Method for operating a refiner and refiner

By adjusting the rotational speed of grinding plates based on product quality, the method and refiner design address inefficiencies in existing technologies, achieving energy-efficient production of high-quality fibrous material.

EP4752275A1Pending Publication Date: 2026-06-03ANDRITZ AG
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
ANDRITZ AG
Filing Date
2024-11-29
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

State-of-the-art refiners for breaking down organic fibrous material are inefficient and have high energy consumption due to fixed rotational speeds regardless of product quality, leading to suboptimal energy usage.

Method used

A method and refiner design that adjusts the rotational speed of grinding plates based on product quality, using variable-speed motors and frequency converters, allowing for continuous or discontinuous adjustments to maintain desired product quality while reducing energy consumption.

Benefits of technology

Achieves efficient operation with reduced energy consumption by dynamically adjusting rotational speed according to product quality, ensuring high-quality output with lower energy input.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a method for operating a refiner (1), wherein grinding plates (2) are rotated relative to one another by means of a drive in order to comminute organic fibrous material located between the grinding plates (2) and / or to separate fibers, forming a product of fibrous material and / or separated fibers. To achieve a particularly efficient process, the invention provides that a quality of the product, in particular homogeneity, is detected and the relative rotational speed of the grinding plates (2) is changed depending on the quality. The invention further relates to a refiner (1) for fibrous organic fibrous material to obtain a product of fibrous material and / or separated fibers, wherein the refiner (1) comprises grinding plates (2) which are rotatable relative to one another by means of a drive.
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Citation Information

Patent Citations

  • Method of controlling the crushing characteristics of a refiner and a blade for the refiner.

    DE69107963T2

  • Low speed low intensity chip refining

    WO1999061696A1

  • Procedure and system for refining a fibrous material with improved energy efficency and pulp quality

    WO2011045090A1

  • Fiber treatment arrangement

    WO2018234167A1