When contaminated air enters the baghouse from the bottom inlet, it flows through the filters. Depending on the cleaning system, dust accumulates on the outer or inner surface of the baghouse filter.
The dust collected on the filter is called "cake". As the cake thickens on the filter surface, the pressure drop across the filter increases.
When there is no longer air pressure to carry the contaminated air, the cleaning cycle begins. Periodic cleaning ensures that the pressure does not drop too much.
Depending on the type of baghouse filter, the cleaning cycle can be either continuous or intermittent. Periodic cleaning means that the system is shut down first. Continuous cleaning means that while one section is being cleaned, other sections continue to work.
The cleaning process causes the caked dust to fall from the baghouse filter onto a hopper and then onto an exhaust device, ready for appropriate treatment.
The now cleaned air is discharged through the clean air outlet and then flows into the atmosphere or back into the facility.
