EP1447473B2 - Method for producing a standardized state analysis of parameters and/or operating conditions influencing the quality of a fibrous web during manufacture thereof and machine for carrying out the method - Google Patents

Method for producing a standardized state analysis of parameters and/or operating conditions influencing the quality of a fibrous web during manufacture thereof and machine for carrying out the method Download PDF

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Publication number
EP1447473B2
EP1447473B2 EP04100401.1A EP04100401A EP1447473B2 EP 1447473 B2 EP1447473 B2 EP 1447473B2 EP 04100401 A EP04100401 A EP 04100401A EP 1447473 B2 EP1447473 B2 EP 1447473B2
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Prior art keywords
parameters
fibrous web
machine
operating conditions
registered
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German (de)
French (fr)
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EP1447473A2 (en
EP1447473A3 (en
EP1447473B1 (en
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Bernd Stibi
Stefan Natterer
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Voith Patent GmbH
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Voith Patent GmbH
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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 producing a standardized state analysis of parameters and / or states of operation influencing the quality of the fibrous web to be produced in the production of a fibrous web according to the preamble of claim 1. Such a method is known from the US-A-6024835 known.
  • the invention further relates to a machine for producing a fibrous web.
  • this comprehensive analysis method should serve to assess the quality of the fibrous web, in particular stability of the basis weight in machine direction (MD) and cross machine direction (CD), condition analyzes in the constant part and wet part, for example, headbox or wire section to perform and possible disturbances in the constant part and on the machine to capture and evaluate, which are causally responsible for variations in particular the basis weight longitudinal and transverse profile of the fibrous web formed.
  • MD machine direction
  • CD cross machine direction
  • this object is solved by the features of claim 1.
  • parameters and / or operating states for a specific machine in a specific production state are recorded and processed.
  • a database which preferably contains previously acquired and processed parameters and / or operating states, and the correlation with the parameters of the fibrous web to be produced
  • By comparing the current data with historical data from the database causes for disruptions in the quality of the fibrous web can be identified more quickly and thus eliminated faster and more cost-effectively.
  • WEP Wet End Process
  • the parameters and / or operating states of at least one pulp suspension used for producing the fibrous web and its at least one additive and the machine for producing the fibrous web and the constant part are detected. This ensures that all possible influencing factors on the quality of the fibrous web are actually recorded.
  • the parameters of the fibrous web to be produced are preferably recorded along the production process.
  • the parameters and / or the operating states are mostly, preferably holistically, recorded at the same time over specified periods of time online.
  • the creation of a so-called operational snapshot of the constant part and the machine is made possible, whereby a clear evaluation of the influencing variables on the quality of the fibrous web and a possible allocation of causes and / or problem areas is made possible.
  • the parameters and / or the operating states can be detected by means of standardized data sheets.
  • limit values are determined and defined in a frequency-domain-specific manner, based on at least one determined parameter of the fibrous web to be produced.
  • the detected parameters and / or the operating states of the pulp suspension and / or its at least one additive may according to the invention be, in particular, the substance composition, the freeness, the pH, the temperature and the like by means of material property investigations.
  • the detected parameters and / or the operating states of the pulp suspension and / or of the at least one additive according to the invention may be the charges, the zeta potential and the like by means of chemical analyzes his.
  • the detected parameters and / or the operating states of the constant component can according to the invention be, in particular, pulsation, substance density fluctuation, gas content, oscillation, pH value, rotational speed, temperature, flow rate measurements and the like by means of constant-part measurements.
  • the parameters and / or the operating states of the machine for producing the fibrous web can be detected according to the invention by means of vibration measurements, preferably in the area of the headbox or wire section, by means of vacuum measurements or by speed measurements of the beam or of fabrics, in particular of sieves and felts.
  • the parameters and / or the operating states of the machine for producing the fibrous web in particular machine settings, machine and device types, machine configurations, are preferably recorded, in particular as a function of defined acquisition positions and under specified production settings.
  • the parameters and / or the operating states of the machine for producing the fibrous web and / or the constant part are advantageously recorded by means of at least one, preferably several substance and water cycle balances, wherein the data necessary for the material and water cycle balancing, in particular material densities, Flow rates, retention, retention agent amount / type, defoamer amount / type, deaerator amount / type, conductivity values, cationic demand values, zeta potential values, regrind values, and adjuvant addition levels, particularly depending on specified sensing positions and under specified production settings.
  • the parameters of the fibrous web to be produced are preferably detected by means of quality investigations, such as, for example, online transmission measurements of the fibrous web and offline sample measurements of the fibrous web, in particular according to the measuring methods of Tapio and / or Boyle. Such measurements have already been distinguished in the past by good accuracies and reproducibility.
  • the parameters and / or the operating states are advantageously represented as functions of the frequency and the detected values of the parameters and / or the operating states are frequency-dependent, the detected values of the parameters and / or the operating states preferably having predetermined low, high or bandpass frequencies be filtered.
  • any deviations can be assigned to causers.
  • the inventive machine for producing a fibrous web is characterized by the use of the method according to the invention.
  • the single FIGURE shows a schematic side view of a machine for producing a fibrous web and the associated constant part.
  • a machine 1 for producing a fibrous web 5 comprises a wire section 10, which is fed via a headbox 11 at least one pulp suspension 12.
  • the fibrous web 5 is in particular a paper or board web.
  • the wire section 10 has a bottom wire 13 and a top wire 14 and, in the course of the production process, the fiber web 5 is followed by a press section 15 and a dryer section 16 with a plurality of drying cylinders 17 and deflection cylinders 18.
  • the drying section 16 follows in the running direction L (arrow) of the fibrous web 5, a coating unit 19 with downstream drying device 20, a calender 21 and a winding machine 22 for winding the finished fibrous web 5 on a winding roll 23rd
  • the basic structure of such a machine 1 for producing a fibrous web 5, as shown in the figure only by way of example, is well known from a variety of documents.
  • the machine 1 is a constant part 24 for the preparation of at least one pulp suspension 12 upstream.
  • the constant part 24 is generally used to supply the machine 1 at least one pulp suspension 12 with a constant time amount, constant pressure, constant consistency and constant composition.
  • the pulp density desired for the operation of the machine 1 is achieved by the admixture of the LC liquid to the HC liquid.
  • the parameters and / or the operating states of at least one fibrous suspension 12 used for producing the fibrous web 5 and its at least one additive and the machine 1 for producing the fibrous web 5 and the constant part 24 are detected online, preferably in entirety, at the same time over fixed periods of time.
  • the parameters and / or the operating states are preferably detected by means of standardized data sheets.
  • the parameters of the fibrous web 5 to be produced are preferably detected along the production process.
  • limit values are determined and defined in a frequency-domain-specific manner, based on at least one determined parameter of the fibrous web 5 to be produced.
  • the parameters and / or the operating states of the pulp suspension 12 and / or its at least one additive are determined by means of material property analyzes or by chemical analyzes, the constant part 24 by means of constant part measurements and the machine 1 for producing the fibrous web 5 by means of vibration measurements, by vacuum measurements or by velocity measurements of Beam or covered by clothing. Moreover, the general parameters and / or the operating conditions of the machine 1 for producing the fibrous web 5 will be detected, in particular as a function of defined detection positions and under specified production settings.
  • the parameters and / or the operating states of the machine 1 for producing the fibrous web 5 and / or the constant part 24 are detected by means of at least one, preferably several material and water cycle balances, wherein the necessary data mentioned above are detected, in particular in dependence on specified Entry items and under specified production settings.
  • the parameters of the fibrous web 5 to be produced are detected by means of quality investigations, such as, for example, online transmission measurements of the fibrous web 5 and offline sample measurements of the fibrous web 5, in particular according to the measuring methods of Tapio and / or Boyle.
  • All of the mentioned parameters and / or the operating states are represented as functions of the frequency and the detected values of the parameters and / or the operating states are evaluated frequency-domain-dependent after filtering with specified low, high or bandpass frequencies.
  • the detected values of the parameters and / or the operating states are compared with predefinable setpoint values and any deviations attributed to causers.
  • the machine 1 and the constant part 24 have a data acquisition and analysis system 30 which is in particular multi-channel and / or in particular supported by at least one computer 31. Furthermore, they have devices 32 (arrow representations) known to the person skilled in the art for measuring oscillations, in particular vibration sensors or accelerometers with preferably electronic integrators, and / or rotational speed measuring devices, in particular with reflex probes, and / or pressure sensors, in particular for measuring absolute pressures or pressure fluctuations, and / or after the Boadway method working gas content measuring devices for free and / or dissolved components and / or devices for on-line analysis of the fibrous web 5, in particular transmission sensors, and / or continuously measuring material density on.
  • devices 32 (arrow representations) known to the person skilled in the art for measuring oscillations, in particular vibration sensors or accelerometers with preferably electronic integrators, and / or rotational speed measuring devices, in particular with reflex probes, and / or pressure sensors, in particular for measuring absolute pressures or pressure fluctuations, and / or after the Boadway
  • FFT Fast Fourier Transformation
  • a low-pass adjustment is made at a frequency f c of, for example, 1000 Hz.
  • the Fourier spectra are shown, for example, up to 150 Hz. From these spectra can be periodic exciters of disturbances, for example, pumps, such as dilution water pumps, and sorters for separating fibers or other components from the Pulp suspension 12, which exceed a certain permissible size of particles in the region of the constant part identify. For pressure fluctuations caused by these applies a low-pass cutoff frequency of, for example, 10 Hz.
  • a low-pass cutoff frequency for example, 2.5 Hz and for exclusively long-wave pressure fluctuations caused, for example, by control fluctuations, a low-pass cutoff frequency of 0.1 Hz, for example the mean time, span, standard deviation, and coefficient of variation, that is, the ratio of the standard deviation to the mean in percent.
  • Substance density fluctuations are determined over a period of a few minutes, for example.
  • the measuring instrument is calibrated by a series of measurements with the addition of defined amounts of dilution water.
  • the gas content of the pulp suspension 12 has a direct influence on the formation of the fibrous web 5, on the dewatering performance in the wire section 10 and the propagation speed of pressure fluctuations (sound velocity in the medium) and on surface weight fluctuations by pressure pulsations.
  • the respective proportions in the pulp suspension 12 vary with the composition of matter and the system pressure. Therefore, measures are also taken to limit the gas content in the pulp suspension 12 at the outlet of the venting container 28 to a still permissible value.
  • vibration measurements are preferably carried out.
  • the vibrations are measured both on the driver's and on the drive side of the machine 1 in each of the three spatial directions and evaluated in accordance with the ISO Directive 10816-1 Class III (Annex A01). According to this guideline, mechanical vibrations are judged with regard to their permissibility by means of the effective value of the vibration speed.
  • the oscillation (oscillation amplitude) is additionally used as a criterion.
  • the on-line transmission measurements of the fibrous web 5 are preferably carried out in the region of the dryer section 16 and the offline sample measurements of the fibrous web 5, in particular according to the measuring methods of Tapio and / or Boyle, in the area of the winding machine 22.
  • the sensor for online transmission measurement illuminates the fibrous web 5 and provides a light-dark signal as an analogue signal. From the frequency analysis of this signal can be read off any periodic fluctuations. Due to the fluttering of the fibrous web 5, the spectrum below a certain frequency, for example, 3 Hz, can be recycled only conditionally.
  • the output signal is normalized to the basis weight according to a calibration specification. When evaluating these measurement results, optical interference effects in the paper, such as luster variations, must be taken into account, which can lead to falsifications.
  • the disorders are analyzed as to whether they occur periodically or whether they are stochastic (random); Disturbances are decomposed by means of a fast Fourier transformation method into their periodic and their random components.
  • the relevant interference potentials are then assigned to the measurements carried out simultaneously in the wet part, that is to say in the region in which a fibrous web 5 which has not yet dried or previously the fibrous stock suspension 12 is present. From the evaluation of the measurement results recommendations for the elimination of stochastic disturbances are given, for example to improve the substance mixing, to change the piping, etc.

