Insulated Supply Line Assembly for High-Temperature Gas Analysis
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Solution Overview
Problem
Existing combustion apparatuses face challenges in maximizing combustion efficiency, particularly in large systems where waste gas stratification occurs, and in handling fuels with high hydrogen content, which require precise control of oxygen levels in waste gases.
Innovation Solution
The proposed solution involves an arrangement with one or multiple supply lines that are designed to withstand thermal, mechanical, and chemical stresses. This arrangement includes a rod-shaped insulating body made of temperature-resistant and electrically insulating material, surrounded by a sheathing, with spacers providing a gap for improved thermal insulation and mechanical support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple probes are installed to obtain stratification information in large systems, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The waste gas stack is divided into multiple measurement zones along the probe length, with multiple sensor elements positioned at different heights. Each sensor measures oxygen concentration in its specific zone, enabling detection of vertical stratification without requiring multiple separate probes. The probe itself is segmented into multiple functional sections.
Solution Approach 2:
The solution transitions from using multiple separate probes (spatial distribution in one dimension) to using a single probe with multiple sensor elements distributed along its length (adding the dimension of vertical positioning). This transforms the measurement approach from multiple independent devices to one integrated multi-zonal device.
2Productivity
If supply lines are exposed to high temperature waste gases, then gas analysis capability is maintained, but reliability of supply lines deteriorates
Solution Approach 1:
A ceramic insulating body is introduced as an intermediary between the hot waste gas environment and the electrical supply lines. This ceramic barrier protects the supply lines from direct thermal exposure while still allowing electrical signals to pass through, enabling the supply lines to remain outside the hottest zone while maintaining gas analysis capability.
Solution Approach 2:
The supply lines are nested within or alongside the ceramic insulating body structure. The ceramic housing contains and protects the electrical supply lines, creating a nested arrangement where the inner component (supply line) is protected by the outer protective structure (ceramic housing) from the harsh thermal environment.
3Temperature
If a gap is provided between insulating body and sheathing for thermal insulation, then temperature resistance is improved, but mechanical strength deteriorates
Solution Approach 1:
The ceramic insulating body has non-uniform thickness, being thicker in regions where thermal insulation is most critical and thinner where mechanical strength is prioritized. This variable cross-section optimizes the balance between thermal protection and structural integrity, providing localized insulation where needed while maintaining overall mechanical robustness.
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 solution effectively enhances the durability and reliability of supply lines in combustion apparatuses, allowing for precise gas analysis and improved combustion efficiency, even in large systems and with fuels containing high hydrogen volumes.
Implementation Method 1
a rod-shaped insulating body (3) which is made of an electrically insulating and temperature-resistant material
Implementation Method 2
comprises spacers (5, 6a, 6b, 7a, 7b) so as to provide a spacing between the rod-shaped insulating body (3) and the sheathing (2)
Data Source
AI summary
An arrangement comprises at least one first electrically conductive supply line, a sheathing, and a rod-shaped insulating body. The sheathing has a first end and a second end and the first end is different from the second end and the first end is opposite the second end and the sheathing has a first opening at the first end and a second opening at the second end. The first supply line runs from the first end to the second end through the arrangement and defines an axis. The rod-shaped insulating body comprises a passage through the rod-shaped insulating body and a first section of the supply line runs in the passage through the rod-shaped insulating body.