Radial Flow Column with Adjustable Packing Density
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Solution Overview
Problem
Radial flow columns face issues with channel formation due to variations in packing density and media loss, leading to reduced contaminant removal efficiency and potential contamination of treated water, as well as challenges in designing and constructing these systems effectively.
Innovation Solution
A radial flow column design featuring an adjustable element, such as an inflatable bladder or resiliently biased plunger, to maintain a predetermined packing density of the media bed, combined with the use of a filtration aid like diatomaceous earth, and a method to optimize component sizing for improved filtration performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flow rate and bed height are increased to improve throughput, then productivity increases, but pressure drop increases causing media compression and channel formation which reduces reliability
Solution Approach 1:
The patent inverts the conventional axial flow direction by implementing radial flow from the outer periphery toward the center. This inversion changes the flow pattern to move perpendicular to the media bed depth, reducing pressure drop and preventing media compression while maintaining high throughput. The radial configuration allows water to enter at the outer screen and exit at the inner screen, fundamentally altering the hydraulic behavior of the system.
Solution Approach 2:
The patent transitions from one-dimensional axial flow to two-dimensional radial flow by arranging the media bed in an annular configuration between inner and outer screens. This dimensional change enables flow to occur across the radial dimension rather than vertically through the bed, distributing flow more evenly and preventing channel formation while maintaining high productivity.
2Reliability
If packing density is increased to improve contaminant removal efficiency, then purification performance improves, but flow distribution becomes non-uniform causing channel formation which reduces reliability
Solution Approach 1:
The radial flow configuration creates more uniform flow distribution across the media bed by equalizing the hydraulic potential gradient. Water flows radially inward through the annular media bed, experiencing relatively uniform velocity distribution that prevents localized high-velocity channels while maintaining high packing density for effective contaminant removal.
Solution Approach 2:
The annular media bed configuration allows different radial zones to have optimized local properties. The media can be packed with high density throughout the annular region, and the radial flow pattern ensures each local zone receives appropriate flow distribution, preventing channel formation while maintaining overall high purification efficiency.
3Volume of moving object
If media bed volume is reduced to decrease device size, then compactness improves, but flow distribution becomes non-uniform leading to channel formation which reduces reliability
Solution Approach 1:
The patent uses radial flow in the annular region between inner and outer screens to achieve compact design without sacrificing flow distribution. By utilizing the radial dimension rather than increasing axial height, the system maintains a compact footprint while ensuring uniform flow across the media bed, preventing channel formation even in reduced-volume configurations.
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 solution effectively prevents channel formation, maintains contaminant removal efficiency, and enhances the design and operation of radial flow columns, allowing for higher throughput and energy efficiency while ensuring consistent water treatment quality.
Implementation Method 1
an adjustable element biased into the media bed compartment and configured to maintain a predetermined packing density of a media bed
Implementation Method 2
The contaminant-removing media may extract particular contaminants of interest via a number of different mechanisms such as absorption, adsorption, ion exchange, affinity, hydrophilic interactions, hydrophobic interactions, size exclusion
Implementation Method 3
The contaminant-removing media may extract particular contaminants of interest via a number of different mechanisms such as absorption, adsorption, ion exchange, affinity, hydrophilic interactions, hydrophobic interactions, size exclusion
Implementation Method 4
an inner permeable retainer positioned in the fluid chamber, an outer permeable retainer positioned in the fluid chamber spaced apart from and surrounding the inner permeable retainer
Data Source
AI summary
Aspects and embodiments of the present invention are directed to apparatus and methods of filtering a fluid to reduce a level of at least one contaminant therein. The filtering of the fluid may be accomplished with a radial flow filtration column comprising a fluid chamber having an inlet, an outlet, and a side wall, an inner permeable retainer positioned in the fluid chamber, an outer permeable retainer positioned in the fluid chamber spaced apart from and surrounding the inner permeable retainer, a media bed compartment formed between the inner permeable retainer and the outer permeable retainer, and an adjustable element biased into the media bed compartment and configured to maintain a predetermined packing density of a media bed to be disposed within the media bed compartment.