Submerged Burner Mixing Chamber for Stable Hydrogen Combustion
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Solution Overview
Problem
Conventional submerged burners face issues such as flame-out due to melt fluctuations, difficulty in maintaining stable combustion, especially with hydrogen fuel, and high energy consumption due to cooling requirements, along with challenges in monitoring and maintenance.
Innovation Solution
A burner design featuring a mixing chamber and through passages with controlled flow areas to retain combustion, rotational fluid flow for enhanced mixing, and an intelligent ignition system to prevent flame extinction and simplify maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the burner is cooled by a circulating cooling medium, then the burner is protected from ablation and damage, but a large amount of heat is removed resulting in increased energy consumption
Solution Approach 1:
The burner uses the heated medium itself as the cooling medium, eliminating the need for separate cooling systems. The heated medium flows through cooling channels in the burner, absorbing heat and cooling the burner components while simultaneously serving as the medium being heated, thus achieving self-cooling without additional energy consumption
Solution Approach 2:
The heated medium serves dual functions: as the medium to be heated and as the cooling medium for the burner. This multi-functionality eliminates the need for separate cooling systems and reduces overall energy consumption while protecting the burner from thermal damage
2Loss of energy
If the nozzles of the burner are immersed in the melt of the heated medium, then heat transfer efficiency is improved, but the fluctuation of the melt can easily cut off the flame leading to flame-out
Solution Approach 1:
The burner is divided into multiple nozzles arranged in an array, with each nozzle having its own independent through passage. This segmentation allows the flame to be distributed across multiple points, reducing the impact of melt fluctuations on any single flame and improving overall flame stability while maintaining high heat transfer efficiency
Solution Approach 2:
The mixing chamber pre-mixes the fuel and oxidant before they enter the nozzles, ensuring proper mixture composition and combustion characteristics. This preliminary mixing action ensures stable combustion even when nozzles are immersed in fluctuating melt conditions
3Reliability
If the sum of the sectional areas of the through passages is made smaller than the sectional area of the mixing chamber, then the flame is retained in the mixing chamber preventing flame-out, but the flow rate of the fluid mixture is reduced
Solution Approach 1:
The system optimizes the ratio between the sectional area of through passages and mixing chamber by adjusting operational parameters such as pressure differential and fluid velocities. This allows the flame to be retained in the mixing chamber while maintaining adequate flow rates through the nozzles for effective combustion
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 burner maintains stable combustion, reduces energy consumption by eliminating separate cooling needs, and facilitates easier maintenance with improved heat transfer efficiency and reduced explosion risk.
Implementation Method 1
the first fluid and the second fluid are mixed in the mixing chamber to form a fluid mixture
Implementation Method 2
the combustion products of a high flow rate generated by the oxidant and the fuel enter the heated medium, and the gas expands during the submerged combustion process, thereby the heated medium is rapidly heated up or melted and generates a large amount of turbulence
Implementation Method 3
A burner is an apparatus that converts an oxidant and a fuel into heat by a chemical reaction of combustion
Implementation Method 4
the combustion products of a high flow rate generated by the oxidant and the fuel enter the heated medium, and the gas expands during the submerged combustion process, thereby the heated medium is rapidly heated up
Implementation Method 5
the flame and combustion products of the fuel and the oxidant pass through and come into direct contact with the heated medium. The heat transfer effect is thus much more efficient than that of the flame radiant heat transfer over the heated medium
Data Source
AI summary
The present invention relates to a burner. At least one first passage, at least one second passage and a mixing chamber are formed in the burner, and the mixing chamber is respectively connected to an outlet of the first passage and an outlet of the second passage, so that a first fluid and a second fluid are mixed in the mixing chamber to form a fluid mixture; wherein the burner includes a nozzle, and at least one through passage fluidly connected to the mixing chamber is formed in the nozzle, so that the fluid mixture flows out from the at least one through passage, and wherein the sum of the sectional areas of the at least one through passage is smaller than the sectional area of the mixing chamber.