The influence of burner position on kiln condition and its adjustment

The influence of burner position on kiln condition and its adjustment
When the burner is installed, its center point is in the same position as the center point of the kiln section when it is in a horizontal position. Before each maintenance is completed, the position of the burner must be checked and verified. When production is normal, the correct position of the burner and the method for adjusting the burner are:1、 Determine if the burner position is correct and adjust the burner method.1. From the perspective of the kiln, the shape of the flame should be complete, powerful, and lively, without corroding the kiln skin, and should not be used for top material calcination. The outer flame of the flame should come into contact with the materials carried in the kiln. If the burner position is too high, the flame will wash away the kiln skin, causing the local temperature of the furnace to be too high, reducing the service life of the kiln lining. Moreover, the kiln skin of the firing belt will extend backwards, and the thermal system inside the kiln will be disordered. In severe cases, the kiln will turn red shortly after feeding. At this point, the direction of the burner close to the material should be adjusted appropriately, so that the outer flame of the flame comes into contact with the material. If the position of the burner is too close to the material inlet, the flame will cause the material to hold up, resulting in incomplete combustion of coal powder and rolled up material wrapped in the furnace, causing a severe reduction atmosphere and reducing the quality of the clinker. Gas with severe atmosphere reduction enters the preheater system, reducing the temperature of the liquid phase of the material, causing the preheater system to scale or even block, affecting the normal forging of the kiln. The distance between the burner and the material should be adjusted appropriately to make the flame smooth and strong.2. Looking at the scanned images of the central control cylinder, it is more intuitive and convenient.(1) The kiln skin of the firing zone should be between 20-25m (the kiln skin of the small kiln should be shorter, and the kiln skin of the large kiln should be longer), with a uniform temperature distribution throughout the body and no high temperature points. The temperature should be between 300-350 ℃, and the temperature of the transition zone should be around 350 ℃. At this time, the flame is complete, lively, and smooth. The position of the burner is relatively suitable, and the fired clinker is also in an ideal state.(2) The temperature in the front is relatively high, while the temperature in the back part of the firing zone is normal, indicating that the burner is far away from the material, or the flame has forked and dispersed, and the firepower is not concentrated. The treatment method is to open a material piercing hole on the side of the kiln head cover, and clean it regularly with manual or conditional air guns every shift. If any problems are found, they should be dealt with in a timely manner, otherwise it will affect the yield and quality of the clinker. Adjust the flame shape and leave a small amount of black flame at the base of the flame to avoid excessive flame temperature.3. After burning, the temperature is too high, especially after the 2nd wheel, and even reaches 380 ℃ or above, indicating that the burner is at a high position on the y-axis.4. The temperature of the firing zone is relatively low, and the temperature of the transition zone is not high, indicating that the furnace skin of the firing zone is relatively thick, too close to the material mouth, and the fire is not smooth. When it is penetrated into the material, yellow core material appears after the clinker is crushed. 2、 Adjust normal and abnormal situations.In general, if the temperature of the firing zone in the kiln is low, the inner air butterfly valve should be opened larger and the outer air butterfly valve should be closed smaller to shorten the flame and increase the temperature in front of the kiln. When the temperature of the firing zone is high, the outer air valve should be opened larger and the inner air butterfly valve should be closed smaller to extend the flame, maintain a certain kiln fast rotation rate, and improve the yield and quality of clinker.If the kiln skin is found to be too thick or agglomerated, it should be dealt with in a timely manner, otherwise it will affect the output and quality of the clinker, causing all burners to enter the kiln, the outer air butterfly valve to be fully opened, the inner air butterfly valve to be less opened, and the central air door to be opened larger to make the flame longer, the firing belt to be moved back, and the ring temperature to be increased. If a flat block material is found, it indicates that the back ring has fallen off. The burner should be fully retreated to the kiln mouth position, the outer air butterfly valve should be closed, and the inner air butterfly valve should be opened, The central air butterfly valve should also be turned down, the flame should be shortened, the kiln speed should be increased, the granulation temperature of the clinker should be controlled, and the shell with the kiln should be protected during firing. Due to the many factors involved in ring formation, specific analysis should be conducted based on the kiln type and ring structure. As long as the method is reasonable, it is not difficult to handle.