Metal Mesh Burner Head Structure 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 high nitrogen oxide emissions due to low airflow resistance and fluctuating wind speeds.
Innovation Solution
A burner head design featuring a metal mesh welded to a fire partition plate with strategically placed weld spots and partition members to increase airflow resistance and stabilize flames, combined with a fire grate structure that disperses airflow uniformly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If metal mesh is used to form fine combustion holes, then combustion area is increased, but airflow resistance becomes too small causing flame separation and unstable combustion
Solution Approach 1:
The burner head is segmented into multiple partition members that divide the combustion area into multiple fire ports. Each partition member creates localized high-resistance zones while collectively providing sufficient combustion area. The metal mesh is further segmented into multiple layers with different mesh sizes, creating a gradient resistance structure that stabilizes flames across the entire combustion area.
Solution Approach 2:
Different regions of the burner head are given different properties: the metal mesh has varying mesh sizes in different areas, partition members are strategically placed at specific locations, and weld spots are concentrated at key positions. This creates local high-resistance zones where needed while maintaining overall combustion area, preventing flame separation at critical locations.
2Adaptability or versatility
If wind speed fluctuates, then airflow dynamics change, but low resistance metal mesh causes flame separation and fire failure
Solution Approach 1:
The burner design incorporates dynamic adaptability through its multi-layer metal mesh structure with varying mesh sizes. When wind speed fluctuates, the gradient resistance structure allows the system to automatically adapt: finer mesh layers resist high-velocity fluctuations while coarser layers maintain overall airflow. The partition members and weld spots create stable anchor zones that prevent flame separation under varying wind conditions.
3Reliability
If metal mesh resistance is increased to prevent flame separation, then combustion stability improves, but manufacturing complexity increases
Solution Approach 1:
Instead of changing the fundamental structure, the invention optimizes parameters of existing components: metal mesh mesh size, layer spacing, partition member dimensions and positioning, and weld spot locations. These parameter optimizations achieve high resistance and stable combustion using standard manufacturing processes, avoiding excessive structural complexity while maintaining reliability.
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
Stabilizes flames, reduces nitrogen oxide emissions, and enhances combustion efficiency by ensuring uniform airflow and flame connection, preventing flame separation and failure.
Implementation Method 1
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 and fire failure
Implementation Method 2
the metal mesh is welded to the first weld position at the first weld spot
Implementation Method 3
when the airflow ejected from the airflow channel burns at the metal mesh
Data Source
Figure 1
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AI summary
The present invention discloses a burner head, a fire grate and a gas device. 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 is 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.