Dust Control: Air Handling Ducts
Suppress stone, coal, and other dust in vent ducts; control paint spray carry-over
Moving air through ductwork is an essential part of many industrial processes. Often the air in the duct contains particulates which need to be removed, either for process control reasons, human health concerns, maintenance reduction, or simply good housekeeping. Airborne dust can be captured using a water spray. Water sprays have an advantage over filter systems in that the water spray never gets clogged and never needs to be replaced.
The premise is that when a water droplet comes into contact with a dust particle, they will agglomerate and the resulting combination will be too heavy to remain suspended in the air stream. The water droplet/dust particle combination will then fall out of the air stream where the dust can be disposed of. To obtain the most effective dust removal, the droplet sizes in the water spray must be approximately the same size as the particle size. BETE can provide droplet size distributions to aid in the selection of the correct nozzle and operating parameters.
Please see our other pages that discuss dust control for conveyors, transfer points, handling machinery, and for larger areas as these require different spraying strategies.
Selecting a Dust Control Nozzle for Air Handling Ducts:
Very fine dusts can be suppressed with XA, L, or PJ series nozzles. For extremely fine particulates or a of particles in a fast-moving gas stream, a staged approach can be taken in which a spray of fine droplet sizes captures the very small particles and another spray of larger droplet sizes captures the smaller droplets.
Typical operating conditions for this application are listed for each nozzle
Very Fine Dust
Very Fine Dust