High-Emissivity Flare Tip Coating for Wind-Driven Heat Protection
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Solution Overview
Problem
Flare tips and stacks are prone to failure due to high temperatures and wind-induced flame deviation, leading to structural damage and environmental hazards, with existing solutions requiring additional energy for cooling and offering limited thermal protection.
Innovation Solution
Application of a high emissivity thermal protective layer on flare tips and shield assemblies, which includes a center flare tip assembly and flare tip shield assembly, coated with a high emissivity thermal modification layer to enhance thermal radiation and minimize metal temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If dynamic cooling measures (water, steam, or air cooling) are used to cool the stacks and flare tips, then the temperature of metal components is reduced to avoid failure, but additional energy is required to circulate the cooling medium
Solution Approach 1:
The patent applies a sacrificial thermal spray coating that can be easily reapplied. Instead of investing in complex dynamic cooling systems requiring continuous energy input, the solution uses a consumable coating that protects the metal substrate and can be replenished when worn, transforming a continuous energy expense into a periodic maintenance task
Solution Approach 2:
The patent replaces the mechanical dynamic cooling system (pumps, circulation equipment) with a passive thermal barrier coating. The coating provides thermal protection through its material properties rather than active cooling mechanisms, eliminating the need for energy-consuming circulation systems
2Reliability
If low emissivity coatings are used on flare tips, then longer service life and improved structural integrity are achieved, but the flame pattern stability is compromised under certain operating conditions
Solution Approach 1:
The patent changes the emissivity parameter from low to high by selecting specific ceramic material compositions and controlling the thermal spray process to achieve the desired surface properties. This parameter change simultaneously improves service life through better thermal protection and maintains flame stability through proper material selection
Solution Approach 2:
The patent uses composite ceramic coatings composed of multiple oxides (alumina, zirconia, magnesia) that combine the benefits of high emissivity for thermal protection with appropriate surface characteristics for flame stability, achieving both reliability and composition stability
3Productivity
If high winds are present, then the flame is blown sideways to increase thermal destruction efficiency, but the stack and tip fail due to high heat zones in exposed areas
Solution Approach 1:
The high emissivity coating serves a dual function: it protects the metal from thermal damage during windy conditions while also facilitating heat radiation away from the structure. The coating essentially protects itself and the substrate simultaneously through its inherent thermal properties, eliminating the need for additional protective structures
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 high emissivity layer reduces metal temperatures by up to 200-400°C, increases thermal oxidation efficiency by up to 25%, and extends flare life by minimizing maintenance and downtime.
Implementation Method 1
The high emissivity layer reduces metal temperatures by up to 200-400°C
Implementation Method 2
thermal oxidizing environments can also lead to tip, stack, and/or shield failure due to fatigue in metal components thereof
Implementation Method 3
increases thermal oxidation efficiency by up to 25%
Data Source
AI summary
A center flare tip assembly (16) and plenum flare tip assembly (18) with arms (20), having the outside of the center flare tip assembly (16), both inside and outside of the tips (18), the outside of the arms (20), and/or adjacent features of the flare tip (12) are covered with a high emissivity thermal layer (14) with an emissivity greater than 0.85. This reduces flare metal temperatures by thirty percent (30%) or greater, and increases flare life by two (2) to five (5) times current life.