CN106164370B - The method of cooking cellulose fibrous material in continuous steamer - Google Patents
The method of cooking cellulose fibrous material in continuous steamer Download PDFInfo
- Publication number
- CN106164370B CN106164370B CN201580018554.7A CN201580018554A CN106164370B CN 106164370 B CN106164370 B CN 106164370B CN 201580018554 A CN201580018554 A CN 201580018554A CN 106164370 B CN106164370 B CN 106164370B
- Authority
- CN
- China
- Prior art keywords
- screen area
- boiling vessel
- cleaning solution
- supplied
- boiling
- 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.)
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Links
- 238000010411 cooking Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229920002678 cellulose Polymers 0.000 title claims abstract description 5
- 239000001913 cellulose Substances 0.000 title claims abstract description 5
- 239000002657 fibrous material Substances 0.000 title claims abstract description 5
- 238000009835 boiling Methods 0.000 claims abstract description 97
- 238000004140 cleaning Methods 0.000 claims abstract description 63
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 230000002411 adverse Effects 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 19
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 9
- 239000000243 solution Substances 0.000 description 28
- 239000000284 extract Substances 0.000 description 9
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/24—Continuous processes
-
- 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
- D21C7/00—Digesters
-
- 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
- D21C7/00—Digesters
- D21C7/14—Means for circulating the lye
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention discloses the method for the continuously cooking cellulosic fibre material in boiling vessel, the boiling vessel has top and bottom.The method of the present invention includes steps :-by include cellulose material fibrous material slurry and cooking liquor be supplied to boiling vessel top, first cleaning solution is supplied to the bottom part of boiling vessel, wherein the first cleaning solution adverse current moves up through at least part of boiling vessel, paper pulp is removed from the bottom of boiling vessel, second cleaning solution is at least supplied to in the height of the first screen area (screen section) center (center) of boiling vessel, the second screen area height by third cleaning solution be supplied to boiling vessel center, with-from the first screen area and the second screen area take out cooking liquor and cleaning solution, wherein the first screen area is placed at the lower part of boiling vessel and wherein the second screen area is placed in the lower section of first screen area.Therefore, according to the present invention, third cleaning solution is added to the center of boiling vessel in the height for being placed in the additional of boiling vessel lower part, the second extraction screen area.The method not only to improve the productivity in boiling vessel, and still maintains or even improve cleaning efficiency.
Description
Technical field
The present invention relates in continuous steamer (digester) boiling (digest) cellulosic fibre material to produce paper
The improved method for starching (pulp).
Background technique
Usually by cooking liquor (cooking liquor) (or white liquor) boiling wood material (such as clast) produce
Cellulosic fiber chemical pulp, the cooking liquor include the chemical substance for releasing fiber from lignin.Now most
Common digesting technoloy is Krafft (kraft) technique (also referred to as sulphate cook), wherein the activity chemistry in cooking liquor
Substance is sodium hydroxide and vulcanized sodium.The boiling carries out in pressurizing vessel, and the pressurizing vessel is often designed as greatly
Type vertical type cylinder, referred to as boiling vessel (digester).In continuous steaming-boiling technology, in continuously stream (stream) by sawdust and
Cooking liquor blows out (blown out) from the bottom of boiling vessel by digested paper pulp simultaneously supplied to the top of boiling vessel.Therefore,
Clast/paper pulp continuously moves downwards in boiling vessel.Boiling is interrupted by introducing colder cleaning liquid, so that paper pulp
It is cleaned.Typically, continuously cooking combines in same containers with the backwash of the paper pulp through boiling.In such arrangement
In, cooking zone is formed at the top of boiling container, and wherein paper pulp and liquid (liquor) are moved downward from top.Under boiling container
Portion forms cleaning area, and wherein paper pulp is further moved downward and substituted with cleaning solution and cooking liquor and therefore moved upwards, countercurrently to
It is upper to pass through clast column.By the sieve (screen) in cooking zone end by Liquid Residue (waste cooking liquid and cleaning solution) remove and
It is further processed in evaporator factory (evaporator plant).
