FR2390542A1 - Procede de commande de l'amenee de reactifs lors de la delignification de matiere cellulosique - Google Patents
Procede de commande de l'amenee de reactifs lors de la delignification de matiere cellulosiqueInfo
- Publication number
- FR2390542A1 FR2390542A1 FR7814087A FR7814087A FR2390542A1 FR 2390542 A1 FR2390542 A1 FR 2390542A1 FR 7814087 A FR7814087 A FR 7814087A FR 7814087 A FR7814087 A FR 7814087A FR 2390542 A1 FR2390542 A1 FR 2390542A1
- Authority
- FR
- France
- Prior art keywords
- reagents
- delignification
- supply
- determining
- flow rate
- 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
Links
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
- 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1052—Controlling the process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/09—Uses for paper making sludge
- Y10S162/10—Computer control of paper making variables
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pretreatment Of Seeds And Plants (AREA)
- Treatment Of Sludge (AREA)
Abstract
L'invention concerne un procédé de régulation de l'amenée de réactifs lors de la délignification de matière cellulosique dans lequel on introduit des réactifs dans une pâte contenant des substances consommatrices d'agents chimiques, on fait passer la pâte par un stade de délignification dans lequel les réactifs se consomment et on commande l'amenée d'agents chimiques d'après les valeurs mesurées de la teneur en réactifs. Ce procédé consiste à déterminer en continu le débit gravimétrique des réactifs chimiques introduits, à déterminer la quantité de réactifs résiduels non consommés, à déterminer le débit volumétrique de la pâte lors de la réaction de délignification, à déterminer la consommation relative de réactifs sur la base des étapes précédentes, et à corriger le débit de réactifs de manière à obtenir le degré de délignification désiré L'invention s'applique à l'industrie de la cellulose.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7705513A SE415580C (sv) | 1977-05-11 | 1977-05-11 | Forfarande for reglering av tillforseln av reaktionskemikalier vid delignifiering av cellulosamaterial |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2390542A1 true FR2390542A1 (fr) | 1978-12-08 |
FR2390542B1 FR2390542B1 (fr) | 1982-08-06 |
Family
ID=20331289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7814087A Granted FR2390542A1 (fr) | 1977-05-11 | 1978-05-11 | Procede de commande de l'amenee de reactifs lors de la delignification de matiere cellulosique |
Country Status (9)
Country | Link |
---|---|
US (1) | US4348256A (fr) |
JP (1) | JPS53139806A (fr) |
BR (1) | BR7802938A (fr) |
CA (1) | CA1099058A (fr) |
DE (1) | DE2819860C2 (fr) |
FI (1) | FI69494C (fr) |
FR (1) | FR2390542A1 (fr) |
NO (1) | NO151046C (fr) |
SE (1) | SE415580C (fr) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE421019B (sv) * | 1980-08-26 | 1981-11-16 | Kamyr Ab | Forfarande for kemikaliereglering vid behandling av en substans, speciellt massa, med gas |
JPS60155025A (ja) * | 1984-01-25 | 1985-08-14 | Nissan Motor Co Ltd | シヨツクアブソ−バ |
US5032976A (en) * | 1989-06-13 | 1991-07-16 | Elsag International B.V. | System for modeling and control for delignification of pulping |
US5032977A (en) * | 1989-06-13 | 1991-07-16 | Elsag International B.V. | System for modeling and control for delignification of pulping |
US5301102A (en) * | 1991-10-07 | 1994-04-05 | Westvaco Corporation | Multivariable control of a Kamyr digester |
US5403441A (en) * | 1992-11-13 | 1995-04-04 | Union Camp Patent Holding, Inc. | Method for controlling an ozone bleaching process |
US5736004A (en) * | 1995-03-03 | 1998-04-07 | Union Camp Patent Holding, Inc. | Control scheme for rapid pulp delignification and bleaching |
US5672247A (en) * | 1995-03-03 | 1997-09-30 | Union Camp Patent Holding, Inc. | Control scheme for rapid pulp delignification and bleaching |
SE514543C2 (sv) * | 1995-03-08 | 2001-03-12 | Kvaerner Pulping Tech | Apparat för inblandning av ett första fluidum i ett andra fluidum |
US6153050A (en) * | 1998-03-24 | 2000-11-28 | Noranda Forest Inc. | Method and system for controlling the addition of bleaching reagents to obtain a substantially constant percentage of pulp delignification across the first bleaching/delignifying stage |
