EP1318229B1 - Method for controlling sorting systems and sorting system for using the method - Google Patents
Method for controlling sorting systems and sorting system for using the method Download PDFInfo
- Publication number
- EP1318229B1 EP1318229B1 EP02024605A EP02024605A EP1318229B1 EP 1318229 B1 EP1318229 B1 EP 1318229B1 EP 02024605 A EP02024605 A EP 02024605A EP 02024605 A EP02024605 A EP 02024605A EP 1318229 B1 EP1318229 B1 EP 1318229B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sorter
- sorting system
- sorting
- accordance
- fine fraction
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 27
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 239000000725 suspension Substances 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000013178 mathematical model Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- D21G9/0018—Paper-making control systems controlling the stock preparation
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
Definitions
- the invention relates to a method for controlling multistage sorting systems in papermaking according to the preamble of claim 1 and to a sorting system suitable for carrying out this method.
- a method and sorting system are known from EP-A-0 931 873.
- Sorting systems for paper production serve to divide a pulp suspension into at least two fractions, namely a so-called fine fraction and a so-called coarse fraction.
- the fine fraction consists of a large part of the water contained in the pulp suspension and as many paper fibers, while the coarse fraction, i. the fraction which can not pass through the screens used in the respective sorters of the sorting system, should contain as few fibers as possible and as far as possible all interfering impurities.
- the highest possible purity of the final fine fraction the lowest possible fiber loss, i. minimum fiber content in the coarse fraction, as well as the largest possible production amount sought, which is understood under production or production volume, the amount of accepts received.
- a particular problem associated with the achievement of this objective stems mainly from fluctuations in the quality of raw materials, which can be negatively caused by larger volumes of advertising leaflets in newspapers, and in a positive sense by falling commodity prices, which encourages the processing of materials lead to an above-average quality of raw materials.
- These issues make it difficult to control sorting systems of a known type such that a certain target size, such as e.g. Efficiency or minimum fiber loss is achieved.
- the object of the invention is to optimize a method of the type indicated in the preamble of claim 1 in such a way that, on the one hand, the abovementioned objectives of a good sorting method can be achieved in the best possible way and, on the other hand, predefinable target variables, e.g. Efficiency and fiber loss can be specified and fluctuations in the quality of the raw materials can be taken into account.
- predefinable target variables e.g. Efficiency and fiber loss can be specified and fluctuations in the quality of the raw materials can be taken into account.
- the sorting system can be modeled by a linear system of equations, in which case this model, by implementing a state controller, is used according to the invention to drive the system in the optimum operating state.
- Fig. 1 shows an example of how certain selectable parameters of sorters affect the purity of the fine fraction or the accept.
- the overflow parameter refers to the amount of reject that can be set during operation of the sorter, measured volumetrically here.
- the slot width refers to the strainer of the sorter used.
- Profile angle is the angle at which the top edge of a screen is inclined relative to the circumference. A large profile angle corresponds to a relatively strong turbulence in the inlet region of the slotted screen, which means on the one hand a higher throughput, but on the other hand, a lower purity of the accept.
- the slot speed refers to the suspension as it passes through the slot. It results essentially from the entire slot area and from the volume flow pumped through the sorting machine.
- the speed is the speed of the rotor of a sorter, which is provided for Siebzynnen and preferably can be operated at different speeds.
- Fig. 2 shows a diagram of an embodiment of the invention performing, three-stage sorting system.
- the parameters that can be influenced during operation have overflow quantity and slot speed a considerable influence on the system efficiency.
- Such correlations are decisive for the fact that the sorting system can be mathematically modeled by a linear system of equations and, using such a model in a state controller, the respective system can be driven in the desired optimum operating state.
- the sorting system shown as an example in FIG. 2 has a three-stage design and is regulated by a state controller 25 during operation.
- the plant comprises a first sorter 1, in which a sieve 2 is located.
- the screen contains a multiplicity of openings, which are designed in such a way that part of the inflowing pulp suspension S as fine fraction F can pass through the openings, while a coarse fraction G is rejected.
- the feed of the suspension S takes place via a pump 24.
- a flow sensor 7 and a control valve 8 are arranged, and a corresponding flow sensor 6 and a corresponding control valve 4 are provided in the output line for the coarse fraction ,
- the flow sensors 6, 7 deliver their signals to the state controller 25, while the control valves 4, 8 receive their control signals from the state controller 25.
- the coarse fraction G of the first sorter 1 is fed via a collecting unit 3 and a pump 24 to a second sorter 9 with a sieve 10. Also in this sorter 9, a flow sensor 13 and a control valve 14 are disposed in the fine fraction outlet line, and a flow sensor 11 and a control valve 12 are provided in the coarse flow outlet line, the sensors in turn providing their signals to the state controller 25 and the control valves 12, 14 are controlled by the state controller 25.
- the coarse fraction of the second sorter 9 passes through a collection unit 3 and a pump 24 to a third sorter 15 having a separation screen 16.
- this third sorter 15 that both in the output line for the fine fraction and in the output line for the coarse fraction each have a flow sensor 20 and 17 and a control valve 21 and 18 are provided, again in an analogous manner to the previous sorters the flow sensors provide their measurement signals to the state controller 25, while the control valves 21 and 18 of this State controller 25 are controlled or regulated.
- the fine fraction of the third sorter 15 is fed via the collecting unit 3 and the pump 24 to the second sorter 9, which also receives the coarse fraction of the first sorter via the collecting unit 3.
- the target variable efficiency or acceptable quality can also be detected via an online quality sensor 5, whose output signals are fed to the state controller 25 for further processing. But this is not mandatory. Meaningful regulation or control is also possible because the operator specifies qualitatively whether he wants to drive a higher quality or a higher production.
