Industrial Burner with Movable Fuel Lance for NOx Control
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Solution Overview
Problem
Existing industrial burners face challenges in achieving low NOx emissions and flexibility in operation, particularly in mixing and burning fuel in different chambers, which affects combustion efficiency and component durability.
Innovation Solution
An industrial burner design featuring a mixing chamber with two fuel lances that can switch between operation states, allowing fuel to be introduced at different angles for thorough mixing in the first state and shifting combustion to the furnace room in the second state, using a combustion air supplier and adjustable fuel flows to influence the mixing and temperature profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If fuel is introduced into the mixing chamber at a first angle for thorough mixing, then mixing quality is improved, but combustion efficiency may be reduced due to incomplete combustion in the mixing chamber
Solution Approach 1:
The fuel lance is designed to be movable relative to the mixing chamber, allowing it to change its position and angle dynamically. This enables the system to adapt the fuel introduction angle based on operational requirements, optimizing both mixing quality and combustion efficiency at different operating stages.
Solution Approach 2:
The system changes the angular parameter of fuel introduction by moving the fuel lance to different positions. By adjusting this geometric parameter, the system can control the mixing characteristics and combustion behavior, resolving the contradiction between thorough mixing and combustion efficiency.
2Object-generated harmful factors
If combustion is shifted to the furnace room to minimize NOx emissions, then emission quality is improved, but thermal demands on the mixing chamber components increase
Solution Approach 1:
The movable fuel lance allows dynamic adjustment of the combustion location. By changing the fuel introduction angle and position, the system can control where combustion occurs - in the mixing chamber for high-temperature operation or in the furnace room for lower-temperature operation, thus managing thermal demands on components while controlling NOx emissions.
3Device complexity
If a single fuel nozzle configuration is used, then device complexity is reduced, but operational flexibility is limited
Solution Approach 1:
Instead of using multiple fixed nozzles, the invention employs a single movable fuel lance that can be positioned at different angles and locations. This dynamic configuration provides operational flexibility equivalent to having multiple fixed nozzles, while maintaining simpler device complexity and fewer components.
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 ensures thorough mixing and partial combustion in the mixing chamber, reduces thermal demands on components, increases service life, and minimizes NOx emissions by shifting combustion to the furnace room, while allowing for flexible operation and improved burner performance.
Implementation Method 1
fuel and air are mixed in the mixing chamber and at least a partial reaction is carried out therein
Implementation Method 2
The fuel and the combustion air are mixed together and ignited in a high-heat resistant combustion chamber
Implementation Method 3
The mixing of the fuel and the combustion air then first takes place in the furnace room
Implementation Method 4
The higher the pressure within the fuel supplier the movable burner head moves in a longitudinal direction of the burner
Data Source
AI summary
The industrial burner (10) comprises a mixing chamber (3), which is provided with at least one opening (2) into a furnace room (1), through which opening at least a partially-mixed fuel flow from the mixing chamber (3) dispenses into the furnace room during operation, a combustion air supplier (15), through which the mixing chamber (3) is supplied with combustion air during operation, and a fuel supplier (I1 8), with which fuel is introduced into the mixing chamber, are provided. The fuel supplier (7, 8) can switch between a first and a second operation state, wherein in the first operation state, fuel is introduced into the mixing chamber (3) at a first angle (5) with respect to the axial direction of the mixing chamber such that fuel and air are mixed in the mixing chamber and at least a partial reaction is carried out therein, and in the second operation state, fuel is introduced into the mixing chamber (3) at substantially the same axial position with respect to the opening (2) as in the first operation state and additionally at least at a second angle (6) with respect to the axial direction of the mixing chamber. The first angle (5) differs from the second angle (6).