煤磨热风管道改造的效果

中联万基水泥有限公司4500t/d熟料生产线采用SCLW4-12×13.4第四代篦冷机,煤磨热风取风口和余热发电AQC热风取风口在篦冷机同一对称位置,煤磨与余热发电系统存在争风现象,开停煤磨对余热发电系统影响较大。通过从废气管道处开孔,加装管道和电动阀,与热风管道汇合通往煤磨沉降室,调整相应阀门开度,可以控制入煤磨烟气温度,这样不但提高了余热发电量,而且提高了煤磨产量,同时也降低了窑头排风机的负荷,降低了熟料生产电耗。

Effect of Coal Mill Hot Air Pipeline Reconstruction

The fourth generation grate cooler of SCLW4-12×13.4 was adopted in 4500 t/d clinker production line of China United Cement Xin’an Wanji Cement Co.,Ltd.,but the hot air intake of coal mill and the AQC hot air intake of waste heat power generation were in the same symmetrical position of the grate cooler.There was a phenomenon of air struggle between the coal mill and the waste heat power generation system,and the start and stop of coal mill had a great impact on the waste heat power generation system.After analysis,measures were taken to upgrade the system.The flue gas temperature of the coal mill can be controlled by opening a hole from the waste gas pipe,installing a pipe and an electric valve,and connecting with the hot air pipe to the coal mill settling chamber,and adjusting the opening of the corresponding valve.This not only improves the power generation of waste heat and increases the output of the coal mill,but also reduces the load of the exhaust fan at the kiln head and the power consumption of clinker production.