Diagnostic Analysis on Insufficient Output of Circulating Water Pumps for a 300-MW Unit

doi:10.11930/j.issn.10.11930.2015.1.37

Abstract

Abstract: The circulating water flow is insufficient since the commissioning of a 300-MW generating unit, which greatly influences the economical efficiency of the unit. The testing analysis shows that the designed resistance of the circulating water system is less than the actual value, which leads to the insufficiently designed output of the circulating water pumps, so that the circulating water flow is too small to maintain the normal vacuum. According to the actual resistance characteristics of the circulating water system, new circulating water pumps are selected and substituted for the original ones, making the net coal consumption be reduced by 1.174~1.200 g/（kW·h）. The retrofit has achieved good effects. Therefore, some considerations in circulating water pump design and type selection are put forward.

Key words: circling pump, resistance of the circling water system, pump selection, energy saving

CLC Number:

TK264.1

MA Tingshan, CHENG Dongtao, XU Pengjiang, JU Wenping, CHEN Kai, REN Lijun. Diagnostic Analysis on Insufficient Output of Circulating Water Pumps for a 300-MW Unit[J]. journal1, 2015, 48(1): 37-39.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.1.37

https://www.electricpower.com.cn/EN/Y2015/V48/I1/37

References

[1] 肖兴和，薛彦廷. 循环水泵节能改造技术及其应用[J]. 热力发电，2007，36（12）： 69－71．
XIAO Xinghe, XUE Yanting. Retrofitting technology for energy- saving of circulating water pumps and application thereof[J].Thermal Power Generation, 2007, 36(12): 69-71.
[2] 朱小令，刘安，张立志，等. 国产引进型300 MW汽轮机组降耗措施研究[J]. 中国电力，2003，36（10）：16－20．
ZHU Xiaoling, LIU An, ZHANG Lizhi, et al. Reduce the energy loss of indigenous imported type 300 MW steam turbine units [J]. Electric Power, 2003, 36(10): 16-20.
[3] 肖兴和，佛铁梁，肖秀媛，等. 永济热电厂32SA-19A型循环水泵节能技术改造[J]. 中国电力，2001，34（9）： 23－25．
XIAO Xinghe, BI Tieliang, XIAO Xiuyuan, et al. Energy-saving retrofit of 32SA-19A type circulating water pump in Yongji cogeneration power plant[J]. Electric Power, 2001, 34(9): 23-25.
[4] 胡洪华，居文平，黄廷辉. 大型电站双背压凝汽器优化运行的研究和实践[J]. 热力发电，2003，32（3）：8－11．
HU Honghua, JU Wenping, HUANG Tinghui. Study and practice on optimizing operation of double back-pressure condenser in large-scale power plants[J]. Thermal Power Generation, 2003, 32(3): 8-11.
[5] 江浩，罗春雷，刘勇先，等. 火电机组节能降耗分析及研究[J].热力发电，2004，33（6）：1－5．
JIANG Hao, LUO Chunlei, LIU Yongxian, et al. Analysis of and study on energy saving and consumption reducing of thermal power units [J]. Thermal Power Generation, 2004, 33(6): 1-5.
[6] 李兴平，宋涛，潘持平，等. 300 MW机组斜流式循环水泵改造[J]. 中国电力，2000，33（10）：23－26．
LI Xingping, SONG Tao, PAN Chiping, et al. Retrofit of diagonal circulating water pumps of 300 MW generating units [J]. Electric Power, 2000, 33(10): 23-26.
[7] 于新颖，居文平，杨寿敏. 国产引进型300 MW汽轮机组凝汽器冷却面积探讨[J]. 热力发电，2004，33（8）：48－51．
YU Xinying, JU Wenping, YANG Shoumin. An approach to condenser’s cooling surface of home made imported type 300 MW steam turbine units [J]. Thermal Power Generation, 2004, 33(8):48-51.

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