Some reasons for the backfire phenomenon in gas infrared metal fiber burners.

The backfire of metal fiber gas infrared burners refers to the phenomenon where the flame burns inside the burner rather than on the surface of the burner, which not only affects combustion efficiency but may also damage equipment and cause safety issues. The following are some common causes of tempering:

1. Gas related reasons

1) The gas pressure is too low. Insufficient gas supply pressure will cause a decrease in gas flow rate. When the gas flow rate is lower than the flame propagation speed, the flame will propagate into the burner, leading to backfire. This may be caused by gas pipeline blockage, pressure regulating valve failure, or problems with the gas supply system.

2) The composition of the gas has changed. Gas with different compositions has different combustion characteristics and flame propagation speeds. If the composition of the gas changes, such as mixing with other gases, it may cause the flame to spread faster than the flow rate of the gas, leading to backfire.

2. Air related reasons

1) Excessive air. If too much air enters the burner, it will reduce the flow rate of the mixed gas and also change the combustion characteristics of the mixed gas, accelerating the flame propagation speed and increasing the risk of backfire. This may be caused by improper adjustment of the air door or ventilation system malfunction.

2) The preheating temperature of the air is too high. High temperature air will accelerate the combustion rate of mixed gases and correspondingly increase the flame propagation speed. When the preheating temperature of the air is too high, it is easy to cause backfire phenomenon.

3. Problems with the burner itself

1) Damage to metal fiber mesh: The metal fiber mesh is a critical component of the burner. If it is damaged, blocked, or aged, it can affect the uniformity of gas and air mixing and outflow velocity, resulting in a low local mixed gas flow rate and triggering backfire.

2) Unreasonable burner design: If the structural design of the burner is unreasonable, such as inappropriate parameters such as nozzle size, mixing chamber shape and size, it may lead to uneven mixing of gas and air, or unreasonable flow velocity distribution of the mixed gas, thereby increasing the possibility of backfire.

4. The influence of external environmental factors

The wind speed is too high. When the wind speed around the burner is too high, it will affect the stability of the flame, making it easy for the flame to be blown into the inside of the burner, resulting in backfire. Especially for outdoor burners, they are more susceptible to the influence of wind speed.

As a professional metal fiber textiles manufacturer and wholesaler,RONDETEX offers multiple varieties of FeCrAl metal fiber fabric, which can be used for the replacement, maintenance, and mass production of gas infrared metal fiber burners. We provide sample orders for initial testing. Please feel free to contact us for cooperation.