Staged Fuel Burner Insert Cooling Ports via Pre-mixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pre-mixed staged fuel burners in refineries and chemical processing plants suffer from coke deposition at the burner tip due to high temperatures, which reduces the effectiveness of the burner.
Innovation Solution
The solution involves mixing combustion air with staged fuel before injection into the furnace, using a mixer within the burner to cool the discharge ports and reduce the temperature, thereby preventing coke formation and fouling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If staged fuel is injected directly into the combustion zone at the burner tip without pre-mixing with combustion air, then the burner structure is simple, but the high temperature at the injection point causes coke formation that plugs the ports
Solution Approach 1:
The patent applies preliminary action by pre-mixing the staged fuel with combustion air in a mixer located within the burner body before the fuel reaches the discharge ports. This preliminary mixing cools the fuel and prevents coke formation at the injection points, resolving the reliability issue while maintaining operational simplicity
2Use of energy by moving object
If the burner tip is located within the furnace to reach high temperature for effective combustion, then combustion efficiency is improved, but the high temperature causes coke deposits on the burner components
Solution Approach 1:
The patent introduces combustion air as an intermediary substance that mixes with the staged fuel in a mixer before discharge. This intermediary cooling air reduces the temperature of the fuel at the discharge ports, preventing coke deposition while allowing the burner tip to remain in the high-temperature combustion zone for efficient combustion
3Reliability
If combustion air is mixed with staged fuel before injection, then the discharge ports are cooled and coke formation is prevented, but the device complexity increases
Solution Approach 1:
The patent merges the mixing function into the existing burner structure by incorporating a mixer within the burner body. The mixer combines the staged fuel with combustion air in a integrated manner, achieving port cooling and reliable operation without requiring separate external mixing equipment, thus minimizing the increase in device complexity
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
This approach reduces the risk of coke formation, maintains burner efficiency, and ensures consistent operation by maintaining lower temperatures at the fuel injection points.
Implementation Method 1
combustion air is mixed with the staged fuel in the burner before the staged fuel is injected into the furnace
Implementation Method 2
The addition of the combustion air cools the staged fuel discharge ports which reduces or eliminates the possibility of coke formation
Implementation Method 3
furnaces are used to provide heat to process fluid within conduits inside of the furnace. Heat is produced in the furnace with radiant burners
Data Source
AI summary
A insert for a staged fuel burner and processes for using a burner with the insert. The insert has a burner tip that injects a mixture of primary fuel and combustion air into a combustion zone to produce a flame. A staged fuel is also injected into the combustion zone. Prior to being injected into the combustion zone, from the burner tip, the staged fuel, is injected into the burner tip and draws combustion air from the mixer of the burner insert into the burner tip with the staged fuel.