WO2014048811A1 - Verfahren zur regelung der formation einer faserstoffbahn eines faser- oder papierherstellungsprozesses - Google Patents
Verfahren zur regelung der formation einer faserstoffbahn eines faser- oder papierherstellungsprozesses Download PDFInfo
- Publication number
- WO2014048811A1 WO2014048811A1 PCT/EP2013/069370 EP2013069370W WO2014048811A1 WO 2014048811 A1 WO2014048811 A1 WO 2014048811A1 EP 2013069370 W EP2013069370 W EP 2013069370W WO 2014048811 A1 WO2014048811 A1 WO 2014048811A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formation
- manipulated variables
- processes
- fiber
- control
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 85
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 61
- 239000000835 fiber Substances 0.000 title claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims description 12
- 238000005457 optimization Methods 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 239000000834 fixative Substances 0.000 claims 1
- 230000002068 genetic effect Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0054—Paper-making control systems details of algorithms or programs
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0027—Paper-making control systems controlling the forming section
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0018—Paper-making control systems controlling the stock preparation
Definitions
- the invention relates to a method for controlling the formation of a fibrous web of a fiber or papermaking process.
- Fibrous webs can also be tissue or board web.
- the fiber or papermaking process consists essentially of a plurality of successive individual process stages in which controllable chemical and / or physical processes or process steps take place as a function of measured values.
- the substances required to form the fibrous web are treated, combined and / or dewatered in the individual process steps.
- the measured values can be recorded inline and used directly or indirectly to control the formation. In addition, the measured values can also be determined offline in the laboratory.
- a particularly important measure in assessing the quality of the fibrous web is the formation, ie the fiber distribution and composition in the web.
- the formation ie the fiber distribution and composition in the web.
- other quality parameters such as printability, surface finish, strength, rigidity, optical quality, etc. can be improved.
- the formation is influenced by various variable influencing variables or manipulated variables such as vacuum, screen tension, etc.
- Each adjustment of a manipulated variable does not only influence the process that it should influence, but also subsequent processes. Adjustments of a process thus cause consequential effects such. B. greater Siebverschl build, more chemicals use, etc. These effects thus always have an impact on the total cost.
- a number of publications are known from the prior art. For example, a method of optimizing formation by altering headbox consistency via lip opening is known. Further arrangements are disclosed in EP 1 454 012 A1 or WO 00/34575.
- One of the objects of the invention is to propose a formation control which pre-conditions the formation in the fibrous web.
- Another object of the invention is to provide a formation control method which makes it possible to stabilize paper machine operation.
- a method is proposed for regulating the formation of a fibrous web of the type mentioned above, in which at least the manipulated variables of the individual processes or processes relevant to the formation are formed in the overall process as a function of definable secondary conditions.
- the formation is influenced by a plurality of successive individual process stages in which controllable chemical and / or physical processes or process steps take place as a function of measured values, wherein at least some of the measured values are recorded inline and used directly or indirectly to control the formation.
- the materials required to form the fibrous web are treated, combined and / or dehydrated.
- the manipulated variables of the individual processes or processes in the overall process are formed as a function of definable secondary conditions Such negative effects can be prevented.
- Subordinate conditions in the sense of the invention therefore mean conditions which define ranges of values which must not be left or which allow an adjustment of the manipulated variables only in a defined range, so that the measured values do not exceed certain limits at the measuring points assigned to the processes. or fall below.
- the manipulated variables can be formed as a function of definable cost functions. A consequence could also be the costs. In this way, the formation or the overall process can be additionally optimized in such a way that the costs are reduced, whereby always the other constraints and finally also the formation must be within certain limits.
- the cost function can also be used to assess the cost of expenditure resulting from the change in the manipulated variables. Furthermore, the cost function can also rate the follow-up costs.
- the secondary conditions can be formed both as a function of the starting materials or raw materials and / or of the chemicals, auxiliaries and energies supplied in the successive process stages as well as the materials and emissions to be disposed of.
- an optimization algorithm can be used by means of which the cost functions are optimized in compliance with the secondary conditions by adjusting all critical manipulated variables, taking into account the secondary conditions and the consequential effects, only to the extent that the formation reaches a target value or formation value.
