Filter Media Surface Treatment for Water Separation
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Solution Overview
Problem
Current filter media configurations for hydrocarbon fluids, such as diesel fuels, are inadequate in effectively removing free water, which can cause engine damage through cavitation and corrosion, and do not efficiently separate water from hydrocarbon streams.
Innovation Solution
The development of a filter media with a substrate layer having a treated surface that increases the roll-off angle and contact angle for water droplets, featuring flutes and potentially UV-treated surfaces, hydrophilic group-containing polymers, and specific porosity, enhancing water coalescence and separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filter media is used for hydrocarbon fluid filtration, then basic particle removal is achieved, but free water removal efficiency is insufficient
Solution Approach 1:
The filter media employs a porous substrate layer with controlled pore structure that enables capillary action and surface tension effects to coalesce water droplets from hydrocarbon fluids. The porous structure provides high surface area for water-hydrocarbon separation while maintaining fluid flow productivity.
Solution Approach 2:
The filter media uses composite material construction combining hydrophobic substrate materials with hydrophilic surface treatments. This composite approach creates differential surface properties that enhance water coalescence and separation efficiency while maintaining overall filtration performance.
2Reliability
If the substrate surface is treated to increase roll-off angle for water droplets, then water separation efficiency improves, but surface treatment complexity increases
Solution Approach 1:
The surface treatment modifies physical parameters of the substrate surface including contact angle and roll-off angle through chemical or physical treatments. These parameter changes enhance water droplet separation by creating hydrophobic surfaces that promote droplet coalescence and rolling off.
Solution Approach 2:
The patent replaces complex mechanical separation structures with surface chemistry-based separation mechanisms. By treating the substrate surface to create hydrophobic properties, the system achieves water separation through surface tension and contact angle effects rather than mechanical means.
3Reliability
If flutes are added to the substrate layer to enhance water coalescence, then water removal performance improves, but manufacturing complexity increases
Solution Approach 1:
The flutes create curved surfaces on the substrate that promote water droplet coalescence through surface geometry. The curved flute structures guide water droplets along their surfaces, enhancing coalescence efficiency while adding minimal manufacturing complexity compared to flat substrates.
Solution Approach 2:
The substrate is segmented into multiple flute structures that create separate channels and surfaces for water coalescence. This segmentation increases the effective surface area for water-hydrocarbon separation while maintaining manufacturability through standard forming processes.
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 filter media effectively removes water from hydrocarbon fluids, preventing engine damage and improving filtration efficiency by retaining a high roll-off angle and contact angle, allowing for better water droplet coalescence and separation.
Implementation Method 1
the first surface has a UV-treated surface
Implementation Method 2
the first surface has a hydrophilic group-containing polymer
Implementation Method 3
the first surface has a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the first surface is immersed in toluene
Data Source
AI summary
The current technology relates to filter media configurations where the filter media has a surface with a treatment that increases the roll off angle of the surface for a 50 μL water droplet when the surface is immersed in toluene. Some example filter media have a fluted configuration, and some example filter media have multiple layers. Filter media having multiple layers can be single facer media, for example, where one layer is planar and another layer is fluted.