Gas Burner Membrane Hole Patterning for Hydrogen Flashback Control
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Solution Overview
Problem
Conventional sheet metal piercing techniques for forming holes in gas burner membranes are limited to sizes at least 1.5 times the material thickness, leading to high failure rates and restricted hole density, and are inadequate for gases like hydrogen, which pose a risk of flashback due to flame speed imbalance.
Innovation Solution
Forming holes in the burner membrane using laser cutting, water jet cutting, electron beam drilling, or chemical etching to achieve diameters less than 1.3 times the material thickness, with patterns suitable for hydrogen-rich gases, reducing the risk of flashback and enhancing combustion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional sheet metal piercing techniques are used to form holes in the burner membrane, then the manufacturing process is simple and cost-effective, but the hole diameter is limited to at least 1.5 times the material thickness, resulting in high failure rates and restricted hole density
Solution Approach 1:
The patent replaces traditional mechanical sheet metal piercing techniques with laser cutting technology. This substitution enables precise control of hole diameters down to 0.1mm while eliminating the constraint of minimum hole size being 1.5 times material thickness, thereby resolving the contradiction between manufacturing simplicity and hole size precision.
Solution Approach 2:
The patent changes the manufacturing parameter from mechanical piercing (with minimum hole size constraint) to laser cutting (with controllable hole size down to 0.1mm). This parameter change allows holes to be formed at diameters less than 1.3 times material thickness without high failure rates, improving both precision and reliability.
2Productivity
If traditional sheet metal piercing techniques are used, then the manufacturing process is straightforward, but the density of through holes is limited, reducing combustion efficiency
Solution Approach 1:
The patent replaces mechanical piercing with laser cutting, which can rapidly form high-density patterns of small holes (0.1-1mm diameter) without the tooling constraints of mechanical methods. This increases hole density from limited traditional patterns to thousands of holes per square meter, improving combustion efficiency while maintaining ease of manufacture through automated laser processing.
3Reliability
If larger holes are used in the burner membrane, then the manufacturing process is simpler, but flashback risk increases due to flame speed imbalance with hydrogen-rich gases
Solution Approach 1:
The patent changes the hole diameter parameter from traditional large sizes (1.5+ times material thickness) to small sizes (0.1-1mm, less than 1.3 times material thickness). This parameter change reduces flashback risk with hydrogen-rich gases by better matching the flame speed characteristics, while laser cutting technology makes manufacturing these small precision holes straightforward and reliable.
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 method allows for the production of small-diameter holes in gas burner membranes, effectively reducing the risk of flashback and ensuring efficient combustion with hydrogen-rich fuels, while maintaining structural integrity.
Implementation Method 1
the holes being formed by laser cutting a required pattern of holes in the sheet of material
Implementation Method 2
the holes being formed by water jet cutting a required pattern of holes in the sheet of material
Implementation Method 3
the holes being formed by chemical etching a required pattern of holes in the sheet of material
Data Source
AI summary
A method of forming a gas burner membrane. The method comprises forming a plurality of holes in a sheet of material. The holes are formed by laser cutting a required pattern of holes in the sheet of material.