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A pulp manufacturing plant producing kraft, sulphite/sulfite, or dissolving pulp experiences severe corrosion in its continuous or batch digesters, with deep pitting up to 5 mm. This extensive corrosion necessitates either replacing shell sections or the complete pulp digester alternativly upgrading it with a long-term corrosion protection solution.
Extensive corrosion and degradation of the digester shell require time consuming removal of the damaged material (corrosion).
Uddcomb applied THE UDDCOMB METHOD® to upgrade the corroded digester shells with mechanized weld overlay technolgy. Prior to weld overlay Uddcomb effectively removed the damaged material with grinding robots which is 10 times fmore efficient than manual grinding and provides a higher quality of the surface.
The application of THE UDDCOMB METHOD® provided the pulp manufacturing plant with a cost-effective alternative to complete replacement. The upgraded digester shells now have improved corrosion resistance, reducing maintenance needs and extending operational life, ultimately supporting the plant's productivity and cost reductions.