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Karinen K.,ACA Systems Oy | Launonen U.,UJL Pty Ltd.
Appita Journal | Year: 2012

Dusting is a common problem in papermaking, printing and paper converting. Specifically in offset printing, linting has become a growing problem, when lower cost materials and higher printing speeds are being used. Today, papermakers try to use more filler pigments because the filler price can be only 20-40 % of the fibre price. Unfortunately, fillers are not bound to fibres and they also prevent bonding between fibres, resulting in reduced strength, dusting and linting. Most paper machines produce a two-sided filler distribution and two-sided fibre bonding. The side with less bonding normally has a higher dusting propensity, the same applies for the side with higher filler content. The wire section has the greatest effect on filler two-sidedness and the press section on bonding two-sidedness. It is clear that there can be quite rapidly-changing variations in filler content and its two-sidedness, as well as in fibre bonding and its two-sidedness. Particularly when using recycled fibres, there are wide variations and they can be rapid. Also, changes in the broke proportion and recycled stock from the saveall have an effect on dusting propensity. Traditionally, dusting propensity has been measured in the laboratory. The delay time from process change to the result of laboratory measurement is at least one hour, normally much more. In addition, the laboratory sample represents a very small part of the total paper production, while, for example, true linting in offset printing tests 100 % of the paper surface. Consequently, the laboratory testing is not a satisfactory measurement. Linting is a cumulative process and very short high linting periods can cause severe problems in printing. ACA Systems Oy has developed a new Dusting Propensity Analyser (DPA), which is used online on a paper machine. Results are available after some minutes, depending on the severity of the problem.


Launonen U.,UJL Pty Ltd. | Laari J.,Tapio Technologies Oy | Stenlund H.,Visilab Signal Technologies Oy
Appita Journal | Year: 2013

Stand alone paper test instruments for papermachine floors are useful and economical operator tools to monitor the paper making process and paper quality. Their installation and user costs are comparatively low and in many cases paper mills have trialled them either to be sure about the technology or for short term process studies. The latest technology - including fast digital processing hardware, has make it possible to do data processing inside the sensing heads - and then inside the papermachines. The data can be transferred via wireless or fixed wire connections. In permanent installations, we have found that fixed wire installations are much better and more reliable. Wireless connections have some limitations with distances and power supply capacities. The key benefits for wireless communications are operator safety issues - no hanging cables and low-costs and quick installations for trial purposes.


The cross direction (CD) moisture profile on a machine is often the product of poor pocket ventilation and a differential drying rate across the machine width. This paper looks at the physics of drying and optimising the performance of the dryer section using a combination of advanced pocket ventilation and energy efficient short wave infrared drying.


The cross direction (CD) moisture profile on a machine is often the product of poor pocket ventilation and a differential drying rate across the machine width. This paper looks at the physics of drying and optimising the performance of the dryer section using a combination of advanced pocket ventilation and energy efficient short wave infrared drying.


Launonen U.,UJL Pty Ltd. | Sundvall O.,PulpEye AB
Fibre Value Chain Conference and Expo 2014: Pulp and Paper Bioenergy Bioproducts | Year: 2014

Modern pulp analysers offer the following benefits: Quick and reliable test results. Easy to use interface. Easy to reach data. Low maintenance - few moving parts. Flexible and modular design. Helps reduce mill energy costs. Helps reduce web breaks. Provides better understanding of fibre properties and different fibre distribution.


Launonen U.,UJL Pty. Ltd. | Akerberg I.,Procemex Oy
Appita Annual Conference | Year: 2013

Above presentation shows some features and tools for modern machine vision systems used in paper, pulp and printing plants. Modern technology with high speed HD cameras and high speed capturing and analysing technology can and will be used in these plants more in the future, especially inside the machines where the conventional camera systems cannot work reliably. These systems will save operator time at the production plant in troubleshooting reasons for paper machine web breaks, disturbances and web defects. The latest and modern machine vision tools are helping paper mill operators and management to quickly address issues and problems related to paper web breaks, events or paper defects. They are also becoming useful for paper quality and sales personnel. Opportunities for using modern machine vision systems are increasing, as is the number of cameras actually being used. The payback time or ROI of these systems could be only a few months as the machine vision system can help improve saleable production. Modern vision technology will bring more new and exciting machine vision and product quality monitoring applications in coming years - especially as the technology is now ready and available for paper, pulp and printing plant operators. The vision systems will record, store, analyse, alarm and display the relevant information, allowing for easier and quicker decision-making for operators.


