Segmented Spacer Design for Uniform Fluid Flow in Electrical Purification
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Solution Overview
Problem
Existing electrical purification apparatuses face inefficiencies due to non-uniform fluid flow and leakage issues, which affect the quality and efficiency of water treatment, particularly at varying feed conductivity levels.
Innovation Solution
The apparatus features a design with alternating ion depleting and concentrating compartments defined by ion exchange membranes, utilizing spacers with specific geometries and seals to ensure uniform fluid flow and prevent leakage, including a cap and body configuration that provides a manifold for consistent fluid distribution and inter-membrane spacing to enhance operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spacers are used in electrical purification apparatus, then the structure is simple to manufacture, but non-uniform fluid flow and leakage issues occur affecting water treatment quality
Solution Approach 1:
The spacer is divided into a body portion and a cap portion that can be assembled together. The cap portion includes sealing elements that mate with the body to create leak-proof compartments. This segmentation allows for specialized functionality in each part while maintaining manufacturing simplicity through modular assembly.
Solution Approach 2:
Different regions of the spacer are designed with different properties: the body portion has flow distribution channels for uniform fluid flow, while the cap portion has sealing surfaces and gaskets for leakage prevention. This local differentiation of functionality resolves the contradiction by optimizing each region for its specific purpose.
2Reliability
If spacers with complex geometries are used to achieve uniform fluid flow, then water treatment quality improves, but manufacturing complexity and cost increase
Solution Approach 1:
The complex spacer geometry is segmented into a body and cap that can be manufactured separately using standard molding techniques. The body contains flow distribution features while the cap contains sealing features. This segmentation allows each component to be manufactured independently with simpler tooling while achieving the combined functionality of uniform flow and leakage prevention.
Solution Approach 2:
Multiple functions (flow distribution, sealing, compartment definition) are merged into a single spacer assembly of the body and cap. This integration achieves uniform fluid flow through the body's channel design while preventing leakage through the cap's sealing elements, all within a single manufacturable assembly that doesn't require complex multi-part construction.
3Reliability
If thicker spacers are used to prevent leakage, then sealing reliability improves, but fluid flow uniformity and treatment efficiency decrease
Solution Approach 1:
The sealing function is segmented into a dedicated cap portion with integrated sealing elements (gaskets, O-rings, or molded seals) that mate with the body. This allows effective sealing to be achieved with thin sealing layers rather than requiring the entire spacer to be thick. The thin spacer body maintains good fluid contact with membranes for efficient treatment while the cap provides robust sealing.
Solution Approach 2:
The spacer design applies different thicknesses locally: the body portion is thin (e.g., 0.5-2 mm) to maintain proximity to membranes for efficient ion removal and uniform flow, while the cap portion includes thicker sealing regions (e.g., 1-3 mm) where thickness is needed for sealing reliability. This local differentiation resolves the contradiction between sealing performance and flow efficiency.
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 design achieves improved product water quality and reduced residence times, maintaining high water quality over a wide range of feed conductivities while optimizing energy usage and reducing operational costs.
Implementation Method 1
a plurality of alternating ion depleting compartments and ion concentrating compartments defined by a plurality of ion exchange membranes
Implementation Method 2
electrical purification apparatus... ion depleting compartments and ion concentrating compartments
Data Source
AI summary
An electrical purification apparatus and methods of making same are disclosed. The electrical purification apparatus may provide for increases in operation efficiencies, for example, with respect to decreased residence times and higher purity water.