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Description

Die Erfindung betrifft ein Verfahren zum Erstellen einer standardisierten Zustandsanalyse von bei der Herstellung einer Faserstoffbahn die Qualität der herzustellenden Faserstoffbahn beeinflussenden Parametern und/oder Betriebszuständen gemäß dem Oberbegriff des Anspruchs 1. Ein derartiges Verfahren ist aus der US-A-6024835 bekannt.
Die Erfindung betrifft weiterhin eine Maschine zur Herstellung einer Faserstoffbahn.The invention relates to a method for producing a standardized state analysis of parameters and / or states of operation influencing the quality of the fibrous web to be produced in the production of a fibrous web according to the preamble of claim 1. Such a method is known from the US-A-6024835 known.
The invention further relates to a machine for producing a fibrous web.

Es ist bekannt, im Konstantteil und in den Maschinenaggregaten einer Maschine, insbesondere einer Papier- oder Kartonmaschine, zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn, Untersuchungen und Messungen unabhängig voneinander und zeitlich versetzt durchzuführen und die relevanten Parameter und/oder Betriebszustände erfassen. Dabei werden beispielsweise Auslegungs-Bilanzierungen, Druck-, Stoffdichte-, Gasgehalts-, Schwingungs-, Transmissions-, Flächengewichts-, Stoffdichte-, pH-Wert-, Retentions-, Retentionsmittel/Typ, Entschäumermenge/Typ, Leitfähigkeits-, kationische Bedarfs-, Zetapotenzial- und Mahlgradmessungen durchgeführt. Aufgrund der unabhängig voneinander und zeitlich versetzt durchgeführten Untersuchungen und Messungen gab es bisher kein durchgängig standardisiertes Untersuchungsprinzip (Auswertemethode), das eine vergleichbare Erfassung und Aufbereitung aller erfassten Parameter und/oder Betriebszustände ermöglicht. Aus diesem Grund gab es bisher keine einheitliche Datenbasis und somit auch keine zuverlässige und fundierte Beurteilung der erfassten und aufbereiteten Parameter und/oder Betriebsstände. In der Vergangenheit wurden vielmehr viele Einzelmessungen durchgeführt; ein direkter Vergleich mit vorherigen Erfassungen beziehungsweise Erfassungen an anderen Maschinen war nicht möglich.It is known, in the constant part and in the machine aggregates of a machine, in particular a paper or board machine, for producing a fibrous web, in particular a paper or board web, to perform examinations and measurements independently of each other and offset in time and to record the relevant parameters and / or operating states , For example, design balances, pressure, mass density, gas content, vibration, transmission, basis weight, consistency, pH, retention, retention / type, defoamer / type, conductivity, cationic requirements , Zeta potential and freeness measurements carried out. Due to the independent and temporally staggered examinations and measurements, there was until now no uniformly standardized investigation principle (evaluation method), which enables comparable recording and processing of all recorded parameters and / or operating states. For this reason, so far there has been no uniform database and thus no reliable and sound assessment of the recorded and processed parameters and / or operating statuses. In the past, many individual measurements were carried out; a direct comparison with previous surveys or observations on other machines was not possible.

