电站循环水泵效率求取试验方法对比分析研究
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摘要
循环水泵效率是电站循环水系统运行方式优化的重要指标,为提高循环水系统运行经济性,必须对循泵运行方式进行优化调整,而准确确认循泵效率势在必行。目前电站循环水流量采用超声波流量计、热平衡方法,但两种测量方法各有利弊。结合现场第一手资料和丰富的工程实践经验,采用循泵扬程—流量曲线拟合反推法对循环水流量进行了计算,确认了循泵效率。以某330MW火力发电厂循环水泵效率为例,对实际应用测量结果进行了分析比较,试验结果证明其科学合理性,可供工程实际应用参考。
Circulating water pump efficiency is an important index for power plant circulating water system optimization.The circulating water system operation method must be optimized and adjusted to improve its operation economy,and it is imperative to identify the accurate pump efficiency.At present,the circulating water flow of the power station adopts ultrasonic flowmeter and thermal equilibrium method.Both measures have advantages and disadvantages.In this paper,combined with a large amount of first-hand information and rich experience in engineering practice,the pump head-flow path and curve fitting of backstepping method for the computation of the circulating water flow was applied to confirm follow pump efficiency;taking a 330 MW thermal power plant circulating water pump efficiency as an example,it analyzes the practical application of measured results.The results of the experiment prove its scientific rationality and the practical application of the project.
Circulating water pump efficiency is an important index for power plant circulating water system optimization.The circulating water system operation method must be optimized and adjusted to improve its operation economy,and it is imperative to identify the accurate pump efficiency.At present,the circulating water flow of the power station adopts ultrasonic flowmeter and thermal equilibrium method.Both measures have advantages and disadvantages.In this paper,combined with a large amount of first-hand information and rich experience in engineering practice,the pump head-flow path and curve fitting of backstepping method for the computation of the circulating water flow was applied to confirm follow pump efficiency;taking a 330 MW thermal power plant circulating water pump efficiency as an example,it analyzes the practical application of measured results.The results of the experiment prove its scientific rationality and the practical application of the project.
引文
[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):3l-33.XIAO Xinghe,XUE Yanting.Retrofitting technology for energy-saving of circulating water pumps and application[J].Thermal Power Generation,2007,36(12):31-33.
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[3]盛焕程,刘树松.循环水泵双泵运行最佳时机[J].热力发电,2003,32(9):57-59.SHENG Huancheng,LIU Shusong.Optimal conditions of dual-pump operation for circulating-water pumps[J].Thermal Power Generation,2003,32(9):57-59.
[4]李青,公维平.火力发电厂节能和指标管理技术[M].北京:中国电力出版社,2006.
[5]胡洪华,居文平,黄廷辉.大型电站凝汽器优化运行的研究和实践[J].热力发电,2003(3):56-58.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(3):56-58.
[6]李勇,曹祖庆.200MW汽轮机多背压运行的热经济性分析[J].热能动力工程,2001,16(2):138-140.LI Yong,CAO Zuqing.An analysis of the the rmodynamic effectiveness of a 200 MW steam turbine with mu ltiple back-pressure operation[J].Journal of Engineering for Thermal Energy and Power,2001,16(2):138-140.
[7]山西省电力局.热工仪表及自动装置[M].北京:中国电力出版社,2007.
[2]周颜,李顺才,李伟.火力发电厂循环水泵双速节能改造[J].发电设备,2007,21(5):383-385.ZHOU Yan,LI Shuncai,LI Wei.Revamping a fossil fired power plant′s circulation pump for energy saving by dual speed operation[J].Power Equipment,2007,21(5):383-385.
[3]盛焕程,刘树松.循环水泵双泵运行最佳时机[J].热力发电,2003,32(9):57-59.SHENG Huancheng,LIU Shusong.Optimal conditions of dual-pump operation for circulating-water pumps[J].Thermal Power Generation,2003,32(9):57-59.
[4]李青,公维平.火力发电厂节能和指标管理技术[M].北京:中国电力出版社,2006.
[5]胡洪华,居文平,黄廷辉.大型电站凝汽器优化运行的研究和实践[J].热力发电,2003(3):56-58.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(3):56-58.
[6]李勇,曹祖庆.200MW汽轮机多背压运行的热经济性分析[J].热能动力工程,2001,16(2):138-140.LI Yong,CAO Zuqing.An analysis of the the rmodynamic effectiveness of a 200 MW steam turbine with mu ltiple back-pressure operation[J].Journal of Engineering for Thermal Energy and Power,2001,16(2):138-140.
[7]山西省电力局.热工仪表及自动装置[M].北京:中国电力出版社,2007.