- Fig. 3 shows a particularly preferred embodiment of the invention, which differs from the embodiment of FIG. 2 in that the return RC is not provided on the first sorter, but rather on the second sorter 9 of the system shown.
- a flow sensor 22 'and a control valve 23' is analogous to the embodiment of FIG. 2, the flow sensor 22 'provides its output signals to the state controller 25, while the control valve 23' its control or control signals from the state controller 25th receives.
- the use of a return RC in a higher level of the overall arrangement, as in the embodiment of FIG. 3 in connection with the stage 9, is therefore particularly advantageous because in these stages, the pollution load is already greater and thus the return can develop the best possible effectiveness.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Sorting Of Articles (AREA)
- Discharge Of Articles From Conveyors (AREA)
- Branching, Merging, And Special Transfer Between Conveyors (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Regelung von mehrstufigen Sortiersystemen bei der Papiererzeugung gemäß dem Oberbegriff des Anspruchs 1 sowie ein zur Durchführung dieses Verfahrens geeignetes Sortiersystem. Ein derartiges Verfahren und ein derartiges Sortiersystem sind aus der EP-A-0 931 873 bekannt.The invention relates to a method for controlling multistage sorting systems in papermaking according to the preamble of
Sortiersysteme für die Papiererzeugung dienen dazu, eine Faserstoffsuspension in mindestens zwei Fraktionen aufzuteilen, nämlich in eine so genannte Feinfraktion und eine so genannte Grobfraktion. Die Feinfraktion besteht dabei aus einem großen Teil des in der Faserstoffsuspension enthaltenen Wassers sowie aus möglichst vielen Papierfasern, während die Grobfraktion, d.h. die Fraktion, welche die in den jeweiligen Sortierern des Sortiersystems verwendeten Siebe nicht passieren kann, möglichst wenig Fasern und möglichst alle störenden Verunreinigungen enthalten soll.Sorting systems for paper production serve to divide a pulp suspension into at least two fractions, namely a so-called fine fraction and a so-called coarse fraction. The fine fraction consists of a large part of the water contained in the pulp suspension and as many paper fibers, while the coarse fraction, i. the fraction which can not pass through the screens used in the respective sorters of the sorting system, should contain as few fibers as possible and as far as possible all interfering impurities.
Da die störenden und zu entfernenden Verunreinigungen ein breites Größenspektrum besitzen, lässt es sich nicht vermeiden, dass die von kleineren und kleinsten Teilchen gebildeten Verunreinigungen zusammen mit den Fasern in die Feinfraktion gelangen. Um den Anteil von Verunreinigungen in der Feinfraktion zu minimieren und möglichst zu verhindern, dass in der am Ausgang einer Sortieranlage erhaltenen Feinfraktion überhaupt noch Störstoffe vorhanden sind, wurden aufwendige Sortierverfahren entwickelt, die Anlagen mit einer größeren Anzahl von Sortierern erfordern, die in Reihe und/oder parallel geschaltet sein können. Es hat sich jedoch gezeigt, dass der Erfolg einer Sortieranlage nicht nur durch die Anzahl der verwendeten Sortierapparate und deren Qualität bestimmt wird, sondern vor allem auch durch die verfahrenstechnische Gestaltung des Sortierverfahrens selbst.Since the interfering and removing impurities have a wide range of sizes, it can not be avoided that the impurities formed by smaller and smallest particles get into the fine fraction together with the fibers. In order to minimize the proportion of impurities in the fine fraction and to prevent as far as possible the presence of impurities in the fine fraction obtained at the exit of a sorting plant, elaborate sorting methods have been developed which require installations with a larger number of sorters which are arranged in series and / or or can be connected in parallel. However, it has been shown that the success of a sorting system not only by the Number of sorters used and their quality is determined, but especially by the procedural design of the sorting process itself.
Bei jedem hochwertigen Sortierverfahren wird eine möglichst große Reinheit der am Ende gewonnenen Feinfraktion, ein möglichst geringer Faserverlust, d.h. minimale Faseranteile in der Grobfraktion, sowie eine möglichst große Produktionsmenge angestrebt, wobei unter Produktion bzw. Produktionsmenge die erhaltene Gutstoffmenge verstanden wird.In each high-quality sorting process, the highest possible purity of the final fine fraction, the lowest possible fiber loss, i. minimum fiber content in the coarse fraction, as well as the largest possible production amount sought, which is understood under production or production volume, the amount of accepts received.
Eine besondere Problematik im Zusammenhang mit der Erreichung dieser Zielsetzung resultiert vor allem aus Schwankungen der Rohstoffqualität, die im negativen Sinne verursacht werden kann durch größere Mengen an in Zeitungen eingelegte Werbeprospekte, und im positiven Sinne durch fallende Rohstoffpreise, was die Verarbeitung von Materialien fördert, die zu einer überdurchschnittlich hohen Rohstoffqualität führen. Diese Sachverhalte erschweren es, Sortiersysteme bekannter Art so zu steuern oder zu regeln, dass eine bestimmte Zielgröße, wie z.B. Wirkungsgrad oder minimaler Faserverlust, erreicht wird.A particular problem associated with the achievement of this objective stems mainly from fluctuations in the quality of raw materials, which can be negatively caused by larger volumes of advertising leaflets in newspapers, and in a positive sense by falling commodity prices, which encourages the processing of materials lead to an above-average quality of raw materials. These issues make it difficult to control sorting systems of a known type such that a certain target size, such as e.g. Efficiency or minimum fiber loss is achieved.
