FI92742C - Diagnosis of paper machine wet chemistry disorders - Google Patents
Diagnosis of paper machine wet chemistry disorders Download PDFInfo
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- FI92742C FI92742C FI911685A FI911685A FI92742C FI 92742 C FI92742 C FI 92742C FI 911685 A FI911685 A FI 911685A FI 911685 A FI911685 A FI 911685A FI 92742 C FI92742 C FI 92742C
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- Prior art keywords
- signals
- normal
- devices
- periodicity
- pulp
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- 238000003745 diagnosis Methods 0.000 title description 2
- 238000007704 wet chemistry method Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims description 40
- 238000004148 unit process Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000003111 delayed effect Effects 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- -1 silicate ion Chemical class 0.000 claims description 4
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 230000001902 propagating effect Effects 0.000 claims 2
- 230000004807 localization Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 description 21
- 239000000123 paper Substances 0.000 description 19
- 150000002500 ions Chemical class 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 5
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000012731 temporal analysis Methods 0.000 description 1
- 238000000700 time series analysis Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/78—Controlling or regulating not limited to any particular process or apparatus
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/34—Paper
- G01N33/343—Paper pulp
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Paper (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
9274292742
PAPERIKONEEN MARKAOSAKEMIAN HÅIRIOIDEN DIAGNOSTOINTIDIAGNOSTICS OF PAPER MACHINE MARKET CHEMISTRY
Keksinnon kohteena on paperikoneen mårkåosan kemian håirioiden diagnostisointi. Erityisesti keksin-5 non kohteena on menetelma paperikoneen markaosaan hai-rioita aiheuttavien laitteiden ja/tai yksikkoprosessien paikallistamiseksi. Edelleen keksinnon kohteena on vastaava laitteisto.The invention relates to the diagnosis of chemical disorders in the wet part of a paper machine. In particular, the invention relates to a method for locating devices and / or unit processes which cause disturbances in a brand part of a paper machine. The invention further relates to a corresponding apparatus.
Tassa kuvauksessa paperilla tarkoitetaan ta-10 vallista paperia, kartonkia tai mita muuta tahansa vastaavalla prosessilla valmistettavaa rainamaista tuotetta.In this description, paper means plain paper, paperboard or any other web-like product produced by a similar process.
Paperikoneen mårkåosan kemian håiriot ovat merkittåviå paperikoneen tuotantotalouden kannalta. 15 Kemian håirioiden aiheuttamat tuotantotappiot ovat esim. 2 - 10 % hyotysuhteesta. Lisåksi kemian håiriot aiheuttavat tuotannon laatutason alenemista.The chemical disturbances in the wet part of the paper machine are significant for the production economy of the paper machine. 15 Production losses caused by chemical disturbances are, for example, 2 - 10% of the efficiency ratio. In addition, chemical disturbances cause a decrease in the quality level of production.
Paperikoneen mårkåosan kemia on hyvin monimut-kainen, voimakkaasti vuorovaikutteinen jårjestelmå. 20 Jårjestelmå alkaa erillisiltå massalinjoilta, joilla on vaikutuksia mårkåpåån kiertoon ja edelleen paperiin, joka vaikuttaa edelleen mårkåosan kemiaan hylytyksen kautta. Mårkåosan kemiaan vaikuttaa lisåksi esim. eri-laiset sekoitusvaiheet, erilaiset pumppausvaiheet, 25 kemikaalien sekoitus ja yleenså kaikki mårkåosan pro- sessivaiheet, toiminnat ja olosuhteet.The chemistry of the wet part of a paper machine is a very complex, highly interactive system. 20 The system starts with separate pulp lines that have an effect on the wet circuit and further on the paper, which still affects the chemistry of the wet part through the wreck. The chemistry of the wet section is further affected by, for example, different mixing steps, different pumping steps, mixing of the chemicals and, in general, all the process steps, operations and conditions of the wet section.
