1. The production capacity of the coal mill is low, and the detection judgment is that the feeding speed is low, the grinding pressure is low, and the system air volume is low. Increase the feeding rate, increase the grinding pressure, and adjust the system air volume.

　　2. The coal mill product is too coarse, and the detection judgment is that the powder selection efficiency is low, the system air volume is too large, and the grinding pressure is low. Increase the speed of the powder selector, adjust the system air volume, and increase the grinding pressure.

　　3. The vibration of the grinder is too high, and the detection indicates that the feeding is uneven, the material layer of the grinding disc is too thin, the internal circulation is too large, and metal parts enter the grinder. Uniform feeding, adjust feeding speed or reduce grinding pressure, appropriately reduce the speed of the powder selector (but ensure product fineness), check whether the metal detector and magnetic separator are working properly.

　　4. The pressure difference of the mill air ring is too large, and the detection judgment is that the grinding pressure is low, the feeding amount is high, and the product is too fine. The adjustment method is to increase the grinding pressure, reduce the feeding rate, and lower the speed of the powder selector.

　　5. The pressure difference of the mill air ring is too small, and the detection judgment is that the feeding rate is low and the product is too coarse. Adjust the processing method to gradually increase the feeding rate and increase the speed of the powder selector.

　　6. The moisture content of the coal powder is high, and the detection indicates that the temperature of the grinding gas is low. Adjust the processing method to increase the temperature of the grinding gas and reduce coal feeding.

　　7. Excessive slag discharge is detected and judged to be due to excessive feeding volume, large particle size of grinding material, low grinding pressure, insufficient ventilation of the system, damage, wear or blockage of the nozzle ring, and wear of the material blocking ring. The adjustment method is to reduce feeding, lower the particle size of the grinding material, adjust the grinding pressure, increase ventilation, stop grinding for repair or replacement, clear blockages, stop grinding for repair or replacement.

　　8. The dust collection effect of the bag filter is poor. The detection judgment is that the dust content in the exhaust gas from the chimney is high. The adjustment method is to check whether the filter bag of the bag filter is damaged or stuck in the bag; Check the system for air leakage and verify if the pressure difference between the inlet and outlet gases of the bag filter is too high.

　　9. The outlet temperature of the bag dust collector is too high, and the detection judgment is that the bag dust collector ash hopper has accumulated and self ignited, with a large amount of hot air and a small opening of the grinding head cold air valve. Adjust the handling method to promptly notify the on-site handling, extinguish the fire with CO2 and close the inlet valve of the high-temperature induced draft fan, and then increase the opening of the cold air valve.

　　10. The oil temperature in the thrust pad oil pool of the reducer exceeds the normal value, and it is determined through testing that the oil supply is insufficient. The cooling effect of the oil cooler is poor, and water has entered the oil cooler, which is affected by a hot air leak from the sealing part of the machine base. The adjustment method is to check the flow rate of the oil pump, whether the valve is throttling, whether the oil distribution pipe is blocked, check the cooling water valve and cooling water volume, check whether the copper pipe inside the oil cooler is blocked and scaled, and deal with air leakage.

　　11. The temperature of the bag dust collector ash hopper is too high, which is manifested as ash accumulation and ash hopper catching fire. Notify the site for handling or stop the machine to extinguish the fire.