Conical Premixed Burner Combustion Head for Thermal Power Adjustment

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Solution Overview

Problem

Current premixed burners face limitations in thermal power adjustment range, noise, vibration, and durability due to restricted geometry and high surface temperature of combustion heads, which also result in suboptimal flame conformation and increased NOx emissions.

Innovation Solution

A combustion head with a conical surface for fuel gas-air mixture distribution, enabling continuous thermal power adjustment from 5 to 100% and stable flame formation, suitable for flame inversion chambers, using sheet-shaped metal plates with evenly sized openings for efficient heat exchange and reduced self-heating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional combustion heads are used, then the burner can operate at high thermal power, but the combustion head experiences high surface temperature leading to limited duration and durability

Engineering Contradiction:

Improvethermal powerVSAvoidcombustion head duration

Core Design Contradiction:

PowerVSDuration of action of stationary object

Solution Approach 1:

The combustion head is divided into multiple segments or zones with different geometries. The distribution chamber is separated from the combustion chamber, and the walls are divided into regions with different opening densities. This segmentation allows different parts to handle thermal loads differently, extending overall durability while maintaining high power output.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the combustion head are given different local properties. The distribution walls have varying opening densities in different zones, and the combustion chamber has non-uniform cross-sectional areas. This local quality variation optimizes heat distribution and reduces peak temperatures in critical areas, extending component life.

Inventive Principle:

Principle #3Local quality

2Device complexity

If conventional combustion heads with restricted geometry are used, then the structure is simple, but the thermal power adjustment range is limited and noise and vibration cannot be effectively reduced

Engineering Contradiction:

Improvecombustion head geometryVSAvoidthermal power adjustment range

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The combustion head geometry is designed to dynamically adapt to different operating conditions. The distribution chamber and combustion chamber dimensions are optimized to work effectively across a wide range of thermal powers (5-100% adjustment range), and the opening densities are configured to maintain stable combustion characteristics under varying loads, reducing noise and vibration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The design transitions from simple two-dimensional cross-sections to three-dimensional optimized geometries. The distribution chamber and combustion chamber have varying cross-sectional areas along their lengths, creating complex 3D flow patterns that improve combustion stability and noise reduction across the full adjustment range.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Volume of moving object

If conventional combustion heads are used, then the structure is compact, but the flame conformation is suboptimal leading to increased NOx emissions

Engineering Contradiction:

Improvecombustion chamber sizeVSAvoidNOx emissions

Core Design Contradiction:

Volume of moving objectVSObject-generated harmful factors

Solution Approach 1:

The combustion chamber is designed with curved surfaces and varying cross-sectional areas rather than simple cylindrical or rectangular shapes. This curvature optimization creates improved flame conformation that enhances combustion efficiency and reduces NOx emissions within a compact volume.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 solution provides a stable, long-lasting combustion head capable of handling high thermal powers without noise or resonance, optimizing heat exchange and reducing NOx emissions by maintaining a high combustion surface area and minimizing self-heating of the combustion head.

Implementation Method 1

The distribution wall (12) of the main body (11) has conical shape... through which the fuel gas - air mixture (15) coming from the distribution chamber (14) flows

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

a stable flame in the various burnt thermal flow conditions... where the igniting of the fuel gas - air mixture occurs and where the flame (17) is formed

Methodology Applied

Scientific EffectCombustion: Combustion

Data Source

PatentEP2713105B1Premixed burner provided with gas combustion head

Publication Date: 2017.04.12 SYST POLSKA SP ZO O

AI summary

Gas combustion head (10) for premixed burners, which has a main body (11) adapted to receive a fuel gas - air mixture (15), and on such main body (11) a conical surface (12) is obtained having a series of openings (13), through which the fuel gas - air mixture (15) flows from an internal distribution chamber (14) of said main body (11) to a combustion area (16) outside said main body (11), in a manner so as to develop a longitudinal flame (17).