EP0477059A2 - Tränkung mit Schwarzlauge vor der Zufuhr der Weisslauge - Google Patents

Tränkung mit Schwarzlauge vor der Zufuhr der Weisslauge Download PDF

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Publication number
EP0477059A2
EP0477059A2 EP91402350A EP91402350A EP0477059A2 EP 0477059 A2 EP0477059 A2 EP 0477059A2 EP 91402350 A EP91402350 A EP 91402350A EP 91402350 A EP91402350 A EP 91402350A EP 0477059 A2 EP0477059 A2 EP 0477059A2
Authority
EP
European Patent Office
Prior art keywords
liquid
cooking
liquor
slurry
withdrawn
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
EP91402350A
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English (en)
French (fr)
Other versions
EP0477059A3 (en
EP0477059B1 (de
Inventor
Johan C.F.C. Richter
Ole J. Richter
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.)
Metso Fiber Karlstad AB
Original Assignee
Kvaerner Pulping Technologies AB
Kamyr AB
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 Kvaerner Pulping Technologies AB, Kamyr AB filed Critical Kvaerner Pulping Technologies AB
Publication of EP0477059A2 publication Critical patent/EP0477059A2/de
Publication of EP0477059A3 publication Critical patent/EP0477059A3/en
Application granted granted Critical
Publication of EP0477059B1 publication Critical patent/EP0477059B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • 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

