Influence Of Burner Position On Kiln Condition And Condition Adjustment
Influence Of Burner Position On Kiln Condition And Condition Adjustment
When the burner is installed, its center point is at the same position as the center point of the kiln section when it is in the horizontal position. Before each maintenance, the burner position should be checked and verified. When the production is normal, the method to determine the correct position of the burner and adjust the burner is as follows:
First: Determine whether the burner position is correct and adjust the burner
1. From the perspective of the kiln, the shape of the flame should be complete, powerful, and active, not corroding the kiln skin, not burning with top materials. The outer flame of the flame contacts the materials carried in the kiln. If the burner position is too high, the flame will wash to the kiln skin. The local temperature of the furnace is too high, reducing the service life of the kiln lining, and the kiln skin of the burning belt will extend backward. The thermal system in the kiln is disordered. In serious cases, the feeding will soon red the kiln. At this time, properly adjust the direction of the burner close to the material to make the outer flame of the flame contact the material. If the burner position is too close to the feed opening, the flame will make the material hold up, resulting in incomplete combustion of pulverized coal, and rolled-up materials wrapped in the furnace, making the reducing atmosphere serious and reducing the clinker quality. The gas with a severe reducing atmosphere enters the preheater system to reduce the temperature of the liquid phase of the material, which causes the preheater system to scale or even block, affecting the normal burning of the furnace. The distance between the burner and the material should be properly adjusted to make the flame smooth and powerful.
2. From the scanning image of the central control cylinder, it is more intuitive and simple.
(1) The kiln skin of the burning zone should be 20-25m (the kiln skin of the small kiln is shorter, and the kiln skin of the large kiln is longer). The overall temperature distribution is uniform, there is no high-temperature point, the temperature is 300-350 ℃, and the overall temperature of the transition zone is about 350 ℃. At this time, the flame is complete, lively, and smooth. The position of the burner is suitable, and the clinker fired is also ideal.
(2) The temperature in the front is high, while the temperature in the back of the burning belt is normal, which indicates that the burner is far away from the material, or the flame has split and dispersed, and the firepower is not concentrated. The treatment method is to open a poke hole at the side of the kiln head cover. Each shift uses a manual or conditional air gun to clean regularly. If problems are found, they should be handled in time, otherwise, the clinker output and quality will be affected. Adjust the flame shape to keep a little black tip at the root of the flame to avoid excessive flame temperature.
3. After belt burning, the temperature is relatively high, especially after the No. 2 wheel, which even reaches above 380 ℃, indicating that the burner is at a high position on the y-axis.
4. The lower temperature of the burning zone and the lower temperature of the transition zone indicate that the furnace skin of the burning zone is relatively thick, too close to the material mouth, and the fire is not smooth. It is bound into the material, and yellow core material appears after the clinker is broken.
Second: Adjust the normal and abnormal conditions
In general, if the temperature of the burning zone in the kiln is low, open the large internal air butterfly valve to open it, and close the small external air butterfly valve to shorten the flame and increase the temperature in front of the kiln. When the temperature of the burning zone is high, open the large external air valve and close the small internal air butterfly valve to extend the flame, maintain a certain fast kiln rotation rate, and improve the clinker output and quality.
If the kiln skin is found to be too thick or caked, it should be handled in a timely manner, otherwise, it will affect the output and quality of clinker, so that all burners enter the kiln, the external air butterfly valve is fully opened, the internal air butterfly valve is less opened, and the central air valve is also opened to make the flame longer, the burning belt moves backward, and the ring temperature is increased. If flat block materials are found, it is proved that the rear ring has fallen, and all burners are returned to the kiln mouth position, the external air butterfly valve is turned down, and the internal air butterfly valve is turned on, The central air butterfly valve should also be turned down to shorten the flame, increase the kiln speed, control the clinker granulation temperature, and protect the shell with the kiln. Because there are many factors of ring formation, it is not difficult to deal with them as long as the method is reasonable and specific analysis should be carried out according to the kiln type and ring formation structure.