Heated CDI Electrodes for Hot Water Softening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing water treatment systems lack the ability to efficiently provide hot water while effectively removing hardness-causing ions such as calcium and magnesium, requiring separate heating devices that increase system complexity and energy consumption.
Innovation Solution
A water treatment apparatus with integrated electrodes that generate heat through applied voltage, incorporating heating elements made of metals like Ni, Cr, Mo, W, Pt, Ti, Ta, NiCr, FeCr, FeNiCr, FeCoNi, FeCrAl, TaAl, SnO, HfB2, RuCr, or IrCr, and carbon-based active materials to both soften and warm water without additional heating devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate heating devices are used to provide hot water, then heating function is achieved, but system complexity and energy consumption increase
Solution Approach 1:
The patent combines the heating function with the deionization electrodes by integrating heating elements into the electrode structure. The electrodes serve dual purposes: removing ions from water and generating heat through applied voltage, thereby eliminating the need for separate heating devices and reducing system complexity
Solution Approach 2:
The electrodes are designed to perform multiple functions simultaneously: ion removal through capacitive deionization and heat generation for water heating. This multi-functionality allows a single component to address both water softening and heating requirements, reducing the overall number of components needed in the system
2Temperature
If separate heating devices are used to provide hot water, then heating function is achieved, but energy consumption increases
Solution Approach 1:
The heating function is merged with the deionization process by integrating heating elements into the electrodes. The same electrical power supply that drives ion removal also generates heat, allowing the system to utilize the applied voltage for dual purposes and reduce overall energy consumption compared to separate heating devices
Solution Approach 2:
The electrodes perform multiple functions including ion removal and heat generation. By using the electrodes for both deionization and heating, the system eliminates redundant energy consumption associated with separate heating devices, as the electrical energy already applied for ion removal is also converted to useful heat
3Device complexity
If heating elements are integrated into electrodes, then system compactness and energy efficiency are enhanced, but electrode material requirements become more stringent
Solution Approach 1:
The electrodes are constructed as composite structures combining conductive materials (such as graphite or metal foils) with heating element materials (such as nickel-chromium alloys). This composite approach allows the electrode to simultaneously provide electrical conductivity for deionization and thermal properties for heating, while meeting the stringent material requirements through careful material selection and integration
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 efficiently removes divalent cations like Ca2+ and Mg2+ while warming the water, enhancing system compactness and energy efficiency by integrating heating and deionization functions, thus providing hot, softened water without separate heating units.
Implementation Method 1
At least one of the first current collecting layer or the second current collecting layer includes a heating element configured to generate heat based on application of a voltage
Implementation Method 2
capacitive deionization (CDI), which is used to remove ions by electrochemically adsorbing the ions onto electrodes with a high specific surface area
Implementation Method 3
The CDI apparatus may generate an electric field perpendicular to the fluid flow direction inside the channel to drive ion movement
Data Source
AI summary
A water treatment apparatus includes a first electrode including a first current collecting layer and a first porous electrode, a second electrode including a second current collecting layer and a second porous electrode, a deionization channel formed between the first electrode and the second electrode; and a flow changer provided as an internal structure within the deionization channel and configured to change a flow of fluid passing through the deionization channel. At least one of the first current collecting layer or the second current collecting layer may include a heating element configured to generate heat based on application of a voltage.