Compact Flame-Curtain Burner With Distributed Flow Paths

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Solution Overview

Problem

Existing post-mix burners face challenges in generating homogeneous flame curtains due to preferential fluid flow paths, which are difficult to address in compact and lightweight designs, and conventional methods like increased pressure loss or buffer volumes are impractical or costly.

Innovation Solution

A linear post-mix burner with a central dividing wall and separate inlet and outlet compartments, featuring distributed through passages and ejection openings, ensures even fluid distribution and minimizes preferential flow paths, allowing for compact and efficient flame generation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional post-mix burners are used to generate flame curtains, then flame treatment can be achieved, but preferential fluid flow paths cause non-homogeneous flame distribution along the burner length

Engineering Contradiction:
Improveflame homogeneityVSAvoidflow path structure
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The burner is divided into multiple independent flow paths separated by dividing walls. Each flow path contains its own fuel and oxidant channels that are distributed along the burner length, preventing preferential flow and ensuring homogeneous flame distribution. The segmentation of the combustion chamber into multiple zones with controlled fluid distribution eliminates the non-homogeneous flame patterns observed in conventional single-channel designs.

Inventive Principle:
Principle #1Segmentation

2Manufacturing precision

If buffer volumes are increased to reduce preferential flow paths, then fluid distribution improves, but burner size and weight increase

Engineering Contradiction:
Improvefluid distribution uniformityVSAvoidburner volume
Core Design Contradiction:
Manufacturing precisionVSVolume of moving object

Solution Approach 1:

Instead of increasing buffer volume in the traditional longitudinal direction, the invention distributes fluid flow paths across multiple spatial dimensions by incorporating dividing walls that create parallel channels. The fuel and oxidant are distributed through these multi-dimensional pathways, achieving uniform fluid distribution without requiring excessive buffer volume. This dimensional approach allows compact burner design while maintaining homogeneous flame output.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Manufacturing precision

If pressure loss is increased to eliminate preferential flow paths, then fluid distribution improves, but energy efficiency decreases

Engineering Contradiction:
Improveflow path uniformityVSAvoidpressure loss
Core Design Contradiction:
Manufacturing precisionVSLoss of energy

Solution Approach 1:

The burner incorporates locally optimized flow channels with specific geometric features such as tapered sections and strategically positioned openings that regulate fluid distribution without requiring high pressure losses. Each local section of the burner is designed with quality-controlled channel dimensions and orientations that promote uniform flow distribution. This local quality approach achieves homogeneous flame patterns while minimizing overall energy loss compared to global pressure increase methods.

Inventive Principle:
Principle #3Local quality

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 burner generates a substantially homogeneous flame curtain suitable for various treatment processes, including glass finishing and mechanical property enhancement, while maintaining a compact and lightweight design.

Implementation Method 1

Burners are devices which are used to combine a fuel and an oxidant for the combustion of said fuel by means of the oxidant

Methodology Applied
Scientific EffectCombustion: Combustion

Implementation Method 2

A first set of multiple first through passages is provided in the first separation plate between the first inlet compartment and the first outlet compartment... These first through passages fluidly connect the first inlet compartment to the first outlet compartment

Methodology Applied
Scientific EffectFluid flow through passages:

Data Source

PatentUS12455074B2Compact flame-curtain burner
Publication Date: 2025.10.28 LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
  • US12455074B2 patent drawing
  • US12455074B2 patent drawing
  • US12455074B2 patent drawing

AI summary

Post-mix burner and use of same for generating a flame curtain, the burner having a longitudinal central dividing wall (5) terminating in a wall head (7) towards the burner top (4), an oxidant inlet compartment (102) and an oxidant outlet compartment (103) on a first side of the central wall (5), a fuel inlet compartment (202) and a fuel outlet compartment on the opposite side of the central wall (5); the wall head (7) presenting a first set of oxidant outlet passages (107) and a second set of fuel outlet passages (207) terminating respectively in first oxidant ejection openings (100) and second fuel ejection openings (200) in an ejection surface (10) at the burner top (4), the oxidant and fuel ejection openings (100, 200) each extending in the longitudinal direction along the ejection surface (10).