Filter Element Elevated Retention Edges Minimize Particle Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Filter discs with passages between filter elements allow particle transfer, leading to inefficient particle separation and degradation, which complicates cleaning and increases backflow, necessitating a solution to minimize particle transfer without reducing liquid flow.
Innovation Solution
Incorporating elevated retention edges in the passages of filter elements to direct particles towards the rotor shaft, maintaining the passage area for liquid flow while preventing particle transfer between elements, and using retrofittable inserts made of mesh or net materials to enhance particle retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If passages are provided in edge structures for liquid communication between filter elements, then liquid flow between filter elements is enabled, but particles are transferred between filter elements leading to inefficient separation and degradation
Solution Approach 1:
The edge structure is designed with different local properties: the passage area maintains open geometry for liquid flow, while elevated retention edges are added at specific locations to create particle retention zones. This local differentiation allows the same structure to serve dual functions of liquid communication and particle prevention.
Solution Approach 2:
The elevated retention edges act as intermediary structures between the passage and the particle transport path. These edges serve as a mediating element that allows liquid to pass through while intercepting and redirecting particles away from the passage, preventing particle transfer between filter elements.
2Productivity
If passage size is reduced to prevent particle transfer, then particle separation efficiency improves, but backflow from filter elements to rotary shaft increases
Solution Approach 1:
The passage structure is segmented into functional zones: the main passage body maintains adequate cross-section for liquid flow, while elevated retention edges create separate particle interaction zones. This segmentation allows independent optimization of liquid flow and particle retention functions.
Solution Approach 2:
Instead of reducing passage cross-sectional area (2D reduction), the solution adds elevation in the vertical dimension to create retention edges. This dimensional addition provides particle retention capability without compromising the horizontal passage area needed for liquid flow.
3Productivity
If passages are provided for liquid communication, then filtration capacity increases, but particles are torn into smaller parts making cleaning more difficult
Solution Approach 1:
The elevated retention edges perform preliminary action by intercepting particles before they can enter the passage and be transported to adjacent filter elements. This preliminary interception prevents the harmful effect of particle degradation and subsequent cleaning difficulties.
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
The elevated retention edges effectively reduce particle transfer between filter elements, maintaining particle size and improving filtration efficiency by directing particles into the sludge collector, while allowing unimpeded liquid flow.
Implementation Method 1
During rotation, when emerging out of the water, each filter elements could be cleaned by a water jet spraying the filter cloth. Particles cleaned from the filter cloth fall into the rotary shaft and onto a sludge collector
Implementation Method 2
The filtering takes place from the inside of the filter element and out though a filter cloth. Particles in the liquid are separated on the inside of the filter cloth.
Implementation Method 3
During rotation, when emerging out of the water, each filter elements could be cleaned by a water jet spraying the filter cloth.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A filter element (2) for use in a filter disc (25), wherein a plurality of filter elements (2) are arranged on a rotor shaft (3) in a manner allowing liquid communication between the inside (4) of the filter elements (2) and the inside (5) of the rotor shaft (3). The filter element (2) has at least one passage (21) in an edge structure (22) for liquid communication between the inside (4) of adjacent filter elements (2) when the filter elements (2) are assembled forming a filter disc (25). The passage (21) has an elevated retention edge (30) extending along at least one edge of the passage (21). Transportation of particles between filter elements in a disc filter is thereby minimized.