Definitions

  • a method of continuously treating comminuted cellulosic fibrous material to produce paper pulp, particularly kraft pulp which has enhanced uniformity and minimized energy requirements.
  • impregnation by rapid diffusion is accomplished so that the uniformity of treatment is enhanced, and preferably the cooking liquor is passed in heat exchange relationship with black liquor withdrawn from a digester so as to preheat the cooking liquor. This minimizes the consumption of high pressure steam in a conventional indirect heater.
  • a method of effecting continuous kraft cooking of comminuted cellulosic fibrous material comprises the steps of continuously: (a) Effecting rapid displacement heating of comminuted cellulosic fibrous material moving in a first flow path by introducing black liquor, substantially at cooking temperature, into the material moving in the first flow path. Then (b) effecting rapid diffusion impregnation of the material moving in a second flow path, after the first flow path, by introducing white liquor into the material moving in the second flow path. And then (c) effecting continuous kraft cooking of the material. Step (b) is preferably practiced by introducing the white liquor substantially at cooking temperature into the second flow path, after it has been passed into heat exchange relationship with the black liquor substantially at cooking temperature.
  • a method of continuously treating comminuted cellulosic fibrous material to produce kraft pulp comprises the steps of continuously: (a) Slurrying comminuted cellulosic fibrous material with liquid to produce a slurry. (b) Feeding the slurry into a soaking and heating zone. (c) Heating and soaking the slurry with heating and soaking liquid in the heating and soaking zone. (d) Feeding the slurry from the heating and soaking zone into an impregnation and cooking zone. (e) Treating the slurry with kraft cooking liquor at cooking temperature in the impregnation and cooking zone to effect digestion of the material in the slurry, to produce kraft pulp.
  • step (f) Withdrawing black liquor from the impregnation and cooking zone, at cooking temperature. And, (g) feeding at least a portion of the black liquor withdrawn in step (f) to the soaking and heating zone to provide at least a part of the soaking and heating liquid in step (c).
  • step (h) of preheating the cooking liquor before feeding it into the impregnation and cooking zone by passing it into heat exchange relationship with a first portion of the black liquor withdrawn in step (f), while a second portion of the black liquor withdrawn in step (f) is used in step (g).
  • Step (b) may be practiced in part by withdrawing a portion of the liquid from the slurry at a withdrawal area above the heating and soaking zone, pressurizing the withdrawn liquid, and introducing the pressurized withdrawn liquid into the slurry, above the withdrawal area, with a primarily downward vector.
  • Steps (c) and (g) are preferably practiced by withdrawing a portion of the liquid from the slurry in the heating and soaking zone at a withdrawal area, recirculating the withdrawn liquid back into the heating and soaking zone above the withdrawal area, and adding black liquor from step (f) to the recirculating withdrawn liquid.
  • Step (a) is preferably practiced by slurrying the material with black liquor.
  • Steps (b)-(f) are preferably practiced in a single vertical vessel, the material moving downwardly in the vessel during treatment.
  • a method of treating a slurry of comminuted cellulosic fibrous material in an upright vessel having a top and bottom, and at least first, second, and third sets of screens, vertically spaced from each other with the first set of screens the topmost screens, and the third set the bottom most comprises the steps of: (a) Introducing the slurry into the top of the vessel, to flow downwardly therein. (b) Withdrawing a part of the liquid from the slurry with the first set of screens, and recirculating the withdrawn liquid back into the vessel above the first set of screens.
  • FIGURE 1 is a schematic view of an exemplary apparatus for practice of the method according to the present invention.
  • FIGURE 1 Many of the components of the apparatus illustrated in FIGURE 1 are the same as, or comparable to, parts of the apparatus of U.S. patent 3,802,956, the disclosure of which is hereby incorporated by reference herein. That patent shows apparatus for effecting continuous pulping, particularly kraft pulping, of comminuted cellulosic fibrous material, with a view toward proper impregnation of the material.
  • Apparatus of the system of FIGURE 1 that is generally comparable to that in said patent 3,802,956 includes a chips bin 11 (which may be a steaming chips bin), communicating with a low pressure valve 13 with a conventional steaming vessel 14.
  • Low pressure steam e.g. one atmosphere over pressure, is supplied to the vessel 14 through a conduit 15, and air is driven off through conduit 17.
  • the chips ultimately pass through chute 18 into the conventional high pressure feeder 19, circulating liquid being forced by pump 20 to entrain chips -- or like cellulosic fibrous material -- dropping from chute 18 into the transfer device 19 in the circulating liquid.
  • the chips from high pressure feeder 19 pass in conduit 21 to the top of a substantially vertical digester 22.
  • the slurry of chips in liquid passes into apparatus at the top of the digester 22 for separating a portion of the liquid, the apparatus preferably comprising a strainer girdle 25 with a feed screw 27 therein, and the withdrawn liquid passing in conduit 23 back to the pump 20.
  • a screen 28 is provided adjacent to the top of the digester 22, but below the girdle 25 and screw 27, connected to pump 26, which in turn is connected to nozzles 24.
  • a portion of the liquid withdrawn from the slurry through screen 28 is pressurized by pump 26 and then forced through the nozzles 24 back into the vessel, above the screen 28, with a substantially downward velocity vector.
  • This system is primarily for producing a downward thrust on the material for operational purposes, so that it flows concurrently with liquid initially down into the digester 22.
  • a portion of the liquid withdrawn by screen 28 is passed via conduit 30 to the second effect 90 of a flash tank system, as hereinafter described.
