CN1179191A - Method and device for process control in paper and carboard manufacture - Google Patents
Method and device for process control in paper and carboard manufacture Download PDFInfo
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- CN1179191A CN1179191A CN 96192749 CN96192749A CN1179191A CN 1179191 A CN1179191 A CN 1179191A CN 96192749 CN96192749 CN 96192749 CN 96192749 A CN96192749 A CN 96192749A CN 1179191 A CN1179191 A CN 1179191A
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Abstract
The present invention provides a method and apparatus for controlling process of a paper or paper board production, It has already been proposed to use measuring devices to detect spectral and/or physical characteristics with a subsequent neuronal network in the production of de-inked cellulose, where corrections for an existing regulating or control device for the operating means are obtained. According to the invention, the measuring devices are used to check the raw materials for paper and cardboard production and/or their intermediate or end products. It thus becomes possible to discover data on the quality of the paper and cardboard from which signals for backward and/or forward control can be derived.
Description
The present invention relates to a kind of course control method for use and equipment that is used for the paper machine of papermaking and/or papermaking plate, wherein adopt at least one measurement mechanism of measuring physical parameter and adjustment or the control device that at least one is used for the employed travelling mechanism of paper machine.
In not disclosed in advance old International Patent Application WO 95/08019A1, advise a kind of equipment, be used to move a kind of equipment of special manufacturing de inked pulp, which comprises at least a Waste Paper Handling device, established a Water Extraction Machinery or at least one paper machine in its downstream.Wherein used some measurement mechanisms, be used to measure the spectrum and/or the physical parameter of waste paper suspension, wherein otherwise measurement mechanism guide the Waste Paper Handling device into, or the Waste Paper Handling device is in the other process of measurement mechanism.In addition, the adjustment or the control device of Waste Paper Handling device travelling mechanism have also been used there, and there is at least one its form to be designed to the waste paper suspension state analyzer of one or more parallel neutral nets, it provides the adjusting parameter by means of the parameter of measurement mechanism, is used for carrying out process control at the adjustment or the control device of Waste Paper Handling device travelling mechanism.
Making the problem that exists in the equipment of de inked pulp in the big as far as possible waste paper share of above-mentioned employing mainly is that the waste paper mass change that adds in equipment is very big.For example the mixing of each waste paper may make for example cromogram drawing paper; The grey old newspaper; Blank sheet of paper; Dirty paper; For example with the secondhand book of the book back, for example telephone directory, hardboard are written, wrapping paper, coated paper, and the mixed proportion of various types of dirts alters a great deal.The equipment of introducing in advance in this old patent application has solved this problem with satisfactory way at Waste Paper Handling.
The objective of the invention is by contrast, in a kind of paper machine, directly use measuring principle as these Equipment Foundations of introducing in advance.
The object of the present invention is achieved like this, and the spectrum parameter when promptly measuring paper machine and produce the material different wave length by means of measurement mechanism wherein, is produced material and is directly the raw material before the paper machine charging gear and/or be intermediate products or final products; And, by the signal of at least one neutral net evaluate spectra parameter measuring apparatus, and the explanation that draws relevant product quality thus.These are the mass parameter of paper or cardboard especially.
Adopt the present invention to be provided in the paper machine possibility first by means of the spectrometer on-line measurement.Therefore, by the quality metric coefficient of suitable assessment and definite paper or cardboard, can also in the pulp treating apparatus of paper machine, exert one's influence to the parameter that influences quality.So exempted so far usually in time delay that laboratory measurement causes.
Adopt the present invention advantageously can derive some semaphores, these semaphores are used for reverse adjustment in the so-called pulp treating apparatus before using paper machine on the one hand, are used for the forward adjustment of paper machine itself on the other hand.When oppositely adjusting, predesignate the parameter of pulp treating apparatus, so that obtain to guaranteeing the paper or the desired pulp quality of cardboard quality of regulation.When forward is adjusted, should control the travelling mechanism of paper machine so on the contrary, that is, when given pulp quality, reach the paper or the cardboard quality of regulation.