Aufgabe der Erfindung ist es, ein Verfahren von der im Oberbegriff des Anspruchs 1 angegebenen Art so zu optimieren, dass einerseits die vorstehend erwähnten Ziele eines guten Sortierverfahrens bestmöglich erreicht werden können und andererseits bei der durchgeführten Regelung vorgebbare Zielgrößen wie z.B. Wirkungsgrad und Faserverlust vorgegeben und dabei Schwankungen der Rohstoffqualität berücksichtigt werden können.The object of the invention is to optimize a method of the type indicated in the preamble of
Gelöst wird diese Aufgabe durch die im Patentanspruch 1 angegebenen Merkmale.This problem is solved by the features specified in
Wesentlich für die Erfindung ist dabei, dass über online-Messungen und/oder Berechnungen eine vollständige Bilanzierung der Massenströme in allen Sortierern durchgeführt und davon Gebrauch gemacht wird, dass die Abhängigkeiten der Zielgrößen, wie z.B. Wirkungsgrad und Faserverlust, von den Betriebsparametern bekannt sind und sich durch Gleichungen beschreiben lassen. Das Sortiersystem kann aus diesem Grunde durch ein lineares Gleichungssystem modelliert werden, wobei dann dieses Modell durch Implementierung eines Zustandsreglers erfindungsgemäß dazu genutzt wird, die Anlage im optimalen Betriebszustand zu fahren.It is essential for the invention that, via online measurements and / or calculations, a complete balancing of the mass flows in all sorters is carried out and it is made use of that the dependencies of the target quantities, such as e.g. Efficiency and fiber loss, are known from the operating parameters and can be described by equations. For this reason, the sorting system can be modeled by a linear system of equations, in which case this model, by implementing a state controller, is used according to the invention to drive the system in the optimum operating state.
Durch das dem Sortiersystem auf diese Weise übergeordnete Regelkonzept können beispielsweise neben der Zielgröße "Produktion" auch bezüglich der Zielgrößen "Wirkungsgrad" und "Faserverlust" über den Zustandsregler Vorgaben durch das Bedienpersonal gemacht werden. Diese Vorgaben werden dann durch die erfindungsgemäß realisierte Regelung in Stellgrößen für die Regelventile so umgesetzt, dass das Sortiersystem entsprechend den Vorgaben optimal läuft.
Von besonderem Vorteil ist dabei, dass nicht nur die Regelventile über den Zustandsregler beeinflusst werden können, sondern dass beispielsweise dann, wenn ein minimaler Faserverlust angestrebt wird, auch Maschinenparameter beeinflusst werden können, wie z.B. die Rotordrehzahl eines Sortierers über einen Frequenzumrichter.By the sorting system in this way superordinate control concept, for example, in addition to the target size "production" also with respect to the target variables "efficiency" and "fiber loss" on the state controller specifications by the operator are made. These specifications are then implemented by the inventively realized control in manipulated variables for the control valves so that the sorting system runs optimally according to the specifications.
Of particular advantage is that not only the control valves can be influenced by the state controller, but that, for example, when a minimum fiber loss is sought, and machine parameters can be influenced, such as the rotor speed of a sorter via a frequency converter.
Weitere besonders vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens sowie eines auch zur Durchführung des erfindungsgemäßen Verfahrens geeignetes Sortiersystem sind in den Unteransprüchen beschrieben und werden anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung erläutert. In der Zeichnung zeigt:
- Fig. 1
- ein Diagramm zur Erläuterung des Einflusses der Maschinenparameter auf das Sortierergebnis gemäß einem Beispiel,
- Fig. 2
- ein Diagramm zur Erläuterung eines Ausführungsbeispiels eines erfindungsgemäßen Sortiersystems, und
- Fig. 3
- eine bevorzugte Ausführungsvariante des Beispiels nach Fig. 2.
- Fig. 1
- a diagram for explaining the influence of the machine parameters on the sorting result according to an example,
- Fig. 2
- a diagram for explaining an embodiment of a sorting system according to the invention, and
- Fig. 3
- a preferred embodiment of the example of FIG. 2.
Fig. 1 zeigt an einem Beispiel, wie sich bestimmte wählbare Parameter von Sortierern auf die Reinheit der Feinfraktion bzw. des Gutstoffes auswirken.Fig. 1 shows an example of how certain selectable parameters of sorters affect the purity of the fine fraction or the accept.
Auf der Ordinate dieser Darstellung ist die Sticky-Fläche in der Feinfraktion (Gutstoff) aufgetragen. Eine zunehmende Sticky-Fläche im Gutstoff bedeutet dabei ein geringere Reinheit.On the ordinate of this representation, the sticky surface in the fine fraction (Acceptance) is applied. An increasing sticky area in the accepted product means less purity.
Auf der Abszisse sind verschiedene Parameter eingetragen.
Der den Überlauf betreffende Parameter betrifft die bei Betrieb des Sortierers einstellbare Menge des Rejects, hier volumetrisch gemessen. Die Schlitzweite bezieht sich auf den Siebkorb des verwendeten Sortierers. Unter Profilwinkel ist der Winkel zu verstehen, in dem die Oberkante eines Siebstabes gegenüber dem Umfang geneigt ist. Ein großer Profilwinkel entspricht dabei einer relativ starken Verwirbelung im Einlaufbereich des Schlitzsiebes, was einerseits einen höheren Durchsatz, andererseits aber eine geringere Reinheit des Gutstoffs bedeutet.
Die Schlitzgeschwindigkeit bezieht sich auf die Suspension beim Durchtritt durch den Schlitz. Sie resultiert im wesentlichen aus der gesamten Schlitzfläche und aus dem durch die Sortiermaschine gepumpten Volumenstrom.On the abscissa various parameters are entered.
