Curved Filter Sector With Polygonal Base For Disk Filters
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Solution Overview
Problem
Existing disc filters face challenges in increasing separation performance and efficiency while reducing material usage, as heavier filter sectors lead to mechanical stress on the hollow shaft, and existing designs often hinder the removal of filter cakes due to divergent wave profiles.
Innovation Solution
The filter sector features arched structures with a polygonal base, preferably a hexagon, which increases surface area and strength, allowing for reduced material usage and improved cake detachment, with perforations optimizing permeation and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the surface area of the filter plate is increased to improve separation performance, then the efficiency of the disc filter is improved, but the mass of the filter sector increases, leading to greater mechanical loads on the hollow shaft
Solution Approach 1:
The filter plate is equipped with curved structures (arches, domes, vaults) that protrude into the interior space. These curved structures increase the surface area available for filtration without requiring a proportional increase in the overall filter plate mass, as the curvature allows for more surface area within a compact volume. The curved structures are supported by a polygonal base (preferably hexagonal) that provides structural strength.
Solution Approach 2:
The invention transitions from a flat filter plate surface to a three-dimensional structured surface by adding curved structures that protrude into the interior space. This dimensional change allows the filter plate to present a larger effective surface area for filtration to the suction force, thereby improving efficiency without necessarily increasing the radial or circumferential dimensions of the filter sector, which would add mass.
2Productivity
If the surface area of the filter plate is increased to improve separation performance, then the efficiency of the disc filter is improved, but the mechanical loads on the hollow shaft increase
Solution Approach 1:
The curved structures (arches, domes, vaults) protruding into the interior space increase the surface area for filtration while distributing the mechanical loads more evenly across the filter plate structure. The polygonal base provides structural support that maintains rigidity without requiring excessive material, thereby reducing the overall mass and mechanical loads on the hollow shaft compared to a flat design with equivalent surface area.
Solution Approach 2:
The curved structures are designed as thin-shell elements that provide high surface area to volume ratio. These thin structures increase the filtration surface area while minimizing the material usage and associated mechanical loads, as the shell structure derives its strength from its geometric configuration rather than material thickness.
3Productivity
If a wave profile is used to increase surface area, then the efficiency is improved, but the filter cake detachment becomes difficult due to divergent wave profiles
Solution Approach 1:
The curved structures (arches, domes, vaults) are designed with specific geometric characteristics that facilitate filter cake detachment. The curvature of these structures creates a more favorable surface geometry for cake removal compared to conventional wave profiles, allowing the filter cake to detach more easily while still providing increased surface area for filtration.
Solution Approach 2:
The invention employs asymmetric geometric designs in the curved structures and their arrangement on the filter plate. This asymmetry in the geometric configuration creates favorable conditions for filter cake detachment by avoiding the divergent wave profiles that cause operational difficulties, while still achieving the goal of increased surface area for improved efficiency.
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 design enhances separation performance and efficiency, reduces material usage, and facilitates easier filter cake removal by providing a quasi-isotropic surface that does not hinder the rolling direction, thus maintaining strength and rigidity.
Implementation Method 1
the filter sectors being able to be suctioned through the hollow shaft. As a result of the suction of the filter sectors, liquid is sucked from the suspension into the interior of the filter sector
Implementation Method 2
the filter plate comprises at least one curved structure with a polygonal base. A polygonal base is to be understood as an essentially flat geometric figure which is formed by a closed train of partial sections
Implementation Method 3
the filter plate comprises at least one curved structure with a polygonal base... with perforations optimizing permeation and retention
Data Source
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AI summary
The invention relates to a filter sector (1) for a filter disk (11) or a disk filter (10), comprising a perforated and structured filter plate (2), and the filter plate (2) can be subjected to suctioning. The invention is characterized in that the filter plate (2) has at least one curved structure (3) with a polygonal base (4). In this way, it is possible to improve the separation capacity or separation efficiency.