Es ist Aufgabe der Erfindung, eine umfassende Analyse-Methodik samt entsprechender Maschine darzustellen, mittels derer Einflüsse auf die Qualität der gebildeten Faserstoffbahn aufgedeckt und bewertet werden können. Insbesondere soll diese umfassende Analyse-Methodik dazu dienen, die Qualität der Faserstoffbahn zu beurteilen, insbesondere Stabilität des Flächengewichtes in Maschinelaufrichtung (MD) und in Maschinenquerrichtung (CD), Zustandsanalysen im Konstantteil und Nassteil, beispielsweise Stoffauflauf oder Siebpartie, durchzuführen und mögliche Störungen im Konstantteil und an der Maschine zu erfassen und zu bewerten, die ursächlich für Schwankungen insbesondere des Flächengewichtslängs- und -querprofils der gebildeten Faserstoffbahn verantwortlich sind.It is an object of the invention to present a comprehensive analysis methodology including a corresponding machine by means of which influences on the quality of the fibrous web formed can be detected and evaluated. In particular, this comprehensive analysis method should serve to assess the quality of the fibrous web, in particular stability of the basis weight in machine direction (MD) and cross machine direction (CD), condition analyzes in the constant part and wet part, for example, headbox or wire section to perform and possible disturbances in the constant part and on the machine to capture and evaluate, which are causally responsible for variations in particular the basis weight longitudinal and transverse profile of the fibrous web formed.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst.
Durch die erfindungsgemäße Analyse-Methodik werden Parameter und/oder Betriebszustände für eine bestimmte Maschine bei einem bestimmten Produktionszustand erfasst und aufbereitet. Durch die Hinterlegung der aufbereiteten Parameter und/oder Betriebszustände in einer Datenbank, die vorzugsweise früher erfasste und aufbereitete Parameter und/oder Betriebszustände enthält, und die Korrelation mit den Parametern der herzustellenden Faserstoffbahn wird es ermöglicht, eine umfassende Bewertung über den Zustand der jeweiligen Maschine, den Stand der Qualität der Faserstoffbahn sowie über vorzugsweise alle möglichen Einflussgrößen abzugeben. Durch den Vergleich der aktuellen Daten mit historischen Daten aus der Datenbank können Ursachen für Störungen der Qualität der Faserstoffbahn schneller identifiziert und damit auch schneller und kostengünstiger beseitigt werden.
Es wird also eine umfassende WEP-(Wet End Process-) Analyse-Methodik vorgeschlagen, mittels derer standardisierte Erfassungsabläufe an standardisierten Erfassungspositionen an der Maschine durchführbar sind.According to the invention, this object is solved by the features of claim 1.
By means of the analysis method according to the invention, parameters and / or operating states for a specific machine in a specific production state are recorded and processed. By storing the processed parameters and / or operating states in a database, which preferably contains previously acquired and processed parameters and / or operating states, and the correlation with the parameters of the fibrous web to be produced, it is possible to obtain a comprehensive assessment of the state of the respective machine, to give the status of the quality of the fibrous web and preferably all possible influencing variables. By comparing the current data with historical data from the database, causes for disruptions in the quality of the fibrous web can be identified more quickly and thus eliminated faster and more cost-effectively.
Thus, a comprehensive WEP (Wet End Process) analysis methodology is proposed by means of which standardized acquisition processes at standardized acquisition positions on the machine can be carried out.

Im Rahmen der Durchführung des erfindungsgemäßen Verfahrens werden die Parameter und/oder die Betriebszustände mindestens einer zur Herstellung der Faserstoffbahn verwendeten Faserstoffsuspension und deren mindestens einen Additivs und der Maschine zur Herstellung der Faserstoffbahn und des Konstantteils erfasst. Damit wird sichergestellt, dass auch wirklich alle möglichen Einflussgrößen auf die Qualität der Faserstoffbahn erfasst werden. Die Parameter der herzustellenden Faserstoffbahn werden vorzugsweise entlang des Herstellungsprozesses erfasst.In the context of carrying out the method according to the invention, the parameters and / or operating states of at least one pulp suspension used for producing the fibrous web and its at least one additive and the machine for producing the fibrous web and the constant part are detected. This ensures that all possible influencing factors on the quality of the fibrous web are actually recorded. The parameters of the fibrous web to be produced are preferably recorded along the production process.

Die Parameter und/oder die Betriebszustände werden mehrheitlich, vorzugsweise gesamtheitlich, zeitgleich über festgelegte Zeiträume, online erfasst. Damit wird die Erstellung einer sogenannten betrieblichen Momentaufnahme des Konstantteils und der Maschine ermöglicht, wodurch eine eindeutige Auswertung der Einflussgrößen auf die Qualität der Faserstoffbahn und eine mögliche Zuordnung von Fehlerursachen und/oder Problembereichen ermöglicht wird.The parameters and / or the operating states are mostly, preferably holistically, recorded at the same time over specified periods of time online. Thus, the creation of a so-called operational snapshot of the constant part and the machine is made possible, whereby a clear evaluation of the influencing variables on the quality of the fibrous web and a possible allocation of causes and / or problem areas is made possible.

Die Parameter und/oder die Betriebszustände können dabei mittels standardisierter Datenblätter erfasst werden.The parameters and / or the operating states can be detected by means of standardized data sheets.

Ferner ist es von Vorteil, wenn für die mittels standardisierter Auswertemethoden aufbereiteten Parameter und/oder Betriebszustände frequenzbereichsspezifisch Grenzwerte ermittelt und festgelegt werden, basierend auf mindestens einem ermittelten Parameter der herzustellenden Faserstoffbahn.Furthermore, it is advantageous if, for the parameters and / or operating states prepared by means of standardized evaluation methods, limit values are determined and defined in a frequency-domain-specific manner, based on at least one determined parameter of the fibrous web to be produced.

Die erfassten Parameter und/oder die Betriebszustände der Faserstoffsuspension und/oder deren mindestens einen Additivs können erfindungsgemäß insbesondere die Stoffzusammensetzung, der Mahlgrad, der pH-Wert, die Temperatur und dergleichen mittels Stoffeigenschaftsuntersuchungen sein. Weiterhin können die erfassten Parameter und/oder die Betriebszustände der Faserstoffsuspension und/oder derer mindestens einen Additivs erfindungsgemäß die Ladungen, das Zeta-Potenzial und dergleichen mittels chemischer Analysen sein.
Und die erfassten Parameter und/oder die Betriebszustände des Konstantteils können erfindungsgemäß insbesondere Pulsations-, Stoffdichteschwankungs-, Gasgehalts-, Schwingungs-, pH-Wert-, Drehzahl-, Temperatur-, Durchflussmengenmessungen und dergleichen mittels Konstantteilmessungen sein.
Überdies können die Parameter und/oder die Betriebszustände der Maschine zur Herstellung der Faserstoffbahn erfindungsgemäß mittels Schwingungsmessungen, vorzugsweise im Bereich des Stoffauflaufs oder der Siebpartie, mittels Vakuummessungen oder mittels Geschwindigkeitsmessungen des Strahls oder von Bespannungen, insbesondere von Sieben und Filzen, erfasst werden. Zudem werden vorzugsweise die Parameter und/oder die Betriebszustände der Maschine zur Herstellung der Faserstoffbahn, insbesondere Maschineneinstellungen, Maschinen- und Gerätetypen, Maschinenkonfigurationen, erfasst, insbesondere in Abhängigkeit von festgelegten Erfassungspositionen und unter festgelegten Produktionseinstellungen.The detected parameters and / or the operating states of the pulp suspension and / or its at least one additive may according to the invention be, in particular, the substance composition, the freeness, the pH, the temperature and the like by means of material property investigations. Furthermore, the detected parameters and / or the operating states of the pulp suspension and / or of the at least one additive according to the invention may be the charges, the zeta potential and the like by means of chemical analyzes his.
And the detected parameters and / or the operating states of the constant component can according to the invention be, in particular, pulsation, substance density fluctuation, gas content, oscillation, pH value, rotational speed, temperature, flow rate measurements and the like by means of constant-part measurements.
Moreover, the parameters and / or the operating states of the machine for producing the fibrous web can be detected according to the invention by means of vibration measurements, preferably in the area of the headbox or wire section, by means of vacuum measurements or by speed measurements of the beam or of fabrics, in particular of sieves and felts. In addition, the parameters and / or the operating states of the machine for producing the fibrous web, in particular machine settings, machine and device types, machine configurations, are preferably recorded, in particular as a function of defined acquisition positions and under specified production settings.

