Using the Necessary Tools to Troubleshoot and Optimize Press Section and Machine Performance, 2001 Engineering / Finishing & Converting Conference Proceedings

L. Gentile--The objective of this paper is to show the importance of using proper tools in order to collect, evaluate and take the necessary actions to improve and optimize paper machine performance in order to produce quality paper at low cost. It has been proven that one cannot rely on the on-line dry end scanners alone, since the information obtained is too late in the process to make necessary changes. Since there are certain problems in the press section, such as moisture streaks, that the on-line sensors cannot measure, a study was performed on the wet end of a paper machine using dedicated tools to detect wet streaks. Adjusting headbox parameters and addressing press section problems achieved substantial cost savings.

This study focuses on the impact as well as the results from the adjustments performed on the paper machine. The study was performed at a mill experiencing severe wrinkles resulting in winder runnability issues thus affecting production. Wrinkles, which typically originate from uneven moisture profiles in the press section, can actually worsen with increased machine speed. A higher than normal frequency of web breaks, which may be caused by severe wrinkles or by improper pressing, was also a major concern. This paper will point out recommendations for further improvements to machine efficiency and additional economic benefits that can be achieved by proper utilization of these tools. _____________________________________________________________________________