Paperikoneen mårkåosan kemian dynamiikka on ongelmallista. Prosessin osien aikavakiot vaihtelevat laajoissa rajoissa alkaen η. 1 min tasolta ja jatkuen 30 aina useisiin vuorokausiin. Lisåksi laboratoriomååri- tyksiå ei voida tehdå riittåvån usein ja kattavasti. Lisåksi on-line-antureita kåytetåån yleenså suhteelli-sen våhån.The chemical dynamics of the wet part of a paper machine is problematic. The time constants of the process parts vary within wide limits starting from η. 1 min from level and continuing for 30 all the way to several days. In addition, laboratory tests cannot be performed frequently and comprehensively enough. In addition, on-line sensors are generally used relatively little.
Esillå olevan keksinnon tarkoituksena on pois-35 taa edellå esitetyt epåkohdat ja erityisesti parantaa paperikoneen mårkåosan ajettavuutta parantamalla mårkåosan kemian hallintaa erityisesti poistamalla saostumi- 2 92742 i en ja/tai mikrobien aiheuttamia håirioitå ja tarkkaile-malla lyhyeen kiertoon kumuloituvia ionipitoisuuksia.The object of the present invention is to obviate the above-mentioned drawbacks and in particular to improve the runnability of the wet section of a paper machine by improving the chemical control of the wet section, in particular by removing disturbances caused by precipitation and / or microbes and monitoring short-cycle ion concentrations.
Edelleen keksinnon tarkoituksena on parantaa markåosan ajettavuutta poistamalla kemian hairioiden 5 aiheuttamia håirioitå.It is a further object of the invention to improve the runnability of the marking part by eliminating the disturbances caused by chemical disturbances.
Edelleen keksinnon tarkoituksena on parantaa laadun tasaisuutta poistamalla retentiovaihteluiden aiheuttamia laatuhåirioitå.It is a further object of the invention to improve the uniformity of quality by eliminating quality disturbances caused by retention variations.
Lisåksi keksinnon tarkoituksena on tuoda esil-10 le uusi menetelmå ja laitteisto paperikoneen mårkåosaan virheitå aiheuttavien kone-elimien måårittåmiseksi.In addition, it is an object of the invention to provide a new method and apparatus for determining defective machine members in the body of a paper machine.
Keksinnolle tunnusomaisten seikkojen osalta viitataan patenttivaatimuksiin.For aspects of the invention, reference is made to the claims.
Keksinto perustuu paperikoneen mårkåosan kemi-15 an jatkuvaan on-line seurantaan. Mårkåosasta detektoi-daan jatkuvasti ainakin sakeus, pH, johtokyky ja annos-teluiden virtaukset sekå lisåksi Ca-, Al- ja silikaat-ti-ionipitoisuudet, vastaavia signaaleja seurataan jatkuvasti ja håiribtilanteessa, signaalin poiketessa 20 normaalista, pyritåån loytåmåån ao. suureeseen håirion aiheuttava prosessilaite seuraamalla håirion esiinty-mistå eri mittasuureissa ja -pisteisså eri ajan hetkil-lå ja etsimållå signaalien våliset syy-seuraus-yhteydet aikasarja-analyysillå.The invention is based on the continuous on-line monitoring of the wet part Kemi-15 of a paper machine. At least the consistency, pH, conductivity and dosing currents of the wet part are continuously detected, as well as the Ca, Al and silicate tion ions, the corresponding signals are monitored continuously and in the event of a disturbance, the signal deviating from the normal, the process is detected. by monitoring the occurrence of the disturbance at different magnitudes and points at different times and looking for cause-and-effect relationships between the signals by time series analysis.