- the optimization algorithm for compliance with the formation constraints, the influencing manipulated variables of the individual processes or processes in the Total process influenced so that the amount of a possible deviation of the formation is minimized from the target value.
- the optimization algorithm can also be provided with a model which qualitatively reproduces the influence of the manipulated variables on the formation either via a priori prior knowledge or by evaluating the effects of the previous adjustments, whereby the dead times of the processes are advantageously taken into account.
- At least one of the following manipulated variables can be used to control the formation:
- control variables can be used to control the formation: suspension jet geometry
- control variables can be used to control the formation:
- FIG. 1 shows a block diagram for the representation of the formation control
- Figure 2 is a line diagram illustrating the relationships between
- FIG. 1 shows a block diagram for the representation of the formation control with the aid of which the function of the system or the regulation of the formation can be described.
- the system 1 of the formation of a fibrous web of a fiber or papermaking process is dependent on a plurality of successive individual process steps. Thus, in the individual process stages, different controllable chemical and / or physical processes or process steps take place as a function of measured values, in order to treat, combine and / or dewater the substance required for forming the fiber web.
- FIG. 1 The individual process stages which are responsible for formation formation have been summarized in FIG. 1 in block 3.
- the processes or processes can take place in the stock preparation, the wet-end process, the headbox and the former, wherein each process can be influenced by at least one manipulated variable 2.
- manipulated variables a1, a2 reference is made to those already mentioned, although this is not an exhaustive list.
- the secondary conditions have an influence on the formation by forming individual relevant manipulated variables as a function of definable secondary conditions.
- the control strategy can be done using an optimization algorithm that minimizes the cost function while maintaining the constraints.
- the consequential effects 5 result from the individual adjustments of the manipulated variables of the processes.
- the follow-up effects can be measured online or in the lab and directly or indirectly fit into the constraints. In other words, the limits of the constraints are affected by the following conditions.
- follow-up effects can be wear, energy consumption, chemicals consumption, etc.
- FIG. 2 shows a line diagram for representing the relationships between manipulated variables, secondary conditions and costs with respect to a constant formation.
- the parameters that can be adjusted by the control are valued by means of a corresponding price function as cost of expenditure.
- follow-up costs resulting from the adjustable influencing variables are determined.
- the cost function is thus calculated from the total costs of expenses and follow-up costs of setting the formation-relevant manipulated variables. This cost function is minimized via an optimization algorithm, while maintaining the constraints defined above, so that an (iterative) stepwise adjustment change takes place to a cost-optimal operating point, whereby the formation remains within a permissible tolerance band as a controlled variable.
- the optimization algorithm may / may make the adjustments to comply with the formation constraint such that the amount of any deviation of the formation from the set point (range) is minimized (ideally to 0). This can be done using a model that quantitatively reproduces the influence of the manipulated variables on the formation, either through prior knowledge known a priori or through the evaluation of the effects of the previous adjustments. LIST OF REFERENCE NUMBERS
