Oct 19, 2021
Paper and board mills regularly look for ways to reduce energy costs. Low-consistency refining uses a significant amount of a mill's electricity consumption, especially refining in paper/board grades based on virgin fibers. As the industry leader in refining technology, services and expertise, Valmet works with mill teams every day to achieve specific goals and solve problems. A Valmet webinar offers insights into how mills can minimize energy consumption in low-consistency refining through equipment, automation and operations.
The webinar was presented by Chris Wise, Product Sales Manager for Refiners and Deflakers and Luis Gonzales, Senior Manager of Services for Stock Preparation on October 27th, 2021. Click HERE to view this webinar.
Viewers of this webinar can expect to:
Chris and Luis address customer questions including:
An excerpt of the webinar about keys for optimimal refining results is shown below...
In a traditional disk refiner, stock is fed through a single inlet into the ported rotor and distributed internally to either side of the rotor. The two main areas for optimization are parallel plate surfaces and equal plate gaps.
Parallelism is vital to ensure proper fiber formation, protect the refiner internal parts (gearing, bearings, packing) and ensure proper plate wear. It insures that the rotating assembly is perpendicular to the refining chamber, so when the rotor is installed, the plate mounting surfaces are parallel. If it is not parallel, it can impact the shaft's ability to float.
The door closure surface, known as the datum, is the most important surface on a refiner. It must be cleaned each and every time the refiner is opened.
A washed out adjusting mechanism (refiner door) will result in tram mis-alignment. The red lines in graphic illustrate the parallel refining zone.
This is a very common issue. A badly worn shaft sleeve will result in poor refining and shorter plate life.
Too much grease can create a hydraulic lock on the coupling. This will restrict the shaft and has the potential to create thrust on the motor.
Couplings should be inspected for wear annually.
If you would like to uncover energy savings opportunities with intelligent refining, watch this informative webinar and contact your Valmet representative.