Rethinking Best Practices, Felt Cleaning and Conditioning, PaperCon2017

Press felt contamination with materials such as calcium carbonate and organic deposits have been problematic for papermakers for years.  Press felts without an effective cleaning program can suffer in performance from decreased water handling capability and shortened felt life.  Chemical cleaning strategies have been used to deal with such deposits in the past.  However, an often overlooked component to both establishing and optimizing a chemical cleaning program is understanding how contaminants are removed and measuring that removal.  This paper explains how new testing and measurement methodologies can be used for determining contaminant removal in press filtrates at the weir during machine operation thus providing valuable data for establishing variables like proper chemistry, washing frequency, and duration.  The end result will be press felt cleaning programs which are both high performance and cost effective. 

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