  • the chips are flushed into the high pressure feeder 19 through chute 18 via liquid flowing in loop 37 under the influence of pump 35. Excess liquid passes into level tank 39 and is returned therefrom through conduit 41 and pump 29 to the high pressure side. Additionally, make-up liquor -- which may be black liquor from source 33, white liquor from source 31, or a combination of both (as metered by valve 48), and valves 10, 12, may be provided. This liquid passes to the top exterior of the strainer girdle 25 -- i.e. the high pressure loop -- via conduit 50.
  • a soaking and heating zone Below the screen 28 adjacent the top of the vessel 22 is a soaking and heating zone.
  • a screen 40 connected to a pump 42, is provided in the soaking and heating zone.
  • the pump 42 withdraws a portion of the liquid from the slurry moving downwardly in the vessel 22, and recirculates it in loop 43 to the inlet tube 46 above the screen 40. Liquid introduced thereby tends to flow countercurrently to the chips moving downwardly in the vessel 22, ultimately being withdrawn by screen 28.
  • a heater such as an indirect heater (heating liquid with steam), may be provided in the circulation loop 43, but is not necessary according to the invention.
  • an impregnation and cooking zone is provided below the screen 40.
  • an impregnation and cooking zone is provided within the impregnation and cooking zone.
  • a portion of the liquid in the slurry moving downwardly at the screen 63 is withdrawn therefrom via pump 65, and passed through conventional indirect steam heater (heat exchanger) 67 to be heated, the withdrawn liquid being recirculated and introduced at central return conduit 69 into the chips column above the screen 63.
  • heat exchanger conventional indirect steam heater
  • kraft cooking liquor (white liquor) from source 31 may be pumped by pump 36 to this recirculation loop, e.g. added to the pump 65 to be introduced with the recirculated liquid.
  • the screens 87 and 92 withdraw black liquor from the digester 22.
  • a portion of the black liquor withdrawn by screen 92 under the influence of pump 93 may be recirculated into the digester 22 and introduced at central conduit 95, while another portion passes through valve 32 ultimately to the second stage flash tank 90.
  • the conduit 91 from the bottom of the flash tank 90 may be used to supply black liquor to the source 33.
  • black liquor withdrawn through screen 87 passes into conduit 110, which is connected to the circulation loop 43 including the pump 42, so that it is introduced at the return conduit 46 into the vessel.
  • the black liquor in conduit 110 is substantially at cooking temperature (e.g. about 160-180°C).
  • Another portion of the liquor withdrawn with screens 87 -- which also is at substantially cooking temperature -- is used to preheat white liquor introduced from source 31 into pump 65.
  • This may preferably be accomplished by passing the conduit 112 and the conduit 38 into a heat exchanger 114, whereby the black hot liquor in conduit 112 comes into heat exchange relationship with the cool white liquor in conduit 38, preheating it before it is introduced into pump 65.
  • the heat exchanger 114 would preheat the white liquor from about 70°C to about 160°C. Little additional energy input is required from the heater 67.
  • the remaining black liquor in conduit 112 is passed to a first stage flash tank 89.
  • the arrangement described above in addition to obviously minimizing energy requirements, also effects very uniform impregnation.
  • the black liquor introduced from conduit 110 soaks and heats the chips, effecting rapid displacement heating thereof.
  • This rapid displacement heating makes the chips much more amenable to impregnation with white liquor. That means when the chips pass downwardly into the impregnation and cooking zone, and are confronted with hot white liquor, rapid diffusion impregnation of the chips with white liquor occurs.
  • the chips are then cooked at a temperature of about 160-180°C, and then passed downwardly into the lower part of the digester 22 where they are preferably washed.
  • a screen 79 is connected to a pump 81, heater 83, and central supply conduit 85. Washing liquid is introduced into the conduit 71 to flow countercurrently (that is upwardly) with respect to the downward flowing chips, with a portion of the liquid being withdrawn through screen 79, heated, and recirculated back into conduit 85. The washed, kraft pulp, may then be discharged from the bottom of the vessel utilizing a conventional rotary scraper 99, and a throttling device 101 if desired.
  • a slurry of comminuted cellulosic fibrous material (e.g. wood chips) in liquid e.g.. black liquor combined with steam which condensed on the chips from steaming vessel 14, and any natural liquid in the chips
  • liquid e.g.. black liquor combined with steam which condensed on the chips from steaming vessel 14, and any natural liquid in the chips
  • a first set of screens 40 part of the liquid in the slurry may be removed, and introduced back into the vessel, with black liquor withdrawn through screen 87 by conduit 110 being introduced into the recirculation loop 43.
  • the chips are soaked and heated, the black liquor in conduit 110 being substantially at cooking temperature. This rapid displacement heating of the chips makes them susceptible to subsequent impregnation during the continuous processing thereof.
  • the chips As the chips move downwardly further in the vessel 22 they encounter the second set of screens 63. A portion of the liquid is withdrawn therethrough, heated by heater 67, and reintroduced by central conduit 69.
  • White liquor from source 31, pumped by pump 36, in conduit 38 is added to the pump 65 in this recirculation loop.
  • the white liquor is preheated by passing it through the heat exchanger 114, in heat exchange relationship with black liquor in conduit 112. Since the chips are susceptible to impregnation due to their soaking and heating by rapid displacement heating, rapid diffusion impregnation of the chips with white liquor occurs adjacent the screen 63 and thereabove. Below the screen 63, kraft cooking of the chips takes place. The chips are ultimately washed at or above screen 79, and are subsequently discharged from the bottom of the vessel.

