EP1035253A1 - Optimized process for fibre or paper manufacturing - Google Patents
Optimized process for fibre or paper manufacturing Download PDFInfo
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- EP1035253A1 EP1035253A1 EP00100843A EP00100843A EP1035253A1 EP 1035253 A1 EP1035253 A1 EP 1035253A1 EP 00100843 A EP00100843 A EP 00100843A EP 00100843 A EP00100843 A EP 00100843A EP 1035253 A1 EP1035253 A1 EP 1035253A1
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- 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
Definitions
- the invention relates to a method for carrying out a fiber or Papermaking process using a plurality of consecutive Process stages in which chemical and physical processes defined process steps carried out and process optimizations depending on the measured values and the values derived from them Parameters, if necessary using state models become.
- the object of the invention is to provide overall processes in the manufacture and Processing of fibrous materials or in papermaking both under technological as well as business and ecological To optimize aspects.
- the final product of the process has relevant parameters of all individual process stages recorded online and directly or indirectly used on-line to control or optimize the overall process be, with parameters both depending on the starting materials or raw materials as well as those in the successive Process stages supplied chemicals, auxiliary materials and energies as well the materials and emissions to be disposed of.
- Embodiment variant of the invention also carried out off-line determinations so that based on the discrete values obtained of calculation models an optimization of the online values in the Framework of an auto calibration module can be performed.
- An essential special feature of the method according to the invention is also to be seen in the fact that not only the determination of the parameters, but also control and regulation or optimization are also carried out on-line, and preferably based on known mathematical or business economics Algorithms based on fuzzy logic and the like
- a further essential aspect of the invention consists in that at least some and preferably all target and characteristic values are transformed on a uniform basis by means of an arithmetic unit, whereby a uniform basis can in particular be a price per unit of quantity determined via a cost or value determination.
- a so-called bottleneck optimization can then also be carried out by converting to a uniform basis. From a business perspective, the bottleneck problem is part of the production planning process. The products are defined by price and quantity. On this basis, a mathematical target function is then defined, which is usually designed to maximize profit or production. However, it is also conceivable to define a function that z. B. aims at a reduced amount of residues (waste) ( f (x 1 + ...
- This actual objective function which can be a maximization function, a minimization function or a combination of both, can be restricted by constraints.
- secondary conditions such.
- a sales condition e.g. sales ceiling
- a capacity condition e.g. capacity bottleneck
- both the objective function and the secondary conditions are not formulated rigidly, but are adapted to the respective conditions and requirements that result from ongoing operation (cf. Hax, H .: linear planning calculation and Simplex method as an instrument of operational planning, in: ZfhF 1960, p 576 ff).
- FIG. 1 which shows this basic illustration, illustrates the context with a relevant input and fiber paper making process Output variables.
- the on-line parameter determination mentioned above takes place, using mechanical methods, physical and / or chemical properties at selected locations of the overall process.
- the raw materials supplied to the overall process are also recorded in the form the entry quantities, whereby - like this also for the other parameters applies - a transformation of these quantities takes place on a uniform basis can, e.g. based on the unit price.
- the target values are usually the production quantities, but according to the invention in turn be transformed on a uniform basis can, so that mechanical properties and optical as a target Properties can be taken into account. For example, this is thereby possible that the achievable price of the finished fiber material and paper as a sum parameter of all optical and mechanical properties or selected properties can be applied.
- the overall process can be both under technological as well as business and ecological Optimize aspects. This also makes it possible for the amount of raw material the chemical costs, the auxiliary material costs, the energy costs, waste and disposal costs are minimized can. It is also possible to use the respective semi-finished or finished products to produce such that the fluctuation range of the technological Characteristic values are reduced significantly.
- sub-processes e.g. the resolution in a waste paper processing plant, Bleaching, sorting, fluctuation and the like first in separate modules are summarized, which are then only a compressed number of Pass on parameters to the overall process.
