Refiner Blade Thickened Bar Section Wear Resistance
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Solution Overview
Problem
Refiners used in the pulping industry for refining lignocellulosic material face high energy consumption and blade wear, leading to costly operations and inefficient fiber quality production, with existing solutions failing to adequately address these issues.
Innovation Solution
A blade design for refiners featuring a thickened bar section between dams, which extends from the inner to the outer periphery, enhancing the blade's durability and energy efficiency while maintaining refining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade operates for extended periods to maintain productivity, then the blade undergoes wear and must be replaced, causing downtime and increased costs
Solution Approach 1:
The bar section between the dams is thickened locally while the rest of the blade structure remains unchanged. This localized reinforcement increases wear resistance at the critical bar section without significantly increasing overall blade weight or complexity, allowing the blade to operate longer before replacement is needed
2Reliability
If the blade is designed with thicker bars to increase durability, then the energy consumption increases due to higher mass, but the bar section is only thickened locally between dams
Solution Approach 1:
The bar width is increased only in the specific section between the dams where wear occurs most frequently, while the rest of the blade maintains its original dimensions. This localized thickening provides enhanced durability at the critical wear zone without significantly increasing the overall mass and energy consumption of the rotating blade
3Productivity
If the refiner processes lignocellulosic material at high intensity to improve refining efficiency, then the energy consumption becomes very high
Solution Approach 1:
The bar section width between dams is increased to modify the mechanical parameters of the refiner. This dimensional change affects the material flow characteristics and refining action, potentially improving refining efficiency while the localized nature of the change helps control the increase in energy consumption
Data Source
AI summary
A blade for a refiner for refining of lignocellulosic material includes a blade surface configured to face another blade of the refiner and having a refining portion comprising a plurality of bars and a plurality of dams, each dam extending between two adjacent bars of the plurality of bars. The plurality of dams comprises a first dam extending along a first dam axis, and a second dam extending along a second dam axis. The first dam axis is offset from the second dam axis in a direction along the first bar axis. A first bar comprises a bar section that extends between the first dam axis and the second dam axis. The bar section has a width in a width direction perpendicular to a first bar axis that is larger than a width in the width direction of a remainder of the first bar outside of the bar section.