Stock Prep and Approach Flow Considerations for Increased Production, TAPPICon24

Paper companies optimizing their assets to improve profit will often focus on increasing production rate of the paper machine. This may be accomplished by various operational means or by capital projects on the machine to improve drainage, press solids, or drying. In some cases, there is an attempt to make a relatively large step change increase in capacity on machines that are already operating higher capacities than they or their auxiliary equipment were originally designed for. Often the stock prep and approach flow systems will also become bottlenecks for increasing production.

This paper presents an outline for evaluating the stock prep and approach flow systems for production increases on paper machines. Steps include performance of mass and energy balances and subsequent capacity evaluations of storage chest retention, agitation, pumps, pipelines, refining, screening, and cleaning. The use of guidelines and tools available to the industry will be discussed. Reduction in water and energy requirements are discussed since these are very achievable byproducts of production increase projects and stock prep rebuilds.

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