NO981650L - FremgangsmÕte for bestemmelse av cellulosekokings endepunkt og en anordning for Õ kontrollere cellulosekokingstiden i en reaktor - Google Patents

FremgangsmÕte for bestemmelse av cellulosekokings endepunkt og en anordning for Õ kontrollere cellulosekokingstiden i en reaktor

Info

Publication number
NO981650L
NO981650L NO981650A NO981650A NO981650L NO 981650 L NO981650 L NO 981650L NO 981650 A NO981650 A NO 981650A NO 981650 A NO981650 A NO 981650A NO 981650 L NO981650 L NO 981650L
Authority
NO
Norway
Prior art keywords
cooking
values
measurement values
cellulose boiling
cellulose
Prior art date
Application number
NO981650A
Other languages
English (en)
Other versions
NO981650D0 (no
Inventor
Dragan Obradovic
Herbert Furumoto
Klaus Fischer
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of NO981650L publication Critical patent/NO981650L/no
Publication of NO981650D0 publication Critical patent/NO981650D0/no

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
    • D21C7/00—Digesters
    • D21C7/12—Devices for regulating or controlling
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/0265—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion
    • G05B13/027—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion using neural networks only

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Medical Informatics (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

Ved cellulosekoking skal tidspunktet bestemmes, hvorved viskositeten og/eller kappatallet av de produserte celluloser har forhåndsbestemte verdier. Da disse verdier først kan bestemmes etter koke- prosessen, må egnede modeller anvendes. Til dette anvendes et neuralt nettverk, hvis utgangsverdier er den ønskede viskositet og/eller kappatallet, hvorfra den påkrevde koketid kan bestemmes, og dens inngangsverdier er måleverdier for kokeprosessen. Ifølge oppfinnelsen tilpasses det neurale nettverket under en kontinuerlig kokereaksjon, på basis av en dynamisk modell med endrede måleverdier. Som måleverdier ved cellulosekokingen benyttes særlig kokesyrens S02-innhold, fargeverdi og elektrisk ledningsevne respektivt pH-verdi. Ved den tilhørende anordning er den anvendte modellen (10) en kombinasjon av analytiske modeller (101 - 103, 201 - 204) av prosessvariabler med det neurale nettverket (100, 200).
NO981650A 1995-10-09 1998-04-08 FremgangsmÕte for bestemmelse av cellulosekokings endepunkt og en anordning for Õ kontrollere cellulosekokingstiden i en reaktor NO981650D0 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537539 1995-10-09
PCT/DE1996/001841 WO1997013916A2 (de) 1995-10-09 1996-09-26 Verfahren zur bestimmung des endpunktes der zellstoffkochung und anordnung zum steuern der kochzeit bei der zellstoffkochung in einem reaktor

Publications (2)

Publication Number Publication Date
NO981650L true NO981650L (no) 1998-04-08
NO981650D0 NO981650D0 (no) 1998-04-08

Family

ID=7774378

Family Applications (1)

Application Number Title Priority Date Filing Date
NO981650A NO981650D0 (no) 1995-10-09 1998-04-08 FremgangsmÕte for bestemmelse av cellulosekokings endepunkt og en anordning for Õ kontrollere cellulosekokingstiden i en reaktor

Country Status (7)

Country Link
EP (1) EP0854953B1 (no)
AT (1) ATE189715T1 (no)
CA (1) CA2234221A1 (no)
DE (1) DE59604434D1 (no)
NO (1) NO981650D0 (no)
WO (1) WO1997013916A2 (no)
ZA (1) ZA968469B (no)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028548A1 (de) * 1997-11-26 1999-06-10 Siemens Aktiengesellschaft Steuereinrichtung für einen kontinuierlich arbeitenden kocher zur herstellung von zellstoff
BRPI0924325B1 (pt) 2009-02-13 2021-10-05 Abb Schweiz Ag Método e sistema para otimização de uma pluralidade de parâmetros de caldeira em um processo de caldeira de recuperação, sistema de controle para processo de papel e polpa e sistema para estimação e predição de uma pluralidade de parâmetros de caldeira

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB747108A (en) * 1953-10-01 1956-03-28 Courtaulds Ltd Improvements in and relating to the production of wood pulp
DE2123497C3 (de) * 1970-05-15 1978-08-03 Mo Och Domsjoe Ab, Oernskoeldsvik (Schweden) Verfahren zur Herstellung von Sulfatpulpen zur Erzielung von Pulpen mit einem vorherbestimmten Maß an Delignifizierung
US3941649A (en) * 1972-07-14 1976-03-02 Mo Och Domsjo Aktiebolag Process for obtaining a predetermined Kappa number in sulfate pulping
US4086129A (en) * 1975-11-03 1978-04-25 International Telephone And Telegraph Corporation Process for controlling the intrinsic viscosity of sulfite pulp
KR880000744B1 (ko) * 1982-11-24 1988-05-04 더 뱁콕 앤드 윌콕스 캄패니 탈리그닌화의 아황산법 증해기에서 증해도를 측정하는 장치
DE3641785A1 (de) * 1986-03-31 1987-10-08 Wolfen Filmfab Veb Verfahren zur herstellung von zellstoff
ATE106477T1 (de) * 1990-03-05 1994-06-15 Siemens Ag Verfahren zur herstellung von zellstoff in einem kontinuierlichen kocher.
DE9017325U1 (de) * 1990-12-21 1992-01-02 Siemens AG, 8000 München Prozeßleitsystem zur Steuerung der Herstellung von Zellstoff
DE59309744D1 (de) * 1992-10-02 1999-09-30 Siemens Ag Steuerverfahren für die Herstellung von Zellstoff durch Druck- und Temperatursteuerung

Also Published As

Publication number Publication date
ZA968469B (en) 1997-04-09
EP0854953B1 (de) 2000-02-09
NO981650D0 (no) 1998-04-08
DE59604434D1 (de) 2000-03-16
WO1997013916A2 (de) 1997-04-17
EP0854953A2 (de) 1998-07-29
ATE189715T1 (de) 2000-02-15
CA2234221A1 (en) 1997-04-17
WO1997013916A3 (de) 1997-07-17

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