A challenge for being related to continuous steaming-boiling technology is to maintain cleaning efficiency when improving and producing capacity (volume).
In general, keeping the high coefficient of dilution to be difficult in the boiling vessel when productivity is improved.EP1764441 describes paper
The continuous steaming-boiling technology of slurry, it is stated that the technique improves the cleaning efficiency in continuous steamer bottom.To solve this problem, by one
Additional screen area is placed in the perimeter (circumference) on bottom screen area and around boiling vessel most lower
It spreads between the uppermost component of screen area and the bottom part of additional screen area of side for the multiple of cleaning liquid
Coal addition position.However, in such an arrangement, additional cleaning liquid is peripherally added into institute between two screen areas
It states in boiling vessel, displacement efficiency will be very low accordingly.It therefore, will be very by the effect in terms of the cleaning efficiency of the arrangement
It is limited.
Therefore, still in need to provide a kind of method and arrangement to enhance the clear of continuous steamer under the productivity of raising
Wash capacity.
Summary of the invention
Therefore an object of the invention is maintained or is improved clear in continuous pulp digester when improving and producing capacity
Wash efficiency.
The method that the present invention is disclosed in continuously cooking cellulosic fibre material in boiling vessel, the boiling vessel have top and
Bottom.The method described in the present invention comprises the following steps that
The slurry of (cellulosic) fibrous material including cellulose material and cooking liquor are supplied to the top of boiling vessel
Portion,
First cleaning solution is supplied to the bottom part of boiling vessel, wherein the first cleaning solution adverse current moves up through steaming
At least part of boiler,
Paper pulp is removed from the bottom of boiling vessel,
Second cleaning solution is at least supplied to in the height of the first screen area the center (center) of boiling vessel,
The second screen area height by third cleaning solution be supplied to boiling vessel center, and
Cooking liquor and cleaning solution are taken out from the first screen area and the second screen area, wherein the first screen area is placed in
The lower part of boiling vessel and wherein the second screen area are placed in the lower section of first screen area.
Therefore, according to the present invention, be placed in boiling vessel lower part it is additional, second extract screen area height third is clear
Washing lotion is added to the center of boiling vessel.Method of the invention ensures delignification reaction with capacity as big as possible in the boiling vessel
Middle generation.This method but also is still maintained or is even mentioned not only further such that the productivity improved in boiling vessel is possibly realized
High cleaning efficiency.Cleaning solution adds the third to boiling vessel center, and cleaning solution ensures high displacement efficiency, further enhances
Cleaning efficiency.
In the text of the application, statement: by referring to from positioned at boiling vessel for the "center" of cleaning solution supply " extremely " boiling vessel
In a little or several points by the cleaning solution be supplied to paper pulp/liquid stream.Therefore, it be not distributed in around boiling vessel
Add cleaning solution in the position of perimeter.Preferably, it is supplied in the centre of the vertical stream of paper pulp/liquid or substantially in intermediate position
Answer or be added cleaning solution.
Statement " extracting the height of screen area " refers to by above the top edge of extraction screen area and the screen area 1
Height in rice limited range.
Term " screen area " includes the main flow (main in boiling vessel in cellulosic fibre material slurry
Flow) sieve row on direction or several sieves row sequentially arranged each other.
Term " top of boiling vessel " refers to the top section including boiling vessel and " bottom of boiling vessel " refers to including steaming
The bottom part of boiler.
Term " lower part of boiling vessel " refers to that boiling vessel carries out the part of paper pulp cleaning.
The invention further relates to have top and bottom by boiling sawdust production chemical pulp in cooking liquor
The continuous steamer in portion, wherein boiling vessel include:
For sawdust and cooking liquor to be supplied to the entrance at the top for being placed in boiling vessel of boiling vessel,
For removing the outlet at bottom for being placed in boiling vessel of the paper pulp,
At least the first and second screen areas, wherein the first screen area is placed in the lower part of boiling vessel and second sieve
Web area is placed under the first screen area,
For the device by the first cleaning solution supplied to the bottom of boiling vessel, wherein the first cleaning solution adverse current moves upwards
By at least part of boiling vessel,
It is used for the device at least in the height of the first screen area by the second cleaning solution supplied to the center of boiling vessel, and
Third cleaning solution is supplied to the device at the center of boiling vessel for the height in the second screen area,
Device for taking out cooking liquor and cleaning solution from least the first screen area and the second screen area.
" device " for supplying first, second, and third cleaning solution can be such as inlet tube or similar dress
It sets.
Embodiment
The present invention is further described by embodiment.
Fig. 1 shows the schematic diagram of boiling vessel according to the present invention.
Continuous steamer shown in Fig. 1 is pressurization, substantially cylindrical, including top and bottom container (1)
Form.Cellulosic fibre material (such as sawdust) and cooking liquor are continuously supplied to boiling vessel by entrance (2).In the appearance
In device, clast forms the porous clast column declined downwards in boiling vessel.Cooking liquor can be for example including sodium hydroxide and
The kraft cooking liquor of vulcanized sodium.The paper pulp through boiling is continuously removed or blown from the bottom of the boiling vessel by outlet (3)
Out.Central tube (5a, 5c) is arranged along the vertical centerline of container (1), individual (separated, separate) liquid input streams
(entry flow) can be transferred into the different height of container by the pipe.As shown in fig. 1, the central tube (5) can wrap
Include upper tube (5a) and lower tube (5c).However, one of ordinary skill in the art recognize that these pipes can be with several different mode cloth
It sets, for example, in the first height there is the first pipe of outlet can be concentrically arranged in the second pipe, second pipe has in institute
State the outlet of the second height on the first height.
One or more extraction mesh structures (4) can be placed on the top of container or the chamber wall of middle section, from these
Mesh structure cooking liquor can be removed (4a) from boiling vessel to reprocess elsewhere.
According to the present invention, the first and second extractions screen area (6 and 7) are placed in the lower part of boiling vessel, wherein first
Extract screen area (6) be placed in the lower part of boiling vessel and second screen area (7) be placed in the first extraction screen area (6) it
It is lower but from first extract screen area it is relatively small with a distance from.First, which extracts the lowermost portion of screen area (6) and second, extracts
Vertical distance between the highest part of screen area (7) can be such as 0.1-15m, preferably 0.5-5m.First extracts sieve
Region (6), which can be placed on second screen area, corresponds to 0-30 minutes, preferably 0.1-20 minutes and even more preferably 5-15
At the distance of the retention time (retention time) of minute.
First cleaning solution (8a, 8b) is pumped into the bottom part of container (1).It can be by single entrance or by being placed in container
Several entrances of bottom part first cleaning solution is added.The cleaning liquid displacement flowed up is extracted towards (toward)
The cooking liquor of sieve (6 and 7).Height by extracting screen area (6) first has the upper tube (5a) of outlet (5b) will
Centre of second cleaning solution (9) supplied to the center of boiling vessel and the clast column of downlink.By extracting screen area second
(7) center that there is height the lower central pipe (5c) of outlet (5d) third cleaning solution (10) to be supplied to boiling vessel, and under
The centre of capable clast column.First, second, and third cleaning solution may originate from one supplied from wash phase earlier (13), list
One, liquid.
(6) and described second are gone to extract screen area (7) taking-up cooking liquor and cleaning solution from the first extraction sieve
It (11,12) and is further processed in flash distillation (flash) and evaporation factory (evaporation plant) (not shown).It can incite somebody to action
Partially liq (12a) is recycled back to boiling vessel to enhance the distribution and mixing in boiling vessel.
Preferably for the paper pulp per ton produced, in the flow for the cleaning solution that each extraction screen area height is added
(m3/ADT) or volume is equal to or less than the fluid flow taken out from the extraction screen area.In this way, realization has
Effect replaces and is possible extracting screen area to maintain the movement of stable clast column.Further, in boiling vessel
(cocurrent) flow in the same direction of the liquid of middle section is maintained.Therefore, the stream for the second cleaning solution (9) being added
Amount is equal to or less than the flow for extracting the liquid (11) that screen area (6) take out from first.The third cleaning solution (10) being added
Flow be equal to or less than from second extract screen area (7) take out liquid (12) flow.
