Industrial Burner Fuel Injection Angle Control
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Solution Overview
Problem
Industrial burners face challenges in achieving low NOx-emissions and flexibility in operation, particularly in heating furnace rooms, as existing technologies do not effectively manage fuel and air mixing to optimize combustion efficiency and reduce emissions.
Innovation Solution
The industrial burner employs a mixing chamber with fuel suppliers that switch between two operation states, altering the angle of fuel introduction to manage fuel and air mixing within the chamber, allowing partial combustion to occur within the chamber in the first state and shifting combustion to the furnace room in the second state, thereby optimizing combustion efficiency and reducing thermal demands on the burner components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fuel is introduced at a fixed angle into the mixing chamber, then the mixing process is simple to control, but combustion efficiency and NOx emission control are compromised
Solution Approach 1:
The burner employs a fuel supplier that can dynamically switch between different operation states, changing the fuel introduction angle from a fixed value to a variable parameter. This allows optimization of combustion conditions and NOx emissions control while maintaining operational flexibility.
Solution Approach 2:
The invention changes the operational parameters of the fuel supplier by introducing multiple angles of fuel injection (first angle and second angle) relative to the axial direction of the mixing chamber. This parameter variation enables control over the mixing process and combustion characteristics to reduce NOx emissions.
2Device complexity
If combustion occurs entirely in the mixing chamber, then the burner structure is simplified, but thermal stress on the mixing chamber increases reducing component service life
Solution Approach 1:
The combustion process is segmented into two locations: partial combustion occurs in the mixing chamber and the remaining combustion takes place in the furnace room. This segmentation reduces thermal stress on the mixing chamber, extending its service life while maintaining combustion efficiency.
Solution Approach 2:
The fuel is pre-mixed with combustion air in the mixing chamber before being discharged into the furnace room where combustion is completed. This preliminary mixing action allows controlled partial combustion in the chamber while shifting the more thermally demanding combustion phase to the furnace room.
3Object-generated harmful factors
If fuel is introduced at multiple angles, then combustion efficiency and emission control improve, but the fuel supply system complexity increases
Solution Approach 1:
The fuel supplier is designed with multi-functionality to perform both single-angle and multi-angle fuel injection modes. This universal design allows the same device to adapt to different operational requirements (different angles) without requiring entirely separate fuel supply systems, thus limiting the increase in 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 configuration enhances combustion stability, reduces NOx emissions, and increases the service life of burner components by shifting combustion to the furnace room, allowing for improved temperature control and reduced thermal stress on the mixing chamber.
Implementation Method 1
The fuel and the combustion air are mixed together
Implementation Method 2
The resulting hot combustion gas flows through a nozzle-shaped outlet with high speed in the heating space, which further assists the temperature equalization
Implementation Method 3
The fuel is burned with a high air surplus by forming a long flame
Implementation Method 4
The fuel and the combustion air are mixed together and ignited in a high-heat resistant combustion chamber
Implementation Method 5
The resulting hot combustion gas flows through a nozzle-shaped outlet with high speed in the heating space
Implementation Method 6
The mechanical energy of the gas stream, which is being discharged from the combustion chamber and which partially originates from the fuel, serves to mix and circulate the gases in the heating room
Data Source
AI summary
The industrial burner comprising a mixing chamber, which is provided with at least one opening into a furnace room, through which opening at least a partially-mixed fuel flow from the mixing chamber dispenses into the furnace room during operation. A combustion air supplier, through which the mixing chamber is supplied with combustion air during operation, and a fuel supplier, with which fuel is introduced into the mixing chamber, are provided. The fuel supplier can switch between a first and a second operation state, wherein in the first operation state, fuel is introduced into the mixing chamber at a first angle, and in the second operation state, fuel is introduced into the mixing chamber at substantially the same axial position with respect to the opening as in the first operation state and at a second angle with respect to the axial direction of the mixing chamber.