JPS6445886A - Continuous digester control apparatus - Google Patents
Continuous digester control apparatusInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-08-11 JP JP20042587A patent/JPS6445886A/en active Pending
Cited By (2)
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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