25 Edellå mainittujen suureiden ja ionipitoisuuk- *· sien lisåksi massasta voidaan måårittåå myos useita muita suureita, esim. sameus, varaustila, sulfaattipi-toisuus, Fe-, Mg- ja TOC-pitoisuudet (TOC = Total Organic Carbon) sekå muita haluttuja ionipitoisuuksia ja 30 orgaanisia yhdisteitå. Menetelmåsså voidaan måårittåå mainittuja suureita vastaavat signaalit, signaalien normaalitasot ja normaalikarakteristikat ja signaalien våliset siirtokarakteristikat. Suureiden seuranta ja esim. signaalimuodon tai taajuuden suureiden normaalis-35 ta poikkeavien arvojen vertailu, ao. suureeseen vaikut-tavien, edellisesså prosessivaiheessa olevien laittei-den kohdalta mitattujen suureiden signaalimuotoon. ao,In addition to the above-mentioned quantities and ionic concentrations, several other quantities can also be determined from the pulp, e.g. turbidity, state of charge, sulphate content, Fe, Mg and TOC (TOC = Total Organic Carbon) concentrations and other desired ionic concentrations. 30 organic compounds. In the method, signals corresponding to said quantities, normal levels and normal characteristics of the signals and transmission characteristics between the signals can be determined. Monitoring of the variables and, for example, a comparison of the non-normal values of the variables of the signal shape or frequency, to the signal shape of the variables measured in the previous process step affecting the quantity in question. ao,
IIII
3 92742 suureen håirion aiheuttajan paikallistamiseksi suorite-taan esim. mikroprosessorilla. Signaalin normaalitasol-la tarkoitetaan tåsså yhteydesså signaalin voimakkuutta hyvåksytyisså vaihtelurajoissa. Signaalin normaalika-5 rakteristikalla tarkoitetaan signaalin mitå tahansa ominaisuutta, kuten voimakkuutta, muotoa, jaksollisuut-ta tai jotain muuta ominaisuutta hyvåksytyisså vaihtelurajoissa; erityisen hyviin tuloksiin on påasty seu-raamalla signaalin muotoa.3,92742 to locate the cause of a large disturbance is performed, e.g., by a microprocessor. In this context, the normal level of the signal means the signal strength within the accepted ranges. By normal-5 characteristic of a signal is meant any property of the signal, such as strength, shape, periodicity, or some other property within the accepted ranges; particularly good results have been obtained by monitoring the shape of the signal.
10 Edelleen menetelmåssa voidaan haluttaessa maåratå ainakin kahden muodostetun signaalin suhde, esim. kahden ionipitoisuuden viivåstetty suhde ja nåi-den vålilla etenevån håiridn siirto-ominaisuudet, ionipitoisuuden ja jonkun muun suureen suhde tai kahden 15 muun kuin ionipitoisuuden viivåstetty suhde ja nåiden vålilla etenevån håirion siirto-ominaisuudet. Viivåste-tylle suhteelle ja håirion siirto-ominaisuuksille voidaan måårittåå normaalitaso ja normaalikarakteristika ja sitå voidaan haluttaessa verrata suhteeseer, vaikut-20 tavien laitteiden jaksollisuuteen.Further in the method, if desired, the ratio of at least two generated signals can be determined, e.g. features. For the delayed ratio and the disturbance transmission characteristics, a normal level and a normal characteristic can be determined and, if desired, compared with the periodicity of the devices affecting the ratio.
Suureiden detektointi ja vastaavien signaalien muodostus sekå edelleen signaalien kåsittely on sinånså tunnettua analyysitekniikkaa ja vahvistustekniikkaa, ja sitå ei kåsitellå yksityiskohtaisemmin tåsså yhteydes-25 så. Edelleen signaalin yhteenlasku ja/tai viivåstetyn suhteen muodostus niiden summan ja/tai suhteen vertai-lemiseksi on sinånså tunnettua signaalin kåsittelytek-niikkaa, eikå sitå kuvata tåsså yhteydesså. Edelleen håirion siirto-ominaisuuksien muodostus on sinånså 30 tunnettua signaalin kåsittelytekniikkaa. Edelleen las-kentayksikko, kuten mikroprosessori erilaisten signaalien kåsittelemiseksi, vertailemiseksi, signaalien jaksollisuuksien kåsittelemiseksi ja vertailemiseksi on sinånså tunnettua, eikå sitå kåsitellå yksityiskohtai-35 semmin tåsså yhteydesså.The detection of large quantities and the generation of corresponding signals, as well as further signal processing, are known per se as analysis techniques and amplification techniques, and will not be discussed in more detail in this context. Furthermore, summing the signal and / or forming a delayed ratio to compare their sum and / or ratio is a signal processing technique known per se and will not be described in this context. Furthermore, the generation of interference transmission characteristics is in itself a known signal processing technique. Further, a computing unit such as a microprocessor for processing, comparing, processing and comparing the periodicity of the signals is known per se and will not be discussed in more detail in this context.
