Low Pressure Dust Control

Low Pressure Dust Control in Action:  PA Landers in Plymouth, MA (lef)

Low Pressure Dust Control:  How they work

Low pressure systems use “street” pressure and/or a booster pump to deliver water through nozzles at an operating pressure below 100-pounds per square inch (psi). At this pressure, the water is delivered at a higher flow rate than a high pressure system and the droplet size is significantly larger (average 50-microns).  A low pressure dust control system is designed as a dust containment system where only the respirable or fine size particles are moved to the collection device.  The larger dust particles are contained instead of conveyed and are returned to the process stream.  At the pickup points, the pickup air flows, capture velocities, hood design and static pressures are the same in a high or low velocity transport system.

What Low Pressure Dust Control Does 

Low pressure systems provide dust suppression to nuisance type dust emission facilities (aggregates operations and stockpile locations). These types of systems work best with larger dust particles.

Where they fit

Low pressure systems are typically found in industrial facilities within buildings and mounted on portable equipment. Low pressure systems use large amounts of water and require a significant amount of space to house the associated equipment.

Why Use Low Pressure Dust Control

To control fugitive dust emissions relative to “nuisance” dusts.  The advantages of the low pressure system are lower energy consumption, lower maintenance cost, and more reliable dust control.  A high pressure system may lose effectiveness more quickly than a low pressure system.  A low pressure system may have a higher initial cost but in the long run you are saving on energy and maintenance costs.

Coverage and flow

The coverage area per system is variable. Air One can design a system that will treat dust emission source points and/or your entire facility. Depending on the water pressure and nozzle specification, typical systems range in flow rates from 3-gallons per minute up to 15-gallons per minute.

Sources:  AIHA