Capacitive Deionization Electrode Guide Flow Segmentation
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Solution Overview
Problem
In ion removal apparatuses using Capacitive Deionization (CDI) technology, a portion of the water passing through the flow passage does not come into contact with the electrodes, leading to reduced ion removal performance.
Innovation Solution
The apparatus is designed with a configuration where the liquid flows through a first electrode guide and then a second electrode guide, allowing it to come into contact with both electrodes, enhancing ion removal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water flows through a flow passage with separators and spacers in a CDI apparatus, then the structure provides insulation and liquid permeability, but a portion of water passes through only the spacer without contacting electrodes, reducing ion removal performance
Solution Approach 1:
The flow passage is segmented into multiple regions: an inlet region, a first electrode holder region with first electrodes, a separator region, a second electrode holder region with second electrodes, and an outlet region. This segmentation ensures that water is divided into streams that contact different electrode regions sequentially, preventing bypass flow through spacers only and improving ion removal performance.
Solution Approach 2:
Separators are positioned as intermediary components between the first electrode holder and the second electrode holder. These separators provide insulation and liquid permeability while guiding water flow through the electrode regions, ensuring that water contacts the electrodes before reaching the outlet.
2Reliability
If electrodes are accommodated in electrode holders within gaskets, then the structure enables proper electrode positioning and insulation, but water may bypass the electrodes through spacer regions
Solution Approach 1:
Different regions of the flow passage are given different local qualities: the inlet region allows water entry, the first electrode holder region contains first electrodes for ion adsorption, the separator region provides insulation and flow guidance, the second electrode holder region contains second electrodes for further ion removal, and the outlet region facilitates water discharge. This localized functional differentiation ensures optimal water-electrode contact throughout the flow path.
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
This configuration ensures that the liquid effectively interacts with both electrodes, thereby preventing a reduction in ion removal performance and improving the overall desalination efficiency.
Implementation Method 1
A Capacitive Deionization Ion (CDI) technology is an electric desalination technology applied with the principle of an electric double layer capacitor
Implementation Method 2
the pair of electrodes is applied with a voltage to adsorb a charged ionic substance dissolved in a liquid such as water
Data Source
AI summary
An ion removal apparatus according to this disclosure performs a desalination treatment on a liquid and includes: a first electrode guide having an inlet allowing the liquid to flow in, a first electrode holder holding a first electrode that adsorbs an ion in the liquid, and an inflow passage serving as a flow passage connecting the inlet and the first electrode holder to one another; and a second electrode guide having an outlet allowing the liquid to flow out, a second electrode holder allowing the liquid passing through the first electrode holder to flow in and holding a second electrode that adsorbs the ion in the liquid, and an outflow passage serving as a flow passage connecting the outlet and the second electrode holder to one another.