外高桥第三发电厂给水泵配置方案优化 .docx

工程建筑学相关资料ENGINEERING ARCHITECTURE RELATED INFORMATION 工程建筑学相关资料 ENGINEERING ARCHITECTURE RELATED INFORMATION PAGE PAGE 1 外高桥第三发电厂给水泵配置方案优化  摘要：阐述了百万等级超超临界汽轮发电机组锅炉给水泵配置优化对提高机组运行经济性和安全性方面的重要意义。分析了国内外大机组的给水系统设备配置及运行情况以及外高桥三期工程采用100%锅炉给水泵组、自带凝汽器、取消电动给水泵的背景。介绍了外高桥三期工程给水泵汽轮机的特殊配汽机构型式、特殊转子焊接技术及系统汽源配置情况，确保机组在暂态工况发生时，驱动汽源的安全顺利切换，同时汽源的设置兼顾机组长期运行的经济性。分析了防止给水泵汽蚀的措施，以及现场设备的布置对安全运行及降低造价的重要意义，介绍了机组调试过程中给水泵组全程调速的成功实施，为百万等级汽轮机组超超临界技术发展创造了有利条件。 Abstract: This study presents the significance in improving the unit operation economy and security through the optimization of boiler feedwater pump configuration in 1000MW class ultra-supercritical power generation units. It analyzes the facility configuration and operation status of the feedwater system in large power generation units of our country and overseas， and states the background of applying 1X100% boiler feedwater pump set， its turbine with its own condenser， and canceling the motor driven feedwater pump in Waigaoqiao Phase 3 project. It introduces the special steam inlet configuration of boiler feedwater pump turbine， the special welding rotor technology and the steam system design. This design can ensure the steam safe changeover when the unit is at the transient condition and at the same time consider the unit long time efficient operation with this steam supply. It also displays the measures of avoiding the pump cavitations and the significance of safe running and investment reducing by the equipment layout on site. It introduces the successful implementation of the pump set full speed range operation during the unit commissioning， this establishes the advantaged condition for the development of 1000MW power generation units.关键词： 1000MW，超超临界，FCB，给水泵，给水泵汽轮机 Keyword: 1000MW， Ultra-supercritical， FCB， Boiler Feedwater Pump， Boiler Beedwater Pump Turbine0．引言 上海外高桥第三发电有限责任公司（下称：外高桥三期工程）建设两台1000MW超超临界火力发电机组，其锅炉为超超临界一次中间再热、燃煤直流塔式锅炉。主要参数为：蒸发量2955t/h；主蒸汽温度/压力：605℃/28MPa；再热蒸汽温度/压力：603℃/6.4MPa。汽轮机为四缸四排汽、单轴反动凝汽式双背压汽轮机。额定功率1000MW，最