MB型风扇磨煤机提升压头影响因素分析  

Analysis on factors affecting the promotion pressure head of MB fan mill

作　　者：刘家利[1] 杨忠灿[1] 贾晓艳 何仰鹏[1] 王桂芳[1] 王志超[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]西安益通热工技术服务有限责任公司,陕西西安710032

出　　处：《热力发电》2017年第10期111-118,共8页Thermal Power Generation

基　　金：中国华能集团公司总部科技项目(HNKJ15-H11);国家能源应用技术研究及工程示范项目资助(NY20130303)~~

摘　　要：本文通过在MB型风扇磨煤机上的冷态和热态测试,得到了在纯空气和带粉状态下磨煤机的通风量、出力、入口负压、出口压力及提升压头之间的相关性,分析了MB型风扇磨煤机提升压头的各种影响因素,得到磨煤机的出力、通风量以及煤的可磨性指数等关键指标对MB型风扇磨煤机提升压头的影响规律。结果表明:冷态试验时随着磨煤机出口通风量的升高,磨煤机入口阻力降低、出口阻力升高,且磨煤机出口阻力升高幅度大于入口阻力降低幅度,因此磨煤机提升压头下降;热态试验时磨煤机提升压头随着磨煤机出口通风量的增加而升高,且磨煤机出力增加对提升压头的负向作用大于目前的计算方法;MB型风扇磨煤机通风特性和研磨特性与现有的S型风扇磨煤机有较大不同但又具有一定相似性。该结论可为MB型风扇磨煤机设计和运行提供参考。Through the cold and hot state tests on the MB type fan mill, the correlation among ventilation volume, mill output, negative pressure of the entrance, pressure of the mill outlet and the promotion pressure head in pure air and air with coal powder states was obtained, and the factors affecting the promotion pressure head of the MB type fan mill were investigated, thus the effects of key indexes such as mill output, ventilation volume and HGI index of the coal on the MB type fan mill＇s promotion pressure head were obtained. The cold test results show that, with the increase of mill outlet ventilation, the mill entrance resistance decreased, the outlet resistance increased, and the increase of the mill outlet resistance was larger than the decrease of the entrance resistance, so the promotion pressure head of the mill declined. The hot test results show that, the promotion pressure head of the mill increased with the mill outlet ventilation, and the negative effect of the mill output on the promotion pressure head was greater than the results calculated by current calculation method. The ventilation and grinding characteristics of the MB type fan mill has great difference but with a certain similarity with that of the S type fan mill. The conclusion can provide technical reference for design and operation of the MB type mill.

关 键 词：MB型风扇磨煤机 褐煤 通风量 出力 提升压头 通风特性 研磨特性 修正系数 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程] TK229.6