Hydrogen Dark Radiator Combustion for Low-Emission Heat Output
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Solution Overview
Problem
Existing dark radiators emit harmful substances such as carbon monoxide, carbon dioxide, and hydrocarbons, despite achieving high effectiveness in heating, necessitating further reduction in emissions while maintaining efficiency.
Innovation Solution
Utilizing hydrogen as the exclusive fuel source, employing a fan-connected ejector for a defined hydrogen/combustion air mixture, and incorporating a combustion air mixing chamber to reduce flame temperature and oxygen content, along with a secondary burner for post-treatment of exhaust gases, thereby minimizing harmful substance emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If natural gas or liquefied gas is used as fuel, then the dark radiator achieves high heating effectiveness, but harmful substances such as carbon monoxide, carbon dioxide, and hydrocarbons are emitted
Solution Approach 1:
The patent changes the chemical composition parameter of the fuel from carbon-containing gases (natural gas, liquefied gas) to hydrogen, which contains no carbon. This fundamental parameter change eliminates the formation of carbon-based harmful emissions while maintaining the heating effectiveness through hydrogen combustion.
Solution Approach 2:
The patent converts the challenge of controlling flame temperature (which can be very high with hydrogen) into a benefit by using the high flame temperature to achieve complete combustion and then controlling the air excess to ensure temperatures remain below nitrogen oxide formation thresholds, turning a potential harm into a controlled beneficial process.
2Object-generated harmful factors
If the fan supplies sufficient combustion air to achieve complete combustion, then harmful substance emissions are reduced, but the flame temperature increases which may exceed material boundary temperatures
Solution Approach 1:
The patent changes the air-to-fuel ratio parameter by supplying an air excess (air number) of 2.5 to 3, which is higher than the stoichiometric ratio. This parameter change achieves two objectives: complete combustion of hydrogen (eliminating harmful emissions) and control of flame temperature below the boundary temperatures of nitrogen oxide formation and radiant tube materials.
3Object-generated harmful factors
If a mixing chamber and flashback barrier are used to control the fuel gas/air mixture, then complete combustion is achieved, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the flashback barrier component from the burner system. By using hydrogen as fuel with a controlled air excess of 2.5 to 3, the system achieves complete combustion without requiring the flashback barrier that would be necessary with traditional carbon-containing fuels, thereby simplifying the device structure.
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 a significant reduction in harmful substance emissions, including nitrogen oxides, while maintaining heat efficiency by using hydrogen combustion with controlled air excess and exhaust gas recirculation, eliminating the need for flame flashback prevention mechanisms.
Implementation Method 1
the fan is set up for supplying combustion air to the burner... The exhaust gases that result from combustion are removed from the radiant tube using the fan
Implementation Method 2
By means of combustion of a mixture of fuel gas and air within the burner, a flame is generated
Implementation Method 3
The radiant tube is uniformly heated by the flame and generates a heat radiation that is emitted to a region to be heated
Implementation Method 4
the fan is connected to an ejector having a suction connector connected to the hydrogen supply, wherein the combustion air drawn in by the fan serves as a driving medium, so that a hydrogen/combustion air mixture is supplied to the burner by the fan
Data Source
AI summary
A dark radiator includes a burner, a fan and a radiant tube which is connected to an exhaust gas discharge line, wherein the burner is connected to a fuel gas supply, wherein the fan is designed to supply the burner with combustion air, wherein the burner is designed to output a flame into the radiant tube, wherein the fuel gas supply is connected to a hydrogen source.