Abstract
In this study, we developed the design process and optimization of structural parameters of a new low-NOx burner based on low-NOx combustion technology and the flame stabilization principle. Firstly, on the basis of the two-stage swirl burner, we applied the fuel-graded combustion technology and introduced the central nozzle structure to explore the influence law of graded combustion on NOx emissions. Secondly, on the previously optimized structure, the matching law between the first- and second-stage cyclone blades is analyzed to obtain the optimum structural design solution for heat exchange efficiency and flame front length. Finally, a new conical blunt structure is introduced in conjunction with the flame stabilization principle, and we discuss the effects of different half cone angles on the flame stabilization, flame front length, and heat exchange efficiency of the burner. The research in this paper provides a reliable direction for the design optimization of low-NOx burners.
Highlights
Against the backdrop of energy-saving and emission reduction, the low-NOx swirl burner has become the main research direction in China [1]
Many researchers have investigated low-NOx burner technology in practical applications using two main approaches: the use of a burner test facility or computational fluid dynamics (CFD) modeling, which allows scholars to optimize multiple design parameters related to NOx emissions from industrial burners simultaneously
We examine the problems of poor flame stability, low heat exchange efficiency, and high NOx emissions of gas burners in the thermal system of asphalt mixing equipment, and we research the structural optimization design of natural gas burners
Summary
Against the backdrop of energy-saving and emission reduction, the low-NOx swirl burner has become the main research direction in China [1]. A review of the literature shows that there are few studies on the combustion performance of natural gas combustion chambers with two-stage blade swirler structures, and it is of great value and significance to study the NOx emission flow field and characteristics of different combustors. We examine the problems of poor flame stability, low heat exchange efficiency, and high NOx emissions of gas burners in the thermal system of asphalt mixing equipment, and we research the structural optimization design of natural gas burners. The influence of the two-stage blade structure on the performance of the combustion chamber is investigated through experiments and numerical simulations with the flame length, heat exchange efficiency, and NOx emission as evaluation indexes, and the structure of the burner is designed and optimized
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
