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Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation
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Rongdi ZHANG1, Xiaofeng LU1, Xueshen WANG2, Zheng GAN2, Chen ZONG3, Zhongzhi YANG1, Zhonghao DONG1, Jianbo LI1, Quanhai WANG1, Yinhu KANG1
Thermal Power Generation | 2023, 52(9) : 39 - 47
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Thermal Power Generation | 2023, 52(9): 39-47
• Clean, efficient and flexible coal-fired power technology •
Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation
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Rongdi ZHANG1, Xiaofeng LU1, Xueshen WANG2, Zheng GAN2, Chen ZONG3, Zhongzhi YANG1, Zhonghao DONG1, Jianbo LI1, Quanhai WANG1, Yinhu KANG1
Affiliations
  • 1.Key laboratory of Low-grade Energy Utilization Technologies & Systems, Ministry of Education, Chongqing 400044, China
  • 2.Sichuan Baima CFB Demonstration Power Plant Co., Ltd., Neijiang 641005, China
  • 3.Special Equipment Testing and Research Institute of Chongqing, Chongqing 401120, China
Published: 2023-09-25 doi: 10.19666/j.rlfd.202305082
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In the domestic large circulating fluidized bed boilers designed with side wall and back wall coal feeding system, there are generally prominent problems of coal feeding delay and uneven coal feeding in the actual operation process. By analyzing the coal feeding delay problem of large CFB boiler units and the operation characteristics of the existing coal feeding system, the quantitative calculation method of coal feeding delay problem of large CFB boiler coal feeding line is put forward. Based on the case of a supercritical 600 MW CFB boiler coal feed line, the coal feed delay characteristics of the coal feed line under the condition of wide load and rapid peak regulation are obtained. The calculation results show that the coal feed delay problem is common in the variable load operation process of large CFB boiler units, which will lead to a certain degree of uneven coal feed. The variable load range, variable load rate and the number of coal feed ports on the single feed line are positively correlated with the severity of the delay problem. The calculation method and analysis results can provide design basis and technical reference for large CFB boiler coal feed line to adapt to wide load and fast peaking operation.

CFB boiler  /  coal feeding uniformity  /  coal feeding system  /  load changing condition
Rongdi ZHANG, Xiaofeng LU, Xueshen WANG, Zheng GAN, Chen ZONG, Zhongzhi YANG, Zhonghao DONG, Jianbo LI, Quanhai WANG, Yinhu KANG. Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation[J]. Thermal Power Generation, 2023 , 52 (9) : 39 -47 . DOI: 10.19666/j.rlfd.202305082
Funding
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  • National Key Research and Development Program(2022YFB4100301)
Appendix
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Year 2023 volume 52 Issue 9
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Article Info
doi: 10.19666/j.rlfd.202305082
  • Receive Date：2023-05-28
  • Online Date：2026-01-26
  • Published：2023-09-25
Article Data
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History
  • Received：2023-05-28
Funding
National Key Research and Development Program(2022YFB4100301)
Affiliations
    1.Key laboratory of Low-grade Energy Utilization Technologies & Systems, Ministry of Education, Chongqing 400044, China
    2.Sichuan Baima CFB Demonstration Power Plant Co., Ltd., Neijiang 641005, China
    3.Special Equipment Testing and Research Institute of Chongqing, Chongqing 401120, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202305082
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
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