Equipment

 

There is a lot of equipment in modern kraft pulp mills, making them complicated and expensive. But a comprehensive understanding of the design and appropriate operations of the unit processes can provide a strong knowledge base to apply in mills.

This is about the simplest flowsheet you can draw for a kraft mill. The boxes represent the operating departments, each of which usually comprises many unit operations. A flowsheet showing all the unit operations would require more than a hundred boxes. In the kraft pulping course, we devote considerable attention to digesters -- what goes into them (especially the chips), what happens inside them, and what comes out (especially the pulp) -- in the context of overall mill operations. We also cover bleach plants and pulp drying machines.

  

               Chip Handling               Digesters               Brownstock Washers

 

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