Solutions to Low Nox gas burner failure

1. Maintenance When Low Nitrogen Oxide Gas Burner fails to ignite, gas is introduced and the gas ignites and burns. The combustion action is required to occur before the gas is introduced, and the combustion temperature field is formed first to facilitate ignition and combustion. If it fails to ignite, the flame detector cannot sense the flame signal, and the burner enters the maintenance state. The time from combustion to entering the maintenance state should be appropriate, neither too short nor too long. If it is too short, it will not be able to form a stable flame; if it is too long, a large amount of gas will enter the furnace when it fails to ignite. Generally, it is required that the burner judges the flame signal sensed by the flame detector within 2-3 seconds of the introduction of gas. If it does not ignite, it will enter the maintenance state, and if it ignites, it will continue to burn.
2. Flame-out maintenance During the combustion process of low nox gas burner, if the flame is accidentally extinguished, the burner will enter the maintenance state. Because the furnace is hot, gas entry is prone to explosion, so it is necessary to enter the maintenance state in a very short time to cut off the gas supply. From the occurrence of flameout to the burner entering the maintenance state, the response time of this process is required to be no more than 1 second.
3. Gas pressure limit protection Gas burner has a certain range for stable combustion, and the gas pressure is only allowed to fluctuate within a certain range. The purpose of limiting the gas pressure is to ensure flame stability: no flameout, no flameout, and no backfire, while limiting the output thermal power of the burner to ensure safe and economical operation of the equipment. When the gas pressure exceeds this range, the burner should be locked. The burner design generally uses a gas pressure switch to sense the pressure signal and output a switch signal to control the corresponding operation of the burner.
4. Air pressure lack protection The gas burner design has a high thermal intensity, and its combustion method uses forced blast. If the fan fails to cause air interruption or air shortage, the gas should be cut off immediately, otherwise the furnace will explode or backfire to the fan.www.burners-china.com