Brown Stock Washing Fundamentals: Enhancing Drainage through Chemistry, Part 1

摘要

The drainage of filtrates during the mat formation in a brown stock washer directly impacts the washer's productivity and indirectly affects its efficiency. In this paper, we demonstrate the role of entrained air on mat formation and filtration as they occur in brown stock washing. We further show how chemical treatments, such as defoamers and wash aids, and fiber surface chemistry influence air entrainment and thereby washer productivity and efficiency. With this knowledge, washer operations can be improved through the design and selection of better treatments.