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NO981172L - Method and apparatus for monitoring cellulose boiling - Google Patents

Method and apparatus for monitoring cellulose boiling

Info

Publication number
NO981172L
NO981172L NO981172A NO981172A NO981172L NO 981172 L NO981172 L NO 981172L NO 981172 A NO981172 A NO 981172A NO 981172 A NO981172 A NO 981172A NO 981172 L NO981172 L NO 981172L
Authority
NO
Norway
Prior art keywords
boiling
monitoring
line measurement
cooking
cellulose
Prior art date
Application number
NO981172A
Other languages
Norwegian (no)
Other versions
NO981172D0 (en
Inventor
Klaus Fischer
Herbert Furumoto
Uwe Lampe
Ingeborg Schmidt
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 NO981172D0 publication Critical patent/NO981172D0/en
Publication of NO981172L publication Critical patent/NO981172L/en

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
    • 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
    • D21C3/228—Automation of the pulping processes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/34—Paper
    • G01N33/343—Paper pulp

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

Ved cellulosekoking er fastleggelse av sluttpunktet for koketiden avgjørende for produktkvaliteten og/eller produktutbyttet. Dette utføres ifølge oppfinnelsen gjennom en in-line-måling av pH- verdien og eventuelt farven av kokesyren under kokingen. Fremgangsmåten kan anvendes ved diskontinuerlig såvel som ved kontinuerlig arbeidende cellulosekokere. En anordning til utførelse av fremgangsmåten med egnede sensorer til on-line-måling av minst pH-verdien har en evalueringsinnretning med en regneanordning (70) som fastslår koketiden fra måleverdier resp. disses tidsmessige forløp.In cellulosic cooking, determining the end point of the cooking time is crucial for product quality and / or product yield. This is carried out according to the invention through an in-line measurement of the pH and optionally the color of the boiling acid during the boiling. The process can be used with discontinuous as well as with continuously operating cellulose boilers. An apparatus for carrying out the method with suitable sensors for on-line measurement of at least the pH value has an evaluation device with a calculator (70) which determines the boiling time from the measured values respectively. their temporal course.

NO981172A 1995-09-15 1998-03-16 Method and apparatus for monitoring cellulose boiling NO981172L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19534377 1995-09-15
PCT/DE1996/001720 WO1997010384A2 (en) 1995-09-15 1996-09-12 Process and arrangement for monitoring cellulose digestion

Publications (2)

Publication Number Publication Date
NO981172D0 NO981172D0 (en) 1998-03-16
NO981172L true NO981172L (en) 1998-05-14

Family

ID=7772349

Family Applications (1)

Application Number Title Priority Date Filing Date
NO981172A NO981172L (en) 1995-09-15 1998-03-16 Method and apparatus for monitoring cellulose boiling

Country Status (5)

Country Link
EP (1) EP0850333A2 (en)
CA (1) CA2232171A1 (en)
NO (1) NO981172L (en)
WO (1) WO1997010384A2 (en)
ZA (1) ZA967695B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6235123B1 (en) 1998-05-04 2001-05-22 Honeywell-Measorek Corporation Chemical cleaning system for electrodes used in a liquid environment
DE10041077A1 (en) * 2000-08-22 2002-03-21 Siemens Ag Process control process in pulp production
DE10350075A1 (en) * 2003-10-27 2005-06-09 Siemens Ag Process and device for process control in the pulp cooking

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630832A (en) * 1969-11-10 1971-12-28 Int Paper Canada Controlled alkaline sulfite pulping
DE3437619A1 (en) * 1984-10-13 1986-04-17 Pfaudler-Werke Ag, 6830 Schwetzingen MEASURING PROBE
CA1277110C (en) * 1986-05-07 1990-12-04 Rudolf Patt Method for cooking control of lignocelluloses by ftir spectroscopy
DE9017325U1 (en) * 1990-12-21 1992-01-02 Siemens AG, 8000 München Process control system for controlling pulp production
DE4118507A1 (en) * 1991-06-06 1992-12-10 Thale Eisen Huettenwerk Measurement arrangement for pH value or redox potential - has enamelled probe carrier in enamelled container with short life probe parts replaceable at low cost
US5420682A (en) * 1993-07-02 1995-05-30 Honeywell Inc. Method and apparatus for compensating spectral data with a color sensor

Also Published As

Publication number Publication date
ZA967695B (en) 1997-03-17
CA2232171A1 (en) 1997-03-20
WO1997010384A3 (en) 1997-05-09
NO981172D0 (en) 1998-03-16
WO1997010384A2 (en) 1997-03-20
EP0850333A2 (en) 1998-07-01

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application