What is the purpose of purging a natural gas burner before ignition?
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Is the natural gas burner purged with air for a few minutes before ignition? Which area is to be purged, what gas is used for purging, and what is the purpose of purging? Do I still need to purge for a few minutes after the ceasefire before turning off the fan? Which has higher pressure, natural gas or air, during ignition?
The purpose of purging a natural gas burner before ignition is to remove impurities and residual fuel from the burner, thereby preventing incomplete combustion and the generation of harmful gases. The areas that are purged generally refer to the combustion chamber, nozzles, and pipes inside the burner. The purge gas is generally atmospheric air. After the ceasefire, it is also necessary to purge for a period of time to maintain safety. Normally, the pressure difference between natural gas and air is not significant, but at the moment of ignition, the pressure of the gas increases rapidly, resulting in the gas pressure being higher than that of air. .
Is purging done to prevent explosions?