Approaches to Optimizing Press Felt Cleaning, PaperCon 2013

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Cleaning, conditioning and the prevention of soils accumulation in press felts is a vital aspect of press section operation.  Higher speed machines, including modern tissue machines, present limits on the types and amounts of chemicals needed to properly clean press fabrics.  As machines close up their water loops and the levels of additives increases, maintaining press felt performance has become more challenging.  This has necessitated looking at the mechanism of how felt cleaners operate at a more fundamental level.  The effects of cleaning chemicals in felts is modeled and simulated to determine the most effective application methodologies for specific machine conditions.  A variety of factors such as machine speed, press felt moisture, type and levels of background contaminants in the press felt and process water can have significant impacts on the cleaning effectiveness of a felt conditioning program.