Experimental Study on Technical Difficulties of Botswana First Circulating Fluidized Bed Boiler during Loading Process

Abstract:

For study of technical difficulties that make Botswana first CFB (Circulating Fluidized Bed) boiler can’t reach full load at beginning of loading process, first experiments were carried out as awful experimental cases to analyze influencing factors; Second experiments were carried out as tentative experimental cases to select useful solutions; Third experiments were carried out as targeted experimental cases to execute chose solutions. Results indicate that one prominent difficulty during CFB boiler reaching full load is that boiler operation bed temperature was too high which was a comprehensive effect with some other influencing factors. CFB boiler bed temperature MFT (Main Fuel Trip) set point slight increasing, grain size changing of both start-up material and feeding coal, limestone injecting, fluidizing air of seal pot and FBHE appropriate controlling and FBHE (Fluid Bed Heat Exchanger) gradually start working are taken simultaneously, all these effective solutions solve the technical difficulties and accelerate the boiler reach full load, but attentions still need to be paid for the boiler stable operation permanently in future.

• Periodical: Advanced Materials Research (Volume 721)
• Pages: 357-362
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.721.357
• Online since: July 2013
• Authors: Guang Zeng, Sen Lin Zhao, Lai Wei, Run Ze Huang, Modiri Badirwang
• Keywords: Circulating Fluidized Bed, External Circulation Material, Fluid Bed Heat Exchanger, Full Load, Operation Bed Temperature High

References

[1] Zhang tong, Chen Yongshun, Sun Yunli, The Combustion Control and Adjusting in Circulating Fluidized Boiler, J. Energy Technology, 2003,24(1):33~34.

[2] Lu Chunmei, Cheng Shiqing, Wang Yongzheng, Circulating fluidized bed boiler equipment and operation, Beijing, China Electric Power Press, 2003.

[3] Shen Jianping, Yin Chungen, Li Jun, Fang Mengxiang, Study on Separation Property of Cyclone of Circulation Fluidized Bed Boiler, J. Electric Power Construction, 2002, 23(8):12~15.

[4] Zhang Qingguo, Study on Commissioning of the Large-scale Circulating Fluidized Bed Boiler [dissertation]. Beijing, China: Tsinghua University,2004.

[5] Yu Baowei, Shi Shuaijun, Hu Xiaojie, Influences and Countermeasures of Limestone desulphurization on CFB Boiler, J. Energy and Environment, 2007,25(4):34~35.

[6] Zhou Yigong, Lu Ming, Effect of Limestone Desulfurization on CFB Boiler Efficiency, J. Boiler Technology, 2000,31(10):13~16.

[7] Zhong Li, Xu Zhengquan, Cao Xingwei, et al, Test Study on Combustion Adjustment of One CFB Boiler for 300MW Unit, J. Thermal Power Generation, 2012,41(5):69~72.

[8] Cen Kefa, et al, Circulating Fluidized Bed Boiler Theoretical Design and Operation, Beijing, China Electric Power Press, 1998.

[9] Liu Haifeng, Kong Lingjia, Liao Peng, et al, Application and Effectiveness of Starting-up with Low Bed Material in CFB Boiler of 300MW, J. Thermal Power Generation, 2011,40(9):56~5.

[10] Information on Morupule B CFB Boiler General Operating Instruction from AE&E LENTJES.