In vorteilhafter Weise werden die Parameter und/oder die Betriebszustände der Maschine zur Herstellung der Faserstoffbahn und/oder des Konstantteils mittels mindestens einer, vorzugsweise mehrerer Stoff- und Wasserkreislauf-Bilanzierungen erfasst, wobei die für die Stoff- und Wasskreislaufbilanzierung notwendigen Daten, insbesondere Stoffdichten, Durchflussmengen, Retention, Retentionsmittelmenge/Typ, Entschäumermenge/Typ, Entlüftermenge/Typ, Leitfähigkeitswerte, kationische Bedarfswerte, Zetapotenzialwerte, Mahlgradwerte und Hilfsstoffzugabemengen, erfasst werden, insbesondere in Abhängigkeit von festgelegten Erfassungspositionen und unter festgelegten Produktionseinstellungen.The parameters and / or the operating states of the machine for producing the fibrous web and / or the constant part are advantageously recorded by means of at least one, preferably several substance and water cycle balances, wherein the data necessary for the material and water cycle balancing, in particular material densities, Flow rates, retention, retention agent amount / type, defoamer amount / type, deaerator amount / type, conductivity values, cationic demand values, zeta potential values, regrind values, and adjuvant addition levels, particularly depending on specified sensing positions and under specified production settings.

In weiterer erfindungsgemäßer Ausgestaltung ist vorgesehen, dass mögliche Automatisierungseinflüsse verschiedener Systeme, insbesondere schwingende Regelkreise, identifiziert und träge und/oder sensible Systeme optimiert werden.In a further embodiment according to the invention, it is provided that possible automation influences of different systems, in particular oscillating control circuits, are identified and inert and / or sensitive systems are optimized.

Die Parameter der herzustellenden Faserstoffbahn werden bevorzugt mittels Qualitätsuntersuchungen, wie beispielsweise Online-Transmissionsmessungen der Faserstoffbahn und Offline-Probenmessungen der Faserstoffbahn, insbesondere nach den Messmethoden von Tapio und/oder Boyle, erfasst. Derartige Messungen haben sich bereits in der Vergangenheit durch gute Genauigkeiten und Reproduzierbarkeiten ausgezeichnet.The parameters of the fibrous web to be produced are preferably detected by means of quality investigations, such as, for example, online transmission measurements of the fibrous web and offline sample measurements of the fibrous web, in particular according to the measuring methods of Tapio and / or Boyle. Such measurements have already been distinguished in the past by good accuracies and reproducibility.

Die Parameter und/oder die Betriebszustände werden vorteilhafterweise als Funktionen der Frequenz dargestellt und die erfassten Werte der Parameter und/oder der Betriebszustände werden frequenzbereichsabhängig beurteilt, wobei die erfassten Werte der Parameter und/oder der Betriebszustände vorzugsweise mit festgelegten Tief-, Hoch- oder Bandpassfrequenzen gefiltert werden.The parameters and / or the operating states are advantageously represented as functions of the frequency and the detected values of the parameters and / or the operating states are frequency-dependent, the detected values of the parameters and / or the operating states preferably having predetermined low, high or bandpass frequencies be filtered.

Durch den erfindungsgemäßen Vergleich der erfassten Werte der Parameter und/oder der Betriebszustände mit vorgebbaren Soll-Werten können etwaige Abweichungen Verursachern zugeordnet werden.By means of the comparison according to the invention of the detected values of the parameters and / or of the operating states with predefinable desired values, any deviations can be assigned to causers.

Die erfindungsgemäße Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Faserstoffbahn, zeichnet sich durch den Einsatz des erfindungsgemäßen Verfahrens aus.The inventive machine for producing a fibrous web, in particular a paper or fibrous web, is characterized by the use of the method according to the invention.

Weitere erfindungswesentliche Ausgestaltungen der Maschinen sind in den jeweiligen UnteransprĂĽchen angegeben.Other inventive embodiments of the machines are specified in the respective subclaims.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den UnteransprĂĽchen und der nachfolgenden Beschreibung bevorzugter AusfĂĽhrungsbeispiele unter Bezugnahme auf die Zeichnung.Further features and advantages of the invention will become apparent from the dependent claims and the following description of preferred embodiments with reference to the drawings.

Es zeigt die einzige Figur eine schematisierte Seitenansicht einer Maschine zur Herstellung einer Faserstoffbahn und dazugehörigem Konstantteil.The single FIGURE shows a schematic side view of a machine for producing a fibrous web and the associated constant part.

Eine Maschine 1 zur Herstellung einer Faserstoffbahn 5 umfasst eine Siebpartie 10, der über einen Stoffauflauf 11 mindestens eine Faserstoffsuspension 12 zugeführt wird. Die Faserstoffbahn 5 ist insbesondere eine Papier- oder Kartonbahn. Die Siebpartie 10 weist gemäß der Ausführung der Figur ein Untersieb 13 und ein Obersieb 14 auf und ihr ist im Verlauf des Herstellungsprozesses der Faserstoffbahn 5 eine Pressenpartie 15 und eine Trockenpartie 16 mit mehreren Trockenzylindern 17 und Umlenkzylindern 18 nachgeordnet. Der Trockenpartie 16 folgt in Laufrichtung L (Pfeil) der Faserstoffbahn 5 ein Streichwerk 19 mit nachgeschalteter Trocknungseinrichtung 20, ein Kalander 21 und eine Wickelmaschine 22 zum Aufwickeln der fertigen Faserstoffbahn 5 auf eine Wickelrolle 23.
Der grundsätzliche Aufbau einer derartigen Maschine 1 zur Herstellung einer Faserstoffbahn 5, wie sich in der Figur lediglich beispielhaft dargestellt ist, ist aus einer Vielzahl von Druckschriften bestens bekannt.A machine 1 for producing a fibrous web 5 comprises a wire section 10, which is fed via a headbox 11 at least one pulp suspension 12. The fibrous web 5 is in particular a paper or board web. According to the embodiment of the figure, the wire section 10 has a bottom wire 13 and a top wire 14 and, in the course of the production process, the fiber web 5 is followed by a press section 15 and a dryer section 16 with a plurality of drying cylinders 17 and deflection cylinders 18. The drying section 16 follows in the running direction L (arrow) of the fibrous web 5, a coating unit 19 with downstream drying device 20, a calender 21 and a winding machine 22 for winding the finished fibrous web 5 on a winding roll 23rd
The basic structure of such a machine 1 for producing a fibrous web 5, as shown in the figure only by way of example, is well known from a variety of documents.