Relevant device adopts spectroscope or spectrometer, is mainly used in receiving spectrum and distributes or score.Use neutral net with known manner within the scope of the invention, be used for evaluate spectra and/or physical parameter.As the input quantity of neutral net, preferably utilize the reflected intensity of the scattering of the spectral region of selecting, or the intensity in transmission of scattering.Preferably can also adopt the parameter of other pulp suspension or paper or cardboard, for example denseness, humidity, weight per unit area etc. as the input quantity of neutral net.The output quantity of neutral net is the paper made or the mechanical quality parameter of cardboard, especially for example so-called CMT coefficient, tears length, rupture stress and other is for the significant factor of the actual applicability of paper.Neutral net can be trained by means of the mass parameter that off-line in the laboratory is measured.
Other details of the present invention and advantage provide to the explanation of embodiment and in conjunction with claim by means of accompanying drawing by following, in the accompanying drawing:
Fig. 1 is the Application Example with paper machine;
The two kind neural localized networks of Fig. 2 and 3 in Fig. 1, adopting; And
Fig. 4 to 7 is for using the different schemes of spectrometer.
Same in the accompanying drawings or act on identical part corresponding Reference numeral is arranged.To these accompanying drawings, part is given common introduction.
Represent paper making equipment with 1 among Fig. 1, it mainly comprises the real paper machine of so-called paper pulp inlet 2, band paper pulp outlet 3, at other roller path 5 to 8 of screen cloth conveyer belt 4, drying and the coiling paper web 110 of the wet paper web of the conveying in downstream, and comprise a hot press 9.Especially hot press 9 can be located between drying device 7 and 8.This class is used for that the equipment of papermaking is known to be had diversified art designs and use in practice.
In pressing the equipment of Fig. 1, first spectrometer 10 is located at paper pulp 2 zones that enter the mouth, the pulp suspension that its measurement zone 11 is aimed at as the original material of papermaking.Second spectrometer 10 ' before hot press 9 is with its measurement zone 11 ' directly aim at paper web 110.In addition, " aim at the spectrometer 10 on the paper of gummed " and be located at the coiler device front that not have of being attached thereto represented in detail in hot press 9 back and with its measurement zone 11 for the 3rd.
Represent one three layers neutral net with 20 among Fig. 2, it for example is made up of the outlet neuron AN1 under inlet neuron EN1 to EN7, other neuron ZN1 to ZN5 and.By means of the spectrum of neutral net 20 first spectrometers 10 of assessment, wherein adopt preferential wavelength X in Fig. 2 a schematic graph as the input of neutral net 20
iThe reflected ray intensity I
1To I
nBy intensity I
iAnd i=1 ..., n can obtain the explanation of the quality of the relevant paper that will produce.These data can be used for reverse adjustment on the one hand in pulp treating apparatus, can be used for the forward adjustment in paper machine 1 itself on the other hand.
Represented another kind of three layers neutral net 30 in Fig. 3, it has inlet neuron EN8 to EN12, other neuron ZN6 to ZN9 and an outlet neuron AN2.By means of this second neutral net by as corresponding mode evaluate spectra 10 among Fig. 2 ' and 10 ".Recommending to adopt the humidity of paper web 110 as other input quantity is measured value.Can obtain the explanation of the product quality of relevant finished paper or finished product cardboard thus.In addition, can obtain mechanical parameter, as the so-called CMT factor, tear length and rupture stress.
Also can be this two other spectrometer 10 ' and 10 " respectively establish oneself a neural localized network.These neutral nets by Fig. 2 and 3 also can merge, and the connection by them has improved to deriving the reliability of measured value in this case.
Diagram by Fig. 4 to 7 has provided spectrometer selectable use possibility in the scope of papermaking and papermaking plate.A unit that is used for pulp processing 50, so-called paper pulp center 70, a neutral net 200 that sets for paper machine with the paper machine 1 corresponding paper machine 100 of Fig. 1 and are all arranged in Fig. 4 to 7 uniformly, and the latter is corresponding with the neutral net 20 of Fig. 1.Unit 50,70,100 and 200 connects into a work loop.
