JPS6445886A - Continuous digester control apparatus - Google Patents

Continuous digester control apparatus

Info

Publication number
JPS6445886A
JPS6445886A JP20042587A JP20042587A JPS6445886A JP S6445886 A JPS6445886 A JP S6445886A JP 20042587 A JP20042587 A JP 20042587A JP 20042587 A JP20042587 A JP 20042587A JP S6445886 A JPS6445886 A JP S6445886A
Authority
JP
Japan
Prior art keywords
kappa number
stage
control
retention time
temperature
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.)
Pending
Application number
JP20042587A
Other languages
Japanese (ja)
Inventor
Masao Kato
Atsushi Nishimura
Yoshiaki Murakami
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.)
Toyo Pulp Co Ltd
Yokogawa Electric Corp
Original Assignee
Toyo Pulp Co Ltd
Yokogawa Electric Corp
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 Toyo Pulp Co Ltd, Yokogawa Electric Corp filed Critical Toyo Pulp Co Ltd
Priority to JP20042587A priority Critical patent/JPS6445886A/en
Publication of JPS6445886A publication Critical patent/JPS6445886A/en
Pending legal-status Critical Current

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  • Paper (AREA)

Abstract

PURPOSE: To control the temperature of cooking liquor by predicting the H factor needed for the target Kappa number and control the Kappa number with high accuracy by learning and correcting the parameters of the prediction relation and the stage retention time by using the observed Kappa numbers. CONSTITUTION: The temperature profile is retained, as it is corrected, when the mixture of chips and cooking liquor passes through the Kamyr continuous cooking system, every a certain weight (label) of the mixture. The needed prediction H factor after the control stage is obtained from this profile, the effective alkali concentration at the control stage, the stage retention time and the target Kappa number by using the prediction relation. Based on this result, the temperature of the cooking liquor is controlled and simultaneously the exhausted pulp is analyzed to compare the observed Kappa number with the target Kappa number and correct the parameters for the predicting relation and the stage retention time in the so-called learning manner.
JP20042587A 1987-08-11 1987-08-11 Continuous digester control apparatus Pending JPS6445886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20042587A JPS6445886A (en) 1987-08-11 1987-08-11 Continuous digester control apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20042587A JPS6445886A (en) 1987-08-11 1987-08-11 Continuous digester control apparatus

Publications (1)

Publication Number Publication Date
JPS6445886A true JPS6445886A (en) 1989-02-20

Family

ID=16424088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20042587A Pending JPS6445886A (en) 1987-08-11 1987-08-11 Continuous digester control apparatus

Country Status (1)

Country Link
JP (1) JPS6445886A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03227472A (en) * 1990-01-31 1991-10-08 Yokogawa Electric Corp Calculation of h-factor of continuous digester
JPH06101183A (en) * 1992-09-16 1994-04-12 New Oji Paper Co Ltd Computation of raw material retention time on switching kind of raw material in continuous digester for production of pulp, and displaying of retaining position of the raw material in digester

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03227472A (en) * 1990-01-31 1991-10-08 Yokogawa Electric Corp Calculation of h-factor of continuous digester
JPH06101183A (en) * 1992-09-16 1994-04-12 New Oji Paper Co Ltd Computation of raw material retention time on switching kind of raw material in continuous digester for production of pulp, and displaying of retaining position of the raw material in digester

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