Installation, Operation and Maintenance manual
19
PowerCore
®
Dust Collectors - Series CPC
Shut-down sequence
At the end of any period of operation it is most important that all residual
deposits are cleared from the PowerCore filter packs, casing, discharge hopper
and equipment being served. To achieve this, equipment should be shut down
in the following order:
1. Stop main fan only, leaving the controller and compressed air supply switched
on to allow the collector to be cleaned ‘off-line’.
To enable off-line cleaning, refer to controller manual.
2. After 10-15 minutes, switch off the controller and compressor but leave the
discharge equipment running to ensure that it is emptied.
3. After a further 5 minutes, switch off the discharge equipment if applicable.
Where the dust being handled has self-heating properties, it is important to
remove any deposits in the dust container to reduce the risk of an explosion.
Adherence to the above procedure will ensure that a PowerCore dust collector
installation is maintained at optimum efficiency.
On installations where the inlet duct is relatively short, this procedure may
result in a dust emission occurring at the inlet and therefore may not be an
appropriate procedure if the dust being handled is dangerous. Therefore a
Risk Assessment must be carried out to ensure the final procedure is safe.
OPERATION
Principle of operation
Filtering operation (fig. 9a)
Contaminated air from the dust generation source is drawn through the inlet into the
collector by the fan. Airflow is directed upwards through the PowerCore filter packs,
removing the fine particulate (heavier particulate falls into the discharge hopper). The
clean, filtered air passes through the collector and is discharged through the cleaned
air outlet.
Cleaning operation (fig. 9b)
At regular intervals, governed by the controller, each PowerCore filter pack receives
a short burst of compressed air from an adjacent diaphragm valve. This causes a
brief, powerful reversal of airflow through the filter pack, effectively dislodging the
dust layer which then falls into the discharge hopper.
