减温水取水位置对机组热经济性的影响
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摘要
喷水减温作为电厂调节蒸汽温度的重要方式,其取水位置对机组热经济性的影响较大。基于"定流量法"变工况分析某200 MW机组过热器减温水、再热器减温水及其不同取水位置对机组热经济性的影响。结果表明:随着负荷的降低,过热器和再热器减温水对机组热经济性的影响均逐渐减小;相比于过热器减温水,再热器减温水对机组热经济性的影响更大;再热器减温水取水位置对机组热经济性的影响由低到高的顺序依次为高压加热器出口、给水泵出口和给水泵中间抽头。
Desuperheating spray is an powerful tool for power plant to adjust the steam temperature,and its water intake locations play greatly effects on the thermal economy. This paper presents the influence of water intake locations for superheater and reheater desuperheating water on the thermal economy in a 200 MW unit under variable operating condition based on "constant flow method". The results show that with the decrease of the load,the influence of both superheater and reheater desuperheating water on the unit thermal economy diminishes gradually. Compared to the superheater desuperheating water,the reheater desuperheating water plays greater impact on the unit thermal economy. The effect of the water intake locations for reheater desuperheating water increases gradually in following order: the outlet of high-pressure heater,the outlet of feed pump and then the inter-stage extraction of feed pump.
Desuperheating spray is an powerful tool for power plant to adjust the steam temperature,and its water intake locations play greatly effects on the thermal economy. This paper presents the influence of water intake locations for superheater and reheater desuperheating water on the thermal economy in a 200 MW unit under variable operating condition based on "constant flow method". The results show that with the decrease of the load,the influence of both superheater and reheater desuperheating water on the unit thermal economy diminishes gradually. Compared to the superheater desuperheating water,the reheater desuperheating water plays greater impact on the unit thermal economy. The effect of the water intake locations for reheater desuperheating water increases gradually in following order: the outlet of high-pressure heater,the outlet of feed pump and then the inter-stage extraction of feed pump.
引文
[1]郭迎利,严俊杰,何方.喷水减温对机组热经济性影响的研究[J].节能,2009(9):30-32.GUO Ying-li,YAN Jun-jie,HE Fang. Study on the influence of wa-ter spray temperature reduction on thermal economy of unit[J].Energy Conservation,2019(9):30-32.
[2]周兰欣,张淑侠,宫学敏,等.过热器喷水减温在给水管路上引出位置的再探讨[J].汽轮机技术,2005,2(47):87-90.ZHOU Lan-xin,ZHANG Shu-xia,GONG Xue-min,et al. Discus-sion again of the spray desuperheating location on feed water pipe-line[J]. Turbine Technology,2005,2(47):87-90.
[3]刘强.定功率下喷水减温对机组热经济性影响的数学模型[J].中国电机工程学报,2008,26(28):19-23.LIU Qiang. Mathematical model for the influcence of spray desu-perheating on thermal economy under conditions of constant poweroutput[J]. Proceedings of the CSEE,2008,26(28):19-23.
[4]杨海生,石瑞平.等效热降法中给水泵出口再热减温水对机组性能影响的再分析[J].汽轮机技术,2010,2(52):141-143.YANG Hai-sheng,SHI Rui-ping. New analysis on the impact offeedwater pump outlet reheat spray on overall unit efficiency by e-quivalent power output method[J]. Turbine Technology,2010,2(52):141-143.
[5]钱进,王冠伦,周开贵. 2 028 t/h锅炉减温水循环函数法计算与分析[J].热力发电,2009,3(38):34-39.QIAN Jin,WANG Guan-lun,ZHOU Kai-gui. Calculation and anal-ysis of desuperheating water for a 2028t/h boiler[J]. ThermalPower Generation,2009,3(38):34-39.
[6]庞可,潘诚.锅炉减温水对汽轮机组热经济性的影响[J].热力发电,2010,12(39):10-13.PANG Ke,PAN Cheng. Influence of boiler’s desuperheating waterupon thermal economic efficiency of steam turbine units[J]. Ther-mal Power Generation,2010,12(39):10-13.