The overflow parameter refers to the amount of reject that can be set during operation of the sorter, measured volumetrically here. The slot width refers to the strainer of the sorter used. Profile angle is the angle at which the top edge of a screen is inclined relative to the circumference. A large profile angle corresponds to a relatively strong turbulence in the inlet region of the slotted screen, which means on the one hand a higher throughput, but on the other hand, a lower purity of the accept.
The slot speed refers to the suspension as it passes through the slot. It results essentially from the entire slot area and from the volume flow pumped through the sorting machine.
Die Drehzahl ist die Drehzahl des Rotors eines Sortierers, der zur Siebfreihaltung vorgesehen ist und vorzugsweise mit unterschiedlichen Drehzahlen betrieben werden kann.The speed is the speed of the rotor of a sorter, which is provided for Siebfreihaltung and preferably can be operated at different speeds.
Im rechten Teil der Fig. 1 is als Beispiel eine Referenzeinstellung angegeben.In the right part of Fig. 1 is given as an example a reference setting.
Fig. 2 zeigt ein Diagramm einer ein Ausführungsbeispiel der Erfindung darstellenden, dreistufigen Sortieranlage.Fig. 2 shows a diagram of an embodiment of the invention performing, three-stage sorting system.
Wie anhand der Fig. 1 zu sehen ist, haben die im Betrieb beeinflussbaren Parameter Überlaufmenge und Schlitzgeschwindigkeit einen erheblichen Einfluss auf den Systemwirkungsgrad. Vergleichbares gilt für den Faserverlust bzw. Eindickfaktor. Derartige Zusammenhänge sind maßgeblich dafür, dass das Sortiersystem durch ein lineares Gleichungssystem mathematisch modelliert werden kann und unter Verwendung eines solchen Modells in einem Zustandsregler die jeweilige Anlage im gewünschten optimalen Betriebszustand gefahren werden kann.As can be seen with reference to FIG. 1, the parameters that can be influenced during operation have overflow quantity and slot speed a considerable influence on the system efficiency. The same applies to the fiber loss or thickening factor. Such correlations are decisive for the fact that the sorting system can be mathematically modeled by a linear system of equations and, using such a model in a state controller, the respective system can be driven in the desired optimum operating state.
Die in Fig. 2 als Beispiel dargestellte Sortieranlage ist dreistufig aufgebaut und wird über einen Zustandsregler 25 im Betrieb geregelt.The sorting system shown as an example in FIG. 2 has a three-stage design and is regulated by a
Die Anlage umfasst einen ersten Sortierer 1, in dem sich ein Sieb 2 befindet. Das Sieb enthält eine Vielzahl von Öffnungen, welche so gestaltet sind, dass ein Teil der einströmenden Faserstoffsuspension S als Feinfraktion F die Öffnungen passieren kann, während eine Grobfraktion G abgewiesen wird.The plant comprises a
Die Zuführung der Suspension S erfolgt über eine Pumpe 24. In der Ausgangsleitung für die Feinfraktion F ist ein Durchfluss-Sensor 7 sowie ein Stellventil 8 angeordnet, und ein entsprechender Durchfluss-Sensor 6 und ein entsprechendes Stellventil 4 sind in der Ausgangsleitung für die Grobfraktion vorgesehen.The feed of the suspension S takes place via a pump 24. In the outlet line for the fine fraction F, a flow sensor 7 and a
Die Durchfluss-Sensoren 6, 7 liefern ihre Signale an den Zustandsregler 25, während die Stellventile 4, 8 ihre Steuer- bzw. Regelsignale vom Zustandsregler 25 erhalten.The flow sensors 6, 7 deliver their signals to the
Die Grobfraktion G des ersten Sortierers 1 wird über eine Sammeleinheit 3 und eine Pumpe 24 einem zweiten Sortierer 9 mit Sieb 10 zugeführt. Auch bei diesem Sortierer 9 sind in der Auslassleitung für die Feinfraktion ein Durchfluss-Sensor 13 und ein Stellventil 14 und in der Auslassleitung für die Grobfunktion ein Durchfluss-Sensor 11 und ein Stellventil 12 angeordnet, wobei die Sensoren wiederum ihre Signale an den Zustandsregler 25 liefern und die Stellventile 12, 14 vom Zustandsregler 25 gesteuert bzw. geregelt werden.The coarse fraction G of the
Während die Feinfraktion des zweiten Sortierers 9 der Ausgangsleitung für die Feinfraktion F des ersten Sortierers 1 zugeführt wird, gelangt die Grobfraktion des zweiten Sortierers 9 über eine Sammeleinheit 3 und eine Pumpe 24 zu einem dritten Sortierer 15 mit Trennsieb 16.While the fine fraction of the
Auch für diesen dritten Sortierer 15 gilt, dass sowohl in der Ausgangsleitung für die Feinfraktion als auch in der Ausgangsleitung für die Grobfraktion jeweils ein Durchfluss-Sensor 20 bzw. 17 und ein Stellventil 21 bzw. 18 vorgesehen sind, wobei wiederum in analoger Weise zu den vorhergehenden Sortierern die Durchfluss-Sensoren ihre Messsignale an den Zustandsregler 25 liefern, während die Stellventile 21 und 18 von diesem Zustandsregler 25 gesteuert bzw. geregelt werden. Die Feinfraktion des dritten Sortierers 15 wird über die Sammeleinheit 3 und die Pumpe 24 dem zweiten Sortierer 9 zugeführt, welcher ebenfalls die Grobfraktion des ersten Sortierers über die Sammeleinheit 3 erhält.Also applies to this
Über die online-Durchflussmessungen wird eine vollständige Bilanzierung der Massenströme in allen Sortierern ermöglicht. Die Zielgrößen Produktion und Faserverlust sind damit erfasst.Online flow measurements enable complete balancing of mass flows in all sorters. The target quantities production and fiber loss are thus included.
