HRM3400B生料立磨的节能改造

Energy Saving Transformation of HRM3400B Raw Material Vertical Mill

某5000t/d水泥熟料生产线HRM3400B生料立磨系统存在耗电量高、阻力大、运行效率低、入磨物料综合水分高、系统漏风点多、漏风量大等问题。通过优化旋风筒进风口结构,加高旋风筒进风口及上壳体,加长旋风筒内筒,新增热风管道,增大入磨溜子角度,在排渣皮带机尾部增设缓冲箱,将磨辊密封罩更换为内部迷宫式新型密封罩,拆除旋风筒下部压力铰刀并更换为无动力翻板阀,将收尘器气缸全部更换为不锈钢材质等措施,生料立磨磨机压差降低183Pa,在线窑尾废气氧含量降低1.8%~2.0%,磨机电耗由16.33kW∙h/t降至13.70kW∙h/t,有效降低了生产成本,改造效果显著。

There are some problems in HRM3400B raw meal vertical grinding system of a 5000t/d cement clinker production line,such as high power consumption,high resistance,low operation efficiency,high comprehensive moisture content of grinding materials,many air leakage points of the system,large air leakage and so on.And then it are upgraded by optimizing the structure of cyclone inlet,heightening the inlet and upper shell of whirlwind cylinder,lengthening the inner cylinder of whirlwind cylinder,adding hot air pipe,increasing the angle of grinding sliver,adding buffer box at the end of slag discharge belt conveyor,replacing the grinding roller seal cover with a new type of internal labyrinth seal cover,removing the lower pressure reamer of cyclone tube and replacing it with unpowered flip plate valve,replacing all the dust collector cylinders with stainless steel materials,etc.After revamping,the pressure difference of raw meal vertical grinding machine is reduced by 183Pa,the oxygen content of waste gas at the end of online kiln is reduced by 1.8%and 2.0%,and the power consumption of mill is reduced from 16.33kW∙h/t to 13.70kW∙h/t.The production cost is effectively reduced and the transformation effect is remarkable.