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SPCL36104-S Suction System
3.5
PNEUMATIC RECLAIM SYSTEM
The Reclaim System consists of a pickup tube at the bottom of the Blast Cabinet cone, a
media recovery duct, and a Reclaimer Assembly. The Blast Cabinet ventilation air is used to
pneumatically convey spent media to the Reclaimer. Good media is centrifugally separated
from dust and broken down media (fines). Good media falls to the Storage Hopper while dust
and fines are conveyed to the Dust Collector. The Reclaimer has a secondary air metering
band and exterior wear plate. Optional wear resistant linings are available for the Reclaimer.
3.5.1 Secondary Air Metering Band (See Figure 4)
The metering band allows secondary air to enter the Reclaimer. The more secondary
air induced, the larger the particles removed from the system and sent to the Dust
Collector. If good media is carried to the Dust Collector, close the metering band. If
too much dust is being recycled along with the good blast media, open the metering
band. Changes should be made in 1/16” increments until the final setting is
determined. A system must normally be operated for (8) hours to “season” the filters
before it reaches equilibrium and the tuning band setting may be finalized. See the
appropriate section in Chapter 9.
3.6
DUST COLLECTION COMPONENTS
The Dust Collection System components consist of the Dust Collector with filters, the filter
cleaning controls, and the Blower. Dust and fines are drawn from the Reclaimer to the Dust
Collector. Clean air is discharged from the Blower. One of two types of Dust Collector may
be supplied and are described below. With any Dust Collector, filters require a coating of
dust to achieve maximum filter efficiency. The system may require several hours of operation
before filters are fully coated (“seasoned”).
3.6.1 (N/A) Bag Type Dust Collector
The Dust Collector must be shut down periodically to allow bags to be cleaned.
Tubular bags are mounted with the sealed end up and hooked onto a hanger rod on the
dust bag rack. The open end of the bag has a ring which seals into holes in the bag
plate in the hopper of the Dust Collector.
3.6.2 Filter Cleaning
Filter bags are suspended from the bag rack at the top of the Dust Collector housing.
The bag rack is lifted and lowered by a cylinder at a moderate rate, flexing the bags
and dislodging dust and fines. Filters should be cleaned every two (2) hours. This
may vary depending on dust loading. Manual cleaning is accomplished after the
Blower is shut down and the button on the side of the Dust Collector housing is
pressed and released.
3.6.3 (N/A) Optional Auto Bag Shake Control
The Auto Bag Shake Control Box, mounted on the Dust Collector, energizes and de-
energizes a solenoid valve to raise and lower the bag rack. A normally closed vacuum
switch enables the Bag Shake control only when the Blower is shut down. Auto Bag
Shake controls may be located in the Main Electrical Enclosure and not use a pressure
