Dimpled Coanda Flare Burner Reducing Flame Length and Noise
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Solution Overview
Problem
Conventional Coanda tipped flare burners produce long flames and high noise levels, which are undesirable as they require more space and can damage equipment, and are often noisy.
Innovation Solution
A flare burner with a gas deflector featuring a rounded outer surface with a plurality of dimples to increase mixing between waste gas and ambient air, reducing flame length and noise by enhancing gas velocity and mixing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a Coanda tip is used to minimize smoke production, then smokeless combustion is achieved, but flame length increases and noise levels increase
Solution Approach 1:
The Coanda tip surface is segmented into multiple dimples rather than being smooth, creating localized mixing zones that enhance combustion efficiency and reduce flame length while maintaining smokeless operation
Solution Approach 2:
The dimples create localized regions of enhanced turbulence and mixing on the Coanda tip surface, concentrating combustion activity in specific areas to shorten overall flame length while maintaining effective smokeless combustion
2Object-generated harmful factors
If a Coanda tip is used to minimize smoke production, then smokeless combustion is achieved, but noise levels increase
Solution Approach 1:
The segmented dimpled surface distributes combustion activity across multiple localized zones, preventing concentrated noise generation and reducing overall noise levels while maintaining smokeless combustion
Solution Approach 2:
Localized mixing zones created by dimples optimize combustion efficiency in specific areas, reducing turbulent noise generation while maintaining effective smokeless operation
3Reliability
If a long flame is produced, then complete combustion is achieved, but more space is required and equipment may be damaged
Solution Approach 1:
The dimpled surface segments the combustion process into multiple localized reaction zones along the Coanda tip, achieving complete combustion within a compact space and reducing flame length
Solution Approach 2:
Enhanced local mixing at dimple locations creates efficient combustion zones that achieve complete combustion in a shorter overall flame length, reducing space requirements and preventing equipment damage
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 produces a shorter, more stable flame and reduces noise levels by up to 22%, addressing the issues of space requirements and noise pollution.
Implementation Method 1
Coanda tips have been used in flares with high flow rates and pressures to cause the adherence of the waste gas to the surface. The negative pressure and viscous forces caused by the Coanda effect cause the fluid to be drawn against the surface in a relatively thin film
Implementation Method 2
a plurality of dimples for increasing the mixing between the waste gas and oxygen in the ambient air
Data Source
AI summary
A flare gas burner and a process for disposing of a waste gas using such a burner. The burner has a rounded outer surface that includes a plurality of dimples. The dimples increase the mixing of the waste gas and ambient air prior to combustion. The flare gas burner may have a diameter of 0.61 m and between 300 and 400 dimples. The flare gas burner may comprise a cast material.