Hydrogen Dark Radiant Tube Burner With Flashback-Safe Air Mixing
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Solution Overview
Problem
Existing radiant heaters emit pollutants such as carbon monoxide, carbon dioxide, and hydrocarbons, despite achieving high efficiency, necessitating further reduction in emissions while maintaining efficiency.
Innovation Solution
Utilizing a hydrogen-based fuel source exclusively for the dark radiator, with a blower connected to an ejector, and employing a high air-fuel ratio to control flame temperature and mix hydrogen with combustion air outside the blower, eliminating the need for premixing chambers and flame flashback prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If natural gas or LPG is used as fuel, then the heater achieves high efficiency, but carbon-containing pollutants (carbon monoxide, carbon dioxide, hydrocarbons) are emitted
Solution Approach 1:
The patent changes the chemical composition parameter of the fuel from carbon-containing gases (natural gas, LPG) to hydrogen, which contains no carbon. This fundamental parameter change eliminates the source of carbon-containing pollutants while maintaining the energy release capability through hydrogen combustion, resolving the contradiction between efficiency and pollutant emissions.
2Object-generated harmful factors
If hydrogen is used as fuel exclusively, then carbon-containing pollutant emissions are eliminated, but flame temperature increases leading to nitrogen oxide formation and material thermal impairment
Solution Approach 1:
The patent introduces air as an intermediary substance that mixes with hydrogen before combustion. By controlling the air-to-hydrogen ratio to be higher than the stoichiometric ratio, the air acts as a temperature moderating agent that absorbs excess heat and prevents flame temperature from reaching the threshold for nitrogen oxide formation and material thermal impairment.
Solution Approach 2:
The patent changes the combustion parameter by using a high air-to-fuel ratio (higher than stoichiometric) instead of the conventional ratio. This parameter change controls the flame temperature to remain below the limit temperatures for nitrogen oxide formation and material thermal impairment, resolving the contradiction between using hydrogen and preventing its harmful effects.
3Manufacturing precision
If hydrogen and combustion air are mixed inside the blower, then the mixing ratio can be controlled, but the blower material is exposed to flame flashback risk and thermal impairment
Solution Approach 1:
The patent segments the mixing process from the blower function. The blower is responsible only for supplying air, while the mixing of hydrogen and air occurs in a separate mixing chamber. This segmentation protects the blower from flame flashback and thermal exposure while still achieving controlled mixing ratios through the design of the mixing chamber and ejector system.
Solution Approach 2:
The patent introduces a mixing chamber as an intermediary component between the hydrogen source and the blower. This intermediary allows the hydrogen and air to mix in a controlled environment away from the blower, preventing flame flashback to the blower while maintaining precise mixing ratio control through the ejector mechanism.
4Loss of energy
If a premixing chamber is used to mix fuel gas and air, then complete combustion is achieved, but the device complexity increases and flame flashback risk arises
Solution Approach 1:
The patent extracts the mixing function from a dedicated premixing chamber and integrates it into the existing blower system through an ejector mechanism. The high-velocity air flow from the blower creates a low-pressure zone that draws hydrogen in and mixes it thoroughly, achieving complete combustion without requiring a separate complex premixing chamber structure.
Solution Approach 2:
The patent makes the blower multi-functional by having it perform both air supply and fuel-air mixing functions. The blower's air flow serves dual purposes: providing combustion air and creating the ejector effect for hydrogen induction and mixing. This eliminates the need for separate premixing equipment, reducing device complexity 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
Achieves reduced pollutant emissions by using hydrogen combustion, maintaining efficiency, and preventing flame flashback, thus minimizing nitrogen oxide formation and thermal impairment.
Implementation Method 1
A flame is generated by burning a mixture of fuel gas and air within the burner
Implementation Method 2
the burner is configured so that part of the air supplied by the blower is directed to the mixer and another part of the air is directed to a secondary air duct, in order to supply a portion of the combustion air to the flame without fuel
Implementation Method 3
The flame heats the radiant tube uniformly, generating thermal radiation that is emitted onto the area to be heated
Implementation Method 4
The exhaust gases produced by combustion are removed from the radiant tube by a fan
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a dark radiator, comprising a burner (1, 5, 6, 7), a blower (2) and a radiant tube (3) connected to an exhaust gas discharge line, wherein the burner (1) is connected to a fuel gas supply, wherein the blower (2) is configured to supply combustion air to the burner (1), wherein the burner (1) is configured to emit a flame into the radiant tube (3, 3'), and wherein the fuel gas supply is connected to a hydrogen source.