Pleated Filter Element Structure for Higher Dust Loading
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Solution Overview
Problem
The life of filter elements is limited by the accumulation of dust and particulates on the filter media, which increases resistance to fluid flow, indicated by differential pressure, leading to premature end-of-life conditions.
Innovation Solution
A filter element design with a corrugated downstream layer and a non-corrugated upstream layer of fibers, featuring a void space between the layers, where the upstream layer has low solidity and specific fiber characteristics, enhances dust loading capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter media density is increased to improve filtration efficiency, then the capture efficiency improves, but the dust loading capacity decreases and differential pressure increases
Solution Approach 1:
The filter media is divided into multiple layers with different functions: a first layer with higher density for efficient particle capture and a second layer with lower density for dust loading capacity. This segmentation allows each layer to optimize for its specific function, resolving the contradiction between filtration efficiency and dust loading capacity.
Solution Approach 2:
Different regions of the filter media have different densities and properties. The first layer has higher density for efficient capture, while the second layer has lower density for higher dust loading capacity. This local differentiation allows the filter to simultaneously achieve both high filtration efficiency and high dust loading capacity.
2Reliability
If the filter media density is increased to improve capture efficiency, then the filtration performance improves, but the differential pressure increases
Solution Approach 1:
The filter media is segmented into two layers with different density characteristics. The first layer provides efficient capture with higher density, while the second layer reduces differential pressure with lower density. This segmentation resolves the contradiction between capture efficiency and differential pressure.
Solution Approach 2:
The filter media has local quality variations where the first layer has higher density for capture efficiency and the second layer has lower density for reduced differential pressure. This local differentiation allows the system to achieve both high capture efficiency and low differential pressure simultaneously.
3Reliability
If the filter media is made more dense to improve filtration, then the capture efficiency improves, but the service life decreases
Solution Approach 1:
The filter media is divided into two functional layers: the first layer with higher density for filtration performance and the second layer with lower density for extended service life. This segmentation allows the filter to maintain both high filtration performance and extended service life by distributing the loading across layers with different capacities.
Solution Approach 2:
Different portions of the filter media have different densities optimized for different functions. The first layer has higher density for filtration, while the second layer has lower density for extended service life. This local quality variation resolves the contradiction between filtration performance and service life.
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 improved dust loading extends the useful life of the filter element by reducing resistance to fluid flow and maintaining efficiency over time.
Implementation Method 1
a void space is defined between the downstream layer of filter material and the upstream layer of fibers
Implementation Method 2
The downstream layer of filter material is in a corrugated configuration defining peaks and valleys
Data Source
AI summary
Embodiments disclosed herein relate to a pleated filter element having filter media having a downstream layer of filter material and an upstream layer of fibers. A spacing structure defines a void space between the upstream layer of fibers and the downstream layer of filter material.