Self-Cleaning Filter with Flexible Media for Waste Reduction
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Solution Overview
Problem
Current industrial fluid filters generate significant waste and expose workers to harmful chemicals during the filtration process, as they require the replacement of saturated filtration media, leading to the disposal of both the filtered components and the media itself, along with potential loss of valuable liquid.
Innovation Solution
A self-cleaning filter design featuring a tube with perforations and concentrically positioned filter media, where spacers create a space for the media to flex inward during liquid flow and outward during gas flow, allowing for the removal of filter cake without handling the wet media, thereby reducing waste and worker exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional industrial fluid filters are used, then filtration is achieved, but significant waste is generated and workers are exposed to harmful chemicals during media replacement
Solution Approach 1:
The filter enables self-cleaning through automatic backflushing where the filtration media is reversibly expanded and contracted to dislodge and remove captured particles without requiring manual intervention or replacement, making the system self-maintaining and eliminating worker exposure to hazardous materials
Solution Approach 2:
The system recovers and reuses the filtration media by continuously cleaning it in place through backflushing, while only discarding the captured particles through automated removal, thereby reducing waste generation and eliminating the need to dispose of saturated media
2Reliability
If filtration media is replaced when saturated, then filtration efficiency is maintained, but the entire filter assembly including valuable liquid must be disposed of
Solution Approach 1:
The filter performs automatic backflushing to clean the filtration media in place, maintaining filtration efficiency continuously without requiring replacement, and preserves valuable liquid by keeping the entire filter assembly in service rather than disposing of it
Solution Approach 2:
The system recovers valuable liquid and the filtration media by cleaning them in place through automated backflushing, discarding only the captured particles, thereby eliminating the need to dispose of the entire filter assembly when media becomes saturated
3Loss of substance
If filter media is cleaned in place, then waste is reduced, but the media must be handled while wet which increases worker exposure risk
Solution Approach 1:
The system performs automated backflushing to clean the filtration media in place without requiring manual handling, reducing waste while eliminating worker exposure risks by completely automating the cleaning process
Solution Approach 2:
The system uses an automated backflushing mechanism as an intermediary to clean the filtration media, eliminating the need for direct worker contact with wet media while maintaining waste reduction benefits
4Extent of automation
If the filter media is made flexible to enable self-cleaning, then automation is improved, but the structural integrity may be compromised
Solution Approach 1:
The filtration media is designed with reversible flexibility that allows dynamic expansion during backflushing for self-cleaning while maintaining structural integrity during normal filtration operation, enabling automation without compromising strength
Solution Approach 2:
The media's physical state is temporarily changed during backflushing cycles to enable flexibility for cleaning, then returns to its original stable state, allowing automated cleaning while preserving structural integrity through controlled parameter changes
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 self-cleaning filter effectively reduces waste generation and minimizes worker exposure to hazardous substances by allowing the filter cake to be dried and removed without replacing the entire filter assembly, enabling the reuse of filtration media and separate disposal of the cake.
Implementation Method 1
a portion of the filter media is configured to flex inward into the space during the flow of liquid into the filter, and flex outward from the space during the flow of gas exiting the filter
Data Source
AI summary
Embodiments relate generally to a self-cleaning filter. A filter may include a tube comprising perforations. The tube may be configured to receive a flow of a liquid from a first direction or a flow of a gas from a second direction opposite to the first direction. The filter may also include a filter media positioned concentrically around the tube, and spacers positioned between the tube and the filter media to create a space between the tube and the filter media. A portion of the filter media is configured to flex inward into the space during the flow of liquid into the filter, and flex outward from the space during the flow of gas exiting the filter.