Launonen U.,UJL Pty Ltd. | Akenberg I.,Sales China
Fibre Value Chain Conference and Expo 2014: Pulp and Paper Bioenergy Bioproducts | Year: 2014

The above presentation shows some features and tools for modern portable machine vision systems used in paper, pulp and printing plants. Modern technology with high speed HD cameras and high speed capturing and analysing technology can and will be used in these plants more in the future, especially inside the machines where conventional camera systems cannot work reliably. These systems will save operator time at the production plant in troubleshooting reasons for paper machine web breaks, disturbances and web defects. The latest and modern machine vision tools are helping paper mill operators and management to quickly address issues and problems related to paper web breaks, events or paper defects. They are also becoming useful for paper quality and sales personnel. The payback time or ROI of these systems could be only a few months as the machine vision system can help improve saleable production. Modern portable vision technology will bring more new and exciting machine vision and product quality monitoring applications in the coming years - especially as the technology is now ready and available for paper, pulp and printing plant operators. These camera vision systems will record, store, analyse, alarm and display the relevant information, allowing for easier and quicker decision-making for operators.


Launonen U.,UJL Pty Ltd. | Akenberg I.,Sales China
Appita Journal | Year: 2014

Modern technology with high speed HD cameras and high speed capturing and analysing technology can and will be used in these plants more in the future, especially inside the machines where the conventional camera systems cannot work reliably. These systems will save operator time at the production plant in troubleshooting reasons for paper machine web breaks, disturbances and web defects. The latest and modern machine vision tools are helping paper mill operators and management to quickly address issues and problems related to paper web breaks, events or paper defects. Opportunities for using modern machine vision systems are increasing, as is the number of cameras actually being used. The payback time or ROI of these systems could be only a few months as the machine vision system can help improve saleable production. Modern vision technology will bring more new and exciting machine vision and product quality monitoring applications in coming years - especially as the technology is now ready and available for paper, pulp and printing plant operators. The vision systems will record, store, analyse, alarm and display the relevant information, allowing for easier and quicker decision-making for operators.


Launonen U.,UJL Pty Ltd.
Appita Annual Conference | Year: 2013

There are modern biomass moisture analysers available measuring moisture content reliably and accurately. These BAM and NIR analysers have modern measurement methods suitable for the most biomass production and testing requirements. They are suitable for field, transport, and quality testing and biomass production plants. The following criteria could be beneficial when choosing the analyser for biomass 1. Accuracy 2. Measurement speed and sample size 3. Reliability 4. Fairer trading with biomass manufacturers 5. Safe use and operation 6. Capital investment cost or trialling and renting? 7. Remote support and diagnostics 8. Reduced labour 9. Closed loop moisture control loop for material and energy savings A suitable model of a biomass moisture analyser could be proposed by the suppliers, who can also test biomass samples in their factory.


Mustonen M.,Conmark Systems Inc. | Laszlo J.,Conmark Systems Inc. | Launonen U.,UJL Pty Ltd.
Appita Annual Conference | Year: 2011

The 61 st Appita Annual Conference Papers in 2007 included our presentation on NIR (near infrared) based liquor analyzers in the pulping and recovery area, being manufactured in Auburn, Alabama. Currently close to 30 liquor analyzers are in use, most of them by the leading US P&P Manufacturers. The analyzer now has a proven track record as an accurate and useful operator tool. Because of the analyzer's proven reliability in the field, the author company proceeded to develop a number of new and unique Opti-series Control Systems to utilize these analyzers to their fullest value as money saving tools in the areas of controlling Dissolving Tanks, Causticizing, Lime Kiln, Continuous and Batch Digesters, Brown Stock Washing and Chlorine Dioxide manufacturing processes. This was done by utilizing some of the best Pulping Process Control experts and the very latest technology which combines the actual chemistry of these processes with software tools like MPC (Model Predictive Controller) and SPC (Statistical Process Controller). Mill studies indicate annual savings of anywhere from USD 250,000 to USD 2,500,000 per installed Analyzer and Control System depending mainly on the size of the mill as well as the process in question. In average, the first year ROI is estimated to be 355% or less than 15 weeks. This is based on a mill of 800,000 Stons/yr production, 56% pulp yield and 270 Stons/day kiln production. The chlorine dioxide application, however, is based on a 500,000 Stons/yr pulp production and a 80 Stons/day ClO 2 production.

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