罗茨-水环真空泵在火电厂应用的节能效果分析
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摘要
为节约火电厂厂用电耗,基于660 MW汽轮发电机组,采用罗茨-水环真空泵替换原有水环真空泵,分析不同凝汽器真空严密性条件下两种真空泵的运行功率及对机组经济性的影响。结果表明:罗茨-水环真空泵可有效降低抽真空系统能耗,在真空严密性较好时,能降低原真空泵能耗的66.5%,但当真空严密性变差时,节能效果减弱甚至不节能。
In order to save the power consumption of the thermal power plant,based on the 660 MW steam turbine generator set,the original water ring vacuum pump was replaced by a Roots-water ring vacuum pump. The operating power of the two vacuum pumps and economic impact to steam turbine generator set was analyzed under different vacuum tightness conditions of the condenser. The results showed that the Roots-water ring vacuum pump can effectively reduce the energy consumption. When the vacuum tightness is good,it can reduce the energy consumption of the original vacuum pump by 66.5%. However,when the vacuum tightness deteriorates,the energy saving effect is weakened or even does not exist.
In order to save the power consumption of the thermal power plant,based on the 660 MW steam turbine generator set,the original water ring vacuum pump was replaced by a Roots-water ring vacuum pump. The operating power of the two vacuum pumps and economic impact to steam turbine generator set was analyzed under different vacuum tightness conditions of the condenser. The results showed that the Roots-water ring vacuum pump can effectively reduce the energy consumption. When the vacuum tightness is good,it can reduce the energy consumption of the original vacuum pump by 66.5%. However,when the vacuum tightness deteriorates,the energy saving effect is weakened or even does not exist.
引文
[1] GB 50660-2011,大中型火力发电厂设计规范[S].GB 50660-2011,Large and medium-sized thermal power plant design specifications[S].
[2] Heat Exchange Institute. Standards for steam surfacecondenser(11th edition)[S].
[3] 王标,李松波,徐峰.水环式真空泵节能技术改造措施探讨[J].热能动力工程,2017,32(1):113-116. WANG Biao,LI Song-bo,XU Feng. Improvement in energy saving technology for water ring vacuum[J].Journal of Engineering for Thermal Energy & Power,2017,32(1):113-116.
[4] 舒德衡,陈琛,贾珅.火力发电厂真空泵工作液补充冷却节能改造[J].安徽电力,2014,31(S1):12-15.SHU De-heng,CHEN Chen,JIA Shen. Reconstruction of supplementary cooling energy saving for vacuum pump working fluid in coal-fired powerplant[J]. Anhui electric power,2014,31(S1):12-15.
[5] 贺旭虎.火电厂汽侧真空泵密封水系统加装压缩制冷装置[J]东北电力技术,2009(4):34-36.HE Xu-hu.Compressed refrigerating machinery to be fixed on seal water system for vacuum pump at the steam side in power plant[J]. Northeast Power Technology,2009(4):34-36.
[6] 张代新,谢旭阳.水环真空泵工作水强行冷却的研究和应用[J].山东电力高等专科学校学报,2012,15(6):38-41.ZHANG Dai-xin,XIE Xu-yang.Research and application on water ring vacuum pump water forced cooling[J]. Journal of Shandong Electric Power College,2012,15(6):38-41.
[7] 孙永平,周轶.水环式真空泵抽吸能力对凝汽器真空影响的试验分析[J].浙江电力,2006(1):45-47.SUN Yong-ping,ZHOU Yi. Test and analysis on the condenser vacuum affected by the suction pressure of a water ring type vacuum pump[J]. Zhejiang Electric Power,2006(1):45-47.
[8] 安振龙.水环式真空泵叶轮汽蚀原因分析及处理[J].河南电力,2014(1):55-57.AN Zhen-long. Analyze and process the problem of cavitation of water ring vacuum pump impeller[J]. Henan Electric Power,2014(1):55-57.
[9] 陈维茂,荆延波,孙海波,等.水环真空泵抽饱和空气体积流量的计算公式推导及应用[J].真空,2015,52(5):18-20.CHEN Wei-mao,JING Yan-bo,SUN Hai-bo,et al. The derivation and application of calculation formula of saturated air volume flow by water ring vacuum pump[J].Vacuum,2015,52(5):18-20.
[10] 马汀山,蒋安,郄彦明,等.真空严密性与凝汽器漏入空气流量的定量关系[J].热力发电,2009,38(6):65-67.MA Ting-shan,JIANG An,QIE Yan-ming,et al. Quantitative relationship between the vacuum tightness and the leaking air flow rate into condenser[J]. Thermal power generation,2009,38(6):65-67.
[11] 干昌琦,田鹤年.凝汽器漏入空气里的计算与试验研究[J].电站辅机,2000(3):46-50.GAN Chang-qi,TIAN He-nian. Calculation and experimental study on leakage of condenser into air[J]. Auxiliary power station,2000(3):46-50.
[12] 张伟,杨文正,候伟军.凝汽器总体传热系数计算模型[J].电力科学与工程,2009,25(12):37-39.ZHANG Wei,YANG Wen-zheng,HOU Wei-jun. Calculation models of condenser overall heat transfer coefficient[J]. Electric Power Science and Engineering,2009,25(12):37-39.