Keksinnon mukaisella jårjestelmållå paperiko-neen mårkåosan kemiaa pystytåån seuraamaan yksityiskoh- 4 92742 taisesti ja tarkasti. Håiriotilanteessa, esim. jonkin ionipitoisuuden vaihdellessa epånormaalin laajoissa rajoissa, ionipitoisuuden vaihtelun låhde voidaan sel-vittaa seuraamalla ionipitoisuuden vaihtelun, so. håi-5 rion etenemista prosessissa håirion siirtotietå indi-koivien mååritysten ja detektorien avulla. Ionin epå-normaali vaihtelu voi taten johtua esim. ionia sisåltå-vån kemikaalin sekoituksen håiriotilanteesta, kuten kemikaalin syoton håiriostå, syottopumpun håiriostå, 10 seuraavan massapumpun håiriosta tms.With the system according to the invention, the chemistry of the wet part of the paper machine can be monitored in detail and accurately. In the event of a disturbance, e.g. when an ionic concentration varies within an abnormally wide range, the source of the ionic concentration variation can be determined by monitoring the ionic concentration variation, i. håi-5 The progress of Rio in the process by means of indicators and detectors indicative of the transmission path of the disturbance. Thus, the abnormal variation of the ion may be due to, for example, a disturbance of the ion-containing chemical mixture, such as a malfunction of the chemical, a malfunction of the feed pump, a malfunction of the next mass pump, and the like.
Keksinnon mukaisessa jårjestelmåsså paperiko-neen mårkåosan prosessiin, esim. kemiallisen massalin-jaan, mekaaniseen massalinjaan, hylkylinjaan, sekoitus-såilioon, konesåilioon, laimennuksen yhteyteen, pyorre-15 puhdistimen yhteyteen, pumppujen yhteyteen, sihtien yhteyteen, perålaatikon yhteyteen ja/tai viirakaivon yhteyteen voidaan sijoittaa useita, jopa useita kym-meniå, kuten 10 - 100 detektoria kemiallisten suureiden detektoimiseksi keksi:.:.o.\ mukaisesti. Edelleen vastaa-20 viin mekaanisiin laitteisiin, kuten pumppuihin, syotto-laitteisiin, putkistoihin, såilioihin ja muihin massaan mekaanisesti vaikuttaviin laitteisiin voidaan sijoittaa erilaisia fysikaalisia detektoreita, kuten ao. laittei-den toimintojen toimintatilaa ilmaisevia detektoreita.In the system according to the invention, the process of the wet section of the paper machine, e.g. place several, even several tens, such as 10 to 100 detectors for detecting chemical quantities according to the invention:.:. o. \. Furthermore, various physical detectors, such as detectors indicating the operating status of the functions of the devices in question, can be placed in the corresponding mechanical devices, such as pumps, intake devices, pipelines, silos and other devices which have a mechanical effect on the mass.