[7]詹巍,刘吉臻,李艳君,等.火电机组减温水系统热经济性计算[J].华东电力,2011,39(6):964-967.ZHAN Wei,LIU Ji-zhen,LI Yan-jun,et al. Thermal economy cal-culation of desuperheating water system for the coal-fired power u-nit[J]. East China Electric Power,2011,39(6):964-967.
[8]杨海生,郭江龙,宋子顺.再热减温水流量对机组经济性的影响分析[J].华东电力,2006,34(9):73-76.YANG Hai-sheng,GUO Jiang-long,SONG Zi-shun. Influence of re-heater desuperheating water flow on economy of units[J]. EastChina Electric Power,2006,34(9):73-76.
[9]贾里,肖发齐,蔡新春,等. 300 MW和600 MW机组煤粉锅炉再热器改造[J].热力发电,2016,45(1):126-131.JIA Li,XIAO Fa-qi,CAI Xin-chun,et al. Retrofitting if reheatersin 300 MW and 600 MW unit pulverized coal boilers[J]. ThermalPower Generation,2016,45(1):126-131.
[10]李维特,黄保海.汽轮机变工况热力计算[M].北京:中国电力出版社,2001.LI Wei-te,HUANG Bao-hai. Thermal calculation for steam tur-bine under variable operating conditions[M]. Beijing:China E-lectric Power Press,2001.
[11]曹祖庆.汽轮机变工况特性[M].北京:水利电力出版社,1991.CAO Zu-qing. Characteristics of steam turbine under variable op-erating conditions[M]. Beijing:Water Resources and ElectricPower Press,1991.
[12]程东涛,马汀山,陈恺,等.低温省煤器对汽轮机组热力系统经济性影响研究[J].热能动力工程,2015,30(3):427-430.CHENG Dong-tao,MA Ting-shan,CHEN kai,et al. Study of theinfluence of a low temperature economizer on the thermal cost-ef-fectiveness of a steam turbine unit[J]. Journal of Engineering forThermal Energy and Power,2015,30(3):427-430.
[13]米兰,王文斌.基于支持向量回归机的汽轮机排汽焓预测研究[J].热能动力工程,2016,31(11):38-42.MI Lan,WANG Wen-bin. Study of the prediction of the exhauststeam enthalpy of a steam turbine based on the supporting vectorregress machine[J]. Journal of Engineering for Thermal Energyand Power,2016,31(11):38-42.
[14]韩旭,李恒凡,韩中合.关于汽轮机内湿蒸汽两相凝结流动的研究进展[J].热能动力工程,2016,31(5):1-6.HAN Xu,LI Heng-fan,HAN Zhong-he. Advances in the study ofthe wet steam two-phase condensation flow inside steam turbines[J]. Journal of Engineering for Thermal Energy and Power,2016,31(5):1-6.
[15]阎顺林,郭佳雷.汽轮机热力性能考核指标的通用方程[J].热能动力工程,2009,24(1):65-67.YAN Shun-lin,GUO Jia-lei. A general equation of indexes for ap-praising the thermodynamic performance of a steam turbine[J].Journal of Engineering for Thermal Energy and Power,2009,24(1):65-67.
[16] ASME PTC6-2004,汽轮机性能试验规程[S].ASME PTC6-2004,Steam Turbine Performance Test Code[S].
[2]周兰欣,张淑侠,宫学敏,等.过热器喷水减温在给水管路上引出位置的再探讨[J].汽轮机技术,2005,2(47):87-90.ZHOU Lan-xin,ZHANG Shu-xia,GONG Xue-min,et al. Discus-sion again of the spray desuperheating location on feed water pipe-line[J]. Turbine Technology,2005,2(47):87-90.
[3]刘强.定功率下喷水减温对机组热经济性影响的数学模型[J].中国电机工程学报,2008,26(28):19-23.LIU Qiang. Mathematical model for the influcence of spray desu-perheating on thermal economy under conditions of constant poweroutput[J]. Proceedings of the CSEE,2008,26(28):19-23.
[4]杨海生,石瑞平.等效热降法中给水泵出口再热减温水对机组性能影响的再分析[J].汽轮机技术,2010,2(52):141-143.YANG Hai-sheng,SHI Rui-ping. New analysis on the impact offeedwater pump outlet reheat spray on overall unit efficiency by e-quivalent power output method[J]. Turbine Technology,2010,2(52):141-143.
