Melamine Foam Filter Medium for Low Pressure Drop Filtration
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Solution Overview
Problem
Existing filter media, such as glass fiber-based filters, face challenges in efficiently separating dispersed fluid phases from gas phases due to high pressure loss, health hazards from fiber release, and high energy consumption, while also requiring complex disposal procedures.
Innovation Solution
A melamine-based foam filter medium with an active filter area of at least 0.3 m², offering low flow resistance, lightweight construction, and self-cleaning properties, which reduces pressure drop and energy consumption, and can be easily incinerated, eliminating fiber-related hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass fiber based filter media are employed to separate dispersed fluid from gas phase, then filtration function is achieved, but pressure loss increases significantly
Solution Approach 1:
The patent employs melamine foam, a porous material with open-cell structure, as the filter medium. This porous structure allows gas to pass through while capturing dispersed fluid particles, achieving filtration function with lower resistance compared to traditional glass fiber media. The foam's inherent porosity and interconnected cells provide efficient flow paths that reduce pressure loss.
Solution Approach 2:
The patent uses melamine foam as a composite material that combines the benefits of foam structure (low density, high porosity) with fire-resistant properties. This composite approach replaces traditional glass fiber composites, achieving both filtration effectiveness and reduced pressure loss while adding thermal insulation capabilities.
2Reliability
If glass fiber based filter media are employed, then filtration is achieved, but health hazards arise from fiber release
Solution Approach 1:
The patent extracts the harmful fiber component from the filter medium by replacing glass fiber with melamine foam. This substitution removes the source of fiber release while maintaining the filtration function through the foam's porous structure, thereby eliminating health hazards associated with fiber exposure.
Solution Approach 2:
The patent changes the material parameter from fibrous structure to foam structure. This fundamental parameter change in the filter medium's physical form eliminates fiber release while preserving filtration capability through the foam's cellular architecture that captures particles without releasing harmful substances.
3Reliability
If glass fiber based filter media are employed, then filtration is achieved, but energy consumption increases due to high pressure loss
Solution Approach 1:
The melamine foam's porous structure provides low-resistance flow paths for gas passage. The interconnected open cells allow efficient fluid dynamics with minimal pressure drop, significantly reducing the energy required to move gas through the filter compared to dense glass fiber media.
Solution Approach 2:
By changing the material parameter from glass fiber to melamine foam, the patent achieves lower flow resistance and reduced pressure drop. This parameter change directly translates to lower energy consumption for gas movement while maintaining filtration effectiveness.
4Reliability
If glass fiber based filter media are employed, then filtration is achieved, but disposal complexity increases
Solution Approach 1:
The patent applies local quality by using a single-material construction (melamine foam) throughout the filter medium, as opposed to composite structures requiring separation. This homogeneous composition simplifies disposal by eliminating the need for complex separation procedures, allowing the entire filter to be treated as one material type for incineration or recycling.
Solution Approach 2:
The melamine foam filter medium is designed as a disposable component that can be easily incinerated. This approach replaces complex disposal procedures for reusable glass fiber filters with a simple burn-off process, reducing disposal complexity despite the shorter 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 melamine-based foam filter medium achieves efficient particulate filtration with reduced pressure drop and energy savings, while ensuring safe handling and disposal, and provides thermal insulation and noise reduction, making it suitable for various applications including cooling lubricant emissions and HVAC systems.
Implementation Method 1
The fluid, which was dispersed in the gas phase, joins and coalesces on the surface of the cells of the foam to form large droplets or a liquid film
Implementation Method 2
Upon attaining certain weight, the droplets or film falls through the medium, and/or along the surface of the cells, by gravity
Implementation Method 3
Due to the sound absorbing properties of the foam, the filter medium can act as a silencer, which reduces the noise level of a filter system with the filter medium
Implementation Method 4
The material provides thermal insulation and can therefore be of value to reduce energy costs
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention refers to a filter medium (10) for separating a dispersed fluid phase from a continuous gas phase, wherein the filter medium (10) comprises a melamine-based foam (11), which has an active filter area of at least 0.3 m2.