25 Detektoreilta signaalit johdetaan mahdollisen signaa-linkåsittelyn ja -vahvistuksen jålkeen esim. tavanomai-selle tietokoneelle, jossa prosessin seuranta tapahtuu. Tålloin laskentayksikostå voidaan seurata kutakin mi-tattua suuretta ja måårittåå halutut suureiden viivås-30 tetyt suhteet ja håirioiden siirto-ominaisuudet suureiden vålillå ja verrata suureita toisiinsa. Massalinjo-·* jen yhteydesså on edullista måårittåå esim. sakeus, virtaus, pH ja johtokyky; vastaavat suureet mååritetåån yleenså sekoituksen jålkeen. Sååtovaiheiden jålkeen on 35 yleenså sopivaa måårittåå pH ja johtokyky. Perålaatikon yhteydesså on yleenså sopivaa måårittåå ionipitoisuu-det, sakeus, pH ja johtokyky. Viirakaivon yhteydesså on li 5 92742 yleenså sopivaa måårittaa sakeus, pH ja johtokyky, mahdollisesti ionipitoisuudet.After the possible signal-link processing and amplification, the signals are routed from the detectors to, for example, a conventional computer, where the process is monitored. In this case, it is possible to monitor each measured quantity from the calculation unit and to determine the desired delayed ratios of the quantities and the transmission properties of the disturbances between the quantities and to compare the quantities with each other. In connection with pulp lines, it is advantageous to determine e.g. consistency, flow, pH and conductivity; the corresponding quantities are usually determined after mixing. After the addition steps, there are generally generally suitable pH and conductivity determinations. In connection with the headbox, ionic concentrations, consistency, pH and conductivity are generally suitable. In connection with a wire well, it is generally suitable to determine the consistency, pH and conductivity, possibly ion concentrations.
Uutta keksinnosså on erityisesti laaja-alainen paperikoneen mårån paån kemiallinen seuranta jatkuvasti 5 on-line seka erityisesti ionien ja pitoisuuksien online seuranta, jota ei ole aiemmin toteutettu paperikoneen markaosan yhteydessa. Lisaksi uutta keksinnosså on erilaisten signaalien viivastettyjen suhteiden ja suu-reiden vålillå liikkuvien håirioiden siirto-ominaisuuk-10 sien muodostus, jolla on merkitystå varsinkin håi-riolåhteiden ja mekanismien paikallistamisessa proses-sissa. Lisaksi uutta keksinnosså on kemiallisten detek-toreiden antamien signaalien jaksollisuuden vertailu ao. suureeseen vaikuttavien laitteiden jaksollisuuk-15 siin.What is new in the invention is in particular the extensive chemical monitoring of the amount of paper machine continuously on-line, as well as the online monitoring of ions and concentrations, which has not previously been carried out in connection with the brand part of the paper machine. In addition, what is new in the invention is the generation of transmission characteristics of interfering ratios between different signals and large disturbances, which is important especially in locating disturbance sources and mechanisms in the process. In addition, what is new in the invention is the comparison of the periodicity of the signals given by the chemical detectors with the periodicity of the devices acting on the quantity in question.
Kuvassa 1 on esitetty eras keksinnon mukainen menetelma ja laitteisto paperikoneen markaosan hairioi-ta aiheuttavien laitteiden ja/tai yksikkoprosessien paiKallistamiseKSx. rapeiiKoneeseen kuuluu tavanomainen 20 markaosa 31 peralaatikkoineen 32 ja kuivausosineen 33. Paperiprosessi ja sen osat on sinansa tunnettu eika ni i ta kuvata tarkemmin tåsså yhteydessa. Erityisesti keksinto kohdistuu paperikoneen markaosan hairioitå aiheuttavien laitteiden ja/tai yksikkoprosessien pai-25 kallistamiseen. Kuvassa 1 esitetyssa prosessissa mår-*' kaosaan syotetaan kemiallista sellua A, mekaanista hierretta B ja hylkymassaa C vastaavista sailioista. Sekoituksen 34 jalkeen massa johdetaan konesailioon 35 ja edelleen sekoitukseen 36; tamån jalkeen pyorrepuh-30 distimille 37, pumpulle 38, sihdeille 39 ja peralaatik-koon 32. PerMlaatikosta massa johdetaan viiraosaan 31, ·· taålla muodostettu raina johdetaan konventionaaliseen tapaan kuivausosaan 33 ja tuotteeksi, esim. rullatta-vaksi 40.Figure 1 shows a method and apparatus according to the invention for locating devices and / or unit processes that cause disturbance to the brand part of a paper machine. The rapier machine includes a conventional 20 brand portion 31 with headboxes 32 and drying portions 33. The paper process and its components are known per se and will not be described in more detail in this context. In particular, the invention is directed to locating devices and / or unit processes that cause a disturbance in the brand portion of a paper machine. In the process shown in Figure 1, chemical pulp A, mechanical pulp B and scrap pulp C are fed to the wet chaos. After mixing 34, the pulp is fed to a machine sieve 35 and further to mixing 36; then to the circular cleaners 37, the pump 38, the screens 39 and the headbox size 32. From the box, the pulp is fed to the wire section 31, the web thus formed is fed in a conventional manner to the drying section 33 and to a product, e.g. roll 40.
