Oxygen Permeable Membrane Heat Integration in Analytical Devices
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Solution Overview
Problem
Conventional analytical devices for determining the concentration of oxidizable constituents in samples require costly and complex oxygen supply methods, often using pressurized gas bottles or adsorbents with low oxygen purity, and lack efficient energy-saving solutions for heating ceramic materials used in oxygen production.
Innovation Solution
An analytical device with a compact design that incorporates an oxygen production system using a ceramic oxygen permeable membrane, where air is fed through a feed gas guiding system with annular chambers and tubular partitions, allowing heat from the decomposition reactor to be convectively transferred to the membrane, eliminating the need for additional heating sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressurized gas bottles or adsorbents are used for oxygen supply, then oxygen can be provided for thermal decomposition, but the device complexity and costs increase
Solution Approach 1:
The decomposition reactor itself serves as the heating source for the oxygen permeable membrane. The reactor's heating mechanism provides the necessary thermal energy to activate the membrane's oxygen separation function, eliminating the need for external heating devices and complex oxygen supply infrastructure.
Solution Approach 2:
The decomposition reactor performs dual functions: thermal decomposition of samples and heating the oxygen permeable membrane. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while maintaining reliable oxygen supply.
2Ease of manufacture
If adsorbents are used for oxygen production, then oxygen can be generated, but the oxygen purity decreases
Solution Approach 1:
An oxygen permeable membrane with controlled porosity and selective permeability is used to separate oxygen from air. This membrane technology provides high oxygen purity (up to 90% or more) while maintaining a relatively simple device structure, overcoming the limitations of adsorbent-based methods.
3Reliability
If additional heating means are used for ceramic membrane, then sufficient oxygen ion conductivity is achieved, but energy consumption increases
Solution Approach 1:
The decomposition reactor's heating system self-services the oxygen permeable membrane by providing the necessary thermal energy. This eliminates dedicated heating means for the membrane, reducing overall energy consumption while ensuring sufficient oxygen ion conductivity for effective oxygen separation.
4Volume of moving object
If compact construction is achieved, then space requirements are reduced, but structural complexity may increase
Solution Approach 1:
The heating system and oxygen separation system are merged into a single integrated structure. The decomposition reactor's heating elements directly heat the oxygen permeable membrane, combining two functional systems into one compact unit. This reduces overall device volume without significantly increasing structural complexity.
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 solution enables energy-saving oxygen production with minimal structural space requirements, achieving sufficient oxygen ion conductivity without additional heating means, thus reducing costs and complexity while maintaining high oxygen purity.
Implementation Method 1
The ceramic material can be embodied, for example, as a membrane or as granular material, and has at high temperatures an oxygen ion conductivity. This oxygen ion conductivity permits a separation of the oxygen from the remaining components of the surrounding air, in that oxygen is selectively transported through the ceramic material.
Implementation Method 2
a heating apparatus for heating the decomposition reactor to a predetermined operating temperature
Implementation Method 3
allowing heat from the decomposition reactor to be convectively transferred to the membrane
Data Source
AI summary
An analytical device for determining a measured variable dependent on the concentration of one or more constituents of a sample includes a decomposition reactor surrounded by an insulating tube, a heating apparatus, an oxygen production system including at least one oxygen permeable membrane, a housing, and a feed gas guiding system for supplying a feed gas to the at least one membrane of the oxygen production system. The feed gas guiding system includes a reaction space surrounding the at least one membrane and is connected with an inflow duct open to the environment such that at least two partitions are arranged coaxially within the insulating tube and surrounding the decomposition reactor, where the partitions subdivide an intermediate space arranged between the decomposition reactor and the insulating tube into annular chambers forming the feed gas guiding system, where the annular chambers are connected with one another by overflow openings.