried out at the same time as the grinding downstream of the section for conveyance and in the braking section, the used liquid being evacuated through the filtering regions of the casing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7907250A FR2451963A1 (en) | 1979-03-22 | 1979-03-22 | PROCESS AND INSTALLATION FOR PREPARING AND WASHING A PAPER PULP FROM A LIGNOCELLULOSIC MATERIAL REDUCED IN PIECES |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3062314D1 true DE3062314D1 (en) | 1983-04-21 |
Family
ID=9223444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8080400369T Expired DE3062314D1 (en) | 1979-03-22 | 1980-03-19 | Process for preparing a paper pulp |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0017544B1 (en) |
JP (1) | JPS55132788A (en) |
AT (1) | ATE2799T1 (en) |
AU (1) | AU534184B2 (en) |
BR (1) | BR8001684A (en) |
CA (1) | CA1131484A (en) |
DE (1) | DE3062314D1 (en) |
DK (1) | DK154153C (en) |
ES (1) | ES489784A1 (en) |
FI (1) | FI71585C (en) |
FR (1) | FR2451963A1 (en) |
NO (1) | NO151974C (en) |
NZ (1) | NZ193228A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE443383C (en) * | 1981-01-14 | 1987-11-16 | Mo Och Domsjoe Ab | PROCEDURE FOR WASHING CELLULOSAMASSA |
FR2509766A1 (en) * | 1981-07-20 | 1983-01-21 | Creusot Loire | PROCESS FOR PRODUCING CELLULOSIC FIBER PASTE FOR NON-PAPER USE |
FR2604197B1 (en) * | 1986-09-23 | 1988-11-18 | Atochem | PROCESS FOR BLEACHING LIGNOCELLULOSIC MATERIALS. |
FR2618811B1 (en) * | 1987-07-31 | 1990-06-22 | Centre Tech Ind Papier | PROCESS FOR THE MANUFACTURE OF BLEACHED CHEMICOMECHANICAL OR CHEMICOTHERMO-MECHANICAL PASTES |
FR2629844B1 (en) * | 1988-04-06 | 1991-09-27 | Clextral | PROCESS FOR THE MANUFACTURE OF A PAPER PULP FOR TRUST USE |
EP0979895A1 (en) * | 1998-08-12 | 2000-02-16 | Instituut Voor Agrotechnologisch Onderzoek (Ato-Dlo) | Method and device for refining fibres |
CN102852018A (en) * | 2012-09-11 | 2013-01-02 | 江苏金沃机械有限公司 | Double-screw washing machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2547577A (en) * | 1946-07-22 | 1951-04-03 | Detrex Corp | Countercurrent extraction apparatus |
US3004876A (en) * | 1957-03-20 | 1961-10-17 | Int Basic Economy Corp | Method for washing fibrous material |
FR1480415A (en) * | 1965-04-23 | 1967-05-12 | Werner & Pfleiderer | Method and equipment for expressing oil from seeds and oleaginous fruits in continuously operating plants |
FR2319737A1 (en) * | 1975-07-31 | 1977-02-25 | Creusot Loire | PAPER PULP MANUFACTURING PROCESS AND MACHINE |
-
1979
- 1979-03-22 FR FR7907250A patent/FR2451963A1/en active Granted
-
1980
- 1980-03-14 NO NO800736A patent/NO151974C/en unknown
- 1980-03-19 DE DE8080400369T patent/DE3062314D1/en not_active Expired
- 1980-03-19 AT AT80400369T patent/ATE2799T1/en not_active IP Right Cessation
- 1980-03-19 EP EP80400369A patent/EP0017544B1/en not_active Expired
- 1980-03-21 CA CA348,204A patent/CA1131484A/en not_active Expired
- 1980-03-21 FI FI800887A patent/FI71585C/en not_active IP Right Cessation
- 1980-03-21 BR BR8001684A patent/BR8001684A/en not_active IP Right Cessation
- 1980-03-21 AU AU56679/80A patent/AU534184B2/en not_active Ceased
- 1980-03-21 NZ NZ193228A patent/NZ193228A/en unknown
- 1980-03-21 ES ES489784A patent/ES489784A1/en not_active Expired
- 1980-03-21 DK DK125280A patent/DK154153C/en not_active IP Right Cessation
- 1980-03-21 JP JP3679580A patent/JPS55132788A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
BR8001684A (en) | 1980-11-18 |
NO800736L (en) | 1980-09-23 |
FR2451963B1 (en) | 1982-05-07 |
FR2451963A1 (en) | 1980-10-17 |
CA1131484A (en) | 1982-09-14 |
AU5667980A (en) | 1980-09-25 |
FI800887A (en) | 1980-09-23 |
FI71585B (en) | 1986-10-10 |
ES489784A1 (en) | 1980-09-16 |
AU534184B2 (en) | 1984-01-12 |
JPS55132788A (en) | 1980-10-15 |
NO151974B (en) | 1985-04-01 |
EP0017544B1 (en) | 1983-03-16 |
FI71585C (en) | 1987-01-19 |
ATE2799T1 (en) | 1983-04-15 |
DK154153C (en) | 1989-05-22 |
EP0017544A1 (en) | 1980-10-15 |
NZ193228A (en) | 1984-07-31 |
DK125280A (en) | 1980-09-23 |
NO151974C (en) | 1985-07-17 |
DK154153B (en) | 1988-10-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: CLEXTRAL, COURBEVOIE, FR |
|
8328 | Change in the person/name/address of the agent |
Free format text: BEETZ SEN., R., DIPL.-ING. BEETZ JUN., R., DIPL.-ING. DR.-ING. TIMPE, W., DR.-ING. SIEGFRIED, J., DIPL.-ING. SCHMITT-FUMIAN, W., PRIVATDOZENT, DIPL.-CHEM. DR.RER.NAT., PAT.-ANW., 8000 MUENCHEN |