In Fig. 4, set spectrometer 10 by Fig. 1 for the unit 50 that is used for pulp processing.It for example can measure paper pulp or different waste paper materials there, and this represents with parallel arrow.Suitable raw material through the paper pulp center 70 to paper machine 100.Except the signal of spectrometer, the data of neuralward network 200 input machine parameters and relevant desired paper quality.After the laboratory measurement of finished paper being carried out the off-line training, can will be defeated by paper pulp center 70 at the desired mixing arrangement parameter of raw material by means of neutral net 200.
Measurement by means of spectrometer 10 in Fig. 5 is carried out in the paper pulp porch of paper machine 100, just carries out behind paper pulp center 70.When structure is identical in principle, provide such possibility in neutral net 200 here, that is, produced the conditioning signal that is used for pulp treating apparatus 50 on the one hand, produced the conditioning signal that is used for paper machine 100 on the other hand.
In the design of pressing Fig. 6, spectrometer 10 is contained in Manufactured paper or cardboard place, that is in paper machine 100 inside.According to Fig. 6,, also can obtain to be used for the conditioning signal at pulp treating apparatus 50 or paper pulp center 70 but then by means of the same adjusting parameter that can obtain to be used for paper machine 100 on the one hand of neutral net.
In the different schemes of expression, neutral net 200 always directly is equipped on paper machine 100, has predesignated the mechanical quality data of desired paper in this case as important parameter in Fig. 4 to 6.Enumerated an example in Fig. 7, it relates to pulp treating apparatus specially, that is the unit 50 of Fig. 4 to 6.Be used for the unit 50 of pulp processing except having known discrete component such as pulper, disk mill etc., also have one here and be used for the unit 55 that paper pulp decomposes, mainly handle waste paper by means of it, and share in accordance with regulations is mixed into a kind of suitable pulp suspension.
In Fig. 7,, desired fiber quality is imported wherein as characteristic parameter for the unit 50 that is used for pulp processing sets a neutral net 220.Before original pulp treating apparatus 50, measure paper pulp after decomposing in this case by means of spectrometer 10, and with the strength signal input neural network 220 that records.After neutral net 220 is suitably trained, can obtain be used for the suitable conditioning signal of pulp treating apparatus according to measured value.
In giving an example, each shows, by by means of one or more spectrometer on-line measurements, assess and the paper determining to produce or the quality metric coefficient of cardboard, can onlinely influence the parameter of the quality-determining of pulp treating apparatus and paper machine by means of one or more neutral nets.Therefore, compare, cancelled disadvantageous time delay with the discontinuous method by means of laboratory measurement so far.
Claims (12)
1. course control method for use that is used for the paper machine of papermaking and/or papermaking plate, wherein adopt at least one to measure measurement mechanism and an adjustment or a control device that is used for the employed travelling mechanism of paper machine of physical parameter, it is characterized in that: by means of measurement mechanism (10,10 ', spectrum parameter when 10 ") are measured paper machine and produced the material different wave length; wherein, produce material and be directly the raw material before paper machine paper pulp charging gear and/or be intermediate products or final products; And, by at least one neutral net (20,30,200,220) evaluate spectra parameter measuring apparatus (10,10 ', the signal of 10 "), and the explanation that draws relevant product quality thus.
2. it is characterized in that in accordance with the method for claim 1: the reflected intensity (I that measures the spectral region scattering of selecting
i, i=1 wherein ..., n).
3. it is characterized in that in accordance with the method for claim 1: the intensity in transmission of measuring the spectral region scattering of selecting.
4. in accordance with the method for claim 1, adopted a kind of paper machine or made board machine, it is characterized in that: the pulp suspension of measuring input paper machine (1,100).
5. in accordance with the method for claim 1, adopted a kind of paper machine or made board machine, it is characterized in that: be determined at paper machine (1,100) and go up paper or the cardboard that flows.
6. according to claim 4 or 5 described methods, it is characterized in that: METHOD FOR CONTINUOUS DETERMINATION pulp suspension and/or paper or cardboard.