DE19920338A1 (de) * | 1999-05-03 | 2000-11-16 | Voith Sulzer Papiertech Patent | Verfahren zur Erhöhung des Weißgrades von Papierfaserstoff |
WO2012166997A2 (fr) | 2011-05-31 | 2012-12-06 | Clean Chemistry, Llc | Réacteur électrochimique et procédé associé |
US20170107128A1 (en) | 2012-09-07 | 2017-04-20 | Clean Chemistry, Inc. | System and method for generation of reactive oxygen species and applications thereof |
CA2960104C (fr) | 2014-09-04 | 2023-05-02 | Clean Chemistry, Inc. | Procede de traitement de l'eau au moyen d'une solution oxydante de peracetate |
US10472265B2 (en) | 2015-03-26 | 2019-11-12 | Clean Chemistry, Inc. | Systems and methods of reducing a bacteria population in high hydrogen sulfide water |
US10400392B2 (en) * | 2015-10-05 | 2019-09-03 | Valmet Automation Oy | Measurement apparatus and method |
US10883224B2 (en) | 2015-12-07 | 2021-01-05 | Clean Chemistry, Inc. | Methods of pulp fiber treatment |
WO2017100299A1 (fr) | 2015-12-07 | 2017-06-15 | Clean Chemistry, Inc. | Procédés de traitement de fibres de pâte à papier |
US11136714B2 (en) | 2016-07-25 | 2021-10-05 | Clean Chemistry, Inc. | Methods of optical brightening agent removal |
FR3067275B1 (fr) | 2017-06-07 | 2022-08-12 | Timothee Boitouzet | Procede de delignification partielle par voie supercritique ou subcritique et de remplissage d'un materiau ligno-cellulosique |
US11001864B1 (en) | 2017-09-07 | 2021-05-11 | Clean Chemistry, Inc. | Bacterial control in fermentation systems |
US11311012B1 (en) | 2017-09-07 | 2022-04-26 | Clean Chemistry, Inc. | Bacterial control in fermentation systems |
FR3077895B1 (fr) | 2018-02-09 | 2020-02-28 | Sas Woodoo | Dispositif de detection tactile avec interface tactile en materiau composite |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3486971A (en) * | 1967-11-03 | 1969-12-30 | Systematix Controls Inc | Control of chlorine dioxide bleaching |
FR2174128A1 (en) * | 1972-02-28 | 1973-10-12 | Kaukas Ab Oy | Continuous cellulose bleaching - using reading as control parameter |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1009131A (fr) * | 1900-01-01 | |||
US2466290A (en) * | 1944-03-15 | 1949-04-05 | Paper Chemistry Inst | Method of digesting pulp by the alkaline process |
US3562384A (en) * | 1960-11-08 | 1971-02-09 | Miles Lab | Immunological indicator and test system |
US3679543A (en) * | 1970-08-18 | 1972-07-25 | Calgon Corp | Controlling the cooking process in pulp digestion by differential conductivity measurements |
USB300004I5 (fr) | 1970-10-02 | 1975-01-28 | Westinghouse Electric Corp | |
SE399966B (sv) * | 1973-10-17 | 1978-03-06 | Mo Och Domsjoe Ab | Sett att reglera mengden kemiska emnen i inom cellulosaindustrin och beslektade industrier forekommande vetskor |
-
1977
- 1977-05-11 SE SE7705513A patent/SE415580C/xx not_active IP Right Cessation
-
1978
- 1978-04-24 FI FI781272A patent/FI69494C/fi not_active IP Right Cessation
- 1978-05-04 JP JP5364978A patent/JPS53139806A/ja active Granted
- 1978-05-05 US US05/903,267 patent/US4348256A/en not_active Expired - Lifetime
- 1978-05-05 DE DE2819860A patent/DE2819860C2/de not_active Expired
- 1978-05-10 NO NO781646A patent/NO151046C/no unknown
- 1978-05-10 BR BR7802938A patent/BR7802938A/pt unknown
- 1978-05-11 CA CA303,102A patent/CA1099058A/fr not_active Expired
- 1978-05-11 FR FR7814087A patent/FR2390542A1/fr active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3486971A (en) * | 1967-11-03 | 1969-12-30 | Systematix Controls Inc | Control of chlorine dioxide bleaching |
FR2174128A1 (en) * | 1972-02-28 | 1973-10-12 | Kaukas Ab Oy | Continuous cellulose bleaching - using reading as control parameter |
Also Published As
Publication number | Publication date |
---|---|
JPS5730439B2 (fr) | 1982-06-29 |
FI781272A (fi) | 1978-11-12 |
FI69494B (fi) | 1985-10-31 |
NO151046C (no) | 1985-01-30 |
NO151046B (no) | 1984-10-22 |
JPS53139806A (en) | 1978-12-06 |
DE2819860C2 (de) | 1981-10-08 |
NO781646L (no) | 1978-11-14 |
CA1099058A (fr) | 1981-04-14 |
BR7802938A (pt) | 1979-01-23 |
SE415580B (sv) | 1980-10-13 |
SE7705513L (sv) | 1978-11-12 |
DE2819860A1 (de) | 1978-11-16 |
FI69494C (fi) | 1986-02-10 |
FR2390542B1 (fr) | 1982-08-06 |
US4348256A (en) | 1982-09-07 |
SE415580C (sv) | 1984-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |