Dual-Plate Burner Blocking Structure for Flame Flashback
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Solution Overview
Problem
Existing burner devices for gaseous fuel-air mixtures are prone to flashback, which can cause significant damage by allowing flames to travel upstream and destabilize combustion.
Innovation Solution
A burner device with a blocking device comprising two adjacent blocking plates forming a narrow gap through which the fuel-air mixture flows, deflecting it twice to prevent flashback, and a burner plate with perforations for combustion, ensuring the mixture flows through and is cooled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking device is added to prevent flashback, then safety is improved, but device complexity increases
Solution Approach 1:
The blocking device is segmented into multiple blocking plates (first blocking plate and second blocking plate) arranged in series. Each plate has flow openings that allow controlled fuel-air mixture passage while blocking flame propagation. This segmentation enables effective flashback prevention through multiple barriers without requiring a single complex structure.
Solution Approach 2:
The blocking plates are nested within the burner device structure, with the first blocking plate positioned upstream of the burner plate and the second blocking plate downstream. The flow openings in these plates are nested within the overall flow path, creating a compact multi-layer blocking structure that integrates seamlessly into the existing burner design.
2Volume of moving object
If blocking plates are placed close together to reduce space, then device compactness is improved, but flow resistance increases
Solution Approach 1:
The blocking plates have different configurations at different locations: the first blocking plate has flow openings optimized for upstream flow, while the second blocking plate has flow openings optimized for downstream flow. The gap between plates is minimized locally where space is constrained, while maintaining adequate flow passage areas to minimize resistance. This localized optimization balances compactness with flow efficiency.
Solution Approach 2:
Instead of increasing the gap between blocking plates to reduce flow resistance, the design optimizes the flow openings in the lateral and vertical dimensions. The flow openings are positioned and sized to maximize passage area within the constrained gap, effectively using multiple spatial dimensions to maintain low resistance while keeping the device compact.
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 effectively prevents flashback, maintaining stable combustion and protecting the burner device from heat radiation and damage, while allowing efficient fuel-air mixture flow.
Implementation Method 1
A burner device with a blocking device comprising two adjacent blocking plates forming a narrow gap through which the fuel-air mixture flows, deflecting it twice to prevent flashback
Implementation Method 2
a burner plate with perforations for combustion, ensuring the mixture flows through and is cooled
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention is based on a burner device for combusting a, in particular gaseous, fuel-air mixture stream, comprising a burner plate with a plurality of third flow openings for the fuel-air mixture stream for forming and maintaining combustion flames, and a blocking device adjacent upstream of the burner plate with a plurality of first and second flow openings for the fuel-air mixture stream for blocking flashback. It is proposed that the blocking device comprise a first blocking plate and a second blocking plate adjacent downstream of the first blocking plate, wherein the first flow openings are formed in the first blocking plate and the second flow openings are formed in the second blocking plate. The first blocking plate and the second blocking plate are arranged substantially evenly spaced from one another and form a flow-through gap between them.The gap has a substantially constant clear gap height S, wherein the height S is at most 2 millimeters, preferably at most 1 millimeter, particularly preferably in the range 0.2 millimeters to 0.7 millimeters.