【Weekly Topic】How can we avoid the oil gun retracting on its own? (6.20~6.26)
Thread Content
This post was last edited by zgj2405 on 2011-6-21 at 15:10. During the startup process of coal powder boilers, when oil and coal are burned together, it is common for the flame detection system to fail to detect the flame, which causes the oil injector to retract and affects combustion safety. I’m not sure how to avoid this situation
1. At the beginning of ignition, diagonal combustion should be carried out first; once the combustion effect improves, the other two corners should be brought into use, while ensuring good atomization of the oil gun； 2. The coal powder concentration should not be too high at the beginning of operation; it is necessary to check the furnace regularly right at the site once ignition occurs, and close monitoring of the negative pressure in the furnace should be carried out. When combustion is poor, the negative pressure in the furnace fluctuates significantly ； 3. Accumulate sufficient experience: determine how much powder to add based on the flue gas temperature in each furnace ； 4. Adjust the intensity of the flame detector amplifier to improve the accuracy of detection.
At the beginning of ignition, the furnace temperature is too low, resulting in excessive heat absorption by the water wall, which affects the combustion conditions inside the furnace. It is necessary to increase the outlet temperature of the grinder, reduce the pressure of the primary air, and avoid using too large a coal feeding rate at this initial stage! Diagonal combustion can also be used; once the combustion effect improves, the other two corners can be added!
1. At the beginning of ignition, diagonal combustion should be carried out first; once the combustion effect improves, then the other two corners can be involved in the process. 2. If the flame detector of the oil gun fails to detect a flame, it is due to poor atomization of the oil by the gun, which results in incomplete combustion; the smoke from the oil prevents the flame detector from detecting the flame. Diagonal combustion is certainly possible; the main thing is to raise the furnace temperature and adjust the air supply accordingly. 3. The coal powder concentration should not be too high at the beginning of operation; it is necessary to check the furnace regularly right from the start of ignition, and pay close attention to the negative pressure in the furnace. When combustion is poor, the negative pressure in the furnace fluctuates significantly. 4. Burn the oil gun for a longer time to raise the furnace temperature, then add coal powder
This post was last edited by dongjiang1001 on 2011-6-27 at 15:15. 1. It is essential to ensure that the oil gun produces good atomization. 2. The coal powder concentration should not be too high at the start of operation; it is necessary to check the combustion situation frequently right at the site once ignition occurs, and close monitoring of the negative pressure in the furnace chamber is required. When combustion is poor, the negative pressure in the furnace chamber fluctuates significantly. 3. Accumulate sufficient experience: determine how much powder to add based on the flue gas temperature in each furnace