AIR POLLUTION CONTROL

RECIRCULATINGB E N E F I T S O F

D U S T C O L L E C T I O N S Y S T E M S

Whether your facility uses dust collectors to ensure good indoor air quality (IAQ) for workers, keep equipment clean and/or

recover high-value process dusts, you might want to consider recirculating the air back into

the plant downstream of the collector(s).

THERE ARE AT LEAST THREE PRIMARY BENEFITS TO USING A RECIRCULATING DUST COLLECTION SYSTEM.

1) Less Regulatory Paperwork 2) Substantial Energy Savings 3) Being A Good Neighbor

Farr Gold Series on Aluminum Blasting

LESS REGULATORY PAPERWORK

If contaminated air is exhausted outdoors, the exhausted air must be compliant with EPA standards, that includes time-consuming permit applications, testing, and regulatory paperwork.

However, if the air is contained in the facility, it can fall into the OSHA compliance standards instead. OSHA air quality standards have become increasingly stringent, but is still perceived by some as a less daunting prospect.

SUBSTANTIAL ENERGY SAVINGS

If the contained air in the factory is climate-controlled, then air recirculation is hands down the single best way to save energy and maximize return on investment with a dust collector.

The circulated air can help facilitate heating or cooling conditions in your plant. Facilities in all regions report five- to six-figure annual energy savings, with the greatest savings seen in northern climates which experience longer, colder winters.

In addition, the U.S. Department of Energy offers public utility-sponsored rebates and incentives for facilities that save energy by recirculating heated or cooled air.

BEING A GOOD NEIGHBOR

Outdoor systems and exhaust stacks can spark community concern and potential complaints. An indoor dust collection system is not subject to unneeded scrutiny by commercial or residential neighbors.

However, recirculation isn’t always an option. If the application give off hazardous gases such as thermal spray equipment, foundry furnaces or other emissions sources, the hazardous gases cannot be stopped thus making the air unable to be returned to the plant. This is even after the fact that dust collectors can effectively capture the dry particulate contaminants.

BACKUP PROTECTION AND MONITORING

Today’s cartridge dust collectors offer very high filtration efficiency options, and a properly designed and maintained cartridge collector will typically be able to satisfy OSHA PEL requirements for most dusts as noted above.

Nevertheless, there is always the chance of a leak in the system. The use of a safety monitoring filter is recommended to provide backup protection in the event of a problem.

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