Der Maschine 1 ist ein Konstantteil 24 zur Aufbereitung mindestens einer Faserstoffsuspension 12 vorgeordnet. Der Konstantteil 24 dient generell dazu, der Maschine 1 mindestens eine Faserstoffsuspension 12 mit zeitlich konstanter Menge, konstantem Druck, konstanter Stoffdichte und konstanter Zusammensetzung zuzufĂĽhren.
Der Konstantteil 24 umfasst eine Bütte 25 zur Aufbereitung und Bevorratung der Faserstoffsuspension 12 aus den Rohmaterialien in hoher Konsistenz (HC = high consistency) und Wasser, ein Leitungssystem 26 zur Förderung der Faserstoffsuspension 12 zu einer Reinigungseinheit 27 und zu einem Entlüftungsbehälter 28. Nicht dargestellt ist hier ein ebenfalls vorhandenes System von Leitungen zur Rückführung von Siebwasser aus dem Bereich der Siebpartie 10, das nur zu einem geringen Teil Faserstoff enthält (LC = low consistency). Innerhalb des Konstantteils 24 wird durch die Beimischung der LC-Flüssigkeit zur HC-Flüssigkeit die für den Betrieb der Maschine 1 gewünschte Faserstoffdichte erreicht.The machine 1 is a constant part 24 for the preparation of at least one pulp suspension 12 upstream. The constant part 24 is generally used to supply the machine 1 at least one pulp suspension 12 with a constant time amount, constant pressure, constant consistency and constant composition.
The constant part 24 comprises a chest 25 for the preparation and storage of the pulp suspension 12 from the high consistency raw materials (HC) and water, a conduit system 26 for conveying the pulp suspension 12 to a cleaning unit 27 and a vent tank 28. Not shown here also an existing system of lines for the return of white water from the area of the wire section 10, which contains only a small part of pulp (LC = low consistency). Within the constant portion 24, the pulp density desired for the operation of the machine 1 is achieved by the admixture of the LC liquid to the HC liquid.

Es ist nun vorgesehen, dass die einzelnen Parameter und/oder Betriebszustände in der Maschine 1 und im Konstantteil 24 mittels standardisierter Abläufe erfasst und mittels standardisierter Auswertemethoden aufbereitet werden und dass die aufbereiteten Parameter und/oder Betriebszustände in einer angedeuteten Datenbank 29 hinterlegt und mit den Parametern der herzustellenden Faserstoffbahn 5, insbesondere dem Flächengewicht, korreliert werden. Dadurch wird die Erstellung einer standardisierten Zustandsanalyse von bei der Herstellung einer Faserstoffbahn 5 die Qualität der herzustellenden Faserstoffbahn 5 beeinflussenden Parametern und/oder Betriebszuständen, ermöglicht.It is now provided that the individual parameters and / or operating states in the machine 1 and are detected in the constant part 24 by means of standardized processes and processed by means of standardized evaluation methods and that the processed parameters and / or operating conditions are stored in an indicated database 29 and correlated with the parameters of the produced fibrous web 5, in particular the basis weight. This makes it possible to produce a standardized state analysis of parameters and / or operating states influencing the quality of the fibrous web 5 to be produced in the production of a fibrous web 5.

Dabei werden die Parameter und/oder die Betriebszustände mindestens einer zur Herstellung der Faserstoffbahn 5 verwendeten Faserstoffsuspension 12 und deren mindestens einen Additivs und der Maschine 1 zur Herstellung der Faserstoffbahn 5 und des Konstantteils 24 mehrheitlich, vorzugsweise gesamtheitlich, zeitgleich über festgelegte Zeiträume online erfasst. Die Parameter und/oder die Betriebszustände werden dabei vorzugsweise mittels standardisierter Datenblätter erfasst. Die Parameter der herzustellenden Faserstoffbahn 5 werden dabei vorzugsweise entlang des Herstellungsprozesses erfasst.In this case, the parameters and / or the operating states of at least one fibrous suspension 12 used for producing the fibrous web 5 and its at least one additive and the machine 1 for producing the fibrous web 5 and the constant part 24 are detected online, preferably in entirety, at the same time over fixed periods of time. The parameters and / or the operating states are preferably detected by means of standardized data sheets. The parameters of the fibrous web 5 to be produced are preferably detected along the production process.

Und für die mittels standardisierter Auswertemethoden aufbereiteten Parameter und/oder Betriebszustände werden frequenzbereichsspezifisch Grenzwerte ermittelt und festgelegt, basierend auf mindestens einem ermittelten Parameter der herzustellenden Faserstoffbahn 5.And for the parameters and / or operating states processed by means of standardized evaluation methods, limit values are determined and defined in a frequency-domain-specific manner, based on at least one determined parameter of the fibrous web 5 to be produced.

Die Parameter und/oder die Betriebszustände der Faserstoffsuspension 12 und/oder deren mindestens einen Additivs werden mittels Stoffeigenschaftsuntersuchungen oder mittels chemischer Analysen, die des Konstantteils 24 mittels Konstantteilmessungen und die der Maschine 1 zur Herstellung der Faserstoffbahn 5 mittels Schwingungsmessungen, mittels Vakuummessungen oder mittels Geschwindigkeitsmessungen des Strahls oder von Bespannungen erfasst. Überdies werden die allgemeinen Parameter und/oder die Betriebszustände der Maschine 1 zur Herstellung der Faserstoffbahn 5 erfasst werden, insbesondere in Abhängigkeit von festgelegten Erfassungspositionen und unter festgelegten Produktionseinstellungen.The parameters and / or the operating states of the pulp suspension 12 and / or its at least one additive are determined by means of material property analyzes or by chemical analyzes, the constant part 24 by means of constant part measurements and the machine 1 for producing the fibrous web 5 by means of vibration measurements, by vacuum measurements or by velocity measurements of Beam or covered by clothing. Moreover, the general parameters and / or the operating conditions of the machine 1 for producing the fibrous web 5 will be detected, in particular as a function of defined detection positions and under specified production settings.

Die Parameter und/oder die Betriebszustände der Maschine 1 zur Herstellung der Faserstoffbahn 5 und/oder des Konstantteils 24 werden mittels mindestens einer, vorzugsweise mehrerer Stoff- und Wasserkreislauf-Bilanzierungen erfasst, wobei die bereits erwähnten notwendigen Daten erfasst werden, insbesondere in Abhängigkeit von festgelegten Erfassungspositionen und unter festgelegten Produktionseinstellungen.The parameters and / or the operating states of the machine 1 for producing the fibrous web 5 and / or the constant part 24 are detected by means of at least one, preferably several material and water cycle balances, wherein the necessary data mentioned above are detected, in particular in dependence on specified Entry items and under specified production settings.

Dabei werden mögliche Automatisierungseinflüsse verschiedener Systeme, insbesondere schwingende Regelkreise, identifiziert und träge und/oder sensible Systeme optimiert.Possible automation influences of different systems, in particular oscillating control loops, are identified and sluggish and / or sensitive systems are optimized.

Ferner werden die Parameter der herzustellenden Faserstoffbahn 5 mittels Qualitätsuntersuchungen, wie beispielsweise Online-Transmissionsmessungen der Faserstoffbahn 5 und Offline-Probenmessungen der Faserstoffbahn 5, insbesondere nach den Messmethoden von Tapio und/oder Boyle, erfasst.Furthermore, the parameters of the fibrous web 5 to be produced are detected by means of quality investigations, such as, for example, online transmission measurements of the fibrous web 5 and offline sample measurements of the fibrous web 5, in particular according to the measuring methods of Tapio and / or Boyle.

Alle die genannten Parameter und/oder die Betriebszustände werden als Funktionen der Frequenz dargestellt und die erfassten Werte der Parameter und/oder der Betriebszustände werden frequenzbereichsabhängig nach einer Filterung mit festgelegten Tief-, Hoch- oder Bandpassfrequenzen beurteilt.All of the mentioned parameters and / or the operating states are represented as functions of the frequency and the detected values of the parameters and / or the operating states are evaluated frequency-domain-dependent after filtering with specified low, high or bandpass frequencies.

Überdies werden die erfassten Werte der Parameter und/oder der Betriebszustände mit vorgebbaren Soll-Werten verglichen und etwaige Abweichungen Verursachern zugeordnet.Moreover, the detected values of the parameters and / or the operating states are compared with predefinable setpoint values and any deviations attributed to causers.