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Durchführung eines Faser- oder Papierherstellungsprozesses unter Verwendung einer Mehrzahl aufeinanderfolgender Verfahrensstufen, in denen durch vorgebbare chemische und physikalische Abläufe definierte Prozeßschritte durchgeführt und Prozeßoptimierungen in Abhängigkeit von Meßwerten und daraus gebildeten Kenngrößen, ggf. unter Einsatz von Zustandsmodellen, vorgenommen werden.The invention relates to a method for carrying out a fiber or Papermaking process using a plurality of consecutive Process stages in which chemical and physical processes defined process steps carried out and process optimizations depending on the measured values and the values derived from them Parameters, if necessary using state models become.
Bei der Herstellung und Aufbereitung von Faserstoffen und auch bei der Papierherstellung wird üblicherweise eine Mehrzahl von Prozeßstufen hintereinander geschaltet, um am Ende des Gesamtverfahrens das jeweilige Produkt mit einer gewünschten Qualität zu erhalten.In the production and processing of fibrous materials and also in the Paper making typically involves a number of process stages connected in series to the respective at the end of the overall process Obtain a product of the desired quality.
Eine wichtige Verfahrensstufe bei der Herstellung von Papier stellt das Bleichen von Faserstoffen dar, wobei der jeweilige Stoff, bei dem es sich beispielsweise um Holzstoff, Refiner-Stoff und/oder Altpapierstoff handeln kann, Bleichvorgängen unterzogen wird, um die gewünschte Erhöhung des Weißegrades des Stoffes zu erreichen, ohne dabei die Festigkeit des jeweiligen Stoffs unerwünscht zu beeinträchtigen. Da bei der Faserstoffaufbereitung bzw. der Papierherstellung den üblicherweise aus mehreren Stufen bestehenden Bleichvorrichtungen wesentliche Bedeutung hinsichtlich der erzielbaren Qualitäten zukommt, wird in der Praxis bereits versucht, das Bleichverfahren zu optimieren, und es ist auch bereits bekannt, derartige Optimierungen bei Kochverfahren im Zusammenhang mit der Herstellung von Zellstoffen einzusetzen. Bekannt ist es in diesem Zusammenhang insbesondere, Zustandsmodelle und/oder Prozeßmodelle zu verwenden, und zwar auf der Basis erfaßter mechanischer, physikalischer und/oder chemischer Eigenschaften des Faserstoffs oder der Faserstoffsuspension. Anhand solcher Zustands- oder Prozeßmodelle werden Teilprozesse eines Gesamtverfahrens, wie z.B. die Bleichstufe optimiert.This represents an important process step in the production of paper Bleaching fibrous materials, being the particular substance that it is act for example wood pulp, refiner cloth and / or waste paper cloth can undergo bleaching to the desired increase the degree of whiteness of the fabric without losing the strength of the to adversely affect the respective substance. Because in the pulp processing or papermaking which usually consists of several Bleaching devices existing stages essential in terms of the achievable qualities is already in practice tries to optimize the bleaching process and it is already known, such optimizations related to cooking processes use in the manufacture of pulp. It is known in this Relationship in particular, state models and / or process models to be used, based on recorded mechanical, physical and / or chemical properties of the fiber or the fiber suspension. Based on such state or process models Sub-processes of an overall process, such as the bleaching level optimized.
Aufgabe der Erfindung ist es, Gesamtprozesse bei der Herstellung und Aufbereitung von Faserstoffen bzw. bei der Papierherstellung sowohl unter technologischen als auch unter betriebswirtschaftlichen sowie ökologischen Aspekten zu optimieren.The object of the invention is to provide overall processes in the manufacture and Processing of fibrous materials or in papermaking both under technological as well as business and ecological To optimize aspects.