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  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Alcoholic Beverages (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Toys (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
  • Electroluminescent Light Sources (AREA)
  • Reinforced Plastic Materials (AREA)
  • Coloring (AREA)
EP91402350A 1990-09-20 1991-09-03 Tränkung mit Schwarzlauge vor der Zufuhr der Weisslauge Expired - Lifetime EP0477059B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58579090A 1990-09-20 1990-09-20
US585790 1990-09-20

Publications (3)

Publication Number Publication Date
EP0477059A2 true EP0477059A2 (de) 1992-03-25
EP0477059A3 EP0477059A3 (en) 1993-06-23
EP0477059B1 EP0477059B1 (de) 1995-07-12

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Family Applications (1)

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EP91402350A Expired - Lifetime EP0477059B1 (de) 1990-09-20 1991-09-03 Tränkung mit Schwarzlauge vor der Zufuhr der Weisslauge

Country Status (8)

Country Link
EP (1) EP0477059B1 (de)
JP (1) JP3126763B2 (de)
AT (1) ATE125010T1 (de)
BR (1) BR9104005A (de)
CA (1) CA2050818C (de)
DE (1) DE69111165T2 (de)
FI (1) FI103589B (de)
NO (1) NO913628L (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018261A1 (en) * 1993-12-29 1995-07-06 Kvaerner Pulping Technologies Ab Method and device for the continuous cooking of pulp
US5489363A (en) * 1993-05-04 1996-02-06 Kamyr, Inc. Pulping with low dissolved solids for improved pulp strength
WO1996007786A1 (en) * 1994-09-02 1996-03-14 Kamyr, Inc. Continuous kraft cooking with black liquor pretreatment
WO1996007787A1 (en) * 1994-09-02 1996-03-14 Kamyr, Inc. Cooking with spent liquor pretreatment of cellulose material
WO1996015313A1 (en) * 1994-11-15 1996-05-23 Kvaerner Pulping Ab Black liquor impregnation in single-vessel hydraulic digester
US5635026A (en) * 1995-11-13 1997-06-03 Ahlstrom Machinery Inc. Cooking cellulose material with high alkali concentrations and/or high pH
EP0822288A2 (de) * 1993-11-08 1998-02-04 Ahlstrom Machinery, Inc. Kontinuierlicher Kocher zur Durchführung von Zellstoffaufschluss mit Kontrolle der gelösten Feststoffe
US5824187A (en) * 1993-12-29 1998-10-20 Kvaerner Pulping Ab Method for the continuous cooking of pulp
US5925216A (en) * 1994-11-15 1999-07-20 Kvaerner Pulping Ab Method of continuous pulping in a digester with high black liquor usage in the impregnation stage
AU721103B2 (en) * 1993-05-04 2000-06-22 Kamyr Inc. Dissolved solids control in pulp protection
US6159336A (en) * 1997-08-07 2000-12-12 Kvaerner Pulping Ab Method and device for the continuous cooking of pulp
US6248208B1 (en) 1995-06-02 2001-06-19 Andritz-Ahlstrom Inc. Pretreatment of chips before cooking
EP1561856A1 (de) * 2004-02-09 2005-08-10 Kvaerner Pulping Ab Verfahren zum kontinuierlichen Kochen von Zellstoffpulpe
EP2390409A1 (de) * 2010-05-31 2011-11-30 Chempolis Oy Lignozelluloseverfahren
US8808498B2 (en) 2009-03-05 2014-08-19 Andritz Inc. Heat recovery from spent cooking liquor in a digester plant of a chemical pulp mill
EP3851576A1 (de) * 2020-01-15 2021-07-21 Chempolis Oy Gargerät und verfahren zur behandlung von lignocellulosehaltiger biomasse

