Analysis of Exhausting Flue Gas Temperature Abnormal Accompanied with the Boiler Load Changing

Abstract:

Based on the heat-transfer principle of air pre-heater, the influence mode of the changes of the air flow, the flue gas flow, the air leakage in different locations, to the temperature of the hot air and the exhausting gas was researched. The problem of a pulverized coal fired boiler, No.2, of a Thermal Power Plant, which the deviation of exhausting flue gas temperature increased to an abnormal extend when the boiler load rise up quickly was analyzed, the fault position and fault reason were located exactly, and the fault was eradicated by equipment maintenance at last. The results of this study have a certain significance to solve similar problems.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 1836-1842
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.1836
• Online since: September 2013
• Authors: Qing Feng Zhang*, Zhen Xin Wu, Zhen Ning Zhao
• Keywords: Air Leakage, Air Preheater, Flue Gas Temperature Deviation, Load Change, Pulverized Coal Boiler

References

[1] Xueliang Li, Zhichao Liu. Flue gas temperature deviation at the exit of 1025t/h boiler furnace with tangential firing[J]. Electric Power, 1997, 30(6): 3-5. (In Chinese).

[2] Huaijun Ma, Zuohe Chi, Zhang Xu, et al. Analysis of reheater bursting problems of 670t/h boilers[J]. Electric Power. 2000, 33(5): 24-26, 39. (In Chinese).

[3] Minghou Xu, Jianwei Yuan, Shifa Ding, et al. Numerical simulation on gas temperature deviation in a coal fired 1025 t/h boiler[J]. Proceedings of the Csee. 1996, 16(4): 267-270. (In Chinese).

[4] Yuegui Zhou, Tongmo Xu, Shien Hui, et al. Research on the forming mechanism of the flue-gas temperature deviation in the horizontal pass for tangentially fired boiler[J]. Power Engineering. 2001, 21(5): 1422-1425. (In Chinese).

[5] Yanhui Wang, Hong Xu, Zhizhong Kang, et al. Combustion model and numerical research on flue gas imbalance in tangentially fired boiler[J]. Power Engineering. 2004, 24(5): 693-697. (In Chinese).

[6] Ze Zhang, Xuchang Xu. Closed streamline numerical simulation on two-phase flow field of upper furnace and superheater platen zones in tangential-firing boiler[J]. Journal of Combustion Science and Technology. 2002, 8(2): 97-102. (In Chinese).

[7] Xiaotao Gao. Testing and study on decreasing flue gas temperature deviation at furnace exit of 600MW boiler unit[J]. Electric Power. 2002, 35(8): 1-4. (In Chinese).

[8] Junhu Zhou, Guoliang Song, Yinbiao Chen, et al. Test and research of flue gas temperature deviation at the furnace exit of a 2008 t/h boiler with tangential firing[J]. Thermal Power Generation. 2003, 6: 34-35. (In Chinese).

[9] Shifa Ding, Kaixuan Yang. Online optimization on thermal deviation of high-temperature heat pipe panels for a supercritical boiler[J]. Journal of Chinese Society of Power Engineering. 2011, 31(4): 243-247. (In Chinese).

[10] Hongquan Yang, Fuchun Li, Nile Zhang, et al. Numerical study on non-uniform heat absorption along heat surface height in the screen zone of a supercritical boiler[J]. Journal of Chinese Society of Power Engineering. 2010, 30(12): 895-898. (In Chinese).

[11] Xiumin Jiang, Zhigang Cui, Yufeng Ma, et al. Numerical simulation and engineering practice of a 670 t/h corner tangential boiler with reverse-tangent and swirling-elimination[J]. Proceedings of the Csee. 2005, 25(18): 109-115. (In Chinese).

[12] Chungen Yin，Rosendahl Lasse，Condra Th omas J．Further study of the gas temperature deviation in large-scale tangentially coal-fired boilers[J]. Fuel, 2003, 82(9): 1127-1137. (In Chinese).

DOI: 10.1016/s0016-2361(02)00418-0

[13] Yanpeng Li, Qiang Zhang, Fan Gu, et al. Numerical study on the effect of reverse swirl of secondary air on flue gas imbalance in large tangentially fired boiler[J]. Proceedings of the Csee. 2001, 21(9): 33-37. (In Chinese).

[14] Zuohe Chi, Hao Zhou, Jianjun Xia, et al. Prediction on the flame stability and slagging prevention with concentric firing system using computer simulation[J]. Proceedings of the Csee. 1998, 18(2): 135-139. (In Chinese).