Erreicht wird dies ausgehend von dem eingangs angegebenen Verfahren nach der Erfindung dadurch, daß zumindest die die Zielgrößen des jeweiligen Endprodukts des Verfahrens relevant beeinflussenden Kenngrößen aller einzelnen Verfahrensstufen on-line erfaßt und direkt oder indirekt on-line zur Steuerung bzw. Optimierung des Gesamtverfahrens verwendet werden, wobei Kenngrößen sowohl in Abhängigkeit von den Ausgangsmaterialien bzw. Rohstoffen als auch von den in den aufeinanderfolgenden Verfahrensstufen zugeführten Chemikalien, Hilfsstoffen und Energien sowie den zu entsorgenden Materialien und Emissionen gebildet werden. This is achieved on the basis of the method specified at the beginning according to the invention in that at least the target values of each The final product of the process has relevant parameters of all individual process stages recorded online and directly or indirectly used on-line to control or optimize the overall process be, with parameters both depending on the starting materials or raw materials as well as those in the successive Process stages supplied chemicals, auxiliary materials and energies as well the materials and emissions to be disposed of.
Ergänzend zur On-line-Erfassung von Kenngrößen können nach einer Ausführungsvariante der Erfindung auch Off-line-Bestimmungen durchgeführt werden, so daß anhand der dabei erhaltenen diskreten Werte anhand von Berechnungsmodellen eine Optimierung der On-line-Werte im Rahmen eines Autokalibrierungsmoduls durchgeführt werden kann.In addition to the online recording of parameters, according to a Embodiment variant of the invention also carried out off-line determinations so that based on the discrete values obtained of calculation models an optimization of the online values in the Framework of an auto calibration module can be performed.
Eine wesentliche Besonderheit des Verfahrens nach der Erfindung ist auch darin zu sehen, daß nicht nur die Kenngrößenermittlung, sondern auch die Kontrolle und die Regelung bzw. Optimierung on-line erfolgt, und zwar bevorzugt auf der Basis bekannter mathematischer oder betriebswirtschaftlicher Algorithmen, auf der Basis von Fuzzy-Logik u.dgl.An essential special feature of the method according to the invention is also to be seen in the fact that not only the determination of the parameters, but also control and regulation or optimization are also carried out on-line, and preferably based on known mathematical or business economics Algorithms based on fuzzy logic and the like
Ein weiterer wesentlicher Aspekt der Erfindung besteht darin, daß zumindest
ein Teil und vorzugsweise alle Ziel- und Kenngrößen mittels eines Rechenwerks
auf eine einheitliche Basis transformiert werden, wobei eine
einheitliche Basis insbesondere ein über eine Kosten- bzw. Wertermittlung
bestimmter Preis pro Mengeneinheit sein kann. Durch die Umrechnung
auf eine einheitliche Basis läßt sich dann auch eine sogenannte Engpaßoptimierung
durchführen. Das Engpaßproblem ist aus betriebswirtschaftlicher
Sicht ein Teil des Produktionsplanungsprozesses. Hierbei werden
die Produkte über Preis und Menge definiert. Auf dieser Basis wird dann
eine mathematische Zielfunktion definiert, die in der Regel auf eine Gewinn- oder Produktionsmaximierung ausgelegt ist. Es ist allerdings auch
denkbar, eine Funktion zu definieren, die z. B. eine verringerte Menge an
Reststoffen (Abfall) zum Ziel hat (
Weitere vorteilhafte Ausführungsformen und Merkmale der Erfindung sind in den Unteransprüchen angegeben und werden nachfolgend anhand einer Prinzipdarstellung erläutert.Further advantageous embodiments and features of the invention are specified in the dependent claims and are subsequently based on a Principle illustration explained.
Die diese Prinzipdarstellung zeigende Fig. 1 verdeutlicht die im Zusammenhang mit einem Faser-Papierherstellungsprozeß relevanten Eingangs- und Ausgangsgrößen. Im Rahmen des zu steuernden bzw. zu optimierenden Gesamtverfahrens erfolgt die bereits angesprochene On-line-Kenngrößenermittlung, wozu mittels bekannter Methoden mechanische, physikalische und/oder chemische Eigenschaften an ausgewählten Stellen des Gesamtprozesses erfaßt werden.FIG. 1, which shows this basic illustration, illustrates the context with a relevant input and fiber paper making process Output variables. As part of the process to be controlled or optimized In the overall process, the on-line parameter determination mentioned above takes place, using mechanical methods, physical and / or chemical properties at selected locations of the overall process.
