Radiant Burner with Back-Radiating Screen for Uniform Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiant burners suffer from local overheating, poor temperature uniformity, and low energy efficiency due to honeycomb-like perforations and additional screens, limiting radiative output and overall energy efficiency.
Innovation Solution
A radiant burner design featuring multiple levels of burner surfaces with a second radiant screen positioned near the burner plate, made of heat-resistant materials, which provides back radiation to achieve uniform temperature distribution and increased radiative output without overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If honeycomb-like perforation patterns are used in the radiant burner plate, then the temperature level and radiative output are increased, but local overheating occurs and temperature uniformity deteriorates
Solution Approach 1:
The burner plate is divided into multiple zones with different perforation densities. The front zone has lower perforation density while the rear zone has higher perforation density, segmenting the heat distribution to prevent local overheating while maintaining overall temperature level.
Solution Approach 2:
Different regions of the burner plate are given different local properties through varied perforation patterns. The front zone uses a first pattern optimized for uniform heat distribution, while the rear zone uses a second pattern optimized for higher radiative output, allowing each region to perform its specific function optimally.
2Use of energy by moving object
If additional radiant screens are added to enhance radiative output, then the radiation efficiency is improved, but local overheating of the burner plate worsens
Solution Approach 1:
Instead of adding more screens in the same spatial plane, the solution introduces a temporal dimension by sequentially activating different burner zones. The front zone operates first to establish uniform heating, then the rear zone activates to provide additional radiative output, avoiding simultaneous overheating while achieving cumulative radiation efficiency.
Solution Approach 2:
The burner operates in periodic cycles, alternating between front zone operation and rear zone operation. This periodic activation allows each zone to contribute to radiative output without causing sustained local overheating, thereby improving overall radiation efficiency while controlling temperature peaks.
3Power
If through holes or perforations are increased to raise temperature, then radiative output is improved, but the limitation on radiation energy increases due to overheating
Solution Approach 1:
The burner plate incorporates multiple rows of perforations with varying densities across different zones. This segmentation allows the system to utilize a higher total number of perforations for increased radiative output while distributing the thermal load across zones that are activated sequentially, preventing any single area from exceeding temperature limits that would compromise durability.
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 design achieves greater temperature uniformity and higher energy efficiency, with a 10% increase in radiation factor and reduced emissions of combustion byproducts, suitable for high-temperature applications like drying moving paper webs.
Implementation Method 1
the second radiant screen acts as an extended burner surface and also heats up said at least one radiant burner plates by back radiation when in use
Implementation Method 2
The screen together with the radiant burner plate provides the radiative output of the burner
Implementation Method 3
combustion chamber. The premixing chamber is separated from the combustion chamber
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
A radiant burner comprises a body defining a premixing chamber and a combustion chamber. The premixing chamber is separated from the combustion chamber by at least one radiant burner plate (2) which has multiple levels of burner surface. The combustion chamber is further limited by a first radiant screen (4). The radiant burner further comprises a second radiant screen (3) in the combustion chamber. The second radiant screen is spaced from, but near and parallel to the radiant burner plate(s), such that this second radiant screen acts as an extended burner surface and also heats up said at least one radiant burner plate when in use.