Electrochemical Cell Compression Frame for Wastewater Treatment
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Solution Overview
Problem
Existing electrochemical cells for wastewater treatment using solid polymer electrolytes suffer from poor operational efficiency and high energy consumption due to issues like electrode deactivation, catalyst site blockage, and inadequate compression systems, leading to low pollutant removal rates and high energy costs.
Innovation Solution
An electrochemical cell design featuring a solid polymer electrolyte membrane with open pore meshes and compression frames that distribute compression force uniformly across the active area, preventing electrical shorting and allowing easy access for wastewater and gas flow, eliminating the need for flow field plates and gas diffusion layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional compression systems are used in electrochemical cells, then assembly is simplified, but electrical shorting occurs and operational efficiency decreases
Solution Approach 1:
The compression frame is divided into multiple compression arms that are distributed across the active area, with each arm providing localized compression. This segmentation prevents electrical shorting by maintaining uniform electrode-membrane contact without creating conductive pathways between electrodes, while still achieving effective compression through distributed force application.
Solution Approach 2:
Compression is applied locally through multiple distributed compression arms rather than uniformly across the entire frame. This local compression approach ensures adequate contact pressure at each compression point while maintaining electrical isolation between electrodes, preventing shorting while achieving reliable operational efficiency.
2Productivity
If flow field plates and gas diffusion layers are used, then electrode protection is improved, but pollutant removal rates decrease and energy consumption increases
Solution Approach 1:
The invention removes flow field plates and gas diffusion layers from the electrochemical cell design. By eliminating these intermediate components, the system achieves direct contact between the electrolyte and electrode surfaces, improving pollutant removal rates and reducing energy consumption associated with pumping and gas management.
Solution Approach 2:
The open pore meshes provide a three-dimensional porous structure that allows electrolyte penetration and gas diffusion without requiring traditional flow field plates. This dimensional approach enables simultaneous mass transport and electrode protection, improving productivity while reducing energy requirements.
3Reliability
If uniform compression force is applied across the active area, then electrical contact is improved, but device complexity increases
Solution Approach 1:
The compression frame incorporates multiple compression arms distributed across the active area, with each arm providing localized compression force. This segmented approach achieves uniform overall compression while maintaining a relatively simple frame structure, improving electrical contact without excessive complexity.
Solution Approach 2:
The compression arms serve multiple functions: providing uniform compression force across the active area, maintaining electrical contact between components, and preventing electrode deformation. This multi-functionality achieves reliable electrical contact while minimizing the number of additional components required.
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 enhances pollutant removal rates, reduces energy consumption, and prevents electrode deactivation, enabling efficient treatment of higher wastewater volumes with lower operational costs and improved electrical efficiency.
Implementation Method 1
an electrochemical cell for wastewater treatment comprising a solid polymer electrolyte membrane, an anode catalyst layer adjacent to a first side of the solid polymer electrolyte membrane and a cathode catalyst layer adjacent to a second side of the solid polymer electrolyte membrane
Implementation Method 2
the membrane has to separate the electrolyte flowing on the anode side from the electrolyte flowing on the cathode side
Implementation Method 3
The second method is indirect electrochemical oxidation of organic and/or inorganic pollutants through the in-situ generation of chemically oxidizing species (such as hydroxyl, chlorine, oxygen or perchlorate radicals or compounds such as hypochlorite, ozone, or hydrogen peroxide). These chemically oxidizing species are generated directly on the anode surface and subsequently oxidize pollutants within the wastewater solution.
Implementation Method 4
electrochemical oxidation is sustainable, safe and has a high treatment efficacy eliminating a wide variety of pollutants
Implementation Method 5
a first compression frame, adjacent to the first open pore mesh and a second compression frame, adjacent to the second open pore mesh, each of the compression frames having compression arms spread within the area delimited by the perimeter of the frame... The fasteners provide the force to compress the solid polymer electrolyte membrane, the catalyst layers and the open pore meshes between the two compression frames
Data Source
AI summary
An electrochemical cell for wastewater treatment comprises a catalyst coated membrane, an open pore mesh placed on each side of the catalyst coated membrane, and a compression frame placed next to each of the open pore meshes. Each compression frame has compression arms spread within the area delimited by the perimeter of the frame to apply a uniform compression force through fasteners which protrude through the compression arms, the open pore meshes and the catalyst coated membrane. Each open pore mesh comprises a flat surface and an embossed surface. The embossed surface can comprise embossed areas around the holes in the open pore mesh, transverse embossed areas which, in the assembled cell, are placed next to the compression arms of the compression frames and peripheral embossed areas along the perimeter of the open pore meshes. The embossed surface provides an improved protection against electro-circuiting.