Cylindrical Flame Body Burner for Hydrogen Flashback Prevention
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Solution Overview
Problem
Existing burner devices face challenges with flashback risks and efficiency when using hydrogen-containing fuels, particularly in heating systems and service water supply systems, due to the higher flame propagation speed of hydrogen compared to conventional fuels, and the use of flame arresters compromises efficiency and space.
Innovation Solution
A burner device design featuring a cylindrically shaped flame body with a central air flow channel and a fuel supply device that separates the mixing region from the flow channel, ensuring a homogeneous air-fuel mixture and reducing the volume of the air-fuel mixture within the burner, thereby minimizing flashback risks and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flame arresting devices are installed to prevent flashback, then safety is improved, but installation space increases and mixing efficiency deteriorates
Solution Approach 1:
The harmful element (flame arrester) is completely removed from the system. Instead of adding a flame arrester to prevent flashback, the patent redesigns the mixing area geometry and air-fuel mixture formation process to inherently prevent flashback conditions, extracting the safety function from a separate component to the overall system design.
Solution Approach 2:
The patent changes the physical parameters of the mixing area, specifically reducing its volume and optimizing the air-fuel mixture composition. By controlling the mixture to be leaner and reducing the space where flammable mixtures can form, the flashback risk is eliminated without requiring additional safety components.
2Reliability
If flame arresting devices are installed to prevent flashback, then safety is improved, but mixing efficiency deteriorates due to additional flow resistance
Solution Approach 1:
The harmful element (flame arrester) that causes flow resistance is completely removed. The safety function is achieved through geometric design of the mixing area and control of air-fuel mixture parameters, eliminating the need for flow-resistance-inducing components.
Solution Approach 2:
The patent optimizes the air-fuel mixture parameters (composition, velocity, temperature) and mixing area geometry to achieve both safety and efficient mixing. By controlling the mixture to be leaner and optimizing flow patterns, the design achieves safety without compromising mixing efficiency.
3Productivity
If supply pressures are increased to compensate for flow resistance, then mixing efficiency is maintained, but energy consumption increases
Solution Approach 1:
The source of flow resistance (flame arrester) is removed, eliminating the need for additional pressure compensation. The system maintains mixing efficiency through optimized geometry and flow patterns rather than increased energy input.
Solution Approach 2:
The patent optimizes the flow parameters and mixing area design to achieve efficient mixing at lower supply pressures. By changing the geometric parameters and flow conditions rather than increasing pressure, energy consumption is reduced while maintaining productivity.
4Productivity
If burner devices are designed for conventional fossil fuels, then they operate efficiently with those fuels, but they are not suitable for hydrogen-containing fuels due to higher flame propagation speed
Solution Approach 1:
The burner device is designed with universal adaptability to handle different fuel types including hydrogen-containing fuels and conventional fossil fuels. The mixing area geometry and air-fuel mixture formation process are optimized to accommodate the higher flame propagation speed of hydrogen while maintaining efficient combustion for all fuel types.
Solution Approach 2:
The patent adjusts the operating parameters (air-fuel ratio, mixing area volume, flow velocities) to accommodate hydrogen-containing fuels with their higher flame propagation speed. By changing these parameters, the burner achieves both safety (flashback prevention) and efficient combustion across different fuel types.
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 design achieves stable and efficient combustion with a reduced risk of flashback, allowing for safe and efficient operation with hydrogen-containing fuels without the need for flame arresters, and can be integrated into heat generators and heating systems for effective thermal energy transfer.
Implementation Method 1
a flow channel running centrally in the interior along a longitudinal central axis of the flame body for supplying air into the mixing area
Implementation Method 2
a fuel supply device arranged at least partially in the interior for introducing fuel into a mixing area for mixing the fuel with air to form an air-fuel mixture
Implementation Method 3
the fuel supply device surrounds the flow channel at least in the radial direction, in particular completely surrounds the flow channel
Implementation Method 4
for supplying heat energy by combustion of an air-fuel mixture, wherein the fuel in particular contains hydrogen
Data Source
Figure 1~2B
Figure 3A~5B
AI summary
The invention provides a burner device 100 for supplying heat energy by combustion of an air-fuel mixture, wherein the fuel B contains, in particular, hydrogen. The burner device 100 comprises a generally cylindrical flame body 1, which has an outer combustion surface 17 formed on a cylindrical shell of the flame body 1, on which the combustion of the air-fuel mixture takes place, wherein the combustion surface 17 is connected via through-openings 16 in the cylindrical shell to an interior space 11 at least partially enclosed by the flame body 1. Furthermore, the burner device 100 comprises a fuel supply device 2 arranged at least partially in the interior space 11 for introducing fuel into a mixing area 15 for mixing the fuel B with air L to form the air-fuel mixture, wherein the mixing area 15 is formed in the interior space 11 between the fuel supply device 2 and the flame body 1.and a flow channel 3 running centrally in the interior 11 along a longitudinal central axis 14 of the flame body 1 for supplying air into the mixing area 15, which is at least partially enclosed by the fuel supply device 2.