Electrochemical Chlorine Generation System with Membrane Segmentation
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Solution Overview
Problem
Conventional systems for generating hypochlorous acid in situ are large, expensive, and produce inconsistent outputs with varying pH, free available chlorine (FAC), and oxidation-reduction potential (ORP), limiting their applications due to low FAC concentrations and impracticality for portable use.
Innovation Solution
A system comprising an anodic and cathodic chamber separated by a membrane, with independent power supplies and a microprocessor for controlling electric potential differences, generating chlorine-containing compounds like hypochlorous acid on demand with improved consistency and concentration, using graphite electrodes to minimize costs and prevent scale buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional systems are used to generate hypochlorous acid in situ, then the system can provide disinfecting capability, but the system becomes large, expensive, and produces inconsistent outputs
Solution Approach 1:
The system is divided into separate anodic and cathodic chambers with distinct functions. The anodic chamber generates hypochlorous acid while the cathodic chamber handles oxygen evolution, allowing independent optimization of each chamber for its specific function and improving overall output consistency
Solution Approach 2:
A proton-exchange membrane serves as an intermediary between the anodic and cathodic chambers, allowing selective proton transport while preventing mixing of reaction products. This mediator enables consistent pH control in the anodic chamber and prevents contamination that would affect output reliability
2Quantity of substance
If conventional systems generate hypochlorous acid, then disinfecting capability is provided, but free available chlorine concentration remains low
Solution Approach 1:
The system optimizes electrical parameters (voltage, current density) and chemical parameters (salt concentration, pH control) to maximize hypochlorous acid generation efficiency. By controlling the electrochemical reactions through parameter optimization, the system achieves high FAC concentrations without requiring expensive conventional chemical addition systems
Solution Approach 2:
The system replaces mechanical mixing and chemical dosing systems with electrochemical generation. Instead of using pumps, agitators, and chemical storage systems, the system uses controlled electrochemical reactions at electrodes to generate hypochlorous acid in situ, reducing system cost while achieving high concentrations
3Duration of action of stationary object
If hypochlorous acid is generated for extended periods, then disinfecting capability is maintained, but pH varies and consistency is lost
Solution Approach 1:
The system incorporates pH monitoring and control mechanisms that provide feedback to the power supply system. When pH deviates from the optimal range, the system automatically adjusts electrical parameters to restore pH stability, enabling consistent operation over extended periods
Solution Approach 2:
The system maintains continuous electrochemical generation of hypochlorous acid through sustained application of electrical current. The proton-exchange membrane ensures continuous proton transport, and the controlled electrochemical reactions provide uninterrupted generation of disinfecting agent with stable composition
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 system generates chlorine-containing compounds at higher concentrations than conventional methods, with consistent FAC and ORP values, enabling efficient on-demand production and reducing costs, while being more portable and cost-effective.
Implementation Method 1
A membrane is disposed between and separates the anodic chamber and the cathodic chamber
Implementation Method 2
conventional systems for generating hypochlorous acid in situ
Data Source
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AI summary
A system (10) for generating a chlorine-containing compound includes an anodic chamber (12), a cathodic chamber (20), and a brine chamber (30). The anodic chamber (12) includes an anodic electrode (14) and the cathodic chamber (20) includes a cathodic electrode (22). A membrane (28) separates the anodic and cathodic chambers (12), (20). The brine chamber (30) includes an anodic electrode (32) and a cathodic electrode (34). Concentration and type of the chlorine-containing compound can be selectively and consistently controlled by the system (10) in real time.