Analysis of the influence of air in the nozzle of a low nitrogen burner on ignition

Analysis of the influence of air in the nozzle of a low nitrogen burner on ignition
The burner of a low nitrogen burner is the most direct heating part. At the beginning of the ignition period, internal air pressure may cause ignition failure or insufficient ventilation. How to solve this problem?
Firstly, if the flow channel is closed, the incineration airflow will decrease, the pressure in front of the flame plate will respond and increase, the wind speed will increase, the turbulence will increase, and the airflow penetration ability will be improved, which is conducive to enhancing the mixing of air and good body., And achieve good flame retardant stability.
The burner nozzle is equipped with a regulator to regulate the air passage between the burner nozzle and the flame plate.
When the flame shakes, adjustments must be made. In practical applications, it is necessary to adjust the thermal load of the pressurized boiler (compressor and gas turbine units provide 0.2-0.4 MPa of incineration hot air) or higher.
From the above description, it can be seen that when the air duct of the burner nozzle is lowered, the position of the burner nozzle must ensure that the air pressure level in front of the flame plate is almost always higher than the air pressure level behind the flame plate.
Usually, it is recommended to reduce the air passage in the incinerator and open the door at the fan inlet to respond.
The incinerator must be equipped with a large output. In practical operation, the air duct in the incinerator must be placed in the middle position, and then the incinerator can be started for debugging.
When reaching high output, gradually close the air channel in the burner nozzle, close the air door at the fan inlet to the fully open position, and then move the flame diffuser of the burner nozzle forward and backward to adjust the airflow to make it suitable.
Attention: During the adjustment process, do not close all ventilation pipes in the incineration cover.
Ensure that the axis of the burner nozzle and flame plate is the same. If the shaft alignment is not good, the flame will not burn well, and the burner nozzle will burn due to local overheating. The alignment of the shaft can be checked through the inspection hole at the rear of the incinerator.
Then, tighten the screws on the adjustment handle, adjust the position of the incinerator, and secure the incinerator.
Attention: Check if the ignition is stable.
If the air passage inside the incinerator is closed too small, it may be difficult to ignite due to high wind speeds. If this situation occurs, the channel must be gradually opened until the ignition is successful.
At this point, the setting position of the incinerator nozzle is at this position. The small opening of the damping plate should meet the requirement of flexible operation of the air pressure switch in the ignition position to ensure stable ignition. Otherwise, please adjust the opening of the baffle again.
As a specialized equipment, low nitrogen burners should fully read the manufacturer's instructions. If the problem cannot be solved, the manufacturer's technical department should be consulted in a timely manner, and it should not be disassembled by oneself to avoid damage or danger.