Condensing gas boiler is full use of the gas-fired boiler flue gas waste heat boilers, condensing boilers can improve combustion efficiency, and therefore to be welcomed. But the blind pursuit of flue gas waste heat utilization, the gas boiler inflicted closed mode, condensing boilers can also cause ignition phenomenon. http://www.waterfiretubeboiler.com/Gas-fired-boiler.html

1. Condensing gas boiler ignition cause analysis
Condensing gas boiler is full use of the gas-fired boiler flue gas waste heat boilers, condensing
boilers can improve combustion efficiency, and therefore to be welcomed. But the blind pursuit of
flue gas waste heat utilization, the gas boiler inflicted closed mode, condensing boilers can also
cause ignition phenomenon. General condensing gas boiler ignition the following reasons:
A : condensing gas boiler combustion is incomplete
Due to the heavy gas boiler fuel component caused incomplete combustion of fuel, so relying on
the hot surface GAH accumulate combustibles.
Crushing capacity condensing gas boiler residue other than purchase, C4 raffinate cracked residue
and fuel for many, their components heavier, high viscosity, low ignition point, easy analysis of
carbon, steam atomization of fuel combustion at very poor, high levels of macromolecules
droplets, oil gun nozzle easy to plug, so often affects the quality of atomization and combustion of
fuel. If the combustion adjustment run properly, insufficient air flow or unreasonable fluctuations
with the wind and process conditions, it will too late to make the black burn completely and
produce black smoke. The gas boiler lagging not completely burning oil particles are brought to
the boiler flue gas heat exchanger surface of the tail GAH start deposition, which also provides the
material basis for the secondary combustion n from the recent parking meter personnel flame
monitor the inspection results, and have found no problems. Experience analysts believe the
accident basically produce a lot of smoke when fuel combustion is bad, black smoke obscured the
monitor to enter or probe, produce false signals caused alarm parking.
In addition, frequent start and stop the process of condensing boilers, furnaces lag due to poor
combustion conditions, the fuel is not easy to burn at lower flue gas velocity, can easily cause a lot
of unburned fuel deposition; boiler over low load running time long, combustion instability,
smoke speed is low, unburned combustibles easily deposited in the corrugated board; past lessons
and experiences also confirmed the accident: air preheater rotor ash fouling, worn leakage, excess
air ratio rear flue or low oxygen content control such as fuel due to lack of oxygen can lead to
incomplete combustion. Currently, the company A, B furnace air preheater rotor has a different

2. degree of leakage risks; 1997 after gas boiler still can not run at full capacity due to various
reasons, flue gas flow rate is low; sometimes improve the thermal efficiency of condensing boilers
and blindly to reduce the tail of excess air. These are secondary combustion air preheater leaving a
hidden danger.
B : condensing gas boiler ignition frequent purging
Frequent purging gas condensing boilers for ignition of combustible materials deposition
provides ample resurgence ignition conditions.
Boiler flue gas flow rate is low ignition process, the oxygen content of the combustion system
space is much higher than the normal operation again, like B had successive ignition furnace was
purged, so they make still with heat due to unburned combustibles have plenty of excess oxygen
and resurgence.Condensing gas boiler is full use of the gas-fired boiler flue gas waste heat boilers,
condensing boilers can improve combustion efficiency, and therefore to be welcomed. But the
blind pursuit of flue gas waste heat utilization, the gas boiler inflicted closed mode, condensing
boilers can also cause ignition phenomenon. General condensing gas boiler ignition the following
reasons:
A condensing gas boiler combustion is incomplete
Due to the heavy gas boiler fuel component caused incomplete combustion of fuel, so relying on
the hot surface GAH accumulate combustibles.
Crushing capacity condensing gas boiler boiler residue other than purchase, C4 raffinate cracked
residue and fuel for many, their components heavier, high viscosity, low ignition point, easy
analysis of carbon, steam atomization of fuel combustion at very poor, high levels of
macromolecules droplets, oil gun nozzle easy to plug, so often affects the quality of atomization
and combustion of fuel. If the combustion adjustment run properly, insufficient air flow or
unreasonable fluctuations with the wind and process conditions, it will too late to make the black
burn completely and produce black smoke. The gas boiler lagging not completely burning oil
particles are brought to the boiler flue gas heat exchanger surface of the tail GAH start deposition,
which also provides the material basis for the secondary combustion n from the recent parking
meter personnel flame monitor the inspection results, and have found no problems. Experience
analysts believe the accident basically produce a lot of smoke when fuel combustion is bad, black
smoke obscured the monitor to enter or probe, produce false signals caused alarm parking.

3. In addition, frequent start and stop the process of condensing boilers, furnaces lag due to poor
combustion conditions, the fuel is not easy to burn at lower flue gas velocity, can easily cause a lot
of unburned fuel deposition; boiler over low load running time long, combustion instability,
smoke speed is low, unburned combustibles easily deposited in the corrugated board; past lessons
and experiences also confirmed the accident: air preheater rotor ash fouling, worn leakage, excess
air ratio rear flue or low oxygen content control such as fuel due to lack of oxygen can lead to
incomplete combustion. Currently, the company A, B furnace air preheater rotor has a different
degree of leakage risks; 1997 after gas boiler still can not run at full capacity due to various
reasons, flue gas flow rate is low; sometimes improve the thermal efficiency of condensing boilers
and blindly to reduce the tail of excess air. These are secondary combustion air preheater leaving a
hidden danger.
2, condensing gas boiler ignition frequent purging
Frequent purging gas condensing boilers for ignition of combustible materials deposition provides
ample resurgence ignition conditions.
Boiler flue gas flow rate is low ignition process, the oxygen content of the combustion system
space is much higher than the normal operation again, like B had successive ignition furnace was
purged, so they make still with heat due to unburned combustibles have plenty of excess oxygen
and resurgence.
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