Erfaßt werden auch die dem Gesamtprozeß zugeführten Rohstoffe in Form der Eintragsmengen, wobei - wie dies auch für die anderen Kenngrößen gilt - eine Transformation dieser Größen auf eine einheitliche Basis erfolgen kann, z.B. auf die Basis Preis pro Mengeneinheit. The raw materials supplied to the overall process are also recorded in the form the entry quantities, whereby - like this also for the other parameters applies - a transformation of these quantities takes place on a uniform basis can, e.g. based on the unit price.
Dies gilt auch für die während des Gesamtverfahrens im Zuge der Steuerung und Optimierung zugeführten Chemikalien, Hilfsstoffe, Energien sowie für Frisch- und Ergänzungswasser, wobei die entsprechenden Dosiermengen ebenfalls auf eine einheitliche Basis, nämlich insbesondere auf die Basis Preis pro Mengeneinheit transformierbar sind.This also applies to those during the overall process in the course of the control and optimization of supplied chemicals, auxiliary materials, energies as well for fresh and make-up water, the appropriate dosing quantities also on a uniform basis, namely in particular are transformable on the basis of price per unit of measure.
Charakteristisch für die Erfindung ist auch, daß neben den Zielgrößen auch die zu entsorgenden, im Verlauf des Verfahrens anfallenden Materialien, insbesondere Rejekt, Schlamm und Wasser sowie Emissionen erfaßt und zur Steuerung und Optimierung des Gesamtprozesses verwendet werden. Diese Kenngrößen sind ebenfalls auf eine einheitliche Basis zu transformieren, so daß der pro Mengeneinheit gegebene Preis beispielsweise für Entsorgungskosten und Abwassergebühren berücksichtigbar ist.It is also characteristic of the invention that in addition to the target values also the materials to be disposed of and accumulated in the course of the process, in particular reject, mud and water as well as emissions are recorded and used to control and optimize the overall process become. These parameters are also based on a uniform basis transform so that the price given per unit of measure, for example is considered for disposal costs and wastewater charges.
Die Zielgrößen sind üblicherweise die Produktionsmengen, die aber erfindungsgemäß wiederum auf eine einheitliche Basis transformiert werden können, so daß als Zielgröße auch mechanische Eigenschaften und optische Eigenschaften berücksichtigt werden können. Dies ist beispielsweise dadurch möglich, daß der erzielbare Erlöspreis des fertigen Faserstoffes und Papiers als Summenparameter aller optischen und mechanischen Eigenschaften bzw. ausgewählter Eigenschaften angesetzt werden kann.The target values are usually the production quantities, but according to the invention in turn be transformed on a uniform basis can, so that mechanical properties and optical as a target Properties can be taken into account. For example, this is thereby possible that the achievable price of the finished fiber material and paper as a sum parameter of all optical and mechanical properties or selected properties can be applied.
Durch die Transformierung von Input- bzw. Output-Kenn- bzw. Zielgrößen auf eine einheitliche Basis läßt sich das Gesamtverfahren sowohl unter technologischen als auch unter betriebswirtschaftlichen sowie ökologischen Aspekten optimieren. Dadurch wird es auch möglich, daß die Rohstoffmenge, die Chemikalienkosten, die Hilfsstoffkosten, die Energiekosten, das Abfallaufkommen und die Entsorgungskosten minimiert werden können. Ebenfalls ist es möglich, die jeweiligen Halb- oder Fertigstoffe derart zu produzieren, daß die Schwankungsbreite der technologischen Kennwerte ganz wesentlich reduziert werden.By transforming input or output parameters or target values on a uniform basis, the overall process can be both under technological as well as business and ecological Optimize aspects. This also makes it possible for the amount of raw material the chemical costs, the auxiliary material costs, the energy costs, waste and disposal costs are minimized can. It is also possible to use the respective semi-finished or finished products to produce such that the fluctuation range of the technological Characteristic values are reduced significantly.