35 Viiran lapi mennyt massa johdetaan viira- kaivoon 20 palautettavaksi sekoituksen 36 kautta mas-sansydttdlinjaan.The pulp passed through the wire is fed to the wire well 20 to be returned via the mixture 36 to the pulp ignition line.
« 6 92742 ί«6 92742 ί
Esitetyssa periaatteellisessa prosessissa kemikaalilisays voidaan toteuttaa esim. sekoitussai-liossa 34. Edelleen kemikaaleja voidaan sekoittaa esim. konesailioon 35. Lisaksi kuvan prosessissa on tuotu 5 kemikaaleja pumpulle 38 ja tåyteaineita såilioon 41 sekoitettavaksi massalinjaan sekoitussåiliosså 21.In the principal process shown, chemical addition can be carried out e.g. in a mixing tank 34. Furthermore, chemicals can be mixed in e.g. a machine silo 35. In addition, 5 chemicals have been introduced into the pump 38 and fillers in the tank 41 to be mixed into the pulp line in the mixing tank 21.
Kuvan 1 prosessissa kemiallisen massan såi-liossa 45/ mekaanisen massan såiliossa 46 ja hylkymas-san såiliossa 47 maaritetaan massojen sakeus, pH, joh-10 tokyky seka syottovirtaus vastaavilla detektoreilla 1, 2, 3 ja 32. Detektoidut mittaustulokset D johdetaan signaalinkåsittely-yksikkoon S ja edelleen laskentayksikkoon 30, so tietokoneeseen. Myos konesailiosta 35 maaritetaan sakeus, pH, johtokyky ja virtaus seka li-15 saksi kemikaali 2, esim. rauta vastaavilla detektoreilla; signaalit mudostetaan ja johdetaan laskentayksikkoon 30 samaan tapaan kuin edella. Vastaavasti perå-laatikosta 32 ja viirakaivosta 20 maaritetaan TA-sa-keus, kokonaissaKeus, pH ja johLokyky vasLaaviila de-20 tektoreilla l1, l2, 2 ja 3; signaalien muodostus ja siirto laskentayksikkoon 30 samoin kuin edella. Edelleen sekoitussåiliostå 34 maaritetaan kemikaali 1, esim. magnesium, pumpulta 38 kemikaali 3, jokin muu haluttu kemikaali ja tayteainesåiliostå 41 haluttu 25 tåyteaine vastaavilla detektoreilla kuvan mukaisesti; “ signaalin muodostus ja siirto laskentayksikkodn samoin kuin edella. Edelleen peralaatikosta 32 maåritetaån ainakin Ca-, Al- ja silikaatti-ionipitoisuudet vastaavilla detektoreilla 4, 5 ja 6; signaalien muodostus ja 30 siirto laskentayksikkoon 30 kuin edella. Esitetyssa sovellutuksessa perålaatikossa maaritetaan myos TOC, so orgaanisen hiilen kokonaismåårå vastaavalla detektoril-la 19.In the process of Figure 1, in the chemical pulp tank 45 / mechanical pulp tank 46 and the waste pulp tank 47, the consistency, pH, conductivity and input flow of the pulps are determined with respective detectors 1, 2, 3 and 32. The detected measurement results D are passed to the signal processing unit S and further to the computing unit 30, i.e. the computer. The consistency, pH, conductivity and flow as well as the li-15 Saxon chemical 2, e.g. iron with similar detectors, are also determined from the machine sieve 35; the signals are formed and passed to the calculation unit 30 in the same manner as above. Respectively, the TA thickness, total thickness, pH and conductivity are determined from the tail box 32 and the wire well 20 with the corresponding de-20 tectors l1, l2, 2 and 3; signal generation and transmission to the calculation unit 30 as above. Further, a chemical 1, e.g. magnesium, a chemical 3 from the pump 38, another desired chemical from the pump 38 and the desired filler from the filler tank 41 are determined from the mixing tank 34 with corresponding detectors as shown; “Signal generation and transmission to the calculation unit as above. Further, at least the Ca, Al and silicate ion concentrations are determined from the peralbox 32 with the respective detectors 4, 5 and 6; signal generation and transfer to the calculation unit 30 as above. In the application shown, the TOC, i.e. the total amount of organic carbon in the headbox, is also determined with a corresponding detector 19.