Die Zielgröße Wirkungsgrad oder Gutstoffqualität kann ebenfalls über einen online-Qualitätssensor 5 erfasst werden, dessen Ausgangssignale dem Zustandsregler 25 zur weiteren Verarbeitung zugeführt werden. Dies ist aber nicht zwingend erforderlich. Eine sinnvolle Regelung bzw. Steuerung ist auch dadurch möglich, dass der Bediener qualitativ vorgibt, ob er eine höhere Qualität oder eine höhere Produktion fahren möchte.The target variable efficiency or acceptable quality can also be detected via an
Eine Weiterbildung der Erfindung zeichnet sich dadurch aus, dass zumindest für den ersten Sortierer 1 ein Rücklauf RC vorgesehen ist. Dieser Rücklauf wird von der Feinfraktion F vor dem Durchfluss-Sensor 7 abgezweigt und zur Eingangsleitung für die Suspension S geführt, wobei die Rückführung zweckmäßigerweise vor der Förderpumpe 24 mündet. In dem Rücklauf RC sind wiederum ein Durchfluss-Sensor 22 und ein Stellventil 23 angeordnet, wobei der Sensor 22 seine Signale an den Zustandsregler 25 liefert und das Stellventil 23 vom Zustandsregler 25 gesteuert oder geregelt wird. Die Rücklaufströmung der Feinfraktion kann dabei als zusätzlicher Betriebsparameter in das Regelungskonzept eingebunden werden. Der dabei erreichbare Vorteil liegt darin, dass dieser zusätzliche Betriebsparameter einen signifikanten Einfluss auf den Sortierwirkungsgrad hat, aber nur geringen Einfluss auf die übrigen Betriebsparameter.A development of the invention is characterized in that at least for the first sorter 1 a return flow RC is provided. This return is branched off from the fine fraction F before the flow sensor 7 and fed to the inlet line for the suspension S, the return expediently before the feed pump 24 opens. In turn, a
Fig. 3 zeigt eine besonders bevorzugte Ausführungsvariante der Erfindung, die sich vom Ausführungsbeispiel nach Fig. 2 dadurch unterscheidet, dass der Rücklauf RC nicht am ersten Sortierer, sondern vielmehr am zweiten Sortierer 9 der dargestellten Anlage vorgesehen ist. In dieser Rückführung RC ist analog zur Ausführungsform nach Fig. 2 ein Durchflusssensor 22' und ein Stellventil 23' vorgesehen, wobei der Durchflusssensor 22' seine Ausgangssignale an den Zustandsregler 25 liefert, während das Stellventil 23' seine Steuer- bzw. Regelsignale vom Zustandsregler 25 erhält. Die Verwendung eines Rücklaufs RC in einer höheren Stufe der Gesamtanordnung, wie im Ausführungsbeispiel nach Fig. 3 im Zusammenhang mit der Stufe 9, ist deshalb besonders vorteilhaft, weil in diesen Stufen die Schmutzfracht bereits größer ist und damit die Rückführung die bestmögliche Wirksamkeit entfalten kann.Fig. 3 shows a particularly preferred embodiment of the invention, which differs from the embodiment of FIG. 2 in that the return RC is not provided on the first sorter, but rather on the
Darauf hinzuweisen ist, dass im Zusammenhang mit den Ausführungsbeispielen nach den Fig. 2 und 3 generell ausgangs- bzw. eingangsseitige Messungen vorgesehen sind, was aber nicht bedeutet, dass sämtliche Massenströme stets über Messungen erfasst werden müssen. Es ist ebenso möglich, dass nur ein Teil der Massenströme online über Messwerte erfasst wird und die verbleibenden Massenströme rechnerisch ermittelt werden. Es genügt beispielsweise bei einem Sortierer, der über drei Anschlüsse ver- oder entsorgt wird, zwei Massenströme zu erfassen, weil sich dann ein dritter Massenstrom aufgrund des Arbeitens mit einem inkompressiblen Medium berechnen lässt.It should be pointed out that in connection with the exemplary embodiments according to FIGS. 2 and 3, generally output-side or input-side measurements are provided, which does not mean, however, that all mass flows must always be recorded via measurements. It is also possible that only part of the mass flows are recorded online via measured values and the remaining mass flows are calculated. For example, in the case of a sorter that is disposed of or disposed of via three ports, it is sufficient to detect two mass flows, because then a third mass flow can be calculated on the basis of working with an incompressible medium.
Es sei ausdrücklich noch darauf hingewiesen, dass das erfindungsgemäße Verfahren im Vergleich zu den Ausführungsbeispielen nach den Fig. 2 und 3 sowohl mit einer größeren als auch mit einer kleineren Anzahl von Sortierern realisiert werden kann.It should be expressly pointed out that the method according to the invention in comparison to the embodiments according to FIGS. 2 and 3 can be realized both with a larger and with a smaller number of sorters.
