Premixed Burner Flame Transfer via Overflow Pipe
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Solution Overview
Problem
In a burner system with multiple premixed burners, simultaneous ignition is challenging due to the combustible gas/air mixture becoming incombustible when it mixes with ambient air before reaching adjacent burners, leading to difficulties in flame overflow and potential explosive combustion.
Innovation Solution
The burner system employs flame transfer means, including overflow pipes and injection members to guide and enhance the flame transfer between burners, ensuring rapid and reliable ignition of all burners before excessive gas/air mixture escapes, using a mixing chamber to form and inject the combustible mixture at higher pressure into the flame path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If burners are disposed adjacently to form a burner system, then the heating coverage is improved, but the flame overflow becomes difficult due to gas/air mixture mixing with ambient air
Solution Approach 1:
The patent introduces flame transfer means as an intermediary component between burners to facilitate flame transfer. This mediator enables the flame to travel from one burner to another through controlled paths, solving the problem of flame overflow difficulty while maintaining adjacent burner configuration for extended heating coverage.
Solution Approach 2:
The patent implements preliminary ignition of a first burner before igniting other burners. This preliminary action creates a ready-to-transfer flame source that can be systematically moved to adjacent burners, ensuring reliable ignition sequence while maintaining the benefits of adjacent burner arrangement.
2Productivity
If flame is transferred from one burner to another, then simultaneous ignition is achieved, but the flame may be extinguished due to excess air in the gas/air mixture
Solution Approach 1:
The flame transfer means acts as a protected pathway that shields the flame from excessive ambient air during transfer. This intermediary structure maintains flame sustainability by controlling the gas/air mixture composition along the transfer path, enabling rapid ignition while preventing flame extinction.
Solution Approach 2:
The patent modifies the gas/air mixture parameters along the flame transfer path by using controlled overflow pipes and injection members. These parameter changes ensure the mixture remains within combustible limits during flame transfer, achieving rapid ignition speed while maintaining flame sustainability.
3Length of stationary object
If overflow pipe is used to transfer flame, then flame transfer distance is increased, but the gas/air mixture may become incombustible before reaching the burner
Solution Approach 1:
The overflow pipe serves as a controlled intermediary conduit that maintains combustible conditions over extended distances. By providing a dedicated pathway with controlled geometry and positioning, it prevents premature mixing with ambient air while enabling flame transfer over larger distances than direct adjacent burners.
Solution Approach 2:
The patent applies local quality control by designing the overflow pipe with specific geometric characteristics and positioning it to create localized combustible zones. This ensures that the gas/air mixture remains within combustible limits along the entire transfer path, maintaining reliability over extended distances.
4Productivity
If injection member is used to inject gas/air mixture into flame path, then flame transfer is enhanced, but overheating of the flame path may occur
Solution Approach 1:
The injection member is positioned and designed to create localized injection zones rather than uniform heating. This local quality approach concentrates the gas/air mixture injection at specific points along the flame path, enhancing flame transfer efficiency while avoiding excessive temperature buildup in the entire path.
Solution Approach 2:
The patent applies partial action by injecting gas/air mixture only at specific locations and in controlled quantities rather than continuously along the entire path. This partial injection approach enhances flame transfer where needed while avoiding excessive temperature rise that would cause premature ignition or overheating.
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 solution guarantees safe and simultaneous ignition of all burners by safeguarding the flame against air excess and enabling efficient flame overflow over large distances, ensuring complete combustion without premature ignition, and can be applied in heat exchangers or other heating applications.
Implementation Method 1
the overflow pipe extends through the interspace, the flame can be transferred over relatively large distances
Implementation Method 2
at least one injection member directed toward the flame path for the purpose of injecting the combustible gas/air mixture therein
Implementation Method 3
a mixing chamber for forming the combustible gas/air mixture, this mixing chamber comprising at least one feed opening for air, at least one feed opening for gas
Implementation Method 4
the mixing of gas and a quantity of air necessary for the complete combustion thereof takes place prior to or in the burner head
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a burner system having a number of premixed burners (2), which each have one or more feed openings and outflow openings for a combustible gas/air mixture. The burner system is provided with means (11) for transferring a flame from one burner to another. By making use of such flame transfer means the burner system can be ignited at one of the burners, wherein the flame then overflows sufficiently-rapidly to the other burners in order to ignite them before a dangerously large quantity of the combustible gas/air mixture has flown out. These flame transfer means can define a flame path between the burners which can for instance be formed by an overflow pipe (12) mutually connecting the burners. The burner system can further be provided with a member (13) directed toward the flame path for the purpose of injecting the combustible gas/air mixture (M) therein. This injection member can be connected via a branch conduit (14) to a mixing chamber (5) in which the gas/air mixture is formed.