•  Unstable Flue Gas

When black smoke is observed at the outlet of the dust collector, it may be caused by unstable flue gas. 

This situation usually arises when the flue gas contains excessive combustible substances, such as volatile organic compounds (VOCs), sulfur dioxide, nitrogen oxides, etc.

These substances mix with the flue gas, leading to unstable flue gas composition and thus the phenomenon of black smoke emission.

Solution: Install pre-treatment equipment before the dust collector to remove combustible substances from the flue gas and stabilize its composition.

• Excessively Low Temperature at Dust Collector Outlet

• In winter with low ambient temperatures, the dust collector may emit white smoke.

This is because the water vapor in the flue gas fails to evaporate sufficiently and remains in the gas, resulting in flue gas condensation.

Solution: Install heating equipment before the dust collector to heat the flue gas, enabling full evaporation of water vapor and thus preventing flue gas condensation.

•  Damaged Filter Cartridges

Infrequent cleaning or replacement of filter cartridges, as well as excessively low air flow, can cause the dust collector to operate abnormally and result in smoking.

Solution: Perform regular maintenance and cleaning of the dust collector, and replace the filter cartridges timely.

• Fan Malfunction

The fan is a critical component of the dust collector. Malfunctions of the fan will reduce the waste gas treatment efficiency of the dust collector, 

or even render it inoperable, which will inevitably lead to smoking from the chimney.

Solution: Maintain the fan properly, conduct regular maintenance and inspection, and replace damaged components in a timely manner.