Structure optimization simulation of slit burner with low NOx

被引:0
作者
Liu H. [1 ]
Zhang L. [2 ]
Yang X. [3 ]
Li D. [3 ]
机构
[1] New Energy Science and Engineering Department, School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning
[2] School of Power and Energy, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi
[3] Energy and Power Department, School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning
来源
Huagong Xuebao/CIESC Journal | 2018年 / 69卷 / 04期
基金
中国国家自然科学基金;
关键词
Combustion; Low NO[!sub]x[!/sub] emission; Nature gas; Numerical simulation; Optimal design;
D O I
10.11949/j.issn.0438-1157.20170934
中图分类号
学科分类号
摘要
Natural gas has the characteristics of high heat value, high efficiency, low cost and low emission when used as fuel. However, when natural gas is burned, the local high temperature region can easily appear, andNOx is generated. Therefore, the optimized design of natural gas burner has a very important role for cleanly and effectively use of natural gas. The structure of the existing new type of slit burner with low NOxis optimized. There are two ways to improve the structure: the oblique air holes are opened on natural gas pipeline, the diversion baffles are added next to the small slit. The software Fluentis used for numerical simulation, and the experiment on the optimized burner is carried out. The simulation results are well verified bythe data measured in the experiment. The results on the optimized structure areobtained as following: round holes are oblique opened on the natural gas pipeline, compared with the original burner, the temperature distribution is more uniformand NOx emission is reduced. Round opening at the same direction with slit is better. When round holes are opened the same direction with slit in the natural gas pipeline, the average concentration of NOx in the flue gas outletdropped a lot, and the average concentration of NOx decreases gradually with the increase of the opening angle. The effect of diversion baffles added on the right side of slits is not as good as the original structure. When the diversion baffles are added on the left side of the slits, the average NOx emissions in the flue gas outlet is reduced, and theNOx emissions decreases first and then increases with the increase of the angle of the flap. Holes at the same direction with slit angle of 50°on natural gas pipeline are the best choice in all cases. © All Right Reserved.
引用
收藏
页码:1723 / 1730
页数:7
相关论文
共 30 条
[1]  
Hansen J., Sato M., Ruedy R., Et al., Global temperature change, Proceedings of the National Academy of Sciences, 103, 39, pp. 14288-14293, (2006)
[2]  
Tian G., Natural gas will be an important part of China's energy transformation in 13th five-year plan, Natural Gas Industry, 37, 4, (2017)
[3]  
National Bureau of Statistics. China Statistical Yearbook, pp. 102-103, (2016)
[4]  
Hu L.Y., Luo Y.H., Zhou L.X., Et al., Effect of outer secondary air on swirling pulverized-coal combustion and NO formation, CIESC Journal, 61, 9, pp. 2437-2441, (2010)
[5]  
Ti S., Chen Z., Kuang M., Et al., Numerical simulation of the combustion characteristics and NO<sub>x</sub> emission of a swirl burner: influence of the structure of the burner outlet, Applied Thermal Engineering, 104, pp. 565-576, (2016)
[6]  
Hou S.S., Lee C.Y., Lin T.H., Efficiency and emissions of a new domestic gas burner with a swirling flame, Energy Conversion and Management, 48, 5, pp. 1401-1410, (2007)
[7]  
Surjosatyo A., Priambodho Y.D., Kwok C.K., Investigation of gas swirl burner characteristic on biomass gasification system using combustion unit equipment (CUE), Journal Mekanikal, 33, 12, pp. 15-31, (2011)
[8]  
Lee C.Y., Baek S.W., Effects of hybrid reburning/SNCR strategy on NO<sub>x</sub>/CO reduction and thermal characteristics in oxygen-enriched LPG flame, Combustion Science and Technology, 179, 8, pp. 1649-1666, (2007)
[9]  
Audai H.A., Jamal N., David D., CFD modelling of air-fired and oxy-fuel combustion in a large-scale furnace at Loy Yang A brown coal power station, Fuel, 102, pp. 646-665, (2012)
[10]  
Liu H., Ren R.Q., Huang Y.J., Et al., Reduction and emission of NO in oxy-fuel system, CIESC Journal, 62, 2, pp. 495-501, (2011)