Edelleen esitetyssa sovellutuksessa detektoi-35 daan jatkuvasti on-line edella mainittuihin, detektoi-tuihin suureisiin edellisessa prosessivaiheessa vaikut-tavien laitteiden ja/tai yksikkoprosessien jaksolli- «In the further embodiment shown, the periodicity of the devices and / or unit processes affecting the above-mentioned detected quantities in the previous process step is continuously detected on-line.
IIII
i 7 92742 suuksia, esim. virtaus hierresåilostå 46, virtaus sel-lusåili6stå 45, virtaus hylkysåiliostå 47, virtaus tai painevaihtelu sekoitussåiliostå 34, virtaus ja/tai painevaihtelu konesailiossa 35, virtaus ja/tai paine-5 vaihtelut pyorrepuhdistajilta 37 ja 371, kemikaali 3, virataus ja/tai painevaihtelu pumpulta 38, virtaus ja/tai painevaihtelu sihdellå 39; signaalin muodostus ja siirto laskentayksikkoon samoin kuin edellå. Edel-leen menetelmåsså voidaan seurata erillisilla detekto-10 reilla D esim. kaikkien tai haluttujen pumppujen, se-koittimien, ja muiden kone-elimien ja/tai yksikko-prosessin toimintaa; signaalien muodostus ja johto laskentayksikkoon 30 kuten edellå.7 92742, e.g. flow from pulp tank 46, flow from pulp tank 45, flow from waste tank 47, flow or pressure variation from mixing tank 34, flow and / or pressure variation in machine silo 35, flow and / or pressure fluctuations from rotary cleaners 37, 37 and 37 , flow and / or pressure variation from pump 38, flow and / or pressure variation from screen 39; signal generation and transmission to the calculation unit as above. Furthermore, in the method, the operation of all or the desired pumps, mixers, and other machine elements and / or the unit process can be monitored by separate detectors D, e.g. signal generation and wiring to the calculation unit 30 as above.
Laskentayksikossa 30 muodostettujen haluttujen 15 suureiden, laitteiden ja/tai yksikkoprosessien jaksol-lisuutta kuvaavat signaalit. Edelleen laskentayksikossa mååritetåan signaalien normaalitasot, normaalikarakte-ristikat ja/tai singaalien våliset siirtokarakteristi-Kat jd .uiidrai-åan normaai is ta poikkeavat signaalit seka 20 verrataan niita detektoituihin, edellisen prosessivai-heen laitteiden ja/tai yksikkoprosessien jaksollisuuk-siin ao suureen håirion aiheuttajan paikallistamiseksi. Erityisesti keksinnossa seurataan massavirtauksien sakeutta, pH:a ja johtokykya seka Ca-, Al- ja silikaat-25 ti-ionipitoisuuksia. Johdettavat prosessilaitteet ja/tai yksikkoprosessit voidaan valita halutun tarpeen, so tutkimuskohteen mukaisesti, esim. ensisijaisesti seurataan hairioalttiimpia laitteita ja/tai yksikko-prosesseja.Signals describing the periodicity of the desired quantities, devices and / or unit processes generated in the calculation unit 30. Furthermore, the calculation unit determines the normal levels of the signals, the normal characteristic cross-sections and / or the signals deviating from the normal and the normal transmission characteristics between the signals and compares them with the detected, periodically determined devices and / or units of the previous process step. . In particular, the invention monitors the consistency, pH and conductivity of mass flows as well as Ca, Al and silicate-ti ion ions. The process equipment and / or unit processes to be controlled can be selected according to the desired need, i.e. the research object, e.g. more equipment and / or unit processes that are more susceptible to disturbance are primarily monitored.