Wenn die Zahl der Einflußgrößen im Gesamtmodell reduziert werden soll, können Teilprozesse, z.B. in einer Altpapieraufbereitungsanlage die Auflösung, Bleiche, Sortierung, Fluktuation u.dgl. zuerst in eigenständigen Modulen zusammengefaßt werden, die dann nur eine komprimierte Zahl von Kenngrößen an den Gesamtprozeß weitergeben.If the number of influencing factors in the overall model is to be reduced, sub-processes, e.g. the resolution in a waste paper processing plant, Bleaching, sorting, fluctuation and the like first in separate modules are summarized, which are then only a compressed number of Pass on parameters to the overall process.
Für die Auslegung des Betriebs einer Gesamtanlage ist es auch von wesentlichem Vorteil, daß unter Verwendung von lernfähigen Modellen die unterschiedlichen Einflüsse der In- und Outputs hinsichtlich der jeweiligen Zielgrößen untersucht und berücksichtigt werden können und es auch möglich ist, durch Änderung von Ziel- und Kenngrößen unterschiedliche Szenarien zu überprüfen.It is also essential for the design of the operation of an overall system Advantage that the use of models capable of learning different influences of the inputs and outputs with regard to the respective Target values can be examined and taken into account and there It is also possible to change the target and parameters differently Check scenarios.
Im Falle der Berücksichtigung aller In- und Outputs läßt sich demgemäß nach der Erfindung eine Qualitätssteuerung und Qualitätsregelung erreichen, welche sowohl die Qualität als auch die Wirtschaftlichkeit des betreffenden Verfahrens bzw. Produkts positiv beeinflussen.If all inputs and outputs are taken into account, this can be done accordingly achieve quality control and regulation according to the invention, which both the quality and the economy of the concerned Process or product influence positively.
Claims (9)
dadurch gekennzeichnet,
daß zumindest die die Zielgrößen des jeweiligen Endprodukts des Verfahrens relevant beeinflussenden Kenngrößen aller einzelnen Verfahrensstufen on-line erfaßt und direkt oder indirekt on-line zur Steuerung bzw. Optimierung des Gesamtverfahrens verwendet werden, wobei Kenngrößen sowohl in Abhängigkeit von den Ausgangsmaterialien bzw. Rohstoffen als auch von den in den aufeinanderfolgenden Verfahrensstufen zugeführten Chemikalien, Hilfsstoffen und Energien sowie den zu entsorgenden Materialien und Emissionen gebildet werden. Process for carrying out a fiber or paper production process using a plurality of successive process steps in which process steps defined by predeterminable chemical and physical processes are carried out and process optimizations are carried out as a function of measured values and parameters derived therefrom, possibly using state models,
characterized by
that at least the parameters of all individual process stages that influence the target values of the respective end product of the process are recorded on-line and used directly or indirectly on-line to control or optimize the overall process, with parameters depending on the starting materials or raw materials as well are formed by the chemicals, auxiliary materials and energies supplied in the successive process stages as well as the materials and emissions to be disposed of.
dadurch gekennzeichnet,
daß ergänzend zur On-line-Erfassung von Kenngrößen Off-line-Bestimmungen von Meßwerten und Kenngrößen vorgenommen und anhand der erhaltenen diskreten Werte mittels Berechnungsmodellen Optimierungen der jeweils zugehörigen On-line-Werte vorgenommen werden.Method according to claim 1,
characterized by
that in addition to the on-line recording of parameters, off-line determinations of measured values and parameters are carried out and on the basis of the discrete values obtained, optimization of the respectively associated on-line values is carried out by means of calculation models.
