Intermediate Frame Electrolyte Flow Uniformity
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Solution Overview
Problem
In three-chamber electrolytic cells, achieving uniform brine flow and maintaining adequate distance between ion exchange membranes while preventing membrane contact is challenging, requiring an intermediate chamber that ensures spatially uniform electrolyte flow and minimal membrane separation.
Innovation Solution
An intermediate frame with arrays of channels on its upper and lower edges, configured to provide spatially uniform electrolyte flow, along with distribution pockets, manifolds, caps, shims, and reinforcement bars to manage electrolyte flow and pressure, ensuring uniform current density and preventing membrane bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the intermediate chamber thickness is reduced to minimize membrane separation, then the distance between membranes is minimized, but the flow distribution becomes non-uniform and membranes may contact each other
Solution Approach 1:
The intermediate frame is segmented into multiple channels (e.g., 3-10 channels per array) that divide the flow path into discrete segments. This segmentation allows each channel to independently manage local flow distribution, achieving uniform overall flow even in thin frames while preventing membrane contact through structured spacing
Solution Approach 2:
Different regions of the intermediate frame are assigned different functions: channels provide flow distribution, distribution pockets (6-70 mm wide) concentrate flow at specific locations, and shims provide localized spacing control. This local differentiation enables uniform flow and membrane separation control throughout the frame thickness
2Device complexity
If the intermediate frame structure is simplified, then the device complexity is reduced, but the ability to provide uniform flow and maintain membrane separation is compromised
Solution Approach 1:
The intermediate frame performs multiple functions through integrated components: channels distribute flow uniformly, distribution pockets concentrate and redirect flow, shims maintain membrane spacing, and caps seal the structure. This multi-functionality achieves reliable membrane separation and uniform flow without requiring separate dedicated components for each function
Solution Approach 2:
Shims act as intermediary elements between the intermediate frame and membranes, providing controlled spacing and preventing direct contact. This intermediary component simplifies the overall structure by using a single thin element (0.1-1 mm thick) to accomplish multiple protective functions
3Manufacturing precision
If the number of channels is increased to improve flow uniformity, then the electrolyte distribution becomes more spatially uniform, but the manufacturing complexity and cost increase
Solution Approach 1:
Instead of using a very large number of channels, the design employs a moderate number (3-10 per array) with strategically positioned distribution pockets that concentrate flow at key locations. This partial action approach achieves sufficient flow uniformity without the manufacturing complexity of excessive channels
Solution Approach 2:
Multiple channels are grouped into arrays that feed into common distribution pockets. This merging of channels into functional groups reduces the total number of individual channel openings that need to be manufactured separately, simplifying fabrication while maintaining flow distribution effectiveness
Data Source
AI summary
Provided herein are intermediate frame systems and methods, comprising one or more arrays of channels on upper and/or lower edges of the intermediate frame wherein the channels are configured to provide a spatially uniform flow of electrolyte through the plane of the intermediate frame.