It should be understood that the present invention is not limited to specific process step described herein and arrangements.In addition extraction sieve and clear
Washing lotion addition point for example successively can be arranged sequentially on top of each other.The method described in the present invention for example may include third and/
Or the 4th extract screen area removing cooking liquor and the third and/or the 4th extract screen area height be added cleaning
Liquid.
Claims (9)
1. the method for continuously cooking cellulosic fibre material in boiling vessel, the boiling vessel has top and bottom, the side
Method includes the following steps:
The slurry of fibrous material including cellulose material and cooking liquor are supplied to the top of boiling vessel,
First cleaning solution is supplied to the bottom of boiling vessel, wherein the first cleaning solution adverse current moves up through boiling vessel extremely
Few a part,
Paper pulp is removed from the bottom of boiling vessel,
Second cleaning solution is at least supplied to in the height of the first screen area the center of boiling vessel,
The second screen area height by third cleaning solution be supplied to boiling vessel center, and
Screen area at least is extracted from the first screen area and second and takes out cooking liquor and cleaning solution, wherein the first screen area
It is placed in the lower part of boiling vessel and the second screen area is placed under first screen area,
The flow for the second cleaning solution being wherein added is less than the flow of the liquid taken out from the first screen area and is added
The flow of third cleaning solution be less than the flow of liquid taken out from the second screen area.
2. the method according to claim 1, wherein boiling vessel includes at least one central tube and is wherein incited somebody to action by the central tube
Second and/or third cleaning solution be supplied to boiling vessel center.
3. according to the method for any one of preceding claims, wherein first screen area is placed in second screen area
On corresponding to the distance of 0-30 minutes retention times at.
4. the method according to claim 1, wherein first screen area is placed on first screen area described in
The distance of first screen area is 0.1-15m.
5. the method according to claim 1, wherein taking boiling and cleaning solution from boiling vessel in additional third screen area
Cleaning solution is supplied to steaming out and wherein in the height of the third screen area or close to the height of the third screen area
Boiler.
6. according to the method in claim 3, wherein first screen area is placed on second screen area corresponds to
At the distance of 0.1-20 minutes retention times.
7. according to the method in claim 3, wherein first screen area is placed on second screen area corresponds to
At the distance of 5-15 minutes retention times.
8. method according to claim 4, wherein first screen area is placed on first screen area described in
The distance of first screen area is 0.5-5m.
9. for the continuous steamer with top and bottom by the boiling sawdust production chemical pulp in cooking liquor, wherein
Boiling vessel includes:
For sawdust and cooking liquor to be supplied to the entrance at the top for being placed in boiling vessel of boiling vessel,
For removing the outlet of the bottom for being placed in boiling vessel of paper pulp,
At least the first and second screen areas, wherein the first screen area is placed in the lower part of boiling vessel and second sieve area
Domain is placed under first screen area,
For the device by the first cleaning solution supplied to the bottom of boiling vessel, wherein the first cleaning solution adverse current moves up through
At least part of boiling vessel,
It is used for the device at least in the height of the first screen area by the second cleaning solution supplied to the center of boiling vessel, and
Third cleaning solution is supplied to the device at the center of boiling vessel for the height in the second screen area,
Device for taking out cooking liquor and cleaning solution from least the first screen area and the second screen area,
