Multi-Tube Burner Mixing Layout for Low-Flashback Combustion
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Solution Overview
Problem
Existing gaseous burner systems face issues with flashback risk, inefficient mixing of fuel and air, and structural complexity, leading to reduced performance and efficiency due to high turbulence and pressure drop.
Innovation Solution
A multi-tube burner system with an air supply plenum, multi-tube burner, and combustor, featuring in-line fuel injection and distributed air and fuel mixing, along with effusion cooling, to enhance mixing efficiency and reduce flashback risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fuel is injected at high velocities in a relatively lower velocity air stream, then mixing efficiency is improved, but flashback risk increases
Solution Approach 1:
The burner system divides the air stream into multiple separate air streams using multiple air foils, each creating its own vortex. The fuel is injected into these segmented air streams rather than a single high-velocity stream, allowing for effective mixing while reducing the risk of flashback by distributing the fuel across multiple lower-velocity zones
Solution Approach 2:
Multiple air foils are introduced as intermediary structures that generate vortex flows to enhance fuel-air mixing. These air foils act as mediators between the fuel injection system and the combustion chamber, creating controlled turbulence and mixing zones that improve combustion efficiency while maintaining flashback safety through distributed flow patterns
2Stability of the object's composition
If air foils or similar structures are used to guide air and form swirling flow field, then flame stabilization is improved, but pressure drop increases
Solution Approach 1:
Air foils are strategically positioned at specific locations where local flow conditions require vortex generation for flame stabilization. Rather than using a single large structure throughout the system, multiple smaller air foils are placed locally to create swirling flows only where needed, minimizing overall pressure drop while achieving flame stability in critical zones
3Temperature
If separate air and fuel plenums are created for combustion and cooling, then thermal management is improved, but structural complexity increases
Solution Approach 1:
The burner system integrates the air plenum and fuel plenum into a unified structure where both air and fuel distribution systems share common structural elements and mounting arrangements. This merging approach allows for separate combustion and cooling functions to be achieved while reducing overall structural complexity through shared components and streamlined design
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 system achieves efficient fuel-air mixing, reduces flashback risk, and improves structural integrity by minimizing pressure drop and overheating, while allowing for flexible fuel supply and enhanced flame stability.
Implementation Method 1
The air supply plenum is configured to supply combustion air to the multi-tube burner via a set of cylindrical air holes formed on an inlet surface of the multi-tube burner
Implementation Method 2
The mixing section facilitates mixing of the combustion air and the fuel due to in-line injection
Implementation Method 3
The combustor combusts the combustion air and the fuel mixture to form one or more hot gas products
Implementation Method 4
effusion cooling
Implementation Method 5
cooling the parts at the same time
Data Source
AI summary
A multi-tube burner system for efficient mixing of fuel and air for combustion is disclosed. The multi-tube burner system includes an air supply plenum, a multi-tube burner, and a combustor. Further, the multi-tube burner includes a set of tubes including the air supply section to receive combustion air and supply the received combustion air to a mixing section. Furthermore, the multi-tube burner includes a set of fuel pipes to receive fuel from a set of fuel inlets and supply the received fuel to a set of fuel plenums. Furthermore, a pair of fuel receiving channels receive the fuel from the set of fuel plenums and a fuel injector pin injects the received fuel from the pair of fuel receiving channels to the mixing section. Further, a set of mixing holes allow egression of the combustion air and the fuel mixture from the mixing section to the combustor.