PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 4, Number 1, 2018
4. 1+1=3. Combination of Pressing and heating technologies enables increased dryness, production and product quality Bjorn Magnus – Sales Director Tissue Mills business unit (VALMET) The introduction of the flexible Advantage ViscoNip press has changed the view of what pressing can achieve in the tissue making process. Today pressing is not only a way to remove water from the web. By utilizing the flexibility built in the adjustable pressing element you can significantly reduce drying energy and improve bulk, softness and uniformity. The ViscoNip press has become standard in new installations but has also proven to be a good way to save energy and increase capacity by rebuilds of existing t issue machines. The Advantage ReDry™ web heater use exhaust heat from the Yankee hood to increase the pressing temperature, reduce water viscosity and improve press dryness. Results from recent rebuilds of the pressing section, have exceeded the expectations showing significant capacity increase and savings in drying energy as well as paper quality improvements. The key for the results comes from the synergy effect gained when combining the ViscoNip press and the ReDry web heater. The flexible press has a unique ability to adapt to the Yankee dryer shell and is boosted by the heating of the web which will increase post pressure consistency. Energy and production performances are controlled with the Valmet DNA DCS and monitored with the Energy Efficiency Monitoring and Historian applications. These features are fully integrated in the Valmet DNA platform with Industrial Internet advanced capabilities for data analysis, performance optimization and remote assistance. In this speech, we will explain the technology behind and bring examples of how the solution has been realized and what can be achieved. 5. Yankee Press Load Verification John Holton (BTG AMERICAS) There is normally a limit on the maximum linear load which can be applied to the Yankee dryer, around 90 kN/m. This is important because Yankee press load is a key element of the Yankee derate curve, which tells us how much internal steam pressure and how much linear press load the Yankee dryer is rated for. Beyond safety, the press load is important because the suction press roll is the most important dewatering point on a tissue machine. Operating at the highest uniform load allowable is important to energy cost and the reduction of greenhouse gases. Until recently, there were no efficient means of measuring press load, so tissue producers loaded the press to a calculated load curve, which might be 10, 20, or 30 years old without any idea of the actual load. Now, systems to directly measure the press load are being introduced to our industry. This is a significant safety enhancement and a technical advance. This paper will discuss a press load verification method which is both faster and more accurate than measurement systems currently being utilized, saving both machine downtime and improving the result. 6. Predict, avoid, improve: Oradoc solution for chatter marks Maurizio Tomei – Sales & Customer Service Manager (ORADOC) At the end of 2017 the OraTec FX-20S – the new release of Oradoc vibration monitoring system for creping process conditions and for detecting the presence of chatter marks potential risk – was installed on PM6 in Lucartgroup Spa, Diecimo plant. The updated version was released along with the Remote Monitoring Service, which started functioning in March 2018, after 2 months of setting-up. The system features 4 sensors, 3 of them installed on the creping position and 1 on the cleaning beam position of the 3-meters machine that produces tissue from recycled fibers at a maximum speed of approx. 1700m/min. After having made many adjustments due to the presence of chatter marks on
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