万吨级回转窑的升级改造及设备维护

Upgrade and Equipment Maintenance of 10000t/d Rotary Kiln

某万吨水泥熟料生产线采用国外进口ϕ6m×90m回转窑设备,存在中间档基础振动,托轮和轮带表面有波浪纹,中间档附近耐火砖易脱落,窑速受限等问题。通过对中间档轮带和挡轮进行返厂加工,更换减薄及变形严重的窑筒体段节,重新调正窑筒体中心线,解决了上述问题。通过整体更换回转窑传动装置,提高了主电机功率和窑的运行转速;增加了窑门罩截面积,配置了最新结构的窑尾密封装置、绞链式窑门、托轮轴承组强制循环润滑冷却装置及轮带下垫板自动喷射润滑系统,改善了设备的密封和润滑效果,更好地保障了设备的长期稳定运行。升级改造后,回转窑设备运行稳定,实现了改造目标。

This ϕ6m×90m rotary kiln equipment was imported from abroad for the 10000t/d cement clinker production line.There were problems such as vibration at the middle foundation,wave veins on the surface of the supporting roller and tyre,easy falling of refractory bricks near the middle support,and limited kiln speed.The above problems were solved by returning the tyre and thrust roller to the factory for processing,replacing the kiln shell sections of serious thinning and deformation,and realigning the center line of the kiln shell.The driving device of the rotary kiln was replaced,which improved the power of the main motor and the running speed of the kiln.The cross section of kiln hood is increased.The kiln was equipped with the optimized inlet sealing device,hinged kiln hood door,forced circulating lubrication and cooling device for supporting roller bearing,and automatic spray lubrication system for the pads under the tyre.The sealing and lubrication effect have been improved,and the long-term stable operation have been better guaranteed.After upgrade,the rotary kiln equipment runs stably and the transformation goal is achieved.