Im Rahmen der Durchführbarkeit des erfindungsgemäßen Verfahrens weisen die Maschine 1 und der Konstantteil 24 ein insbesondere mehrkanaliges und/oder insbesondere durch mindestens einen Rechner 31 gestütztes Datenerfassungsund Analysesystem 30 auf. Weiterhin weisen sie dem Fachmann bekannte Geräte 32 (Pfeildarstellungen) zur Messung von Schwingungen, insbesondere Schwingungssensoren oder Beschleunigungsaufnehmer mit vorzugsweise elektronischen Integratoren, und/oder Drehzahlmessgeräte, insbesondere mit Reflexsonden, und/oder Drucksensoren, insbesondere zur Messung von absoluten Drücken oder Druckschwankungen, und/oder nach dem Boadway-Verfahren arbeitende Gasgehaltsmessgeräte für freie und/oder gelöste Anteile und/oder Geräte zur Online-Analyse der Faserstoffbahn 5, insbesondere Transmissions-Sensoren, und/oder kontinuierlich messende Stoffdichtemessgeräte auf.Within the scope of the feasibility of the method according to the invention, the machine 1 and the constant part 24 have a data acquisition and analysis system 30 which is in particular multi-channel and / or in particular supported by at least one computer 31. Furthermore, they have devices 32 (arrow representations) known to the person skilled in the art for measuring oscillations, in particular vibration sensors or accelerometers with preferably electronic integrators, and / or rotational speed measuring devices, in particular with reflex probes, and / or pressure sensors, in particular for measuring absolute pressures or pressure fluctuations, and / or after the Boadway method working gas content measuring devices for free and / or dissolved components and / or devices for on-line analysis of the fibrous web 5, in particular transmission sensors, and / or continuously measuring material density on.

Mittels dieser Messungen lassen sich Auswirkungen von Änderungen von Parametern und/oder Betriebszuständen im Konstantteil 24 auf die Stabilität des Flächengewichts der Faserstoffbahn 5 ermitteln. Mögliche Gründe für ein instabiles Flächengewicht, für Blasen- und Faltenbildung sind im Längsprofil Staudruckschwankungen, hohe Gasgehalte, Stoffdichteschwankungen, Schwingungen am Stoffauflauf 11, Schwingungen in der Siebpartie 10, Vakuum-(Unterdruck-) Schwankungen an Saugeinrichtungen oder im Entlüftungsbehälter 28 und aufgrund von Schwankungen der Geschwindigkeiten der Siebe 12, 14. Im Querprofil ergibt sich ein instabiles und ungleichmäßiges Flächengewicht durch Stoffdichteschwankungen, hohe Gasgehalte, Regelungsschwankungen und gegebenenfalls durch den Stoffauflauf 11.By means of these measurements, effects of changes in parameters and / or operating states in the constant part 24 on the stability of the basis weight of the fibrous web 5 can be determined. Possible reasons for an unstable surface weight, blistering and wrinkling are in the longitudinal profile dynamic pressure fluctuations, high gas contents, fabric density fluctuations, oscillations on the headbox 11, vibrations in the wire section 10, vacuum (vacuum) fluctuations on suction or in the vent tank 28 and due to variations the speeds of the sieves 12, 14. In the transverse profile results in an unstable and uneven basis weight due to fabric density fluctuations, high gas contents, control fluctuations and optionally through the headbox 11th

Zur Messung periodischer Druckpulsationen innerhalb des Konstantteils 24 für die Faserstoffsuspension 12 werden alle Signale einer Frequenzanalyse mit Hilfe eines schnellen Fouriertransformationsverfahrens (Fast Fourier Transformation = FFT) unterzogen, wobei eine Tiefpasseinstellung bei einer Frequenz fc von beispielsweise 1.000 Hz vorgenommen wird. Die Fourierspektren werden beispielsweise bis 150 Hz dargestellt. Anhand dieser Spektren lassen sich periodische Erreger von Störungen, zum Beispiel Pumpen, beispielsweise Verdünnungswasserpumpen, und Sortierer zum Aussondern von Fasern oder anderen Bestandteilen aus der Faserstoffsuspension 12, die eine bestimmte noch zulässige Größe von Partikeln im Bereich des Konstantteils überschreiten, identifizieren. Für durch diese verursachte Druckschwankungen gilt eine Tiefpass-Grenzfrequenz von beispielsweise 10 Hz.For measuring periodic pressure pulsations within the constant portion 24 for the pulp suspension 12, all signals are subjected to frequency analysis by means of a fast Fourier transformation method (Fast Fourier Transformation = FFT), wherein a low-pass adjustment is made at a frequency f c of, for example, 1000 Hz. The Fourier spectra are shown, for example, up to 150 Hz. From these spectra can be periodic exciters of disturbances, for example, pumps, such as dilution water pumps, and sorters for separating fibers or other components from the Pulp suspension 12, which exceed a certain permissible size of particles in the region of the constant part identify. For pressure fluctuations caused by these applies a low-pass cutoff frequency of, for example, 10 Hz.

Für Druckschwankungen ohne den Einfluss von Sortierern und Pumpen gilt eine Tiefpass-Grenzfrequenz von beispielsweise 2,5 Hz und für ausschließlich langwellige Druckschwankungen, die beispielsweise durch Regelungsschwankungen verursacht werden, eine Tiefpass-Grenzfrequenz von beispielsweise 0,1 Hz. Zur Bestimmung niederfrequenter Störungen werden aus den Zeitsignalen der Mittelwert, die Spannweite, die Standardabweichung und der Variationskoeffizient, das heißt das Verhältnis der Standardabweichung zum Mittelwert in Prozent, ermittelt. Stoffdichteschwankungen werden beispielsweise über einen Zeitraum von einigen Minuten ermittelt. Dabei wird das Messgerät durch eine Messreihe unter Zugabe von definierten Verdünnungswassermengen kalibriert.For pressure fluctuations without the influence of sorters and pumps applies a low-pass cutoff frequency of, for example, 2.5 Hz and for exclusively long-wave pressure fluctuations caused, for example, by control fluctuations, a low-pass cutoff frequency of 0.1 Hz, for example the mean time, span, standard deviation, and coefficient of variation, that is, the ratio of the standard deviation to the mean in percent. Substance density fluctuations are determined over a period of a few minutes, for example. The measuring instrument is calibrated by a series of measurements with the addition of defined amounts of dilution water.

Der Gasgehalt der Faserstoffsuspension 12 hat einen unmittelbaren Einfluss auf die Formation der Faserstoffbahn 5, auf die Entwässerungsleistung in der Siebpartie 10 und die Ausbreitungsgeschwindigkeit von Druckschwankungen (Schallgeschwindigkeit im Medium) und auf Flächengewichtsschwankungen durch Druckpulsationen. Gase existieren in der Faserstoffsuspension 12 in verschiedenen Zuständen, beispielsweise als freie Gase, das heißt Luftblasen in der Größenordnung von 1 µm bis 1 mm, die spontan ausgasen können, und als gelöste Gase. Die jeweiligen Anteile in der Faserstoffsuspension 12 variieren mit der Stoffzusammensetzung und dem Systemdruck. Es werden daher auch Maßnahmen getroffen, um den Gasgehalt in der Faserstoffsuspension 12 am Ausgang des Entlüftungsbehälters 28 auf einen noch zulässigen Wert zu begrenzen.The gas content of the pulp suspension 12 has a direct influence on the formation of the fibrous web 5, on the dewatering performance in the wire section 10 and the propagation speed of pressure fluctuations (sound velocity in the medium) and on surface weight fluctuations by pressure pulsations. Gases exist in the pulp suspension 12 in various states, for example as free gases, that is to say air bubbles in the order of 1 μm to 1 mm, which can outgas spontaneously, and as dissolved gases. The respective proportions in the pulp suspension 12 vary with the composition of matter and the system pressure. Therefore, measures are also taken to limit the gas content in the pulp suspension 12 at the outlet of the venting container 28 to a still permissible value.

