Full Description

The use of instrumentation and other techniques for monitoring and troubleshooting paper machine press sections has gained wide acceptance. The need to produce at lower cost has emphasized the need to better understand and optimize pressing efficiency. The information that follows has been compiled with an objective of providing information to the paper industry on available instrumentation and procedures for monitoring wet press performance.Information on the importance of techniques for measurement of several pressing parameters is included. Table 1 at the conclusion of this TIP includes specific information on equipment suppliers. The address of the suppliers can be found in the TAPPI Annual Directory, and other sources. The parameters discussed include:1. Felt thickness2. Sheet or felt total mass3. Felt water content4. Sheet water content5. Degree of felt filling/openness (porosity/permeability)6. Running felt length7. Felt tension8. Tradeline distortion9. Felt and roll speeds10. Press vibration11. Press roll alignment12. Press roll crown13. Press roll temperature14. Felt and sheet temperature15. Felt dewatering flow rate16. Felt fiber shedding.17. Nip load and felt tension

Product Details

Published: 10/02/2002