- 11
- erster Sortiererfirst sorter
- 22
- Siebscree
- 33
- Sammeleinheitcollection unit
- 44
- Stellventil, Grobfraktion erster SortiererControl valve, coarse fraction of first sorters
- 55
- Qualitätssensorquality sensor
- 66
- Durchfluss-Sensor, Grobfraktion erster SortiererFlow sensor, coarse fraction of first sorters
- 77
- Durchfluss-Sensor, Feinfraktion erster SortiererFlow sensor, fine fraction of first sorter
- 88th
- Stellventil, Feinfraktion erster SortiererControl valve, fine fraction of first sorter
- 99
- zweiter Sortierersecond sorter
- 1010
- Siebscree
- 1111
- Durchfluss-Sensor, Grobfraktion zweiter SortiererFlow sensor, coarse fraction second sorter
- 1212
- Stellventil, Grobfraktion, zweiter SortiererControl valve, coarse fraction, second sorter
- 1313
- Durchfluss-Sensor, Feinfraktion zweiter SortiererFlow sensor, fine fraction second sorter
- 1414
- Stellventil, Feinfraktion zweiter SortiererControl valve, fine fraction second sorter
- 1515
- dritter Sortiererthird sorter
- 1616
- Siebscree
- 1717
- Durchfluss-Sensor, Grobfraktion, dritter SortiererFlow sensor, coarse fraction, third sorter
- 1818
- Stellventil, Grobfraktion, dritter SortiererControl valve, coarse fraction, third sorter
- 1919
- Abfallwaste
- 2020
- Durchfluss-Sensor, Feinfraktion dritter SortiererFlow sensor, fine fraction of third sorter
- 2121
- Stellventil, Feinfraktion dritter SortiererControl valve, fine fraction third sorter
- 2222
- Durchfluss-SensorrücklaufFlow sensor Return
- 22'22 '
- Durchfluss-Sensor (Rücklauf RC)Flow sensor (return RC)
- 2323
- StellventilrücklaufControl valve return
- 23'23 '
- Stellventil (Rücklauf RC)Control valve (return RC)
- 2424
- Pumpepump
- 2525
- Zustandsregler (Prozessor)State controller (processor)
Claims (16)
- A method of regulating multi-stage sorting systems in paper production,
wherein the fiber suspension (S) respectively supplied to a sorting stage is separated into at least two fractions, namely a fine fraction (F) and a coarse fraction (G), and at least one portion of a coarse fraction of a first sorting stage is again sorted in a second sorting stage and at least the fine fraction obtained is returned into the sorting process and is supplied at least partly to the discharged fine fraction of the first sorting stage,
characterized in that,
at each sorting stage (1, 9, 15) of the sorting system, the mass flows at the input side and at the output side are determined by online measurement at least in part and the values obtained are supplied to a state regulator (25) associated with the sorting system for the balancing of the mass flows and also for the mathematical modeling and state regulating of the sorting system; and in that the state regulator (25) controls or regulates the mass flows of the sorters (1, 9, 15) at the output side via setting valves (4, 8, 12, 14) while taking account of the mathematical modeling of the sorting system in dependence on pre-settable target parameters of the sorting system such as production, efficiency and fiber loss. - A method in accordance with claim 1, characterized in that the mass flows are determined online via throughflow measurements and/or consistency measurements.
- A method in accordance with claim 1 or claim 2, characterized in that the mathematical modeling of the sorting system is carried out via a system of linear equations which describe the dependence of the target parameters on the operating parameters.
- A method in accordance with claim 3, characterized in that the equation system is solved in the state regulator (25) by means of real time algorithms.
- A method in accordance with any one of the preceding claims, characterized in that the respective target parameters can be qualitatively pre-set individually or in selectable combinations via the state regulator (25).
- A method in accordance with any one of the claims 3 to 5 characterized in that modified machine configurations, in particular wear or screen basket replacement, are taken into account by matching the constants of the equation system.
- A method in accordance with any one of the preceding claims, characterized in that operating limits such as minimum permitted throughput, minimum reject amount and the like can be pre-set via the mathematical modeling of the sorting system.
- A method in accordance with any one of the preceding claims, characterized in that all fine fractions are guided in a forward manner in the sorting system.
- A method in accordance with any one of the claims 1 to 7, characterized in that a pre-settable portion of the fine fraction (F) of at least the first sorter (1) is led back to the input of this sorter (1).
- A method in accordance with claim 9, characterized in that the portion of the fine fraction (F) led back is controlled or regulated via the state regulator (25).
- A method in accordance with any one of the preceding claims, characterized in that a quality sensor (5) detecting the discharged fine fraction (F) of the sorting system delivers an input signal for the state regulator (25).
- A method in accordance with claim 11, characterized in that the signal supplied from the quality sensor (5) to the state regulator (25) influences at least the amount of the fine fraction led back at the first sorter (1).
- A sorting system for paper production for carrying out the method in accordance with one or more of the preceding claims comprising a first sorter (1) and at least one second sorter (9), wherein the fiber suspension (S) respectively supplied to a sorter (1, 9) is separated into at least two fractions, namely a fine fraction (F) and a coarse fraction (G), and the fine fraction of the second sorter (9) is supplied at least partly to the discharged fine fraction of the first sorter,
characterized in that
throughflow sensors (4, 7; 11, 13) and setting valves (4, 8; 12, 14) are provided at the outputs for the fine fraction (F) and the coarse fraction (G) of the sorters (1, 9); and in that a state regulator (25) is provided which receives the output signals of all throughflow sensors to balance the mass flows and controls or regulates the setting valves in dependence on pre-settable target parameters of the sorting while taking account of a mathematical modeling of the sorting system. - A sorting system in accordance with claim 13, characterized in that a third sorter (15) is connected after the output for the coarse fraction of the second sorter (9), with respective throughflow sensors (16, 17) and setting valves (21, 18) being associated with its outputs for the fine fraction and the coarse fraction and delivering their measured signals to the state regulator (25) and receiving their control signals from the state regulator (25); in that the coarse fraction of the third sorter is supplied to a store (19) after dewatering; and in that the fine fraction is supplied, together with the coarse fraction of the first sorter, to the input of the second sorter (9).
- A sorting system in accordance with claim 13 or claim 14, characterized in that a quality sensor (5), whose output signals are supplied to the state regulator (25), is arranged in the line for the discharged fine fraction of the sorting system.