dadurch gekennzeichnet,
daß einzelne Verfahrensstufen oder Teilprozesse zu eigenständig gesteuerten und optimierten Modulen zusammengefaßt werden und eine komprimierte bzw. reduzierte Anzahl von in diesen Modulen gebildeten Kenngrößen zur Steuerung und Optimierung des Gesamtverfahrens verwendet wird.The method of claim 1 or 2,
characterized by
that individual process stages or sub-processes are combined to independently controlled and optimized modules and a compressed or reduced number of parameters formed in these modules are used to control and optimize the overall process.
dadurch gekennzeichnet,
daß zumindest ein Teil der Ziel- und Kenngrößen mittels eines Rechenwerks auf eine einheitliche Basis transformiert wird.Method according to one of the preceding claims,
characterized by
that at least some of the target and characteristic values are transformed on a uniform basis by means of an arithmetic unit.
dadurch gekennzeichnet,
daß als einheitliche Basis der Preis pro Mengeneinheit gewählt wird. Method according to claim 4,
characterized by
that the price per unit of measure is chosen as a uniform basis.
dadurch gekennzeichnet,
daß zumindest ein Teil der Kenngrößen vor ihrer Verwendung zur Steuerung und Optimierung des Gesamtverfahrens gewichtet wird.Method according to one of the preceding claims,
characterized by
that at least some of the parameters are weighted before they are used to control and optimize the overall process.
dadurch gekennzeichnet,
daß unter Verwendung der auf eine einheitliche Basis transformierten Kenngrößen im Gesamtverfahren eine Engpaßoptimierung durchgeführt wird.Method according to one of the preceding claims,
characterized by
that a bottleneck optimization is carried out in the overall process using the parameters transformed on a uniform basis.
dadurch gekennzeichnet,
daß die Ermittlung der Kenngrößen aus den On-line-Meßwerten unter Verwendung mathematischer oder betriebswirtschaftlicher Algorithmen erfolgt.Method according to one of the preceding claims,
characterized by
that the parameters are determined from the on-line measured values using mathematical or business algorithms.
dadurch gekennzeichnet,
daß als Zielgrößen insbesondere Produktionsmengen, mechanische und/oder optische Eigenschaften und/oder der Faserstoff- oder Papierpreis vorgegeben werden.Method according to one of the preceding claims,
characterized by
that in particular production quantities, mechanical and / or optical properties and / or the fiber or paper price are specified as target values.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19910910 | 1999-03-11 | ||
| DE19910910A DE19910910A1 (en) | 1999-03-11 | 1999-03-11 | Process for carrying out an optimized fiber or paper production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1035253A1 true EP1035253A1 (en) | 2000-09-13 |
| EP1035253B1 EP1035253B1 (en) | 2005-11-23 |
Family
ID=7900633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00100843A Expired - Lifetime EP1035253B1 (en) | 1999-03-11 | 2000-01-17 | Optimized process for fibre or paper manufacturing |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6577916B1 (en) |
| EP (1) | EP1035253B1 (en) |
| KR (1) | KR20000062824A (en) |
| AT (1) | ATE310849T1 (en) |
| BR (1) | BR0001281A (en) |
| CA (1) | CA2298333A1 (en) |
| DE (2) | DE19910910A1 (en) |
| ES (1) | ES2249202T3 (en) |
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| WO2003107103A1 (en) * | 2002-06-12 | 2003-12-24 | Abb Ab | Dynamic on-line optimization of production processes |
| US7083049B2 (en) | 2001-12-10 | 2006-08-01 | Voith Paper Patent Gmbh | Method of regulating sorting systems and a sorting system suitable for carrying out this method |
