May 4, 2021
Most operating PMs have opportunities for cost savings via improvements in treatment and use of the excess white water from the forming and press sections. Two main opportunities are: energy savings by increased use of hot filtered water to replace fresh water for showers, and fiber savings from improved fiber recovery by the PM saveall to reduce sewer losses.
A webinar on Wednesday, May 12th, 2021 explained white water management and improvement possibilities. This webinar is also useful for mill personnel who work in another area of the mill and are unfamiliar with the white water process and water management, but wish to learn about them. The webinar is available for viewing HERE.
During the webinar, Jack Milliken, Valmet Product Manager, explained:
Here is an example of what you will learn about savealls...
Savings include:
Adequate and uniform consistency of recovered stock and broke returned to mixing tank means fewer wet end breaks, and faster recovery from breaks.
Consistent quality filtrate used for shower water means means reduced plugging of showers, improved saveall efficiency and less maintenance. Use clear filtrates for PM showers to save energy and water.
Capacity should be adequate for excess PM white water and in some cases support broke thickening. Filtrate quality should be at benchmark ppm's or less. Recovered stock % consistency should be adequate (e.g. 4%) to support blend chest consistency control target with trim dilution.
If you have any questions about optimizing your white water usage and developing a water management plan, watch the webinar and contact your Valmet representative.