[5]钱进,王冠伦,周开贵. 2 028 t/h锅炉减温水循环函数法计算与分析[J].热力发电,2009,3(38):34-39.QIAN Jin,WANG Guan-lun,ZHOU Kai-gui. Calculation and anal-ysis of desuperheating water for a 2028t/h boiler[J]. ThermalPower Generation,2009,3(38):34-39.
[6]庞可,潘诚.锅炉减温水对汽轮机组热经济性的影响[J].热力发电,2010,12(39):10-13.PANG Ke,PAN Cheng. Influence of boiler’s desuperheating waterupon thermal economic efficiency of steam turbine units[J]. Ther-mal Power Generation,2010,12(39):10-13.
[7]詹巍,刘吉臻,李艳君,等.火电机组减温水系统热经济性计算[J].华东电力,2011,39(6):964-967.ZHAN Wei,LIU Ji-zhen,LI Yan-jun,et al. Thermal economy cal-culation of desuperheating water system for the coal-fired power u-nit[J]. East China Electric Power,2011,39(6):964-967.
[8]杨海生,郭江龙,宋子顺.再热减温水流量对机组经济性的影响分析[J].华东电力,2006,34(9):73-76.YANG Hai-sheng,GUO Jiang-long,SONG Zi-shun. Influence of re-heater desuperheating water flow on economy of units[J]. EastChina Electric Power,2006,34(9):73-76.
[9]贾里,肖发齐,蔡新春,等. 300 MW和600 MW机组煤粉锅炉再热器改造[J].热力发电,2016,45(1):126-131.JIA Li,XIAO Fa-qi,CAI Xin-chun,et al. Retrofitting if reheatersin 300 MW and 600 MW unit pulverized coal boilers[J]. ThermalPower Generation,2016,45(1):126-131.
[10]李维特,黄保海.汽轮机变工况热力计算[M].北京:中国电力出版社,2001.LI Wei-te,HUANG Bao-hai. Thermal calculation for steam tur-bine under variable operating conditions[M]. Beijing:China E-lectric Power Press,2001.
[11]曹祖庆.汽轮机变工况特性[M].北京:水利电力出版社,1991.CAO Zu-qing. Characteristics of steam turbine under variable op-erating conditions[M]. Beijing:Water Resources and ElectricPower Press,1991.
[12]程东涛,马汀山,陈恺,等.低温省煤器对汽轮机组热力系统经济性影响研究[J].热能动力工程,2015,30(3):427-430.CHENG Dong-tao,MA Ting-shan,CHEN kai,et al. Study of theinfluence of a low temperature economizer on the thermal cost-ef-fectiveness of a steam turbine unit[J]. Journal of Engineering forThermal Energy and Power,2015,30(3):427-430.
[13]米兰,王文斌.基于支持向量回归机的汽轮机排汽焓预测研究[J].热能动力工程,2016,31(11):38-42.MI Lan,WANG Wen-bin. Study of the prediction of the exhauststeam enthalpy of a steam turbine based on the supporting vectorregress machine[J]. Journal of Engineering for Thermal Energyand Power,2016,31(11):38-42.
[14]韩旭,李恒凡,韩中合.关于汽轮机内湿蒸汽两相凝结流动的研究进展[J].热能动力工程,2016,31(5):1-6.HAN Xu,LI Heng-fan,HAN Zhong-he. Advances in the study ofthe wet steam two-phase condensation flow inside steam turbines[J]. Journal of Engineering for Thermal Energy and Power,2016,31(5):1-6.
[15]阎顺林,郭佳雷.汽轮机热力性能考核指标的通用方程[J].热能动力工程,2009,24(1):65-67.YAN Shun-lin,GUO Jia-lei. A general equation of indexes for ap-praising the thermodynamic performance of a steam turbine[J].Journal of Engineering for Thermal Energy and Power,2009,24(1):65-67.
[16] ASME PTC6-2004,汽轮机性能试验规程[S].ASME PTC6-2004,Steam Turbine Performance Test Code[S].