The choice of a correct dust suction system is very important in the blasting process since its function is to produce an air flow for the recirculation of the abrasive and cleaning of particles that contaminate it, and also to cause an air pressure inside the blasting cabin lower than atmospheric pressure to avoid dust leakage to adjacent areas.

Both improper system operation and a low suction power installation seriously affect the wear of the blasting machine, the effectiveness of the treatment and the consumption of shot blast media.

Nowadays, most of the dust aspirators used in shot blasting equipment use paper or polyester cartridge filters as filter element, achieving excellent results in the retention of fine dust particles.

The different qualities of filtering element used in the cartridges will determine the minimum particle size that can be retained and better cleaning possibilities to avoid a quick saturation of the particles.

Cym Materiales manufactures eleven models of dust collectors with suction volumes and air filtration from 12 m3/min to 432 m3/min.

The dust filters have the following technical characteristics:

• Higher efficiency in particle filtration with retentions of 0.5 microns in 99.9% efficiency, superior to traditional bag filters, in micron and submicron particles. In this way, the strictest particle emission standards are achieved.
• Easy filter replacement through front doors with quick access from the outside. This eliminates the need to enter the equipment or to provide large spaces above the equipment and complicated maintenance structures.
• Compact design thanks to the arrangement of the filter media in the cartridge, which ensures a large filtering surface in a small volume. One cartridge replaces several traditional bags of much larger dimensions, allowing the dust collector to be accommodated indoors and saving a lot of floor space.
• Pneumatic filter element cleaning system, which allows continuous operation and long service life of the filter elements. Continuous filter cleaning allows 24-hour operation.
• All dust filters can be configured according to the needs of the user or the installation, highlighting the following options o Rotary valves for dust discharge.
  • Optional intermediate cyclones for dust retention to be placed before the cartridge filter.
  • Different qualities of filtering elements for different applications (80% cellulose/20% polyester, 100% polypropylene, 100% polypropylene).
  • Acoustic soundproofing Maintenance platforms
  • Fire prevention and protection system fire extinguisher
    • Inert material additive (CaCO3 or similar)
    • Fire suppression system Co2 or Water

Operation

During normal operation, contaminated air enters the equipment from the top and passes through the filter cartridges.

Dust is collected on the outside of the cartridges and the now clean air continues through the center of the cartridge to the outside of the vacuum cleaner. During a cartridge cleaning cycle, a cleaning controller sequentially activates the corresponding diaphragm valve. A pulse of high-pressure compressed air is then directed into the center of the cartridge, blowing the dust accumulated on the outer surface of the cartridge in reverse flow. The particles are directed into the collection hopper, driven by the action of gravity and aided by the downward flow of air.

DUST COLLECTOR MODELS

Cym manufactures dust collectors for fixed or mobile installations according to the needs of the user or the installation.

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