Abstract: The fourth generation grate cooler of SCLW4-12×13.4 was adopted in 4500t/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.
