Taking a 1 000 MW ultra supercritical tower boiler as an example, the influence of burner design on thermal deviation of the heating surfaces was studied by means of numerical simulation, and subsequently the simulation results were compared with actural operation data of the boiler. Results show that the thermal deviation of heating surfaces presents the saddle distribution due to the flue gas ring formed in the furnace caused by tangential firing, where both the flue gas temperature and velocity are high. Changing the installation angle of burner would affect the position and size of the flue gas ring, and then further affect the distribution of the thermal deviation. The effect of installation angle of burner could be reduced by adopting the blowback type of pulverized coal burner and reducing the angle of the bias air. Reversely and horizontally swinging the separated overfire air could effectively reduce the thermal deviation on the flue gas side.
Key words
tower boiler /
burner /
thermal deviation /
numerical analysis
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 李树田, 陈莉. 超临界锅炉SOFA对高温受热面热偏差影响的试验研究[J]. 动力工程学报, 2013, 33(9):419-424. LI Shutian, CHEN Li. Effect of supercritical boiler SOFA on heat absorption deviation of the high-temperature heating surfaces[J]. Journal of Chinese Society of Power Engineering, 2013, 33(9):419-424.
[2] 蒋欣军,王煜伟.基于热偏差的燃烧调整在超超临界塔式锅炉中的应用[J].华北电力技术,2015(2):66-70. JIANG Xinjun, WANG Yuwei. Application of combustion adjustment based on heat absorption deviation at ultra-supercritical tower-type boiler[J]. North China Electric Power, 2015(2):66-70.
[3] 刘珊伯, 孟繁兵, 许颂梅, 等. 1000 MW超超临界塔式锅炉关键调试技术及优化运行[J]. 黑龙江电力, 2014, 36(5):467-470. LIU Shanbo, MENG Fanbing, XU Songmei, et al. Key debugging technology and optimal operation for 1000 MW super-supercritical tower-type boiler[J]. Heilongjiang Electric Power, 2014, 36(5):467-470.
[4] 边宝, 朱林阳. 世界首台二次再热塔式锅炉的调试方法与运行特性[J]. 锅炉技术, 2017, 48(5):69-72. BIAN Bao, ZHU Linyang. Commissioning and operation characteristics of the world's first 1000 MW tower boiler with double reheat cycles[J]. Boiler Technology, 2017, 48(5):69-72.
[5] 胡鹏, 管诗骈, 丁建良. 国内首台百万二次再热机组过热汽温调节特性探讨[J]. 锅炉技术, 2017, 48(3): 15-21. HU Peng, GUAN Shipian, DING Jianliang. Study on adjustment of superheated steam temperature in first 1000 MW dual reheat cycle unit in China [J]. Boiler Technology, 2017, 48(3): 15-21.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(1074 KB)