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506458C2 (sv) 1996-02-09 1997-12-15 Kvaerner Pulping Tech Kontinuerlig kokning av cellulosahaltigt material med värmeväxling mellan kokaravdrag och cirkulerande kokvätska
US20010032711A1 (en) * 1998-10-26 2001-10-25 C. Bertil Stromberg Pulp cooking with particular alkali profiles
SE518993E (sv) * 2002-01-24 2013-04-23 Metso Paper Sweden Ab Framställning av cellulosamassa genom kokning med en kokvätska innehållande förindunstad svartlut
US7556713B2 (en) * 2004-06-22 2009-07-07 Andritz, Inc. Method and system for feeding cellulose chips to a high pressure continuous cooking system
SE0602675L (sv) * 2006-12-13 2007-09-18 Metso Fiber Karlstad Ab Metod för att energieffektivt producera cellulosamassa i ett kontinuerligt kokeri

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303088A (en) * 1963-04-19 1967-02-07 Lummus Co Continuous liquid-phase rapid pulping
US3802956A (en) * 1970-03-17 1974-04-09 Kamyr Ab Method for impregnation of cellulosic fiber material with digesting liquor while preventing dilution of said liquor
WO1991005103A2 (en) * 1989-09-28 1991-04-18 Beloit Corporation Displacement heating in continuous digesters

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303088A (en) * 1963-04-19 1967-02-07 Lummus Co Continuous liquid-phase rapid pulping
US3802956A (en) * 1970-03-17 1974-04-09 Kamyr Ab Method for impregnation of cellulosic fiber material with digesting liquor while preventing dilution of said liquor
WO1991005103A2 (en) * 1989-09-28 1991-04-18 Beloit Corporation Displacement heating in continuous digesters

