Oxide-Nonoxide Ceramic Multilayer Filter Membrane
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Solution Overview
Problem
Existing filter membranes made of oxide ceramic hollow fibers are prone to clogging and are expensive to produce, limiting their effectiveness and efficiency in filtration processes.
Innovation Solution
A multi-layer filter membrane configuration comprising a first layer of oxide ceramic material as a carrier layer and a second layer of non-oxide ceramic material as a separation layer, with optional additives to improve mechanical strength and thermal expansion matching, allowing for cost-effective production and enhanced filtering properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If oxide ceramic hollow fibers are used for filtration, then mechanical strength is improved, but clogging occurs gradually and diffusion flow is impaired
Solution Approach 1:
The filter membrane is divided into multiple functional layers: a support layer made of oxide ceramic material providing mechanical strength, and a separate filtering layer made of non-oxide ceramic material that performs the filtration function. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The invention uses a composite structure combining oxide ceramic material (for mechanical strength) with non-oxide ceramic material (for filtration performance). This composite approach leverages the advantages of both material types while avoiding their individual disadvantages.
2Reliability
If non-oxide ceramic material is used for hollow fibers, then filtering properties are improved, but production cost increases significantly
Solution Approach 1:
The filter membrane is divided into multiple functional layers: a support layer made of oxide ceramic material providing mechanical strength, and a separate filtering layer made of non-oxide ceramic material that performs the filtration function. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
Different regions of the filter membrane have different material compositions optimized for their specific functions: the support layer uses oxide ceramic for structural integrity, while the filtering layer uses non-oxide ceramic for optimal filtration performance. Each layer has local material quality matched to its functional requirements.
3Reliability
If multi-layer configuration is implemented, then filtering performance is improved, but device complexity increases
Solution Approach 1:
The filter membrane is divided into multiple functional layers: a support layer made of oxide ceramic material providing mechanical strength, and a separate filtering layer made of non-oxide ceramic material that performs the filtration function. This segmentation allows each layer to optimize its specific function without compromising the other.
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
The multi-layer membrane design significantly reduces clogging and maintains high diffusion flow over extended periods, offering improved filtering performance and longer service life compared to traditional oxide ceramic membranes, while being more economical to produce.
Implementation Method 1
These hollow fibers however clog gradually so that the diffusion flow is impaired
Data Source
AI summary
A filter membrane of a multi-layer configuration for filtration of a medium is provided with at least one first layer that has as a main component an oxide ceramic material and is provided with at least one second layer that has as a main component a non-oxide ceramic material. The first layer is a carrier layer and the second layer is a separation layer that filters the medium and generates a retentate and a permeate.