7. it is characterized in that in accordance with the method for claim 1: neutral net (20,30,200,220) is trained by means of the mass parameter of paper that records in the laboratory or cardboard.
8. it is characterized in that in accordance with the method for claim 1: derive the control signal that in so-called pulp treating apparatus (50), is used for reverse adjustment.
9. it is characterized in that in accordance with the method for claim 1: derive the control signal that in the paper machine (100) that adopts, is used for the forward adjustment.
10. according to the described method of above-mentioned each claim, wherein, it is characterized in that: in paper pulp center (70), carry out the paper pulp mixing according to the spectrum parameter of each a fluid stream or by means of the paper pulp score of leaving paper pulp center (70) by means of a paper pulp center for papermaking and papermaking plate pulp treatment.
11. an enforcement is according to the equipment of one of claim 1 or claim 2 to 10 described method, it has at least one measurement mechanism that is used to measure spectrum and/or physical parameter and at least one is used for the adjustment or the control device of employed travelling mechanism, wherein, the measurement mechanism of spectrum parameter is to be used to be determined at different wave length (λ
i) time intensity measurements (I
i) spectrometer (10,10 ', 10 "),, can derive and be used to adjust or the corrected signal of control device by suitably assessment by intensity measurements.
12., it is characterized in that:, have a neutral net (20,30,220,230) at least in order to assess according to the described equipment of claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96192749 CN1179191A (en) | 1995-03-23 | 1996-03-19 | Method and device for process control in paper and carboard manufacture |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19510009.3 | 1995-03-23 | ||
| CN 96192749 CN1179191A (en) | 1995-03-23 | 1996-03-19 | Method and device for process control in paper and carboard manufacture |
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| CN1179191A true CN1179191A (en) | 1998-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96192749 Pending CN1179191A (en) | 1995-03-23 | 1996-03-19 | Method and device for process control in paper and carboard manufacture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100492005C (en) * | 2003-11-14 | 2009-05-27 | 阿克佐诺贝尔公司 | System and method for monitoring paper-making process |
| CN101133209B (en) * | 2005-02-23 | 2010-10-06 | Abb有限公司 | Actuator system for use in control of a sheet or web forming process |
| CN102094344A (en) * | 2010-12-08 | 2011-06-15 | 陕西科技大学 | Wastepaper disintegrating method |
| CN102605663A (en) * | 2012-03-20 | 2012-07-25 | 湖南骏泰浆纸有限责任公司 | Wood chip flow monitoring system and stable pulping continuous digesting method |
| CN110536984A (en) * | 2017-04-18 | 2019-12-03 | 西门子股份公司 | Run method, drive system and the paper machine of paper machine |
| CN110877839A (en) * | 2018-09-06 | 2020-03-13 | 西门子（中国）有限公司 | Method and equipment for processing broken paper |
-
1996
- 1996-03-19 CN CN 96192749 patent/CN1179191A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100492005C (en) * | 2003-11-14 | 2009-05-27 | 阿克佐诺贝尔公司 | System and method for monitoring paper-making process |
| CN101133209B (en) * | 2005-02-23 | 2010-10-06 | Abb有限公司 | Actuator system for use in control of a sheet or web forming process |
| CN102094344A (en) * | 2010-12-08 | 2011-06-15 | 陕西科技大学 | Wastepaper disintegrating method |
| CN102094344B (en) * | 2010-12-08 | 2012-07-25 | 陕西科技大学 | Wastepaper disintegrating method |
| CN102605663A (en) * | 2012-03-20 | 2012-07-25 | 湖南骏泰浆纸有限责任公司 | Wood chip flow monitoring system and stable pulping continuous digesting method |
| CN110536984A (en) * | 2017-04-18 | 2019-12-03 | 西门子股份公司 | Run method, drive system and the paper machine of paper machine |
| CN110877839A (en) * | 2018-09-06 | 2020-03-13 | 西门子（中国）有限公司 | Method and equipment for processing broken paper |
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