Elastic Filter Bag Preventing Channeling in Water Systems
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Solution Overview
Problem
Existing in-line water filtration systems face challenges in maintaining high fluid flow velocity while ensuring adequate exposure of the filtration medium, as axial flow filters suffer from pressure loss and channeling, while radial flow filters have limited path length and reduced filtration efficiency.
Innovation Solution
A modular filtration system utilizing a waterproof, inwardly pressurized elastic filtration bag with a filter receiver that directs fluid flow through a filtration medium, featuring a bi-modal retention bag with an impermeable upper layer and permeable lower layer to prevent channeling and enhance exposure, coupled with a filter receiver that includes apertures and a shield to manage fluid flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If axial flow filtration is used to increase filtration medium exposure, then the fluid must pass through a longer path increasing exposure, but pressure loss increases and flow velocity decreases
Solution Approach 1:
The patent transitions from axial flow (one-dimensional linear path) to radial flow (two-dimensional outward expansion), allowing fluid to contact filtration medium from multiple directions simultaneously. This dimensional change increases exposure area without proportionally increasing pressure loss, as fluid enters from the outer perimeter and moves inward through the filtration medium.
Solution Approach 2:
The filtration system is divided into multiple radial flow paths that converge toward a central collection point. This segmentation allows parallel flow paths through the filtration medium, increasing total exposure area while maintaining lower pressure loss compared to a single axial path.
2Area of stationary object
If axial flow filtration is used to increase filtration medium exposure, then the fluid must pass through a longer path increasing exposure, but flow velocity decreases
Solution Approach 1:
By arranging flow paths radially from the outer perimeter toward the center, the system maintains shorter individual path lengths while increasing total exposure area through multi-directional flow. This preserves higher flow velocity compared to long axial paths.
3Productivity
If radial flow filtration is used to increase surface area contact, then flow rates remain high with low pressure loss, but the path length through the filtration medium is limited reducing filtration process effectiveness
Solution Approach 1:
The radial flow path is segmented into multiple concentric zones that fluid passes through sequentially. This segmentation effectively increases the total path length and filtration exposure while maintaining the radial flow configuration that preserves high flow rates and low pressure loss.
Solution Approach 2:
The system uses radial geometry to convert a two-dimensional surface area problem into an effective three-dimensional flow path. Fluid enters from the outer perimeter and progresses inward through multiple radial segments, increasing exposure without the pressure loss penalties of axial flow.
4Reliability
If filter media is compressed to prevent channeling, then filtration efficiency improves, but flow velocity decreases
Solution Approach 1:
An elastic membrane is used to compress and contain the filtration medium, applying uniform pressure to prevent channeling while maintaining flow paths. The flexibility of the membrane allows it to conform to the medium's shape and maintain compression without rigid constraints that would severely restrict flow.
Solution Approach 2:
The system changes the physical state of the filtration medium by compressing it within the elastic membrane, increasing density and preventing channeling. This parameter change improves filtration efficiency while the elastic nature of the membrane ensures flow velocity is maintained through flexible pressure distribution.
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 system achieves high fluid flow velocity with optimal filtration medium exposure, reducing pressure loss and preventing channeling, thereby improving filtration efficiency and extending the life of the filtration medium.
Implementation Method 1
A filter for the treatment of fluid. The filter may comprise a filter intake receiver, said filter intake receiver including a mounting coupler adapted to mate with a portion of a container, a hollow tube extending along a longitudinal axis, said hollow tube comprising at least one aperture, a filtration medium enclosed within a retaining bag, said retaining bag coupled to said filter intake receiver around said at least one aperture, wherein at least a portion of said retaining bag comprises a permeable material, and wherein at least a portion of said retaining bag comprises an impermeable material
Implementation Method 2
said at least a portion of said retaining bag comprises a permeable material, and wherein at least a portion of said retaining bag comprises an impermeable material
Data Source
AI summary
A novel fluid filter includes a partially permeable elastic bag encapsulating a filtration medium, and providing pressure to prevent channeling. A receiver with one or more apertures fits at least partially within the filtration bag to receive treated fluid. A cover may be placed over a tube of the receiver to prevent filtration medium from exiting system. An upper portion of the filtration bag is impermeable, while the lower portion of the bag is permeable. The fluid path flows over the top and up through the lower section and through a major path through the filtration medium.