超超临界机组中速磨煤机性能分析及其运行优化  

Performance Analysis and Optimization of Medium-speed Coal Pulverizers of Ultra Supercritical Units

作　　者：刘锋[1] 郭娟 

机构地区：[1]河南省节能监测中心,郑州市450008 [2]郑东新区热电有限公司,郑州市451464

出　　处：《电力建设》2011年第7期79-83,共5页Electric Power Construction

摘　　要：目前,直吹式制粉系统已经成为大型燃煤锅炉制粉系统的主要形式之一。探讨某电厂2×1000MW超超临界机组的锅炉配套制粉系统的性能,对磨煤机动态分离器转速特性、磨辊加载压力调整试验和磨煤机出力特性进行了数据分析;同时,对影响磨煤机出力和单耗的因素如磨煤机出口温度﹑通风量﹑磨碗差压等也进行研究,得出该磨煤机的经济运行参数,可以在保证合适的煤粉细度和均匀指数的情况下,提高制粉系统出力,降低制粉系统单耗,从而提高机组运行的经济性。The direct firing pulverizing system is dominant in the coal pulverizing system of large-scale coal boiler.The performance of pulverizing system is discussed matching with 2×1 000 MW ultra-supercritical boilers of a power plant.The speed characteristics of the dynamic separator,the adjustment test for grinding roll loading pressure and mill capacity characteristics are analyzed.Furthermore,the effects of mill outlet temperature,ventilation rates and grinding bowl differential pressure on mill capacity are investigated.As a result,the economic operation parameters for the coal pulverizer are obtained,that could enhance the output,reduce the single consumption and improve the running economy of the units under proper coal fineness and uniform index.

关 键 词：超超临界机组 直吹式制粉系统 磨煤机出力 动态分离器 性能优化 经济运行参数 

分 类 号：TM621.7[电气工程—电力系统及自动化]