- A sorting system in accordance with any one of claims 13 to 15, characterized in that a return circuit (RC) for the fine fraction is associated with at least the first sorter; in that a throughflow sensor (22) and a setting or regulating valve (23) are arranged in the corresponding return circuit line, with the measured signals of the throughflow sensor (22) being supplied to the state regulator (25) and the setting valve (23) being actuated via the state regulator (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07000198A EP1767690A3 (en) | 2001-12-10 | 2002-11-04 | Method for controlling sorting systems and sorting system for using the method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10160603A DE10160603A1 (en) | 2001-12-10 | 2001-12-10 | Method for regulating sorting systems and sorting system suitable for carrying out this method |
| DE10160603 | 2001-12-10 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07000198A Division EP1767690A3 (en) | 2001-12-10 | 2002-11-04 | Method for controlling sorting systems and sorting system for using the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1318229A1 EP1318229A1 (en) | 2003-06-11 |
| EP1318229B1 true EP1318229B1 (en) | 2007-04-04 |
Family
ID=7708666
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07000198A Withdrawn EP1767690A3 (en) | 2001-12-10 | 2002-11-04 | Method for controlling sorting systems and sorting system for using the method |
| EP02024605A Expired - Lifetime EP1318229B1 (en) | 2001-12-10 | 2002-11-04 | Method for controlling sorting systems and sorting system for using the method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07000198A Withdrawn EP1767690A3 (en) | 2001-12-10 | 2002-11-04 | Method for controlling sorting systems and sorting system for using the method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7083049B2 (en) |
| EP (2) | EP1767690A3 (en) |
| JP (1) | JP2003239186A (en) |
| AT (1) | ATE358742T1 (en) |
| CA (1) | CA2413486A1 (en) |
| DE (2) | DE10160603A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021097280A1 (en) * | 2019-11-14 | 2021-05-20 | Buckman Laboratories International, Inc. | Predictive control system and method for brown washing treatment in pulp mills |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10350073A1 (en) * | 2003-10-27 | 2005-06-09 | Siemens Ag | White control method for ink removal in deinking plants and a deinking plant with a flotation cell for ink removal |
| AT501723B1 (en) * | 2005-06-16 | 2006-11-15 | Andritz Ag Maschf | METHOD FOR REMOVING CONTAMINATION FROM FIBROUS SUSPENSIONS |
| DE102008013034B3 (en) * | 2008-03-07 | 2009-09-17 | Technische Universität Darmstadt | Method for adjusting and / or optimizing a sorting plant and sorting plant separating a good from a bad substance |
| US10041209B1 (en) | 2015-08-21 | 2018-08-07 | Pulmac Systems International, Inc. | System for engineering fibers to improve paper production |
| US10941520B2 (en) | 2015-08-21 | 2021-03-09 | Pulmac Systems International, Inc. | Fractionating and refining system for engineering fibers to improve paper production |
| US11214925B2 (en) | 2015-08-21 | 2022-01-04 | Pulmac Systems International, Inc. | Method of preparing recycled cellulosic fibers to improve paper production |
| WO2018043030A1 (en) * | 2016-08-31 | 2018-03-08 | セイコーエプソン株式会社 | Sheet manufacturing device, and control method of sheet manufacturing device |
| JP7211022B2 (en) * | 2018-11-07 | 2023-01-24 | セイコーエプソン株式会社 | Web manufacturing equipment and sheet manufacturing equipment |
| DE102019125317A1 (en) * | 2019-09-20 | 2021-03-25 | Voith Patent Gmbh | Cleaning process |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3110172A (en) * | 1961-03-06 | 1963-11-12 | Process & Steam Specialties In | Consistancy and freeness measuring and regulating apparatus for thin stock pulp and paper |
| US3873416A (en) * | 1970-11-27 | 1975-03-25 | Alkibiadis Karnis | System for the continuous measurement of the weight-average fiber length of a pulp |
| US3886035A (en) * | 1973-03-12 | 1975-05-27 | Kamyr Inc | Process for separating knots from pulp |
| US4342618A (en) * | 1979-05-14 | 1982-08-03 | Alkibiadis Karnis | Method and apparatus on-line monitoring of fibre length of mechanical pumps |
| SE8106985L (en) * | 1981-11-24 | 1983-05-25 | Nils Anders Lennart Wikdahl | KEEP PREVENTING THE COMPOSITION OF A SILORGAN IN THE SILVERING OF A FIBER SUSPENSION |
| DE3241876A1 (en) * | 1982-11-12 | 1984-05-17 | J.M. Voith Gmbh, 7920 Heidenheim | DEVICE FOR FACTIONING FIBER SUSPENSION |
| SE470315B (en) * | 1992-06-05 | 1994-01-17 | Sunds Defibrator Ind Ab | Methods to control the screening process when screening cellulose-containing pulp suspensions |
| CA2247101A1 (en) * | 1996-02-29 | 1997-09-04 | Alfa Laval Ab | Process and apparatus for controlling the purification and yield of fibers from a fiber suspension |
| US6080274A (en) * | 1997-05-06 | 2000-06-27 | Valmet Corporation | Method for controlling a multi-phase screening apparatus |
| DE19802493C1 (en) * | 1998-01-23 | 1999-10-14 | Voith Sulzer Papiertech Patent | Process for removing impurities from a waste paper pulp suspension |
| DE19806734A1 (en) | 1998-01-23 | 1998-09-17 | Voith Sulzer Papiertech Patent | Flotation cleaning of fibre suspensions especially for processing used paper materials, for recycling |
| DE19819110A1 (en) * | 1998-04-29 | 1999-11-04 | Voith Sulzer Papiertech Patent | Improving overall efficiency of fibrous suspension wet sieving |
| DE19910910A1 (en) | 1999-03-11 | 2000-09-28 | Voith Sulzer Papiertech Patent | Process for carrying out an optimized fiber or paper production process |
