Research on the numerical simulation of secondary air diffusion angle to the swirl burners combustion process

2017 2nd International Seminar on Advances in Materials Science and Engineering

Yu, Lei^1 ; Chang, Zhen^1 ; Liu, He^1 ; Yang, Guotian^1 ; Li, Xinli^1

School of Control and Computer Engineering, North China Electric Power University, Beijing

102206, China^1

关键词: Boiler operations;    Carbon concentrations;    Combustion pro-cess;    Combustion research;    Furnace slagging;    Furnace temperatures;    Pulverized coal combustion;    Reference values;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012034/pdf
DOI  :  10.1088/1757-899X/231/1/012034

来源: IOP

【 摘 要 】

In this paper, the combustion process of swirl burners during 660 MW unit power plant is simulated. The influence of secondary air diffusion angle on the furnace temperature and furnace slagging is studied. In detail the temperature field and the carbon concentration field and velocity field inside the furnace are analysed when the secondary air diffusion angle is set as 30 °, 45 ° and 60 ° respectively. The simulation results show that when the secondary air diffusion angle is set as 30°, the center temperature of the furnace is highest, and at this time the pulverized coal combustion is sufficient, the carbon concentration near the water wall is the lowest, moreover, it is not easy to slag in the furnace. With the increase of secondary air diffusion angle, the center temperature of boiler burning zone gradually decline, carbon concentration near the water wall increase, it is the more prone to coking inside the furnace. The numerical simulation results not only provide a reference basis for the boiler operation, but also provide an important reference value for exquisite combustion research of the boiler.