Valmet to Deliver New Pulp Cooking System to Clearwater Paper's Lewiston Mill

Oct. 5, 2015 - Valmet said that it will deliver key technology to Clearwater Paper's Lewiston, Idaho, pulp and paper mill upgrade project. Valmet's delivery includes a CompactCooking G2 pulp cooking system, a new plant for generating polysulfide and a minor upgrade of existing bleach plant.

Construction of the upgrade project is planned to begin this month with completion expected in September 2017.

This delivery is part of Clearwater Paper's USD 160 million project to install a continuous pulp digester that will replace 12 batch digesters. Benefits from the project include significant reduction in air emissions, improved pulp quality, increased production and a more efficient utilization of wood chips.

"The efficient utilization of raw material is a vital part from a sustainability perspective. We decided to base our new cooking process on polysulfide to optimize yield. The concept and process included in the CompactCooking system from Valmet was a perfect match to our targets," says John Deuser, Project Manager in Lewiston.

In a written statement, Valmet noted, "The cooking plant is the first stage in a chemical pulping line where lignin is chemically separated from the fiber. CompactCooking G2 is Valmet's 2-vessel continuous cooking system mainly consisting of an impregnation system and a digester for cooking of chips."

About Clearwater Paper
Clearwater Paper manufactures quality consumer tissue, away-from-home tissue, parent roll tissue, bleached paperboard and pulp at manufacturing facilities across the nation. In addition, the company produces bleached paperboard used by quality-conscious printers and packaging converters.

Valmet Corporation is a leading global developer and supplier of services and technologies for the pulp, paper and energy industries. To learn more, please visit:

SOURCE: Valmet

See related story:
» Clearwater Paper Announces $160 Million Upgrade to Lewiston Mill (9/8/2015)