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1308554A2 (de) * 1993-05-04 2003-05-07 Andritz Inc. Kontrolle der gelösten Feststoffe bei der Zellstoffherstellung
AU721103B2 (en) * 1993-05-04 2000-06-22 Kamyr Inc. Dissolved solids control in pulp protection
EP1308555A2 (de) * 1993-05-04 2003-05-07 Andritz Inc. Kontrolle der gelösten Feststoffe bei der Zellstoffherstellung
EP1308555B1 (de) * 1993-05-04 2006-05-10 Andritz Inc. Kontrolle der gelösten Feststoffe bei der Zellstoffherstellung
EP1308554B1 (de) * 1993-05-04 2006-05-10 Andritz Inc. Kontrolle der gelösten Feststoffe bei der Zellstoffherstellung
US5547012A (en) * 1993-05-04 1996-08-20 Kamyr, Inc. Dissolved solids control in pulp production
US5489363A (en) * 1993-05-04 1996-02-06 Kamyr, Inc. Pulping with low dissolved solids for improved pulp strength
RU2127783C1 (ru) * 1993-05-04 1999-03-20 Альстрем Машинери Инк. Способ получения и варки сульфатной целлюлозы (варианты), сульфатная целлюлоза, полученная способом и установка для осуществления способа
US5849151A (en) * 1993-05-04 1998-12-15 Ahlstrom Machinery Inc. Continuous digester having means for implementing low dissolved solids profiling
EP1538256A3 (de) * 1993-11-08 2006-01-25 Andritz Inc Verwirklichung des Profils der gelösten Feststoffe
EP1538256A2 (de) * 1993-11-08 2005-06-08 Andritz Inc Verwirklichung des Profils der gelösten Feststoffe
EP0822288A3 (de) * 1993-11-08 1998-10-28 Ahlstrom Machinery, Inc. Kontinuierlicher Kocher zur Durchführung von Zellstoffaufschluss mit Kontrolle der gelösten Feststoffe
EP0822288A2 (de) * 1993-11-08 1998-02-04 Ahlstrom Machinery, Inc. Kontinuierlicher Kocher zur Durchführung von Zellstoffaufschluss mit Kontrolle der gelösten Feststoffe
EP1878827A3 (de) * 1993-11-08 2008-06-18 Andritz Inc. Profilierung aufgelöster Feststoffe
US5716497A (en) * 1993-12-29 1998-02-10 Kvaerner Pulping Ab Method and device for the continuous cooking of pulp
WO1995018261A1 (en) * 1993-12-29 1995-07-06 Kvaerner Pulping Technologies Ab Method and device for the continuous cooking of pulp
US5824187A (en) * 1993-12-29 1998-10-20 Kvaerner Pulping Ab Method for the continuous cooking of pulp
WO1996007786A1 (en) * 1994-09-02 1996-03-14 Kamyr, Inc. Continuous kraft cooking with black liquor pretreatment
WO1996007787A1 (en) * 1994-09-02 1996-03-14 Kamyr, Inc. Cooking with spent liquor pretreatment of cellulose material
WO1996015313A1 (en) * 1994-11-15 1996-05-23 Kvaerner Pulping Ab Black liquor impregnation in single-vessel hydraulic digester
US6063238A (en) * 1994-11-15 2000-05-16 Kvaerner Pulping Ab Black liquor impregnation in digester
US5925216A (en) * 1994-11-15 1999-07-20 Kvaerner Pulping Ab Method of continuous pulping in a digester with high black liquor usage in the impregnation stage
US6544384B2 (en) 1995-06-02 2003-04-08 Andritz Inc. Pretreatment of chips before cooking
US6506283B2 (en) 1995-06-02 2003-01-14 Andritz Inc. Pretreatment of chips before cooking
US6248208B1 (en) 1995-06-02 2001-06-19 Andritz-Ahlstrom Inc. Pretreatment of chips before cooking
US5635026A (en) * 1995-11-13 1997-06-03 Ahlstrom Machinery Inc. Cooking cellulose material with high alkali concentrations and/or high pH
US6159336A (en) * 1997-08-07 2000-12-12 Kvaerner Pulping Ab Method and device for the continuous cooking of pulp
EP1561856A1 (de) * 2004-02-09 2005-08-10 Kvaerner Pulping Ab Verfahren zum kontinuierlichen Kochen von Zellstoffpulpe
US8808498B2 (en) 2009-03-05 2014-08-19 Andritz Inc. Heat recovery from spent cooking liquor in a digester plant of a chemical pulp mill
EP2390409A1 (de) * 2010-05-31 2011-11-30 Chempolis Oy Lignozelluloseverfahren
CN102268829A (zh) * 2010-05-31 2011-12-07 坎普利斯公司 植物纤维处理
EP3851576A1 (de) * 2020-01-15 2021-07-21 Chempolis Oy Gargerät und verfahren zur behandlung von lignocellulosehaltiger biomasse

Also Published As

Publication number Publication date
FI914378A0 (fi) 1991-09-18
FI103589B1 (fi) 1999-07-30
JPH05132882A (ja) 1993-05-28
JP3126763B2 (ja) 2001-01-22
CA2050818A1 (en) 1992-03-21
ATE125010T1 (de) 1995-07-15
BR9104005A (pt) 1992-05-26
FI914378A (fi) 1992-03-21
NO913628D0 (no) 1991-09-13
EP0477059A3 (en) 1993-06-23
CA2050818C (en) 2002-07-02
DE69111165D1 (de) 1995-08-17
EP0477059B1 (de) 1995-07-12
FI103589B (fi) 1999-07-30
DE69111165T2 (de) 1995-11-16
NO913628L (no) 1992-03-23

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