Why does liquefied gas not backfire during combustion?
Why does liquefied gas not backfire during combustion?
If experienced low nitrogen burner companies understand a problem, liquefied gas will not backfire during combustion. So why is this? Let’s learn about it together below.
The main components of liquefied gas are propane and butane.
The combustion methods of liquefied gas are divided into diffusion combustion, flameless combustion, and atmospheric combustion.
The abnormal states of liquefied gas combustion include:
Flame release: When the combustion intensity continues to increase. The nodding ring gradually narrows, and then disappears. The flame escapes from the burner outlet and burns at a certain distance, which is called flame separation.
De ignition: When the airflow velocity continues to increase, the flame will be blown out, which is called de ignition.
Tempering: Conversely, when the gas flow rate entering the burner continuously decreases, that is, the airflow velocity decreases, the blue cone becomes lower and lower. Later, due to the airflow velocity being lower than the flame propagation velocity, the flame will retract into the burner, which is called tempering.
De ignition and tempering phenomena are not allowed, as they can cause incomplete combustion and produce toxic gases such as carbon monoxide. For the furnace, quenching and tempering can cause the formation of explosive gases after extinguishing, which can easily lead to accidents.
If the temperament changes within the range of the stove design, the stove can adjust the combustion effect by adjusting the air damper to avoid unstable combustion.
So, it can be concluded that insufficient gas flow during liquefied gas combustion can cause backfire.