高压变频器在风扇磨煤机上的应用  

Application of High Voltage Frequency Converter in Fan Coal Mill

作　　者：杜庆彪 Du Qingbiao

机构地区：[1]东方日立(成都)电控设备有限公司营销中心

出　　处：《变频器世界》2021年第10期76-79,共4页The World of Inverters

摘　　要：风扇磨煤机可以把干燥、输送、燃烧及一次风的供给等几种工艺过程一次完成,可按需要自动控制煤量的供给,体积小,工艺布置适应性强。与辐磨机、球磨机相比,风扇磨煤机因其转速较高,更适合配置全功率变頻器长期变频运行,具有显著的节能效果。由于风扇磨煤机存在带料重载启动的情况,与风机水泵类负载具有明显不同的启动运行特性,在以往的风扇鹰煤机变频器选型中往往模据工程经验值预估变频器容量,存在较大的容量误差,估值过大容易造成容量浪费,估值过小又导致风房磨煤机在重载情况下启动困难。鉴于上述情况,本文以锡林郭勒热电有限公司北方胜利电厂2×66万千瓦机组风扇磨煤机为例,根据风扇磨煤机的运行特性,着重于变频设备的配置及选型计算。Fan mill can dry,transport,combustion and air supply and other several processes completed at a time,according to the need for automatic control of coal supply,small volume,strong adaptability of process layout.Compared with roller mill and ball mill,fan mill is more suitable for long-tem frequency conversion operation with full-power frequency converter because of its high speed,which has significant energy-saving effect.Due to the condition of the belt material overloading start fan mill,and the fan pump load has obvious different start running characteristics,in the fan frequency converter mill type selection of the past often estimate frequency converter capacity according to engineering experience,there is a big capacity of the error,valuations are too easy to cause waste capacity,valuation is too small and cause the fan mill in the case of overloading starting difculty.In view of the above situation,this paper takes the fan mill of 2x 660.000 kW unit of North Shengli Power Plant of Xin Gol Thermal Power Co.,LTD as an example,and focuses on the configuration and selection calculation of frequency conversion equipment according to the operation characteristics of the fan mill.

关 键 词：风扇磨煤机 转动惯量 重载启动 移相变压器 

分 类 号：TN773[电子电信—电路与系统]