Burner Ignition Voltage Monitoring for Hydrogen Flame Detection
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Solution Overview
Problem
Existing methods struggle to achieve simple adjustment of the fuel gas-air mixture, particularly when using hydrogen-containing fuels, and lack effective control over burner operation.
Innovation Solution
A method that evaluates the voltage profile across a capacitor between ignition electrodes to detect flame formation, using a large gradient as an indicator of high hydrogen content and a small gradient as an indicator of low hydrogen content, allowing precise adjustment of the fuel gas-air mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage measurement is performed before ignition spark generation to determine minimum voltage value, then ignition spark quality can be assessed, but the measurement timing is extended and does not provide real-time feedback during combustion
Solution Approach 1:
The capacitor is charged in advance during the ignition cycle before combustion occurs, so that when combustion starts, the voltage profile is already ready for immediate measurement. This preliminary charging action enables real-time detection of combustion characteristics without extending the overall measurement time.
Solution Approach 2:
The system continuously measures the voltage profile across the capacitor during the ignition and combustion process, providing real-time feedback about the combustion state. This feedback loop allows the control unit to adjust the fuel gas-air mixture based on actual combustion conditions, improving both measurement precision and timing efficiency.
2Ease of operation
If fuel gas-air mixture adjustment is simplified, then ease of operation improves, but precision in controlling the mixture composition deteriorates
Solution Approach 1:
The system automatically monitors the voltage profile during combustion and self-adjusts the fuel gas-air mixture ratio without requiring manual intervention. The control unit processes the voltage data and autonomously optimizes the mixture composition, achieving both simplicity in operation and precision in control.
Solution Approach 2:
The system dynamically changes the fuel gas-air mixture parameters (ratio, concentration) based on real-time voltage profile measurements. By continuously adjusting these parameters in response to combustion characteristics, the system achieves precise control while maintaining simple operation through automated parameter optimization.
3Productivity
If hydrogen content in fuel gas is increased, then combustion efficiency improves, but difficulty in detecting and measuring combustion characteristics increases
Solution Approach 1:
The capacitor acts as an intermediary element that converts the combustion characteristics into measurable voltage signals. By measuring the voltage profile across the capacitor rather than directly measuring combustion parameters, the system can detect combustion characteristics even when hydrogen content is high, maintaining both efficiency and measurability.
Solution Approach 2:
The system replaces direct physical measurement of combustion characteristics with electrical measurement of voltage profile. This substitution allows for easier detection and measurement of combustion parameters, especially when dealing with hydrogen-containing fuels that are difficult to measure directly, while maintaining combustion efficiency.
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
Enables precise monitoring and control of burner start-up by determining the hydrogen content in the fuel gas, ensuring optimal combustion conditions and efficient operation.
Implementation Method 1
the voltage profile on a capacitor (2.1) arranged between two electrodes (2.2) of the ignition device (2) is measured
Implementation Method 2
ignition sparks are generated by an ignition device (2) located in the combustion chamber (1)
Implementation Method 3
combustion of the fuel gas-air mixture containing at least 20% hydrogen by volume
Implementation Method 4
combustion chamber (1) filled with air
Data Source
Figure 1~3
AI summary
The invention relates to a method for operating a burner device. Air is conveyed into a combustion chamber (1); ignition sparks are generated using an ignition device (2) arranged in the combustion chamber (1), which is flooded with air; a combustible gas is added to the air while the ignition sparks are continuously generated; and in the period of time which starts before the ignition sparks are generated and ends after the combustible gas is added, electric voltage values are measured on the ignition device (2). According to the invention, the voltage values which are measured in the aforementioned period of time and which form a voltage curve are analyzed in order to detect a formation of flames, beginning when the combustible gas-air mixture which contains at least 20 vol.% of hydrogen is combusted.