Metal Mesh Burner Head Welding for Stable Low-NOx Combustion
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Solution Overview
Problem
Existing burners with metal mesh fire grates experience unstable combustion, flame separation, and nitrogen oxide emissions due to low resistance of metal mesh holes, which are exacerbated by fluctuating wind speeds.
Innovation Solution
A burner head design featuring a metal mesh welded at specific weld spots on a fire partition plate, creating a gradual resistance change that stabilizes flames and enhances airflow dispersion, combined with a fire grate structure that includes airflow channels and partition members to improve combustion stability and reduce nitrogen oxide emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If metal mesh is used to form fine combustion holes, then the burning area is increased and airflow is dispersed, but the resistance is too small causing flame separation and fire failure
Solution Approach 1:
The patent applies local quality by creating weld spots at specific locations on the metal mesh where the mesh is welded to the fire partition plate. These weld spots create localized areas of increased resistance that serve as flame stabilization points, while the rest of the metal mesh maintains its fine pore structure for adequate burning area and airflow dispersion.
2Adaptability or versatility
If wind speed fluctuates, then airflow dynamics change, but low resistance causes flame separation and fire failure
Solution Approach 1:
The patent changes the resistance parameter of the metal mesh by introducing weld spots that create localized high-resistance areas. This modification allows the system to adapt to varying wind speeds by providing stable flame anchoring points that prevent flame separation under fluctuating airflow conditions.
3Reliability
If metal mesh resistance is increased to prevent flame separation, then combustion stability improves, but burning area decreases and airflow dispersion is reduced
Solution Approach 1:
The patent resolves this contradiction by applying the local quality principle, where only specific localized areas (weld spots) of the metal mesh have increased resistance, while the majority of the mesh maintains its original fine pore structure. This ensures adequate burning area and airflow dispersion are preserved while still providing sufficient resistance at critical locations to prevent flame separation.
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 combustion, reduces flame separation, and lowers nitrogen oxide emissions by increasing airflow resistance and uniformity, ensuring complete combustion and improved flame stability.
Implementation Method 1
the metal mesh is welded to the first weld position at the first weld spot
Implementation Method 2
the resistance of the metal mesh fire holes is relatively small, when the wind speed of the fan fluctuates, it is easy to cause flame separation
Implementation Method 3
improve combustion stability and combustion sufficiency, and reduce nitrogen oxide emissions
Data Source
AI summary
A burner head, a fire grate and a gas device are provided. The burner head includes a burner cover and a metal mesh. The burner cover includes a fire partition plate. The fire partition plate is provided with a plurality of fire ports provided at intervals. The fire partition plate is configured to form a partition member between two adjacent fire ports. At least part of the partition member are provided with a first weld position. The metal mesh is provided at the burner cover and is configured to cover the plurality of fire ports. The metal mesh is provided with a first weld spot corresponding to the first weld position. The metal mesh is welded to the first weld position at the first weld spot.