Polymeric Water Softening Electrolyzer for Low-Pressure High Flow
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Solution Overview
Problem
Existing electrolyzer devices for water softening suffer from internal pressure buildup and water throughput limitations due to the evolution of gases, limiting their practicality for domestic and industrial use.
Innovation Solution
A water softening electrolyzer device configured to operate in an oxygen starvation mode, consuming all dissolved oxygen and generated oxygen without producing excess gases, allowing a polymeric housing and maintaining low internal pressure, with specific voltage and current density settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrolysis is used to soften water, then water softening is achieved, but internal pressure builds up and water throughput is limited
Solution Approach 1:
The patent changes the operating parameters of electrolysis by controlling current density and voltage to operate in oxygen starvation mode, where the cathodic reaction consumes oxygen at the same rate it is produced anodically, preventing gas accumulation and pressure buildup while maintaining effective water softening
Solution Approach 2:
The system dynamically adjusts the balance between oxygen production at the anode and oxygen consumption at the cathode through controlled electrochemical reactions, creating a self-regulating system that prevents pressure buildup while maintaining high water throughput
2Productivity
If high current density is used to increase water softening rate, then productivity improves, but hydrogen gas evolution increases causing pressure buildup
Solution Approach 1:
The patent optimizes the current density parameter to a specific range that maximizes the oxygen reduction reaction at the cathode while minimizing the hydrogen evolution reaction, thereby achieving high water softening rates without excessive hydrogen gas production
Solution Approach 2:
The patent converts the normally harmful hydrogen gas evolution into a beneficial process by controlling the potential to favor oxygen reduction, where the electrons that would otherwise produce hydrogen are instead used to consume oxygen, turning a potential pressure problem into a pressure solution
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 device achieves high water flow rates of at least 3 m3/h while maintaining an internal pressure of less than 1.2 atm, effectively softening tap water without the need for high-pressure metal casings, using a polymeric material.
Implementation Method 1
O2(aq)+2H2O+4e−→4OH−
Implementation Method 2
H2O→O2+4H++4e−
Implementation Method 3
Ca2++HCO3−+OH−→CaCO3(s)↓+H2O
Implementation Method 4
Mg2++2OH−→Mg(OH)2(s)↓
Data Source
AI summary
A high-output tap water softening electrolyzer device, housed in a non-metal casing and configured for low internal pressure buildup and a method of using the same are provided herein, wherein the casing and the lid of the device are made essentially from a polymeric material rather than a metal.