| FI107741B (en) * | 2000-02-11 | 2001-09-28 | Metso Paper Inc | A method for controlling the quality of a pulp |
| FI112806B (en) * | 2001-03-09 | 2004-01-15 | Metso Paper Inc | A method for controlling the quality of a pulp |
-
2001
- 2001-12-10 DE DE10160603A patent/DE10160603A1/en not_active Ceased
-
2002
- 2002-11-04 DE DE50209858T patent/DE50209858D1/en not_active Expired - Lifetime
- 2002-11-04 AT AT02024605T patent/ATE358742T1/en active
- 2002-11-04 EP EP07000198A patent/EP1767690A3/en not_active Withdrawn
- 2002-11-04 EP EP02024605A patent/EP1318229B1/en not_active Expired - Lifetime
- 2002-12-03 US US10/308,439 patent/US7083049B2/en not_active Expired - Fee Related
- 2002-12-04 CA CA002413486A patent/CA2413486A1/en not_active Abandoned
- 2002-12-06 JP JP2002355013A patent/JP2003239186A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021097280A1 (en) * | 2019-11-14 | 2021-05-20 | Buckman Laboratories International, Inc. | Predictive control system and method for brown washing treatment in pulp mills |
| US12077911B2 (en) | 2019-11-14 | 2024-09-03 | Buckman Laboratories International, Inc. | Predictive control system and method for brown washing treatment in pulp mills |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030116661A1 (en) | 2003-06-26 |
| US7083049B2 (en) | 2006-08-01 |
| EP1318229A1 (en) | 2003-06-11 |
| DE50209858D1 (en) | 2007-05-16 |
| CA2413486A1 (en) | 2003-06-10 |
| ATE358742T1 (en) | 2007-04-15 |
| JP2003239186A (en) | 2003-08-27 |
| EP1767690A2 (en) | 2007-03-28 |
| DE10160603A1 (en) | 2003-06-26 |
| EP1767690A3 (en) | 2007-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69022381T2 (en) | METHOD FOR OPERATING A NUMBER OF FLOTATION SEPARATING CELLS. | |
| EP1318229B1 (en) | Method for controlling sorting systems and sorting system for using the method | |
| DE19751591B4 (en) | Method and device for determining the mass density of a volume flow of a suspension in a processing plant for ores or minerals | |
| DE2842259C2 (en) | Process and sorting system for dry sorting of a granular mixture of solid components | |
| CH649112A5 (en) | METHOD FOR FRACTIONING FIBER FIBER RECOVERED FROM WASTE PAPER, AND PLANT FOR CARRYING OUT THE METHOD. | |
| DE3424919C2 (en) | ||
| EP2358479B1 (en) | Hydrocyclone arrangement | |
| DE69611732T3 (en) | screening device | |
| EP1457597A2 (en) | Method for regulating the operation of a flotation cell | |
| DE102005016192A1 (en) | Process for dissolving and cleaning contaminant-containing paper tubes | |
| DD204964A5 (en) | METHOD FOR PREVENTING THE CONTAMINATION OF A SIEVE DEVICE | |
| DD209491A5 (en) | METHOD AND DEVICE FOR SEVENING A FIBER SUSPENSION | |
| EP1262594B1 (en) | Process for separating specified materials from an aqueous fibrous material suspension | |
| EP0658648B1 (en) | Process and apparatus for continuously separating desirable and undesirable substances in a fibrous suspension | |
| EP1876289B1 (en) | Method for separating impurities from a fibrous suspension | |
| WO2013110386A1 (en) | Method for controlling a flotation process for de-inking used paper | |
| DE10160533A1 (en) | Wet sieve assembly, to sort fiber suspension by fiber length fractions/separate impurities, has backflow branch from fine fraction flow path back to sieve unit as control to increase number of adjustable parameters | |
| DE69514836T2 (en) | SCREEN DEVICE | |
| DE3434241C2 (en) | Method and device for cleaning and thickening a fiber suspension | |
| DE102008013034B3 (en) | Method for adjusting and / or optimizing a sorting plant and sorting plant separating a good from a bad substance | |
| DE10125978C1 (en) | Flotation of a used paper fiber suspension, to separate impurities, takes part-flows from at least one flotation stage to be returned for flotation, to maintain a constant clean fiber suspension quality | |
| DE102013112949A1 (en) | Apparatus and method for gluing fibers or fiber-like material | |
| EP1734175B1 (en) | Process for removing impurities from fibrous suspensions | |
| DE10158858B4 (en) | Method and device for dividing a pulp suspension | |
| DE19847229A1 (en) | Mineral separation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
| AKX | Designation fees paid | ||
| 17P | Request for examination filed |
Effective date: 20031007 |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AT DE FI FR SE |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH PATENT GMBH |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE FI FR SE |
|
| REF | Corresponds to: |
Ref document number: 50209858 Country of ref document: DE Date of ref document: 20070516 Kind code of ref document: P |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20080107 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FI Payment date: 20121113 Year of fee payment: 11 Ref country code: DE Payment date: 20121121 Year of fee payment: 11 Ref country code: FR Payment date: 20121130 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20121120 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20121113 Year of fee payment: 11 |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 358742 Country of ref document: AT Kind code of ref document: T Effective date: 20131104 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20140731 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131105 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140603 Ref country code: FI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131104 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131104 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50209858 Country of ref document: DE Effective date: 20140603 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131202 |