There are three elements of combustion: fuel, ignition source, and combustion-supporting oxygen.
Excess air coefficient: the ratio of the actual air volume for combustion to the theoretical air volume for fuel.
NOx: The collective name for NO and NO2 nitrogen oxides produced during combustion.
Natural induced draft diffusion combustion: The air required for combustion does not rely on fans or other forced air supply methods to supply oxygen, but relies on natural ventilation or the pressure of the fuel itself to induce air to obtain combustion-supporting oxygen.
Forced air combustion: A combustion method in which a fan or compressor provides forced air supply to provide combustion-supporting oxygen. Most of the general industrial burners are of this type.
Premixed combustion (injection type): fuel and air are premixed in proportion before being ejected and burned, and then ejected and burned.
FSG: FLAME SAFEGUARD SYSTEM combustion safety protection device. FSG generally consists of the following parts:
Power supply: for supplying system operation and relay closing.
Flame detection part: detect and judge the status of the flame at any time.
Ignition output: supplies power to the ignition transformer to generate the spark required for ignition, and automatically shuts down after confirming normal ignition to protect the ignition transformer.
Valve control output: Open the fuel solenoid valve for ignition and combustion during ignition output or after a slight delay.
Alarm output: When ignition fails or flameout occurs during normal combustion, the fuel valve can be cut off in time and an alarm signal is output.
Others: Different FSGs are equipped with many different ancillary devices according to needs, such as: burner fan pressure switch input, temperature control input, fuel pressure switch input, etc.
Ion flame detection: Using the principle of one-way ionization of high-temperature smoke, an AC voltage is added to the flame, and the flame state is confirmed by detecting the presence or absence of current.
Photoelectric flame detection: The light of the flame burning itself is used to detect the flame status through the photoelectric sensor.
Purge before ignition: Burners are generally equipped with automatic control ignition devices. In order to ensure the safety of initial ignition, fresh air can be sent into the furnace through a combustion fan to dilute and remove flammable gases in the furnace before formal ignition. The purging time is related to the size of the furnace and the combustion volume of the burner. Generally, the purging time is required to satisfy the furnace ventilation 4 times.
(Purge after shutting down the furnace: During normal combustion, the flame temperature at the burner nozzle can reach more than 1,000 degrees. Since the high-temperature flue gas is continuously taken away by the circulating fan, the burner and combustion chamber can be kept below a certain temperature. .If the burner and circulation fan are suddenly turned off when the furnace is shut down, the temperature of the burner and combustion chamber will rise sharply because it cannot be cooled, causing damage to the burner and combustion chamber. In addition, after the burner fan stops, the high temperature in the furnace will Radiation can also damage other parts of the burner. Therefore, for some heating devices with high furnace temperatures, it is best to use burners with a purge function after the furnace is shut down. That is, the burner fan and circulation fan continue to run for a period of time when the furnace is shut down. Wait until the temperature of the combustion chamber drops appropriately before stopping the operation of the gas blower. In addition, for some large and medium-sized gas burners, in order to ensure that the residual exhaust gas that may accumulate in the furnace is removed during shutdown, a burner with a post-purge function should generally be selected)
There are three elements of combustion: fuel, ignition source, and combustion-supporting oxygen.
Excess air coefficient: the ratio of the actual air volume for combustion to the theoretical air volume for fuel.
NOx: The collective name for NO and NO2 nitrogen oxides produced during combustion.
Natural induced draft diffusion combustion: The air required for combustion does not rely on fans or other forced air supply methods to supply oxygen, but relies on natural ventilation or the pressure of the fuel itself to induce air to obtain combustion-supporting oxygen.
Forced air combustion: A combustion method in which a fan or compressor provides forced air supply to provide combustion-supporting oxygen. Most of the general industrial burners are of this type.
Premixed combustion (injection type): fuel and air are premixed in proportion before being ejected and burned, and then ejected and burned.
FSG: FLAME SAFEGUARD SYSTEM combustion safety protection device. FSG generally consists of the following parts:
Power supply: for supplying system operation and relay closing.
Flame detection part: detect and judge the status of the flame at any time.
Ignition output: supplies power to the ignition transformer to generate the spark required for ignition, and automatically shuts down after confirming normal ignition to protect the ignition transformer.
Valve control output: Open the fuel solenoid valve for ignition and combustion during ignition output or after a slight delay.
Alarm output: When ignition fails or flameout occurs during normal combustion, the fuel valve can be cut off in time and an alarm signal is output.
Others: Different FSGs are equipped with many different ancillary devices according to needs, such as: burner fan pressure switch input, temperature control input, fuel pressure switch input, etc.
Ion flame detection: Using the principle of one-way ionization of high-temperature smoke, an AC voltage is added to the flame, and the flame state is confirmed by detecting the presence or absence of current.
Photoelectric flame detection: The light of the flame burning itself is used to detect the flame status through the photoelectric sensor.
Purge before ignition: Burners are generally equipped with automatic control ignition devices. In order to ensure the safety of initial ignition, fresh air can be sent into the furnace through a combustion fan to dilute and remove flammable gases in the furnace before formal ignition. The purging time is related to the size of the furnace and the combustion volume of the burner. Generally, the purging time is required to satisfy the furnace ventilation 4 times.
(Purge after shutting down the furnace: During normal combustion, the flame temperature at the burner nozzle can reach more than 1,000 degrees. Since the high-temperature flue gas is continuously taken away by the circulating fan, the burner and combustion chamber can be kept below a certain temperature. .If the burner and circulation fan are suddenly turned off when the furnace is shut down, the temperature of the burner and combustion chamber will rise sharply because it cannot be cooled, causing damage to the burner and combustion chamber. In addition, after the burner fan stops, the high temperature in the furnace will Radiation can also damage other parts of the burner. Therefore, for some heating devices with high furnace temperatures, it is best to use burners with a purge function after the furnace is shut down. That is, the burner fan and circulation fan continue to run for a period of time when the furnace is shut down. Wait until the temperature of the combustion chamber drops appropriately before stopping the operation of the gas blower. In addition, for some large and medium-sized gas burners, in order to ensure that the residual exhaust gas that may accumulate in the furnace is removed during shutdown, a burner with a post-purge function should generally be selected)