[13] 董丽娟,张润盘,张春发,等.凝汽器压力变化对机组功率影响的研究[J].热力透平,2006,35(3):157-161.DONG Li-juan,ZHANG Run-pan,ZHANG Chun-fa,et al. Research of impact of condenser pressure variation on unit output[J].Thermal Turbine,2006,35(3):157-161.
[14] 董丽娟,张润盘,张春发. 凝汽器压力变化影响机组功率增量计算的研究[J].华北电力大学学报,2007,34(1):70-81.DONG Li-juan,ZHANG Run-pan,ZHANG Chun-fa. Effect of condenser pressure variation on unit power increment calculation[J]. Journal of North China Electric Power University,2007,34(1):70-81.
[15] 付昶,武学素.凝汽式汽轮机组背压变化对机组功率影响的研究[J].热力发电,1999(1):248-255.FU Chang,WU Xue-su. Study on the power variation due to the back pressure change of condensing turbine[J]. Thermal Power Generation, 1999(1):248-255.
[2] Heat Exchange Institute. Standards for steam surfacecondenser(11th edition)[S].
[3] 王标,李松波,徐峰.水环式真空泵节能技术改造措施探讨[J].热能动力工程,2017,32(1):113-116. WANG Biao,LI Song-bo,XU Feng. Improvement in energy saving technology for water ring vacuum[J].Journal of Engineering for Thermal Energy & Power,2017,32(1):113-116.
[4] 舒德衡,陈琛,贾珅.火力发电厂真空泵工作液补充冷却节能改造[J].安徽电力,2014,31(S1):12-15.SHU De-heng,CHEN Chen,JIA Shen. Reconstruction of supplementary cooling energy saving for vacuum pump working fluid in coal-fired powerplant[J]. Anhui electric power,2014,31(S1):12-15.
[5] 贺旭虎.火电厂汽侧真空泵密封水系统加装压缩制冷装置[J]东北电力技术,2009(4):34-36.HE Xu-hu.Compressed refrigerating machinery to be fixed on seal water system for vacuum pump at the steam side in power plant[J]. Northeast Power Technology,2009(4):34-36.
[6] 张代新,谢旭阳.水环真空泵工作水强行冷却的研究和应用[J].山东电力高等专科学校学报,2012,15(6):38-41.ZHANG Dai-xin,XIE Xu-yang.Research and application on water ring vacuum pump water forced cooling[J]. Journal of Shandong Electric Power College,2012,15(6):38-41.
[7] 孙永平,周轶.水环式真空泵抽吸能力对凝汽器真空影响的试验分析[J].浙江电力,2006(1):45-47.SUN Yong-ping,ZHOU Yi. Test and analysis on the condenser vacuum affected by the suction pressure of a water ring type vacuum pump[J]. Zhejiang Electric Power,2006(1):45-47.
[8] 安振龙.水环式真空泵叶轮汽蚀原因分析及处理[J].河南电力,2014(1):55-57.AN Zhen-long. Analyze and process the problem of cavitation of water ring vacuum pump impeller[J]. Henan Electric Power,2014(1):55-57.
[9] 陈维茂,荆延波,孙海波,等.水环真空泵抽饱和空气体积流量的计算公式推导及应用[J].真空,2015,52(5):18-20.CHEN Wei-mao,JING Yan-bo,SUN Hai-bo,et al. The derivation and application of calculation formula of saturated air volume flow by water ring vacuum pump[J].Vacuum,2015,52(5):18-20.
[10] 马汀山,蒋安,郄彦明,等.真空严密性与凝汽器漏入空气流量的定量关系[J].热力发电,2009,38(6):65-67.MA Ting-shan,JIANG An,QIE Yan-ming,et al. Quantitative relationship between the vacuum tightness and the leaking air flow rate into condenser[J]. Thermal power generation,2009,38(6):65-67.
[11] 干昌琦,田鹤年.凝汽器漏入空气里的计算与试验研究[J].电站辅机,2000(3):46-50.GAN Chang-qi,TIAN He-nian. Calculation and experimental study on leakage of condenser into air[J]. Auxiliary power station,2000(3):46-50.
[12] 张伟,杨文正,候伟军.凝汽器总体传热系数计算模型[J].电力科学与工程,2009,25(12):37-39.ZHANG Wei,YANG Wen-zheng,HOU Wei-jun. Calculation models of condenser overall heat transfer coefficient[J]. Electric Power Science and Engineering,2009,25(12):37-39.
[13] 董丽娟,张润盘,张春发,等.凝汽器压力变化对机组功率影响的研究[J].热力透平,2006,35(3):157-161.DONG Li-juan,ZHANG Run-pan,ZHANG Chun-fa,et al. Research of impact of condenser pressure variation on unit output[J].Thermal Turbine,2006,35(3):157-161.
[14] 董丽娟,张润盘,张春发. 凝汽器压力变化影响机组功率增量计算的研究[J].华北电力大学学报,2007,34(1):70-81.DONG Li-juan,ZHANG Run-pan,ZHANG Chun-fa. Effect of condenser pressure variation on unit power increment calculation[J]. Journal of North China Electric Power University,2007,34(1):70-81.
[15] 付昶,武学素.凝汽式汽轮机组背压变化对机组功率影响的研究[J].热力发电,1999(1):248-255.FU Chang,WU Xue-su. Study on the power variation due to the back pressure change of condensing turbine[J]. Thermal Power Generation, 1999(1):248-255.