Piezoelectric Vibration for Electrode Regeneration in Deionization
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Solution Overview
Problem
Conventional water softening methods using ion exchange resins are uneconomical and generate secondary chemical waste, while existing deionization techniques like CDI lack efficient regeneration methods for maintaining electrode performance.
Innovation Solution
A deionization apparatus utilizing porous carbon electrodes with a piezoelectric element to generate vibrations, applying a sine wave signal to separate ions from the electrodes, thereby regenerating the electrodes without chemical solutions and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ion exchange resin is used for water softening, then water hardness is reduced, but chemical waste is generated and costs increase
Solution Approach 1:
The patent replaces the chemical ion exchange resin system with a physical/electrical capacitive deionization system using porous carbon electrodes. Instead of chemical reactions to remove ions, the system uses electrical fields to attract and hold ions on the electrode surfaces, eliminating the need for chemical regenerants and waste generation.
Solution Approach 2:
The patent changes the operating parameters from chemical concentration-based ion exchange to electrical field-based capacitive deionization. By controlling voltage application and electrode potential, the system achieves ion removal without chemical additives, and regeneration is achieved through simple voltage reversal or pulse application rather than chemical treatment.
2Reliability
If ion exchange resin is used for water softening, then water hardness is reduced, but energy consumption increases
Solution Approach 1:
The patent replaces the chemically intensive ion exchange process with an electrical capacitive system that stores energy in the electric field between electrodes. This substitution reduces continuous chemical treatment requirements and lowers operational energy consumption compared to maintaining resin beds and performing chemical regenerations.
3Object-generated harmful factors
If conventional CDI is used for deionization, then chemical waste is minimized, but electrode regeneration is inefficient
Solution Approach 1:
The patent employs periodic voltage application and reversal cycles to regenerate the porous carbon electrodes. After ions are accumulated on the electrodes during deionization, the system applies reverse polarity or pulse voltage to rapidly desorb and remove the accumulated ions, enabling efficient periodic regeneration without chemical solutions.
Solution Approach 2:
The system uses its own electrical field to regenerate the electrodes rather than requiring external chemical agents. The capacitive electrodes can be regenerated by simply reversing the voltage polarity or applying a pulse, allowing the system to self-regenerate the electrode surfaces and maintain deionization capability.
4Reliability
If ion exchange resin is used for water softening, then water hardness is reduced, but device complexity increases
Solution Approach 1:
The patent simplifies the system by replacing complex chemical handling infrastructure (resin tanks, chemical dosing systems, waste treatment) with a simpler electrical system consisting of power sources, control circuits, and electrode assemblies. This substitution reduces operational complexity while maintaining water treatment effectiveness.
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 apparatus effectively regenerates electrodes, reduces energy consumption by 10-20 fold, and minimizes chemical waste, offering a more efficient and sustainable water treatment solution compared to traditional methods.
Implementation Method 1
a piezoelectric element to generate vibrations, applying a sine wave signal to separate ions from the electrodes
Implementation Method 2
negative ions are electrically absorbed to a positive electrode and positive ions are electrically absorbed to a negative electrode so as to eliminate ions dissolved in a fluid such as water
Data Source
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AI summary
A deionization apparatus for regenerating electrodes using vibration and a method of controlling the same. The deionization apparatus includes electrodes to which ions contained in a fluid are absorbed, and a piezoelectric element to separate the ions absorbed to the electrodes by vibration. Since the ions absorbed to the electrodes are separated using mechanical energy generated by the piezoelectric element, it may be possible to more rapidly perform regeneration of the electrodes.