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- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Paper (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/432,242 US20150292158A1 (en) | 2012-09-28 | 2012-09-18 | Method for controlling the formation of a fiber web of a fiber or paper producing process |
CN201380050700.5A CN104704168B (zh) | 2012-09-28 | 2013-09-18 | 控制纤维制造过程或造纸过程的纤维料幅的成型的方法 |
EP13770855.8A EP2900868B1 (de) | 2012-09-28 | 2013-09-18 | Verfahren zur regelung der formation einer faserstoffbahn eines faser- oder papierherstellungsprozesses |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012217729A DE102012217729A1 (de) | 2012-09-28 | 2012-09-28 | Verfahren zur Regelung einer Faserstoffbahnherstellungsmaschine zum Verbessern der Formation |
DE102012217729.9 | 2012-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014048811A1 true WO2014048811A1 (de) | 2014-04-03 |
Family
ID=49232280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2013/069370 WO2014048811A1 (de) | 2012-09-28 | 2013-09-18 | Verfahren zur regelung der formation einer faserstoffbahn eines faser- oder papierherstellungsprozesses |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150292158A1 (zh) |
EP (1) | EP2900868B1 (zh) |
CN (1) | CN104704168B (zh) |
DE (1) | DE102012217729A1 (zh) |
WO (1) | WO2014048811A1 (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150292158A1 (en) * | 2012-09-28 | 2015-10-15 | Voith Patent Gmbh | Method for controlling the formation of a fiber web of a fiber or paper producing process |
DE102016216387A1 (de) | 2016-08-31 | 2018-03-01 | Voith Patent Gmbh | Verfahren zur Steuerung einer Faserstoffbahnherstellungsmaschine |
DE102016120647B4 (de) * | 2016-10-28 | 2018-07-26 | Voith Patent Gmbh | Verfahren zum Betreiben einer Maschine zur Herstellung einer Faserstoffbahn |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003040465A1 (en) * | 2001-11-09 | 2003-05-15 | Metso Automation Oy | Method and apparatus for adjusting operation of wire section |
EP1801288A1 (de) * | 2005-12-24 | 2007-06-27 | Voith Patent GmbH | Verfahren und Anlage zur Herstellung einer Faserstoffbahn |
DE102010041052A1 (de) * | 2010-09-20 | 2012-03-22 | Voith Patent Gmbh | Verfahren zum Regeln der Formation einer Faserstoffbahn |
Family Cites Families (28)
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US3620914A (en) * | 1967-04-28 | 1971-11-16 | Industrial Nucleonics Corp | Headbox jet velocity measuring system and method |
US5812404A (en) * | 1996-04-18 | 1998-09-22 | Valmet Corporation | Method for overall regulation of the headbox of a paper machine or equivalent |
WO1997039182A1 (en) | 1996-04-18 | 1997-10-23 | Valmet Corporation | Method for overall regulation of the headbox and/or the former of a paper machine or equivalent |
US5825653A (en) * | 1997-03-14 | 1998-10-20 | Valmet Corporation | Method for overall regulation of a former of a paper machine or equivalent |
DE19653477C2 (de) | 1996-12-20 | 1999-04-22 | Siemens Ag | Verfahren und Vorrichtung zur Prozeßführung bei der Herstellung von Papier |
DE19736048A1 (de) * | 1997-08-20 | 1999-02-25 | Voith Sulzer Papiermasch Gmbh | Vorrichtung und Verfahren zur Steuerung oder Regelung eines Bahneigenschaftsprofils |
FI974327A (fi) * | 1997-11-25 | 1999-05-26 | Valmet Automation Inc | Menetelmä ja laitteisto paperin ominaisuuksien säätämiseksi |
FI974328A (fi) | 1997-11-25 | 1999-05-26 | Valmet Automation Inc | Menetelmä ja laitteisto paperin ominaisuuksien säätämiseksi |
US6092003A (en) * | 1998-01-26 | 2000-07-18 | Honeywell-Measurex Corporation | Paper stock shear and formation control |
US6076022A (en) * | 1998-01-26 | 2000-06-13 | Honeywell-Measurex Corporation | Paper stock shear and formation control |
US6086716A (en) * | 1998-05-11 | 2000-07-11 | Honeywell-Measurex Corporation | Wet end control for papermaking machine |
