Hydrocyclone Cleaner Feed Consistency Optimization
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Solution Overview
Problem
Conventional reverse centrifugal cleaning plants suffer from low separation efficiency in the second stage due to low feed consistency, which affects the removal of impurities lighter than fiber and water, such as wax, as the separation efficiency is highly dependent on the consistency of the suspension fed to the hydrocyclone cleaner.
Innovation Solution
Increasing the feed consistency of one or more latter stages by adding a portion of recycled fibers or auxiliary pulp suspension to the feed suspension, thereby enhancing the separation efficiency of impurities in the hydrocyclone cleaners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If low consistency feed pulp is used in hydrocyclone cleaner, then separation of heavy particles from fibers is possible, but separation efficiency of impurities lighter than fiber and water is low
Solution Approach 1:
The patent applies parameter changes by adjusting the feed consistency to an optimal range of 0.3-1.5% through controlled dilution with process water. This parameter optimization enables the hydrocyclone cleaner to achieve high separation efficiency for both heavy particles and light impurities (wax, resin) by ensuring proper particle mobility in the vortex chamber while maintaining effective centrifugal separation
2Manufacturing precision
If feed consistency is increased to improve separation efficiency, then impurities lighter than fiber and water are separated better, but fiber network binds small impurities preventing separation
Solution Approach 1:
The patent resolves this contradiction by precisely controlling the feed consistency parameter within the optimal range of 0.3-1.5%. This parameter change prevents the fiber network from becoming too dense to allow impurity separation, while simultaneously ensuring enough fiber presence to maintain proper vortex formation and centrifugal separation forces in the hydrocyclone chamber
3Manufacturing precision
If conventional process with low feed consistency is used, then hydrocyclone cleaner operates, but separation efficiency for light impurities remains low
Solution Approach 1:
The patent improves cleaning performance by changing the feed consistency parameter to the optimal range of 0.3-1.5% through controlled dilution. This parameter change enables the hydrocyclone cleaner to effectively separate light impurities (wax, resin) that were previously poorly removed, thereby significantly enhancing overall cleaning efficiency and productivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly increases the separation efficiency of impurities lighter than fiber and water by adjusting the consistency of the feed suspension to the latter stages, improving the overall performance of the centrifugal cleaning process.
Implementation Method 1
the separation of particles from fibers takes place under the influence of a centrifugal acceleration field resulting from the rotating motion
Implementation Method 2
pressure energy in the pulp is converted to a rotating motion in the chamber
Data Source
AI summary
A method of dividing a suspension, especially a fiber suspension into an accept fraction and a fraction containing impurity particles in a centrifugal cleaning plant having at least two stages. The suspension is fed to a preceding stage, wherefrom a heavier fraction of the suspension is taken as accept fraction and a lighter fraction is taken as fraction containing impurity particles. The lighter fraction containing impurity particles is fed into a latter stage of the centrifugal cleaning plant. Before being fed to the latter stage, the feed consistency of the lighter fraction is increased.