Im Bereich des Stoffauflaufs 11 und in dem der Siebpartie 10 werden vorzugsweise Schwingungsmessungen durchgeführt. Die Schwingungen werden sowohl auf der Führer- als auch auf der Triebseite der Maschine 1 jeweils in allen drei Raumrichtungen gemessen und nach der ISO-Richtlinie 10816-1 Klasse III (Anhang A01) bewertet. Gemäß dieser Richtlinie werden mechanische Schwingungen im Hinblick auf ihre Zulässigkeit mit Hilfe des Effektivwertes der Schwingungsgeschwindigkeit beurteilt. Bei Schwingungen mit dominierenden Frequenzanteilen unter 10 Hz wird zusätzlich die Schwingung (die Schwingungsamplitude) als Kriterium herangezogen.In the area of the headbox 11 and in the wire section 10 vibration measurements are preferably carried out. The vibrations are measured both on the driver's and on the drive side of the machine 1 in each of the three spatial directions and evaluated in accordance with the ISO Directive 10816-1 Class III (Annex A01). According to this guideline, mechanical vibrations are judged with regard to their permissibility by means of the effective value of the vibration speed. In the case of oscillations with dominant frequency components below 10 Hz, the oscillation (oscillation amplitude) is additionally used as a criterion.

Die Online-Transmissionsmessungen der Faserstoffbahn 5 werden vorzugsweise im Bereich der Trockenpartie 16 und die Offline-Probenmessungen der Faserstoffbahn 5, insbesondere nach den Messmethoden von Tapio und/oder Boyle, im Bereich der Wickelmaschine 22 durchgeführt. Der Sensor für die Online-Transmissionsmessung durchleuchtet die Faserstoffbahn 5 und stellt ein Hell-Dunkel-Signal als Analogsignal zur Verfügung. Auch aus der Frequenzanalyse dieses Signals lassen sich eventuelle periodische Schwankungen ablesen. Aufgrund des Flatterns der Faserstoffbahn 5 lässt sich das Spektrum unterhalb einer bestimmten Frequenz, beispielsweise 3 Hz, nur noch bedingt verwerten. Das Ausgangssignal wird gemäß einer Kalibriervorgabe auf das Flächengewicht normiert. Bei der Auswertung dieser Messergebnisse sind optische Störeffekte im Papier, wie zum Beispiel Glanzstoffschwankungen, zu berücksichtigen, die zu Verfälschungen führen können.The on-line transmission measurements of the fibrous web 5 are preferably carried out in the region of the dryer section 16 and the offline sample measurements of the fibrous web 5, in particular according to the measuring methods of Tapio and / or Boyle, in the area of the winding machine 22. The sensor for online transmission measurement illuminates the fibrous web 5 and provides a light-dark signal as an analogue signal. From the frequency analysis of this signal can be read off any periodic fluctuations. Due to the fluttering of the fibrous web 5, the spectrum below a certain frequency, for example, 3 Hz, can be recycled only conditionally. The output signal is normalized to the basis weight according to a calibration specification. When evaluating these measurement results, optical interference effects in the paper, such as luster variations, must be taken into account, which can lead to falsifications.

Wenn die Qualität der Faserstoffbahn 5 bei den erfindungsgemäß durchgeführten Messungen als unzureichend eingestuft wird, werden die Störungen daraufhin analysiert, ob sie periodisch auftreten oder ob sie stochastisch (zufällig) sind; Störungen werden mittels eines schnellen Fouriertransformationsverfahrens in ihre periodischen und ihre zufälligen Anteile zerlegt. Mittels des Rechners 31 werden dann die relevanten Störpotenziale zu den simultan durchgeführten Messungen im Nassteil, das heißt in dem Bereich, in dem eine noch nicht getrocknete Faserstoffbahn 5 oder vorher die Faserstoffsuspension 12 vorhanden ist, zugeordnet. Aus der Auswertung der Messergebnisse werden Empfehlungen zur Beseitigung von stochastischen Störungen gegeben, beispielsweise zur Verbesserung der Stoffdurchmischung, zur Änderung der Rohrleitungsführung, etc. Ebenso lassen sich periodische Störungen beseitigen, die durch Unwuchten an Rotoren zum Antrieb von Zylindern oder Walzen entstehen und die sich beispielsweise durch den Austausch von Lagern beseitigen lassen, etc.. Aber auch wenn die gemessene Qualität der Faserstoffbahn 5 gut ist, lassen sich Überlegungen anstellen, an welchen Stellen beziehungsweise in welchen Bereichen im Konstantteil 24 und/oder in der Maschine 1 noch ein Optimierungspotenzial zur weiteren Anhebung der Qualität besteht.If the quality of the fibrous web 5 is classified as insufficient in the measurements carried out according to the invention, the disorders are analyzed as to whether they occur periodically or whether they are stochastic (random); Disturbances are decomposed by means of a fast Fourier transformation method into their periodic and their random components. By means of the computer 31, the relevant interference potentials are then assigned to the measurements carried out simultaneously in the wet part, that is to say in the region in which a fibrous web 5 which has not yet dried or previously the fibrous stock suspension 12 is present. From the evaluation of the measurement results recommendations for the elimination of stochastic disturbances are given, for example to improve the substance mixing, to change the piping, etc. Similarly, can eliminate periodic disturbances caused by imbalances on rotors for driving cylinders or rollers and, for example can be eliminated by the exchange of bearings, etc .. But even if the measured quality of the fibrous web 5 is good, can be thought of at what points or in which areas in the constant part 24 and / or in the machine 1 nor an optimization potential for further Raising the quality exists.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Maschinemachine
55
FaserstoffbahnFibrous web
1010
SiebpartieWire section
1111
Stoffauflaufheadbox
1212
FaserstoffsuspensionFibrous suspension
1313
Untersiebbottom wire
1414
Obersiebtop wire
1515
Pressenpartiepress section
1616
Trockenpartiedrying section
1717
Trockenzylinderdrying cylinders
1818
Umlenkzylinderdeflecting cylinder
1919
Streichwerkcoater
2020
Trocknungseinrichtungdrying device
2121
Kalandercalender
2222
Wickelmaschinewinder
2323
Wickelrollereel
2424
Konstantteilconstant part
2525
BĂĽttevat
2626
Leitungssystemline system
2727
Reinigungseinheitcleaning unit
2828
Entlüftungsbehälterbleed tank
2929
DatenbankDatabase
3030
Datenerfassungs- und AnalysesystemData acquisition and analysis system
3131
Rechnercalculator
3232
Gerät (Pfeil)Device (arrow)
LL
Laufrichtung (Pfeil)Running direction (arrow)

Claims (23)

