1000MW二次再热超超临界机组再热汽温控制策略及工程应用
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摘要
通过分析锅炉各调温手段对再热汽温的影响,提出了一种1 000 MW二次再热超超临界机组再热汽温控制方案,从锅炉吸热面布置、摆动燃烧器喷嘴、烟气挡板、一、二次再热器微量喷水减温器、一、二次再热器事故喷水减温器方面做出了设计说明,介绍了某1 000 MW二次再热超超临界机组一、二次再热汽温控制回路的设计及主、再热汽温控制的解耦方法,实践证明本控制方案应用效果良好。
Through the analysis on the effects of the temperature control methods on the reheat steam temperature, a reheat steam temperature control strategy for the 1 000 MW double-reheat ultra-supercritical unit is proposed and illustrated from the aspects of the boiler heating surface arrangement, the swinging burner nozzle, the flue gas damper, the micro water spray desuperheaters and emergency water spray desuperheaters for both the primary and the secondary reheaters. Then the structure of the primary and the secondary reheater steam temperature control circuits of a 1 000 MW unit is presented with the superheat and reheat steam temperature decoupling method also being introduced. The practical operation has proved that this control strategy has good application effects.
Through the analysis on the effects of the temperature control methods on the reheat steam temperature, a reheat steam temperature control strategy for the 1 000 MW double-reheat ultra-supercritical unit is proposed and illustrated from the aspects of the boiler heating surface arrangement, the swinging burner nozzle, the flue gas damper, the micro water spray desuperheaters and emergency water spray desuperheaters for both the primary and the secondary reheaters. Then the structure of the primary and the secondary reheater steam temperature control circuits of a 1 000 MW unit is presented with the superheat and reheat steam temperature decoupling method also being introduced. The practical operation has proved that this control strategy has good application effects.
引文
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[11]夏良伟.二次再热锅炉参数特点及汽温控制[J].锅炉制造,2015(1):5-7,11.XIA Liangwei.Parameter and steam temperature adjustment for the boiler with double reheat[J].Boiler Manufacturing,2015(1):5-7,11.
[12]赵志丹,郝德锋,王海涛,等.二次再热超超临界机组再热蒸汽温度控制策略[J].热力发电,2015,44(12):113-118.ZHAO Zhidan,HAO Defeng,WANG Haitao,et al.Double reheat ultra-supercritical unit reheat steam temperature control[J].Thermal Power Generation,2015,44(12):113-118.
[13]上海锅炉厂有限公司.7050-1-8618锅炉调节控制系统基本技术要求[R].2013.
[2]蔡宁生,章名耀.PFBC-CC发电技术的进展及创新发展[J].东南大学学报(自然科学版),2002,32(3):437-442.CAI Ningsheng,ZHANG Mingyao.Progress and innovative development for PFBC-CC technology[J].Journal of Southeast University(Natural Science Edition),2002,32(3):437-442.
[3]徐炯,周一工.700℃高效超超临界技术的发展[J].中外能源,2012,17(6):13-17.XU Jiong,ZHOU Yigong.The development of 700℃USC technology[J].Sino-Global Energy,2012,17(6):13-17.
[4]朱军.1 000 MW二次再热超超临界机组技术特点及经济性[J].电力勘测设计,2013(6):24-29.ZHU Jun.Technical characteristics and economy of 1 000 MW ultra-supercritical unit with double reheat cycles[J].Electric Power Survey&Design,2013(6):24-29.
[5]李秀云,严俊杰,张春雨,等.外置式蒸汽冷却器机组热力系统定量分析方法[J].中国电机工程学报,2001,21(1):35-39.LI Xiuyun,YAN Junjie,ZHANG Chunyu,et al.Economic diagnosis method of thermal system with outer steam cooler[J].Proceedings of the CSEE,2001,21(1):35-39.
[6]邵树峰,严俊杰,刘继平,等.二次再热机组热力系统的定量分析[J].西安交通大学学报,2003,37(11):1137-1141.SHAO Shufeng,YAN Junjie,LIU Jiping,et al.Thermo-economics analysis method of thermal system for power unit with double reheat[J].Journal of Xi’an Jiaotong University,2003,37(11):1137-1141.
[7]谷雅秀,王生鹏.一种超超临界二次再热发电系统及其热经济性分析[J].西安理工大学学报,2013,29(3):357-361.GU Yaxiu,WANG Shengpeng.Thermal economic analysis of a double reheat ultra supercritical pressure unit[J].Journal of Xi’an University of Technology,2013,29(3):357-361.
[8]林万超.火电厂热系统节能理论[M].西安:西安交通大学出版社,1994.
[9]张永波.超超临界二次再热机组汽温控制策略研究[D].北京:华北电力大学,2014.
[10]刘长良,张永波.二次再热机组汽温联合控制策略仿真[J].自动化与仪表,2013(11):25-29.LIU Changliang,ZHANG Yongbo.Simulation of combined control strategy of steam temperature of double reheat unit[J].Automation and Instrumentation,2013(11):25-29.
[11]夏良伟.二次再热锅炉参数特点及汽温控制[J].锅炉制造,2015(1):5-7,11.XIA Liangwei.Parameter and steam temperature adjustment for the boiler with double reheat[J].Boiler Manufacturing,2015(1):5-7,11.
[12]赵志丹,郝德锋,王海涛,等.二次再热超超临界机组再热蒸汽温度控制策略[J].热力发电,2015,44(12):113-118.ZHAO Zhidan,HAO Defeng,WANG Haitao,et al.Double reheat ultra-supercritical unit reheat steam temperature control[J].Thermal Power Generation,2015,44(12):113-118.
[13]上海锅炉厂有限公司.7050-1-8618锅炉调节控制系统基本技术要求[R].2013.