Burnout in gas-fired boilers is related to many factors. For example, the boiler flue temperature may be too high, reaching the upper limit of the allowable range. This increases radiative heat transfer from the high-temperature flue gas in the furnace to the burner, leading to increased temperature on the burner nozzle wall and subsequent burnout.
It may also be related to flame center misalignment in the boiler furnace. Inspections have revealed significant uneven temperature distribution in the furnace and at the burner nozzles, as well as uneven nozzle velocities at the four corners of the boiler. Furthermore, malfunctions in the burner's specifications, preventing stable tangential combustion, are another major cause of flame center misalignment.
During adjustments to the gas-fired boiler, if the secondary air velocity is too low, the gas ignition distance will be too short, causing the burner nozzle to overheat, deform, and eventually break. Additionally, if adjustments are not made promptly during high/low load changes, insufficient cooling of the upper secondary air damper nozzles can also lead to burnout.
Damage to the burner has a significant impact on the entire gas-fired boiler. Therefore, users must strengthen boiler control and adjustments during normal operation. This includes timely monitoring of gas pressure and quality changes to ensure a proper gas-to-hot-air ratio; observing the gas ignition process and adjusting the secondary air damper accordingly, switching from layer-by-layer to angle-by-angle operation if necessary; and adjusting the negative pressure combustion within the furnace and the gas-to-hot-air ratio during high-load and low-load changes to ensure the furnace flame remains straight and the gas opening at each layer is coordinated.
Additionally, the burner material in the gas-fired boiler can be improved. It is recommended to choose high-quality alloy steel with added wear-resistant and heat-resistant properties. High-temperature resistant stainless steel should be used for the swirl blades to prevent burner nozzle deformation and damage caused by the blades burning and falling off. Furthermore, it is essential to strictly adhere to the specifications of the gas-fired boiler burner according to the drawings to ensure tangential combustion of the flame within the furnace and guarantee stable operation of the gas-fired boiler.
Burnout in gas-fired boilers is related to many factors. For example, the boiler flue temperature may be too high, reaching the upper limit of the allowable range. This increases radiative heat transfer from the high-temperature flue gas in the furnace to the burner, leading to increased temperature on the burner nozzle wall and subsequent burnout.
It may also be related to flame center misalignment in the boiler furnace. Inspections have revealed significant uneven temperature distribution in the furnace and at the burner nozzles, as well as uneven nozzle velocities at the four corners of the boiler. Furthermore, malfunctions in the burner's specifications, preventing stable tangential combustion, are another major cause of flame center misalignment.
During adjustments to the gas-fired boiler, if the secondary air velocity is too low, the gas ignition distance will be too short, causing the burner nozzle to overheat, deform, and eventually break. Additionally, if adjustments are not made promptly during high/low load changes, insufficient cooling of the upper secondary air damper nozzles can also lead to burnout.
Damage to the burner has a significant impact on the entire gas-fired boiler. Therefore, users must strengthen boiler control and adjustments during normal operation. This includes timely monitoring of gas pressure and quality changes to ensure a proper gas-to-hot-air ratio; observing the gas ignition process and adjusting the secondary air damper accordingly, switching from layer-by-layer to angle-by-angle operation if necessary; and adjusting the negative pressure combustion within the furnace and the gas-to-hot-air ratio during high-load and low-load changes to ensure the furnace flame remains straight and the gas opening at each layer is coordinated.
Additionally, the burner material in the gas-fired boiler can be improved. It is recommended to choose high-quality alloy steel with added wear-resistant and heat-resistant properties. High-temperature resistant stainless steel should be used for the swirl blades to prevent burner nozzle deformation and damage caused by the blades burning and falling off. Furthermore, it is essential to strictly adhere to the specifications of the gas-fired boiler burner according to the drawings to ensure tangential combustion of the flame within the furnace and guarantee stable operation of the gas-fired boiler.