How to deal with the tempering and de-firing phenomenon of gas boilers?
2022-03-14 15:01:44
Under normal operating conditions, the fuel flame of the gas boiler is persistent and stable. However, if some emergencies occur, it will easily cause the phenomenon of "tempering" and "fire-off", which will seriously affect the safety of gas boilers.
When the gas boiler is tempered and de-fired, the negative pressure of the furnace will be high and low, which is quite unstable; observe that the indicators of CO2 and O2 in the test flue gas change significantly; the color of the flame is also changing all the time. .
As a professional gas-fired boiler manufacturer, Henan Fangkuai Boiler will tell you about the causes and treatment measures of gas-fired boilers that appear to be tempered and de-fired, so as to help the gas-fired boilers you use stay away from danger.
1. Reasons for tempering and de-firing in gas boilers
1. The concentration of the gas fuel in the gas boiler is within the limit of combustion compared to the air. If the flow rate of the combustible gas in the burner is lower than the combustion speed, the flame will spread in the direction of the fuel source, and the so-called "return" occurs. fire phenomenon". According to the research of gas-fired steam boiler manufacturers, the higher the furnace temperature of the gas-fired boiler, the faster the flame will spread, and the easier it will be to produce backfire. Since the flashback phenomenon occurs in the burner, the damage to the burner is relatively large, and in severe cases, an explosion occurs in the burner.
2. Compared with the tempering phenomenon, the condition for the de-firing phenomenon is that the flow rate of the combustible gas at the burner outlet is higher than the combustion speed, causing the fuel to start to burn in the direction of the original burner. This phenomenon is called "de-firing". Phenomenon". The study found that when the gas boiler is in a low load state, the boiler is more prone to fire off.
2. Treatment measures for gas-fired boilers after tempering and fire-off
1. Through the test, if it is caused by the low gas pressure, it is necessary to conduct a thorough inspection of the gas pipeline of the gas boiler. If the gas pressure is too high, it is necessary to strictly check the normal operation of the regulating valve on the entire gas pipeline, the total air pressure on the air duct and the air pressure in front of the burner, and the opening of the air valve of the burner.
2. If it is caused by the reduction of the total gas supply pipeline pressure in the gas boiler room, it is necessary to contact the gas supply station in time to quickly increase the gas supply pressure to solve the problem. If it passes the inspection and the intake pressure is normal, it is necessary to check whether the pressure regulating valve is normal.
After passing the inspection of the above aspects, if there is no problem, it is necessary to check the leakage of the gas pipeline to kill all dangerous situations in the cradle
When the gas boiler is tempered and de-fired, the negative pressure of the furnace will be high and low, which is quite unstable; observe that the indicators of CO2 and O2 in the test flue gas change significantly; the color of the flame is also changing all the time. .
As a professional gas-fired boiler manufacturer, Henan Fangkuai Boiler will tell you about the causes and treatment measures of gas-fired boilers that appear to be tempered and de-fired, so as to help the gas-fired boilers you use stay away from danger.
1. Reasons for tempering and de-firing in gas boilers
1. The concentration of the gas fuel in the gas boiler is within the limit of combustion compared to the air. If the flow rate of the combustible gas in the burner is lower than the combustion speed, the flame will spread in the direction of the fuel source, and the so-called "return" occurs. fire phenomenon". According to the research of gas-fired steam boiler manufacturers, the higher the furnace temperature of the gas-fired boiler, the faster the flame will spread, and the easier it will be to produce backfire. Since the flashback phenomenon occurs in the burner, the damage to the burner is relatively large, and in severe cases, an explosion occurs in the burner.
2. Compared with the tempering phenomenon, the condition for the de-firing phenomenon is that the flow rate of the combustible gas at the burner outlet is higher than the combustion speed, causing the fuel to start to burn in the direction of the original burner. This phenomenon is called "de-firing". Phenomenon". The study found that when the gas boiler is in a low load state, the boiler is more prone to fire off.
2. Treatment measures for gas-fired boilers after tempering and fire-off
1. Through the test, if it is caused by the low gas pressure, it is necessary to conduct a thorough inspection of the gas pipeline of the gas boiler. If the gas pressure is too high, it is necessary to strictly check the normal operation of the regulating valve on the entire gas pipeline, the total air pressure on the air duct and the air pressure in front of the burner, and the opening of the air valve of the burner.
2. If it is caused by the reduction of the total gas supply pipeline pressure in the gas boiler room, it is necessary to contact the gas supply station in time to quickly increase the gas supply pressure to solve the problem. If it passes the inspection and the intake pressure is normal, it is necessary to check whether the pressure regulating valve is normal.
After passing the inspection of the above aspects, if there is no problem, it is necessary to check the leakage of the gas pipeline to kill all dangerous situations in the cradle
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