CDI Water Treatment Flow Separation for Selective Ion Removal
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Solution Overview
Problem
Existing water treatment apparatuses using capacitive deionization (CDI) technology face inefficiencies in ion removal processes, particularly in managing fluid flow rates and ion concentrations across ion exchange membranes, leading to suboptimal purification efficiency.
Innovation Solution
The apparatus incorporates a fluid separation device with an outer guide and center guide to separate fluids based on ion concentration, directing high-concentration fluids through additional ion removal modules while bypassing lower-concentration fluids, enhancing the overall efficiency of ion removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all fluids discharged from the first ion removal apparatus are guided through the second ion removal apparatus, then ion removal efficiency is improved, but device complexity and resource consumption increase
Solution Approach 1:
The patent applies local quality by differentiating the treatment path based on fluid characteristics. The fluid separation device identifies and separates high-concentration fluids that require additional ion removal through the second apparatus, while allowing low-concentration fluids to bypass directly to the discharge device. This selective approach optimizes ion removal efficiency for fluids that need it while avoiding unnecessary processing for fluids that have already been sufficiently purified.
2Productivity
If the number of ion removal modules is increased, then ion removal efficiency is improved, but loss of substance and resource consumption increase
Solution Approach 1:
The patent implements partial action by applying the second ion removal apparatus only to the portion of fluid that requires it (high-concentration fluids identified by the fluid separation device), rather than processing all fluids through multiple stages. This partial processing approach maintains high ion removal efficiency for problematic fluids while minimizing unnecessary water consumption and resource usage for fluids that have already been adequately treated in the first apparatus.
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 improves ion removal efficiency by selectively guiding high-concentration fluids for further purification, reducing the number of ion removal modules required and optimizing the use of resources, thereby enhancing the overall purification process.
Implementation Method 1
a first cation exchange membrane, a first anion exchange membrane, and a first deionization channel between the first cation exchange membrane and the first anion exchange membrane
Implementation Method 2
capacitive deionization (CDI) technology... removes ions by adsorbing ions to an electrode having a high specific surface area using an electrochemical method... move ions by an electric field generated in a direction perpendicular to the direction in which the fluid flows
Data Source
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AI summary
A water treatment apparatus includes a first ion removal module including a first cation exchange membrane, a first anion exchange membrane, and a first deionization channel therebetween; a second ion removal module including a second cation exchange membrane, a second anion exchange membrane, and a second deionization channel therebetween; and a fluid separation device to separate a fluid, discharged from the first deionization channel, and to guide the fluid. The fluid separation device includes an outer guide to guide a portion of the fluid discharged from the first deionization channel to an outside of the second deionization channel, and a center guide to guide another portion of the fluid from the first deionization channel to the second deionization channel, and the center guide arranged inside of the outer guide..