Two-Stage Oxygen Delignification Design and Operation at Weyerhaeuser Canada Ltd. in Kamloops, British Columbia, 1999 Pulping Conference Proceedings

D. Patrick Sullivan & William J. Miller

Beloit Pulping

Joseph M. Genco & Donna A. Johnson

University of Maine

Gary Berndt

Weyerhaeuser Canada Ltd.

A two stage oxygen delignification system was installed in the “B” Mill of the Weyerhaeuser Canada at Kamloops, B.C., as part of a major modernization project. The “B” Mill modernization was carried out in a series steps, starting in 1994, that were consistent with the company goals of minimum impact manufacturing , while meeting or exceeding all environmental permits and regualtions. The two stage oxygen delignifcation system project was the last step in the modernization project, coming on line in November, 1997.

The oxygen delignification project goals included significant environmental improvements, a return on investment by bleaching chemical cost reduction and increased pulp production.

This paper outlines the goals of the oxygen delignification project. The system design and operation is also described. Typical operating data is compared to optimal performance data. Process data and its use in the development system control strategy is discussed.