Abstract
The combustion effect of natural gas-air mixed combustion is optimised through an effective and rational design of the burner structure, thereby reducing the emission of atmospheric pollutants and achieving energy saving and emission reduction. This paper starts from the geometric model of the burner and uses Computational Fluid Dynamics (CFD) technology to numerically simulate the combustion distribution in the burner, which results in the combustion distribution of the burner after optimising the structure. The guiding effect of the blower guide vanes on the airflow is weak, and the back pressure effect of the guide vanes mounting body is significant, which reduces the primary air volume and prolongs the combustion history in the central region of the flame; The temperature field is evenly distributed and the combustion is well distributed; CH4 and CO in the furnace chamber are basically burned out and the NO concentration in the furnace chamber is about 800 ppm, which basically meets the emission standard and the combustion effect is good. This paper has certain guiding significance for the study of burner structure.
Highlights
In recent years, there has been an explosive growth in the use of gas burners as a complement to mixture equipment
A gas burner is the collective name for a device that causes natural gas and air to be ejected in a certain way and mixed for combustion[1]
With the rapid development of computer technology and numerical computing, more and more scholars are conducting numerical simulations and analytical studies on the combustion distribution and combustion effects of gas burners based on Computational Fluid Dynamics (CFD) technology
Summary
There has been an explosive growth in the use of gas burners as a complement to mixture equipment. Through effective and rational design of the burner structure, the proportionality and uniformity of distribution of natural gas and air are optimised to improve the combustion effect of the burner combustion and reduce the NOx emissions[2]. With the rapid development of computer technology and numerical computing, more and more scholars are conducting numerical simulations and analytical studies on the combustion distribution and combustion effects of gas burners based on Computational Fluid Dynamics (CFD) technology. From the research results of excellent scholars, it can be concluded that the structure of an effective and reasonable gas burner has a decisive role in the combustion distribution and low NOx exhaust emissions[11]. Based on many considerations mentioned above, this paper proposes a gas multi-level burner and conducts a numerical study of its combustion distribution and combustion effect.
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