Electrodeionization Regeneration for Hydrogen Peroxide Purity Recovery
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Solution Overview
Problem
Existing electrodeionization systems used for hydrogen peroxide purification suffer from stability and performance issues due to ion and organic carbon buildup, leading to inefficient operation and prolonged recovery times after restarts.
Innovation Solution
A method involving electrical regeneration of the electrodeionization system using ultrapure water and controlled current density to restore ion exchange resin effectiveness, combined with a primary purification system using adsorbent resin to remove impurities before secondary purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electrodeionization system operates continuously for hydrogen peroxide purification, then production efficiency is maintained, but ion and organic carbon buildup occurs on the ion exchange resin, leading to increased resistance and reduced purification performance
Solution Approach 1:
The patent implements periodic electrical regeneration cycles where the electrodeionization system alternates between purification mode and regeneration mode. During regeneration, a high current density (3-10 times the operating current density) is applied to the ion exchange resin to electrochemically remove accumulated ions and organic carbon, restoring the resin's purification capacity without requiring system shutdown or manual intervention.
Solution Approach 2:
The system performs self-regeneration through automated electrical regeneration cycles. The control system automatically detects when the ion exchange resin requires regeneration based on operational parameters and initiates the regeneration process, allowing the system to maintain optimal performance without external intervention or manual maintenance.
2Ease of operation
If the electrodeionization system is restarted after stopping operation, then system availability is improved, but bubble generation occurs due to residual hydrogen peroxide decomposition, and resistance increases, prolonging recovery time
Solution Approach 1:
Before restarting the electrodeionization system after a shutdown, the patent performs preliminary electrical regeneration to remove residual ions and organic carbon from the ion exchange resin. This preliminary action prevents bubble generation and resistance increase during subsequent operation, eliminating the need for prolonged recovery periods and ensuring immediate full-performance operation upon restart.
3Reliability
If higher current density is applied during electrical regeneration, then ion and organic carbon removal efficiency is improved, but energy consumption increases
Solution Approach 1:
The patent applies high current density (3-10 times the operating current density) during electrical regeneration to achieve rapid and thorough removal of ions and organic carbon from the ion exchange resin. Although this excessive action increases energy consumption during the brief regeneration period, it significantly reduces the frequency of required regeneration cycles and ensures complete restoration of resin performance, thereby reducing overall energy consumption compared to lower current density approaches that would require more frequent or prolonged regeneration.
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
Enhances the stability and rapid recovery of electrodeionization systems by effectively removing ions and organic carbon, preventing bubble generation and reducing resistance, thereby maintaining high-purity hydrogen peroxide production.
Implementation Method 1
performing electrical regeneration while introducing ultrapure water into the electrodeionization system
Implementation Method 2
an electrodeionization system used for purification of hydrogen peroxide
Implementation Method 3
purifying a crude product of hydrogen peroxide with an adsorbent resin of a primary purification system
Data Source
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AI summary
The present invention relates to a method for regenerating an electrodeionization system and a method for purifying hydrogen peroxide using the same, and more particularly, to the method including stopping operation of the electrodeionization system used for purification of hydrogen peroxide; performing electrical regeneration while introducing ultrapure water into the electrodeionization system; and restarting the electrodeionization system to perform purification of hydrogen peroxide. The electrical regeneration is performed at a current density of 30 A/m2 to 100 A/m2.