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| WO2003060812A2 (en) * | 2002-01-15 | 2003-07-24 | Suvajit Das | Computer-implemented system and method for measuring and improving manufacturing processes and maximizing product research and development speed and efficiency |
| US7376472B2 (en) * | 2002-09-11 | 2008-05-20 | Fisher-Rosemount Systems, Inc. | Integrated model predictive control and optimization within a process control system |
| US7016742B2 (en) * | 2002-11-27 | 2006-03-21 | Bahelle Memorial Institute | Decision support for operations and maintenance (DSOM) system |
| US7451004B2 (en) * | 2005-09-30 | 2008-11-11 | Fisher-Rosemount Systems, Inc. | On-line adaptive model predictive control in a process control system |
| DE102006003637A1 (en) * | 2006-01-26 | 2007-08-02 | Voith Patent Gmbh | Process for producing or treating a fibrous web |
| FI119063B (en) * | 2006-04-21 | 2008-07-15 | Metso Automation Oy | Procedure for controlling a recycled fiber line and recycled fiber line |
| CA2691128C (en) * | 2007-05-04 | 2014-04-29 | Feng Ding | System and method for optimizing lignocellulosic granular matter refining |
| DE102009011217A1 (en) * | 2009-03-04 | 2010-09-09 | Siemens Aktiengesellschaft | Control of the extended dryer section of a paper machine |
| CA2714235C (en) | 2010-04-27 | 2014-01-07 | Centre De Recherche Industrielle Du Quebec | Method and system for stabilizing dry-based density of wood chips to be fed to a chip refining process |
| 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 |
| CN111967180B (en) * | 2020-07-02 | 2022-07-26 | 华南理工大学 | Quantitative analysis method for influence degree of papermaking fiber characteristics on mechanical properties of finished paper |
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| DE19510008C2 (en) * | 1995-03-23 | 1997-01-30 | Siemens Ag | Process and device for process control in pulp and / or paper production |
| DE19519627C2 (en) * | 1995-05-29 | 1999-04-29 | Siemens Ag | Process for optimizing the process control of production processes |
| US5812404A (en) * | 1996-04-18 | 1998-09-22 | Valmet Corporation | Method for overall regulation of the headbox of a paper machine or equivalent |
| DE19653530C1 (en) * | 1996-12-20 | 1998-07-23 | Siemens Ag | Process and device for process control and process optimization in the production of pulp |
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- 1999-03-11 DE DE19910910A patent/DE19910910A1/en not_active Withdrawn
-
2000
- 2000-01-17 EP EP00100843A patent/EP1035253B1/en not_active Expired - Lifetime
- 2000-01-17 ES ES00100843T patent/ES2249202T3/en not_active Expired - Lifetime
- 2000-01-17 DE DE50011667T patent/DE50011667D1/en not_active Expired - Lifetime
- 2000-01-17 AT AT00100843T patent/ATE310849T1/en active
- 2000-02-09 CA CA002298333A patent/CA2298333A1/en not_active Abandoned
- 2000-03-10 BR BR0001281-5A patent/BR0001281A/en not_active Application Discontinuation
- 2000-03-10 KR KR1020000012058A patent/KR20000062824A/en not_active Application Discontinuation
- 2000-03-10 US US09/522,536 patent/US6577916B1/en not_active Expired - Lifetime
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7083049B2 (en) | 2001-12-10 | 2006-08-01 | Voith Paper Patent Gmbh | Method of regulating sorting systems and a sorting system suitable for carrying out this method |
| WO2003107103A1 (en) * | 2002-06-12 | 2003-12-24 | Abb Ab | Dynamic on-line optimization of production processes |
| US7085615B2 (en) | 2002-06-12 | 2006-08-01 | Abb Ab | Dynamic on-line optimization of production processes |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50011667D1 (en) | 2005-12-29 |
| DE19910910A1 (en) | 2000-09-28 |
| ES2249202T3 (en) | 2006-04-01 |
| US6577916B1 (en) | 2003-06-10 |
| BR0001281A (en) | 2001-01-16 |
| CA2298333A1 (en) | 2000-09-11 |
| EP1035253B1 (en) | 2005-11-23 |
| ATE310849T1 (en) | 2005-12-15 |
| KR20000062824A (en) | 2000-10-25 |
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