The reasons for the blackening of the furnace bottom during use of low nitrogen burners

The reasons for the blackening of the furnace bottom during use of low nitrogen burners
What is the reason why the low nitrogen burner is fixed to the boiler through flanges and insulation sealing rings, and the furnace bottom turns black during use? The following are the reasons compiled by the editor:
If the low nitrogen burner is used for too long, it will cause the flame to burn red and the furnace bottom will often appear black. The reason for discovering this situation is that oil and dust have fallen into the small holes of the incinerator. At this point, the incinerator can be dismantled. Use an old toothbrush to brush around the small holes in the incinerator, then use fine lead wire to poke one by one, and then tap a few times on the table to remove debris.
If the flame of the low nitrogen burner remains red after cleaning, it indicates that the nozzle is contaminated with dirt. Remove the incinerator, expose the nozzle, and poke it a few times with hard plastic wire or brown hair. Do not use metal wires such as copper or iron to prevent the nozzle's pores from becoming rough and affecting its application effect. Then install a low nitrogen burner, and the flame will be blue, indicating that the problem has been resolved and is working properly.
The low nitrogen burner is very convenient to use. It uses a servo motor to adjust the first and second airflow. When the burner stops running, the air door closes to reduce heat loss in the furnace.

——Author：EBICO