Segmented Processing Plate Collision Points
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Solution Overview
Problem
Current mechanical processing technologies for lignocellulose-containing fibrous materials, such as dispersers and refiners, are limited in effectively breaking down contaminant particles and improving pulp quality due to a lack of sufficient collision points and cutting edges, which affects the efficiency of contaminant removal and pulp refinement.
Innovation Solution
The design of processing plates with inclined walls that are dislocated relative to each other in the circumferential direction increases the number of collision points and cutting edges, enhancing the dispersing and defibration processes by increasing the effectiveness of contaminant particle breakdown and pulp intermingle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional disperser plates with standard projecting parts are used, then the device structure is simple, but the number of collision points and cutting edges is insufficient, reducing contaminant removal efficiency
Solution Approach 1:
The projecting part is segmented into multiple functional surfaces: first inclined surface, second inclined surface, third inclined surface, and fourth inclined surface. Each surface creates additional collision points and cutting edges when the rotor and stator plates interact, thereby increasing contaminant removal efficiency without adding separate components
Solution Approach 2:
Different regions of the processing plate are given different local qualities through the specifically oriented inclined surfaces. The first and second inclined surfaces face opposite directions to handle material flow from different zones, creating localized optimization for contaminant breakdown at various radial positions
2Manufacturing precision
If the number of collision points is increased to improve contaminant breakdown, then the processing effectiveness increases, but the structural complexity of the processing plate increases
Solution Approach 1:
The projecting part is divided into multiple inclined surfaces (first, second, third, fourth) that collectively create numerous collision points and cutting edges. This segmentation allows high manufacturing precision for pulp quality improvement while maintaining a relatively simple overall structure by integrating multiple functions into one component
Solution Approach 2:
Multiple functional surfaces that would traditionally require separate components are merged into a single projecting part structure. The first, second, third and fourth inclined surfaces are combined in one integrated element, reducing device complexity while achieving the desired number of collision points for high pulp quality
3Productivity
If inclined walls are dislocated in the circumferential direction to increase collision points, then contaminant particle breakdown is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The inclined walls are segmented into four distinct surfaces with specific orientations. The first and second inclined surfaces face opposite directions, as do the third and fourth surfaces. This segmentation enables enhanced dispersing efficiency through increased collision points while maintaining manufacturability by using standard machining operations for each surface
Solution Approach 2:
The inclined surfaces are arranged asymmetrically in the circumferential direction with specific dislocations. The first and second inclined surfaces face opposite directions, creating an asymmetric pattern that maximizes collision points and cutting edges. This asymmetric arrangement enhances dispersing efficiency while remaining manufacturable through conventional asymmetric machining techniques
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 configuration improves the efficiency of contaminant removal and pulp refinement by increasing collision points and cutting edges, leading to better pulp quality and reduced contamination in paper or board products.
Implementation Method 1
the projecting parts and the cavities in the oppositely positioned stator/rotor are then arranged to intermesh with each other such that the projecting parts in the annular rows in the stator plate extend into the annular open areas in the opposite rotor plate and vice versa as male-female elements. When the disperser discs of the disperser are rotated relative to each other, the pyramidal shaped discrete projecting parts in the stator and rotor cause impacts to the pulp to be dispersed
Implementation Method 2
effects of these impacts together with effects of internal friction in the pulp detach the contaminant particles from the pulp and break them up into smaller pieces
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
A processing plate (4, 12) for a device (1) for mechanically processing lignocellulose containing fibrous material. The plate comprises inner and outer peripheries (22, 23) and a processing surface (9, 17) provided with projecting parts (6, 7, 14, 15). At least some of the projecting parts (7, 15) comprise a radially inner part (28) having an inclined ascending wall (29) towards the outer periphery (23) of the plate and a radially outer part (30) having an inclined descending wall (31) towards the outer periphery (23) of the plate (4, 12). The inner and outer parts (28, 30) are radially coupled to each other by a ridge (32) along a coupling line (CL). The walls (29, 31) are mutually connected only partly so that they have in common only a crest section (40) of the ridge (32) which crest section (40) is less than a width of at least one of the wall (29) of the inner part (28) and the wall (31) of the outer part (30) at the coupling line (CL).