Reason for occurrence:
1. Unreasonable arrangement of burner position
2. Uneven operation of burner;
3. The position and size of the smoke exhaust outlet are unreasonable, and the smoke exhaust is uneven;
4. The temperature near the furnace entrance is low.
The exclusion methods include:
1. Change the position or injection angle of the burner;
2. Adjust the burner to balance the heat inside the furnace;
3. Change the position or size of the exhaust outlet;
4. Increase the energy of one or two burners near the furnace entrance by about 20% compared to other burners.