The flow for the second cleaning solution being wherein added is less than the flow of the liquid taken out from the first screen area and is added
The flow of third cleaning solution be less than the flow of liquid taken out from the second screen area.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461976053P | 2014-04-07 | 2014-04-07 | |
| US61/976,053 | 2014-04-07 | ||
| PCT/IB2015/052419 WO2015155642A1 (en) | 2014-04-07 | 2015-04-02 | A method of digesting cellulose fibrous material in a continuous digester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106164370A CN106164370A (en) | 2016-11-23 |
| CN106164370B true CN106164370B (en) | 2019-01-18 |
Family
ID=54287367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580018554.7A Active CN106164370B (en) | 2014-04-07 | 2015-04-02 | The method of cooking cellulose fibrous material in continuous steamer |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20170022664A1 (en) |
| EP (1) | EP3129546A4 (en) |
| CN (1) | CN106164370B (en) |
| BR (1) | BR112016023526A2 (en) |
| WO (1) | WO2015155642A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3298899A (en) * | 1962-03-03 | 1967-01-17 | Kamyr Ab | Method and arrangement for washing and cooling at the outlet end of a continuous cellulose digester |
| CN1091792A (en) * | 1992-11-18 | 1994-09-07 | 卡米尔公司 | The method of continuous cooking of pulp |
| EP1764441A1 (en) * | 2005-09-15 | 2007-03-21 | Kvaerner Pulping AB | Continuous digester with fluid circulation |
| CN102666974A (en) * | 2009-11-24 | 2012-09-12 | 安德里兹有限公司 | Method and system for thin chip digester cooking |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1229425A (en) * | 1958-07-09 | 1960-09-07 | Kamyr Ab | Process and installation for the continuous cooking of cellulose |
| SE356775B (en) * | 1970-02-11 | 1973-06-04 | Karlstad Mekaniska Ab | |
| US6123808A (en) * | 1997-12-09 | 2000-09-26 | Ahlstrom Machinery Inc. | Distribution of dilution liquor to the discharge of a cellulose pulp digester |
| US6241851B1 (en) * | 1998-03-03 | 2001-06-05 | Andritz-Ahlstrom Inc. | Treatment of cellulose material with additives while producing cellulose pulp |
| US20050274468A1 (en) * | 2004-05-28 | 2005-12-15 | Metso Paper, Inc. | Central screen |
| US9260818B2 (en) * | 2007-05-23 | 2016-02-16 | Andritz Inc. | Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| US8734610B2 (en) * | 2007-05-23 | 2014-05-27 | Andritz Inc. | Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| SE533610C2 (en) * | 2009-03-26 | 2010-11-02 | Metso Fiber Karlstad Ab | Method and apparatus for washing after finished boiling in a continuous boiler for producing cellulose pulp |
| US8647473B2 (en) * | 2011-01-25 | 2014-02-11 | Metso Paper Sweden Ab | Continuous digester with a bottom scraper equipped with draining apertures |
| US9371612B2 (en) * | 2011-02-22 | 2016-06-21 | Andritz Inc. | Method and apparatus to produce pulp using pre-hydrolysis and Kraft cooking |
-
2015
- 2015-04-02 CN CN201580018554.7A patent/CN106164370B/en active Active
- 2015-04-02 WO PCT/IB2015/052419 patent/WO2015155642A1/en active Application Filing
- 2015-04-02 BR BR112016023526A patent/BR112016023526A2/en not_active Application Discontinuation
- 2015-04-02 EP EP15776194.1A patent/EP3129546A4/en not_active Withdrawn
- 2015-04-02 US US15/302,212 patent/US20170022664A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3298899A (en) * | 1962-03-03 | 1967-01-17 | Kamyr Ab | Method and arrangement for washing and cooling at the outlet end of a continuous cellulose digester |
| CN1091792A (en) * | 1992-11-18 | 1994-09-07 | 卡米尔公司 | The method of continuous cooking of pulp |
| EP1764441A1 (en) * | 2005-09-15 | 2007-03-21 | Kvaerner Pulping AB | Continuous digester with fluid circulation |
| CN102666974A (en) * | 2009-11-24 | 2012-09-12 | 安德里兹有限公司 | Method and system for thin chip digester cooking |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3129546A4 (en) | 2017-11-15 |
| WO2015155642A1 (en) | 2015-10-15 |
| EP3129546A1 (en) | 2017-02-15 |
| US20170022664A1 (en) | 2017-01-26 |
| BR112016023526A2 (en) | 2017-08-15 |
| CN106164370A (en) | 2016-11-23 |
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