Generally, the problem of oil burning boiler such as Oil Fired Hot Air Boiler-- blockage of flue is caused by three reasons:

1. The fuel oil boilers of rotary burners are of inferior quality and have low requirements on oil filtration. Some mechanical impurities in the fuel, as well as ash such as sodium vanadium, cannot be burned.

2. Some of the boilers on board are not working well, so they often give an alarm when ignition occurs. The boilers on board will simply adopt the practice of continuous furnaces, with small fires burning slowly. However, when the boiler is running under low load, the flow rate of flue gas is low, the self-cleaning ability of the boiler is poor, and the soot is easy to deposit in the flue. At the same time, when the boiler load is low, the exhaust temperature is relatively low, especially when the acid dew point is reached, the soot is sticky and easy to deposit.

3. Poor fuel atomization, excessive oil drop diameter, inappropriate air oil ratio, etc., lead to insufficient combustion of the boiler and the unburned fuel is discharged along with the flue gas and remains in the flue.

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