DE19835295A1 (de) * | 1998-08-05 | 2000-02-10 | Voith Sulzer Papiertech Patent | Verfahren zur Einstellung eines gleichmäßigen Eigenschaftsquerprofils einer Papierbahn |
FI982625A (fi) | 1998-12-04 | 2000-06-05 | Valmet Automation Inc | Menetelmä ja laitteisto paperin ominaisuuksien säätämiseksi |
DE19910910A1 (de) * | 1999-03-11 | 2000-09-28 | Voith Sulzer Papiertech Patent | Verfahren zur Durchführung eines optimierten Faser- oder Papierherstellungsprozesses |
EP1239074B1 (de) | 2001-03-08 | 2005-08-31 | Voith Paper Patent GmbH | Verfahren zur Erzeugung von satiniertem Papier |
DE10118508A1 (de) * | 2001-04-12 | 2002-10-17 | Voith Paper Patent Gmbh | Verfahren und Anlage zur Herstellung einer Faserstoffbahn |
US20030000669A1 (en) * | 2001-05-11 | 2003-01-02 | Invensys Systems, Inc. | Methods and systems for controlling paper quality by adjusting fiber filter parameters |
FI112682B (fi) | 2002-05-24 | 2003-12-31 | Metso Paper Inc | Menetelmä kuiturainan laatusuureiden säätämiseksi kenkäkalanterissa |
FI20021901A0 (fi) * | 2002-10-24 | 2002-10-24 | Liqum Oy | Menetelmä prosessin valvomiseksi |
DE10305596A1 (de) | 2003-02-11 | 2004-09-02 | Voith Paper Patent Gmbh | Verfahren zum Erstellen einer standardisierten Zustandsanalyse von bei der Herstellung einer Faserstoffbahn die Qualität der herzustellenden Faerstoffbahn beeinflussenden Parametern und/oder Betriebszuständen und Maschine zur Durchführung des Verfahrens |
DE10355687A1 (de) | 2003-11-28 | 2005-06-23 | Voith Paper Patent Gmbh | Verfahren zur Herstellung einer Faserstoffbahn |
US7454253B2 (en) * | 2006-03-30 | 2008-11-18 | Honeywell Asca Inc. | Fast performance prediction of multivariable model predictive controller for paper machine cross-directional processes |
DE102006049026A1 (de) | 2006-10-13 | 2008-04-17 | Voith Patent Gmbh | Vorrichtung und Verfahren zur Herstellung einer Faserstoffbahn |
DE102007025815A1 (de) * | 2007-06-02 | 2008-12-04 | Voith Patent Gmbh | Verfahren und Vorrichtung zur Messung wenigstens einer Qualitätsgröße einer Faserstoffbahn |
DE102007047843A1 (de) * | 2007-11-22 | 2009-05-28 | Voith Patent Gmbh | Vorrichtung mit einem Band und wenigstens einem Sensor zur Bestimmung des Flüssigkeitsgewichtes in einem Bandabschnitt, der keine Stoffsuspension trägt |
DE102007055833A1 (de) * | 2007-12-17 | 2009-06-18 | Voith Patent Gmbh | System und Verfahren zur Regelung wenigstens eines Qualitätsparameters einer Materialbahn, insbesondere einer Faserstoffbahn in einer Papier- und/oder Kartonmaschine |
DE102008040688A1 (de) * | 2008-07-24 | 2010-01-28 | Voith Patent Gmbh | Verfahren zur Optimierung der Energiebilanz in Formiereinheiten in Maschinen zur Herstellung von Faserstoffbahnen und Formiereinheit |
US20150292158A1 (en) * | 2012-09-28 | 2015-10-15 | Voith Patent Gmbh | Method for controlling the formation of a fiber web of a fiber or paper producing process |
-
2012
- 2012-09-18 US US14/432,242 patent/US20150292158A1/en not_active Abandoned
- 2012-09-28 DE DE102012217729A patent/DE102012217729A1/de not_active Withdrawn
-
2013
- 2013-09-18 EP EP13770855.8A patent/EP2900868B1/de active Active
- 2013-09-18 WO PCT/EP2013/069370 patent/WO2014048811A1/de active Application Filing
- 2013-09-18 CN CN201380050700.5A patent/CN104704168B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003040465A1 (en) * | 2001-11-09 | 2003-05-15 | Metso Automation Oy | Method and apparatus for adjusting operation of wire section |
EP1801288A1 (de) * | 2005-12-24 | 2007-06-27 | Voith Patent GmbH | Verfahren und Anlage zur Herstellung einer Faserstoffbahn |
DE102010041052A1 (de) * | 2010-09-20 | 2012-03-22 | Voith Patent Gmbh | Verfahren zum Regeln der Formation einer Faserstoffbahn |
Also Published As
Publication number | Publication date |
---|---|
US20150292158A1 (en) | 2015-10-15 |
EP2900868A1 (de) | 2015-08-05 |
CN104704168B (zh) | 2017-03-08 |
DE102012217729A1 (de) | 2013-10-17 |
CN104704168A (zh) | 2015-06-10 |
EP2900868B1 (de) | 2021-11-10 |
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