FI950314A - Process for the production of pulp - Google Patents
Process for the production of pulp Download PDFInfo
- Publication number
- FI950314A FI950314A FI950314A FI950314A FI950314A FI 950314 A FI950314 A FI 950314A FI 950314 A FI950314 A FI 950314A FI 950314 A FI950314 A FI 950314A FI 950314 A FI950314 A FI 950314A
- Authority
- FI
- Finland
- Prior art keywords
- digester
- black liquor
- chips
- cooking
- pulp
- Prior art date
Links
Landscapes
- Paper (AREA)
Abstract
The present invention concerns a method for preparation of pulp by a so-called superbatch process in which chips are fed by a feed device into a digester in which air is removed between the chips with a suction device, the digester is filled from the bottom with black liquor which is preheated and impregnates the chips and removes air residues from the digester, the digester is pressurized and to pretreat the pulp with hot black liquor, the black liquor is pumped into the digester with simultaneous displacement of the previously fed black liquor, the digester liquid is supplied by pumping hot white liquor and a small amount of hot black liquor into the digester, the temperature in the digester is raised to the final cooking temperature by using steam, the cooking liquid is displaced with the cooled washed filtrate after the cooking reactions have reached the desired degree of cooking, the cooked pulp is removed from the digester by pumping it to a discharge vessel; and in which process the chips are treated with steam before supply impregnation liquor in order to evacuate the gases bonded to the fibers. <IMAGE>
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI950314A FI102394B (en) | 1995-01-24 | 1995-01-24 | Method for producing pulp |
SE9600272A SE9600272L (en) | 1995-01-24 | 1996-01-24 | Method and apparatus for treating pulp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI950314A FI102394B (en) | 1995-01-24 | 1995-01-24 | Method for producing pulp |
FI950314 | 1995-01-24 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI950314A0 FI950314A0 (en) | 1995-01-24 |
FI950314A true FI950314A (en) | 1996-07-25 |
FI102394B1 FI102394B1 (en) | 1998-11-30 |
FI102394B FI102394B (en) | 1998-11-30 |
Family
ID=8542509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI950314A FI102394B (en) | 1995-01-24 | 1995-01-24 | Method for producing pulp |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI102394B (en) |
-
1995
- 1995-01-24 FI FI950314A patent/FI102394B/en active
Also Published As
Publication number | Publication date |
---|---|
FI102394B1 (en) | 1998-11-30 |
FI102394B (en) | 1998-11-30 |
FI950314A0 (en) | 1995-01-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0763622A3 (en) | Continuous solvent pulping and washing processes and apparatus | |
CA2066181A1 (en) | Displacement heating in continuous digesters | |
FI923255A (en) | FOERFARANDE OCH ANORDNING FOER FRAMSTAELLNING AV MASSA | |
JPH05132882A (en) | Impregnation by black liquor prior to introduction of white liquor | |
NO166337B (en) | PROCEDURE FOR PREPARING CHEMICAL MECHANICAL MASS FRALIGNOCELLULOS MATERIAL. | |
JPH08508551A (en) | Cooking equipment for hardwood | |
FI950314A (en) | Process for the production of pulp | |
AU660023B2 (en) | Batch process for preparing kraft pulp | |
NO990309L (en) | Method and apparatus for bleaching wood pulp, especially containing recycled paper | |
FI78745B (en) | PUMPNING OCH FOERAEDLING AV SAOGSPAON. | |
SE7801813L (en) | PROCEDURE FOR PREPARING GRINDING PULP | |
EP0135461B1 (en) | Batch digester multi-stage pulping process | |
DE69121332D1 (en) | METHOD FOR PRODUCING POWERS | |
WO1987001402A1 (en) | Method for producing of cellulosic pulp | |
DE60236889D1 (en) | METHOD FOR THE CONTINUOUS COOKING OF PULP | |
SE0201512D0 (en) | Method for continuous cooking of raw material for cellulose pulp | |
PH31483A (en) | Method and apparatus for pulping cellulosic material using a vessel with an impregnation zone and anattrition zone. | |
FI951399A (en) | Method and apparatus for producing pulp | |
SE9902745L (en) | Method and apparatus for boiling pulp | |
FI91896C (en) | Method of oxygen bleaching | |
US2038925A (en) | Method and apparatus for the treatment of fibrous material | |
ES2168122T3 (en) | METHOD AND APPARATUS FOR HEATING AND PRESSURIZING A SUSPENSION OF FIBER PASTE DURING TRANSPORTATION TO A WHITENING REACTOR. | |
RU1838487C (en) | Method of sulfate cellulose preparing | |
FR2278837A1 (en) | Cooking lignocellulosic pulp - surge boil steps performed in digester to give more uniform cooking | |
SU744059A1 (en) | Method of cellulose production |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GB | Transfer or assigment of application |
Owner name: AHLSTROM MACHINERY OY |