  1. Method for producing a standardized state analysis of parameters and/or operating conditions influencing the quality of a fibrous web (5) to be manufactured, in particular a paper or board web, during manufacture of the fibrous web (5), the individual parameters and/or operating conditions being registered by means of standardized sequences and prepared by means of standardized evaluation methods, and the prepared parameters and/or operating conditions being stored in a database (29) and correlated with the parameters of the fibrous web (5) to be manufactured, in particular the grammage,
    characterized in that
    the parameters and/or the operating conditions are registered on-line in multiples, preferably in their entirety, simultaneously over defined time intervals, wherein
    the parameters and/or the operating conditions of at least one fibrous suspension (12) and at least one additive thereto used for manufacturing the fibrous web (5), and also
    the parameters and/or the operating conditions of the machine (1) for manufacturing the fibrous web (5) and of the approach flow system (24) are registered.
  2. Method according to Claim 1,
    characterized in that
    the parameters of the fibrous web (5) to be manufactured are preferably registered along the manufacturing process.
  3. Method according to either of the preceding claims,
    characterized in that
    the parameters and/or the operating conditions are registered by means of standardized data sheets.
  4. Method according to one of the preceding claims,
    characterized in that
    frequency-range-specific limiting values are determined and defined for the parameters and/or operating conditions prepared by means of standardized evaluation methods, based on at least one determined parameter of the fibrous web (5) to be manufactured.
  5. Method according to Claim 1,
    characterized in that
    the parameters and/or the operating conditions of the approach flow system (24) are registered by means of approach flow system measurements, in particular pulsation, consistency fluctuation, gas content, vibration, pH, rotational speed, temperature and flow rate measurements.
  6. Method according to Claim 1,
    characterized in that
    the parameters and/or the operating conditions of the machine (1) for manufacturing the fibrous web (5) are registered by means of vibration measurements, preferably in the area of the flow box and/or the wire section, by means of vacuum measurements or by means of speed measurements of the jet or of clothing, in particular of wires and felts.
  7. Method according to Claim 1, 5 or 6,
    characterized in that
    the parameters and/or the operating conditions of the machine (1) for manufacturing the fibrous web (5), in particular machine settings, machine and device types, machine configurations, are registered, in particular as a function of defined registration positions and with defined production settings.
  8. Method according to Claim 1, 5, 6 or 7,
    characterized in that
    the parameters and/or the operating conditions of the machine (1) for manufacturing the fibrous web (5) and/or of the approach flow system (24) are registered by means of at least one stock and water circuit balance, preferably a plurality thereof.
  9. Method according to Claim 8,
    characterized in that
    the data needed for the stock and water circuit balance, in particular consistencies, flow rates, retention, retention aid volume/type, defoamer volume/type, deaerator volume/type, conductivity values, cationic demand values, zeta potential values, levels of refining and auxiliary addition volumes, are registered, in particular as a function of defined registration positions and with defined production settings.
  10. Method according to one of the preceding claims,
    characterized in that
    possible automation influences of various systems, in particular oscillating control loops, are identified and sluggish and/or sensitive systems are optimized.
  11. Method according to Claim 2,
    characterized in that
    the parameters of the fibrous web (5) to be manufactured are registered by means of quality investigations, such as on-line transmission measurements of the fibrous web (5) and off-line sample measurements of the fibrous web (5), in particular in accordance with the measuring methods of Tapio and/or Boyle.
  12. Method according to one of the preceding claims,
    characterized
    in that the parameters and/or the operating conditions are represented as functions of the frequency and
    in that the registered values of the parameters and/or the operating conditions are assessed as a function of the frequency range.
  13. Method according to Claim 12,
    characterized in that
    the registered values of the parameters and/or of the operating conditions are filtered with defined low-pass, high-pass or band-pass frequencies.
  14. Method according to one of the preceding claims,
    characterized in that
    the registered values of the parameters and/or of the operating conditions are compared with predefined set points and any deviations are assigned to those causing them.
  15. Machine (1) for manufacturing a fibrous web (5), in particular a paper or board web, comprising means for carrying out the method according to one of the preceding claims.
  16. Machine (1) according to Claim 15,
    characterized in that
    it comprises an in particular multi-channel data acquisition and analysis system (30), and/or in particular one supported by at least one computer (31) .
  17. Machine (1) according to either of Claims 15 and 16,
    characterized in that
    it has devices (32) for measuring vibrations, in particular vibration sensors or acceleration transducers with preferably electronic integrators.
  18. Machine (1) according to one of Claims 15 to 17,
    characterized in that
    it has rotational speed measuring devices (32), in particular with reflection probes.
  19. Machine (1) according to one of Claims 15 to 18,
    characterized in that
    it has pressure sensors, in particular for measuring absolute pressures and/or pressure fluctuations.
  20. Machine (1) according to one of Claims 15 to 19,
    characterized in that
    it has gas content measuring devices (32) for free and/or dissolved components, in particular operating in accordance with the Boadway method.
  21. Machine (1) according to one of Claims 15 to 20,
    characterized in that
    it has devices (32) for the on-line analysis of the fibrous web (5), in particular transmission sensors.
  22. Machine (1) according to one of Claims 15 to 21,
    characterized in that
    it has Boyle analysers and/or Tapio profilers for the off-line analysis of the fibrous web (5).
  23. Machine (1) according to one of Claims 15 to 22,
    characterized in that
    it has in particular continuously measuring consistency measuring devices (32).
EP04100401.1A 2003-02-11 2004-02-04 Method for producing a standardized state analysis of parameters and/or operating conditions influencing the quality of a fibrous web during manufacture thereof and machine for carrying out the method Expired - Lifetime EP1447473B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10305596 2003-02-11
DE2003105596 DE10305596A1 (en) 2003-02-11 2003-02-11 Method for creating a standardized state analysis of parameters and / or operating states influencing the quality of the fibrous web to be produced during the production of a fibrous web and machine for carrying out the method

Publications (4)

Publication Number Publication Date
EP1447473A2 EP1447473A2 (en) 2004-08-18
EP1447473A3 EP1447473A3 (en) 2008-11-05
EP1447473B1 EP1447473B1 (en) 2012-08-29
EP1447473B2 true EP1447473B2 (en) 2019-05-01

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Country Status (2)

Country Link
EP (1) EP1447473B2 (en)
DE (1) DE10305596A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009450B4 (en) * 2005-03-07 2008-07-31 Siemens Ag Method for quality assurance in papermaking
DE102012204067A1 (en) * 2012-03-15 2013-09-19 Voith Patent Gmbh Method for controlling or regulating fibrous web manufacturing process, particularly for manufacturing a paper-, tissue- or board web, involves manufacturing fibrous web, particularly from stock suspension in machine
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
DE102019127670A1 (en) * 2019-10-15 2021-04-15 Voith Patent Gmbh Process for the production of finished rolls of fibrous web

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5932792A (en) † 1998-04-28 1999-08-03 Dougherty; Steven J. Apparatus for measuring entrained gas-phase content in a liquid
WO2000055421A1 (en) † 1999-03-15 2000-09-21 Voith Paper Patent Gmbh Method for operating a machine for producing and/or improving material webs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463269B (en) * 1984-04-11 1990-10-29 Sensodec Oy PROCEDURE AND DEVICE TO LOCATE ERRORS IN THE FUNCTION OF A PAPER MACHINE PARTS
US6024835A (en) * 1992-08-28 2000-02-15 Fiore; Leonard F. Quality control apparatus and method for paper mill
DE19510009C2 (en) * 1995-03-23 2000-05-11 Siemens Ag Process and device for process control of a paper machine
FI113089B (en) * 1999-10-06 2004-02-27 Liqum Oy Method for analyzing papermaking process and electrochemical sensor for analyzing liquid
CA2404968C (en) * 2000-04-05 2011-08-30 Liqum Oy Method and system for monitoring and analyzing a paper manufacturing process
FI20021901A0 (en) * 2002-10-24 2002-10-24 Liqum Oy Procedure for controlling a process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5932792A (en) † 1998-04-28 1999-08-03 Dougherty; Steven J. Apparatus for measuring entrained gas-phase content in a liquid
WO2000055421A1 (en) † 1999-03-15 2000-09-21 Voith Paper Patent Gmbh Method for operating a machine for producing and/or improving material webs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"mit Pressemitteilung Technologies", Retrieved from the Internet <URL:http://www.tapiotechnologies.fi/news.html> †

Also Published As

Publication number Publication date
DE10305596A1 (en) 2004-09-02
EP1447473A2 (en) 2004-08-18
EP1447473A3 (en) 2008-11-05
EP1447473B1 (en) 2012-08-29

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