Design and Development of a 660 MW High Efficiency Ultra-supercritical Double-furnace CFB Boiler

ZHANG Man, CAI Runxia, JIANG Xiaoguo, LÜ Junfu, GAO Xinyu, YANG Hairui

PDF(1094 KB)
Journal of Chinese Society of Power Engineering ›› 2018, Vol. 38 ›› Issue (5) : 341-346.

Design and Development of a 660 MW High Efficiency Ultra-supercritical Double-furnace CFB Boiler

  • ZHANG Man1, CAI Runxia1, JIANG Xiaoguo2, LÜ Junfu1, GAO Xinyu2, YANG Hairui1
Author information +
History +

Abstract

The design principle of a 660 MW high efficiency ultra-supercritical circulating fluidized bed (CFB) boiler was discussed, while its main performance parameters were predicted. The boiler adopts two parallel furnaces, and each furnace has an independent air supply system. External heat exchangers are used in the scheme, while panel superheaters and panel reheaters are arranged in the upper furnace. To reduce the deviation of steam temperature caused by incomplete symmetry of both the temperature and mass flow of flue gas and bed material in the two independent loops, the air supply rate, coal feeding rate and bottom ash discharging rate are controlled, steam mixture headers are used, while the flow direction of inlet flue gas in the backpass is changed. Results show that the design scheme with double furnaces can well solve the problem of temperature deviation, and ensure the positive flow characteristics in waterwalls even at low mass flux. Additionally, the auxilary power comsuption can also be reduced due to lower water pump head.

Key words

high efficiency ultra-supercritical boiler / CFB / double-furnace / design

Cite this article

Download Citations
ZHANG Man, CAI Runxia, JIANG Xiaoguo, LÜ Junfu, GAO Xinyu, YANG Hairui. Design and Development of a 660 MW High Efficiency Ultra-supercritical Double-furnace CFB Boiler. Journal of Chinese Society of Power Engineering. 2018, 38(5): 341-346

References

[1] 唐飞, 董斌, 赵敏. 超超临界机组在我国的发展及应用[J]. 电力建设, 2010, 31(1):80-82. TANG Fei, DONG Bin, ZHAO Min. USC unit development and application in China[J]. Electric Power Construction, 2010, 31(1):80-82.
[2] YUE Guangxi, YANG Hairui, LÜ Junfu, et al. Latest development of CFB boilers in China[C]//Proceedings of the 20th International Conference on Fluidized Bed Combustion. Berlin, Heidelberg, Germany:Springer, 2009:3-12.
[3] 向柏祥, 李建锋, 杨海瑞, 等. 大中型循环流化床锅炉机组运行现状分析[J]. 锅炉技术, 2016, 47(5):31-39, 46. XIANG Baixiang, LI Jianfeng, YANG Hairui, et al. The operation analysis of medium-sized circulating fluidized bed boiler units[J]. Boiler Technology, 2016, 47(5):31-39, 46.
[4] 蔡润夏, 吕俊复, 凌文, 等. 超(超)临界循环流化床锅炉技术的发展[J]. 中国电力, 2016, 49(12):1-7. CAI Runxia, LÜ Junfu, LING Wen, et al. Progress of supercritical and ultra-supercritical circulating fluidized bed boiler technology[J]. Electric Power, 2016, 49(12):1-7.
[5] 吕俊复, 张缦, 杨海瑞, 等. 简约型660 MW超超临界循环流化床锅炉设计开发[J]. 中国电机工程学报, 2014, 34(5):741-747. LÜ Junfu, ZHANG Man, YANG Hairui, et al. Conceptual design of a simplified 660 MW ultra-supercritical circulating fluidized bed boiler[J]. Proceedings of the CSEE, 2014, 34(5):741-747.
[6] 莫鑫, 蔡润夏, 吕俊复, 等. 基于返料灰温偏差的600 MW(e)循环流化床锅炉内气固不均匀分布[J]. 中国电机工程学报, 2016, 36(8):2175-2180. MO Xin, CAI Runxia, LÜ Junfu, et al. Analysis of non-uniform distribution of gas-solid flow in the 600 MW(e) CFB boiler based on the non-uniform distribution of returning ash temperature[J]. Proceedings of the CSEE, 2016, 36(8):2175-2180.
[7] 莫鑫, 黄逸群, 向柏祥, 等. 燃煤循环流化床锅炉中并联分离器的性能实验研究[J]. 煤炭学报, 2016, 41(10):2503-2507. MO Xin, HUANG Yiqun, XIANG Baixiang, et al. Experimental study on the performance of parallel cyclones in a coal-fired CFB boiler[J]. Journal of China Coal Society, 2016, 41(10):2503-2507.
[8] 胡南. 循环流化床锅炉燃烧系统非均匀性问题的模型研究[D]. 北京:清华大学, 2013.
[9] 李金晶, 吕俊复, 龚鹏, 等. 大型循环流化床锅炉炉膛内床压摆动的机理[J]. 动力工程学报, 2013, 33(4):245-249. LI Jinjing, LÜ Junfu, GONG Peng, et al. Wobble mechanism of pressure drop in furnace of a large scale CFB boiler[J]. Journal of Chinese Society of Power Engineering, 2013, 33(4):245-249.
[10] 程乐鸣, 许霖杰, 夏云飞, 等. 600 MW超临界循环流化床锅炉关键问题研究[J]. 中国电机工程学报, 2015, 35(21):5520-5532. CHENG Leming, XU Linjie, XIA Yunfei, et al. Key issues and solutions in development of the 600 MW CFB boiler[J]. Proceedings of the CSEE, 2015, 35(21):5520-5532.
[11] 程伟, 宋刚, 周旭, 等. 350 MW超临界循环流化床锅炉运行特性研究[J]. 东方电气评论, 2016, 30(4):38-42. CHENG Wei, SONG Gang, ZHOU Xu, et al. Study on operation characteristics of the Dongfang's 350 MW supercritical CFB boiler[J]. Dongfang Electric Review, 2016, 30(4):38-42.
[12] LI Yan, NIE Li, HU Xiukui, et al. Structure and performance of a 600 MWe supercritical CFB boiler with water cooled panels[C]//Proceedings of the 20th International Conference on Fluidized Bed Combustion. Berlin, Heidelberg, Germany:Springer, 2009:132-136.
[13] PAN Jie, LI Ran, YANG Dong, et al. Critical heat flux prediction model for low quality flow boiling of water in vertical circular tube[J]. International Journal of Heat and Mass Transfer, 2016, 99:243-251.
[14] 唐斌, 顾君苹, 张缦, 等. 350 MW超临界循环流化床锅炉水冷壁流量分配及壁温计算[J]. 煤炭学报, 2016, 41(10):2560-2567. TANG Bin, GU Junping, ZHANG Man, et al. Calculation on distribution of flow rate and temperature in water wall of 350 MW supercritical circulating fluidized bed boiler[J]. Journal of China Coal Society, 2016, 41(10):2560-2567.
PDF(1094 KB)

Accesses

Citation

Detail

Sections
Recommended

/