Piezoelectric Micropillar Filtration for Selective Particle Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing filtration systems are ineffective in separating particles of similar sizes due to clogging issues and require shutdown for cleaning, which can damage the filter media, and are not designed to filter based on characteristics other than size.
Innovation Solution
A filtration system utilizing an array of micropillars that can be aligned with or repelled by a filter media, using coatings and external stimuli like electric or magnetic fields to selectively attract or repel particles of a predetermined substance, allowing for separation based on characteristics other than size, and a light-based mechanism to activate micropillars for particle removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional filter media with predetermined pore sizes are used, then particles of different sizes can be separated, but particles of similar size cannot be effectively filtered and the system becomes clogged after prolonged use
Solution Approach 1:
The micropillars are designed to be dynamically controllable, transitioning between extended and retracted states based on operational needs. This dynamic configuration allows the filtration system to adapt its particle capture capability, enabling effective separation of similar-sized particles while preventing clogging by periodically clearing captured particles through actuation.
Solution Approach 2:
The system changes the physical state or configuration of the micropillars from extended to retracted positions through actuation. This parameter change enables the micropillars to selectively capture and then release particles, achieving both precise separation and continuous operation without clogging.
2Reliability
If filter media is used for one-time use to avoid clogging, then reliability is maintained, but productivity decreases due to frequent replacement and disposal
Solution Approach 1:
The micropillars are periodically actuated to clear captured particles from their surfaces. This periodic action maintains the filtration system's reliability by preventing clogging while ensuring continuous productivity through automated particle removal, eliminating the need for frequent filter media replacement.
Solution Approach 2:
The micropillars automatically clear their own surfaces of captured particles through actuation, enabling self-maintenance without requiring external cleaning processes or system shutdowns. This self-service capability maintains both reliability and continuous productivity.
3Productivity
If cleaning processes are applied to re-use filter media, then productivity is improved, but the filter media may be damaged and the system requires temporary shutdown
Solution Approach 1:
The system replaces traditional mechanical cleaning processes with controlled actuation of smart micropillars. Instead of applying external cleaning forces that may damage the filter media, individual micropillars are actuated to autonomously clear their surfaces, preserving filter media integrity while maintaining productivity.
Solution Approach 2:
The system recovers captured particles from the micropillar surfaces through controlled actuation and transfer to a collection reservoir. This recovery process enables continuous operation without damaging the filter media, as particles are gently transferred rather than forcibly removed.
4Adaptability or versatility
If traditional filtration systems are used, then they can handle general particulates, but they cannot selectively filter particles of a predetermined substance among similar-sized particles
Solution Approach 1:
The micropillars are equipped with specific surface coatings or functional properties that provide local selectivity for predetermined substances. This local quality enables the micropillars to selectively attract and capture target particles while allowing similar-sized non-target particles to pass through, achieving both adaptability and precision.
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
Enables continuous operation with reduced risk of clogging and effective separation of particles of similar sizes by using micropillars that react with specific substances, allowing for continuous filtration without damaging the filter media.
Implementation Method 1
The micropillars are made of piezoelectric material and are configured to bend when a voltage is applied thereto
Implementation Method 2
a light source and a light sensor positioned on opposing sides of said array of micropillars, wherein said light source directs light towards said light sensor through said micropillars
Implementation Method 3
The repository removes the attracted particles from said micropillars by overcoming a force of attraction between the particles and said micropillar by a suction method
Implementation Method 4
The repository removes the attracted particles from said micropillars by overcoming a force of attraction between the particles and said micropillar by a suction method, magnetic attraction
Implementation Method 5
The repository removes the attracted particles from said micropillars by overcoming a force of attraction between the particles and said micropillar by a suction method, magnetic attraction and by electrostatic repulsion
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A filtration system is provided. The filtration system includes a filter media including a plurality of apertures defined therein, and an array of micropillars. Each micropillar is substantially aligned with one of the plurality of apertures and is configured to be repelled by particles of a predetermined substance entrained in a flow channeled through the filtration system.