30 Suoritusesimerkki kuvaa erasta keksinnon mu- kaista sovellutusta esimerkinomaisesti rajoittamatta keksinnon sovellutusta millaån tavoin. Taten keksinnon mukaisessa menetelmåsså ja laitteistossa voidaan seurata minkå tahansa kemikaalin tai ionin pitoisuutta pro-35 sessissa, vastaavassa menetelmåsså voidaan seurata minkå tahansa yksittåisen laitteen tai kone-elimen tai yksikkoprosessin mitå tahansa toimintaa, esim. paine- 8 92742 vaihtelua, kierroslukua, erityisia varahtelyja tms.An exemplary embodiment illustrates an embodiment of the invention by way of example without limiting the application of the invention in any way. In the method and apparatus of the invention, the concentration of any chemical or ion in the process can be monitored, in the corresponding method any operation of any individual device or machine member or unit process can be monitored, e.g., pressure, speed, special variations, etc. .
Keksinnon sovellutukset voivat vaihdella o-heisten patenttivaatimuksien puitteissa.Applications of the invention may vary within the scope of the appended claims.
IIII
Claims (8)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI911685A FI92742C (en) | 1991-04-08 | 1991-04-08 | Diagnosis of paper machine wet chemistry disorders |
| PCT/FI1992/000103 WO1992017642A1 (en) | 1991-04-08 | 1992-04-03 | Diagnosing disturbances in the wet part chemistry of a paper machine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI911685A FI92742C (en) | 1991-04-08 | 1991-04-08 | Diagnosis of paper machine wet chemistry disorders |
| FI911685 | 1991-04-08 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI911685A0 FI911685A0 (en) | 1991-04-08 |
| FI911685A FI911685A (en) | 1992-10-09 |
| FI92742B FI92742B (en) | 1994-09-15 |
| FI92742C true FI92742C (en) | 1994-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI911685A FI92742C (en) | 1991-04-08 | 1991-04-08 | Diagnosis of paper machine wet chemistry disorders |
Country Status (2)
| Country | Link |
|---|---|
| FI (1) | FI92742C (en) |
| WO (1) | WO1992017642A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE503644C2 (en) * | 1994-10-14 | 1996-07-22 | Eka Chemicals Ab | Ways to determine the content of organic material in effluents from pulp and paper mills |
| DE19653477C2 (en) * | 1996-12-20 | 1999-04-22 | Siemens Ag | Process and device for process control in the manufacture of paper |
| AT405061B (en) * | 1997-07-01 | 1999-05-25 | Andritz Patentverwaltung | METHOD FOR MINIMIZING THE USE OF WATER IN A WATER CIRCUIT OF A PAPER / PULP OR FUEL FACTORY |
| FI104502B (en) * | 1997-09-16 | 2000-02-15 | Metsae Serla Oyj | A method of making a paper web |
| DE19946787A1 (en) | 1999-09-29 | 2001-04-05 | Focke & Co | Method and device for diagnosing machines |
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| US4752356A (en) * | 1985-10-18 | 1988-06-21 | Miami University | Papermaking process |
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1992
- 1992-04-03 WO PCT/FI1992/000103 patent/WO1992017642A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| FI92742B (en) | 1994-09-15 |
| FI911685A (en) | 1992-10-09 |
| WO1992017642A1 (en) | 1992-10-15 |
| FI911685A0 (en) | 1991-04-08 |
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