Circulatingfluidizedbed(CFB)boilerIntroduction循环流化床.doc

循环流化床(CFB)电站锅炉简介Circulating fluidized bed (CFB) boiler Introduction　　1　循环流化床（CFB）锅炉技术介绍A circulating fluidized bed (CFB) boiler technology introduced 　　1．1 基本设备1.1 Basic equipment 　　循环流化床锅炉包括本体设备和辅助系统两部分。CFB锅炉本体由炉膛及布风装置、循环灰分离器、回料阀、尾部受热面竖井烟道及可以加置的外置式循环灰换热器组成。CFB boiler including body systems auxiliary equipment two parts. CFB body are compose of boiler furnace and air distribution device, loop ash separator, return valve, silo flue of heating surface and external circulating ask heat exchanger.　　循环流化床锅炉主要辅助系统包括风烟系统、煤制备系统、石灰石制备系统、灰渣处理系统、燃油点火启动系统、热控系统。 　he main auxiliary systems of circulating fluidized bed boiler system including Wind and Smoke, coal preparation system, limestone preparation system, ash handling system, fuel ignition system, thermal control systems.　　1．2 技术流派1.2 Technical Schools　　目前，世界上循环流化床锅炉的主要炉型为：德国Lurgi型、芬兰Pyroflow型、美国FW型、德国Circofluid型和内循环型。 　　Currently, the worlds major circulating fluidized bed boiler furnace are: the German-based Lurgi, Finland Pyroflow type, United States FW type, Germany Circofluid type and circular type.　　1．3 主要技术性能 　1.3 Main technical performance　　依燃用煤种不同，循环流化床锅炉燃烧效率约为97％～ 99％，锅炉热效率约为90％～91％，蒸汽参数已达亚临界。循环流化床锅炉具有优良的低负荷(30％MCR)运行能力，适合电网负荷调峰。According to different burning coal, circulating fluidized bed boiler combustion efficiency is about 97% ~ 99%, the boiler thermal efficiency is about 90% to 91%, the critical steam parameters have been subcritical. Circulating fluidized bed boiler has an excellent low load (30% MCR) operation capability, suitable for power grid load peaking.　　循环流化床燃烧技术具有以下特点：气固混合很好；燃烧速率高，特别是对粗颗粒燃料；绝大部分未燃尽的燃料被再循环至炉膛，因而其燃烧效率可与煤粉炉相媲美，通常达到97.5％～99.5％。 Circulating fluidized bed combustion technology has the following characteristics: good gas-solid mixture; burning rate is high, especially for coarse particles of fuel; most of the unburned fuel to be recycled to the furnace, which may be pulverized coal combustion efficiency comparable, usually 97.5% ~ 99.5%.　　2 国内外CFB锅炉的发展和应用2 domestic