Alternating Adsorbent Diffusion Filter Bag Layers
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Solution Overview
Problem
Filter bags with multi-layer structures become inefficient when contaminants are primarily collected at one layer, leading to uneven fluid distribution and reduced fluid flow rates, resulting in a shortened lifespan.
Innovation Solution
The filter bag design incorporates alternating layers of adsorbent and diffusion mediums, with granular activated carbon as the adsorbent material and thermoplastic materials like polypropylene or polyester for diffusion, joined using ultrasonic welding to enhance fluid flow and contaminant collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a multi-layer filter structure is used to collect contaminants at each layer, then contaminant collection capability is improved, but fluid distribution efficiency deteriorates when contaminants are primarily collected at one layer
Solution Approach 1:
The patent applies local quality by creating different pore size distributions at different locations (layers) within the filter medium. The pore sizes are varied from the inlet side to the outlet side, with smaller pores at the inlet and larger pores at the outlet, optimizing contaminant capture at each specific layer while maintaining overall fluid distribution efficiency.
Solution Approach 2:
The filter medium is segmented into multiple layers with distinct pore size characteristics. Each layer is designed to handle specific contaminant sizes, with the inlet layer capturing larger particles and subsequent layers capturing progressively smaller contaminants, preventing any single layer from becoming overloaded.
2Quantity of substance
If contaminants are primarily collected at one layer, then contaminant removal is improved, but fluid flow rate deteriorates
Solution Approach 1:
The patent implements local quality by varying pore sizes across different layers, with the inlet layer having smaller pores for effective contaminant removal and the outlet layer having larger pores to maintain high fluid flow rates. This localized optimization ensures that each layer performs its specific function efficiently without compromising overall flow.
Solution Approach 2:
The patent transitions from a uniform single-layer structure to a multi-layer three-dimensional structure with progressively varying pore sizes. This dimensional expansion allows contaminants to be captured across multiple layers while maintaining adequate flow paths through the outlet layer, decoupling contaminant removal from flow rate reduction.
3Quantity of substance
If a multi-layer filter structure is used, then contaminant collection is improved, but filter bag lifespan deteriorates due to inefficient fluid distribution
Solution Approach 1:
The patent applies local quality by designing each layer with optimized pore sizes suited to its specific function. The inlet layer with smaller pores handles contaminant capture, while the outlet layer with larger pores maintains efficient fluid distribution, preventing premature saturation of any single layer and extending the overall filter bag lifespan.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the pore size distribution before filtration begins. The inlet layer is designed with smaller pores to initially capture larger contaminants, preventing them from clogging downstream layers and ensuring efficient fluid distribution is maintained throughout the filter's operational 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
This design improves fluid flow efficiency and extends the filter bag's lifespan by optimizing contaminant collection across multiple layers, ensuring consistent performance and prolonged usage.
Implementation Method 1
The filter mediums can be defined by an adsorbent material disposed between two or more thin wall substrates. According to an embodiment of the invention, the adsorbent material can be a granular activated carbon.
Implementation Method 2
The diffusion mediums can be made from a suitable material that is temperature and fluid compatible with a filtering application to be carried out. The diffusion medium can be defined by a woven or non-woven mesh material.
Implementation Method 3
The filter mediums and the diffusion mediums can be joined using ultrasonic welding.
Data Source
AI summary
A filter bag for use in a liquid filtering system is provided. The filter bag comprises a filtration layer. The filtration layer is defined by one or more filter mediums. The filter mediums can be composed of an adsorbent material disposed between two thin wall substrates. The adsorbent material can be a granular activated carbon. The thin wall substrates can be selected to be highly porous thin wall substrates. The filter bag can further comprise one or more diffusion mediums. The diffusion mediums can be defined by a woven or a non-woven mesh material. The mesh material can be selected from a suitable material that is temperature and fluid compatible with the filtering application to be carried out. The filter bag can include alternating layers of medium having one or more filter mediums and one or more diffusion mediums.