ModDD – Process modeling and new technical solutions for increased production rate

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The aim of the project is to provide knowledge on how double disk refining can be more energy efficient. To increase the process efficiency it has been shown important to have a high production flow through the refiner and also apply large forces on the fiber material in the refiner gap. This to reduce hysteresis losses.

Today, the possibility to utilize high production rates in double disc (DD) refining is limited by the design of the refiner inlet but also by the various operational strategies that are used for the process. The research will be developed through modeling (primarily based on CFD coupled with DEM) and optimization of the refiner inlet, and by finding new technical solutions and process strategies.

Project partners: Miun, Valmet

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