Dust Suppression Systems
Solutions for Dust Prevention and Suppression:
Wet Dust Control System Fundamentals:
Dust prevention: Humidity or moisture content in the material is increased to prevent dust from becoming airborne.
Dust suppression: Moisture or a Sprayed Mist is sprayed into the air to capture dust particles that are already airborne.
These systems use spray nozzles to apply water and/or chemicals such as wetting, foaming and binding agents to dust particles. However the system configuration varies depending on the goal – dust prevention or airborne dust suppression.
Most operations require both prevention and suppression to effectively control dust.
Each spray provides a range of drop sizes; this range is referred to as drop size distribution. The drop size distribution is dependent on the nozzle type and will vary significantly from one nozzle-type to another. The importance of drop size in dust suppression stems from the role it plays in Airborne (Fugitive) Dust Knockdown. Once dust particles become airborne the dust reduction application becomes one of capturing, knocking down or scrubbing many of the particles from the air or gas.Studies have shown that dust-capturing efficiency depends strongly on the ratio of spray drop size to dust particle size.
Dust particles in the range of 2 to 3 microns were best captured with drops of about 100 times the size of the dust particles. For capturing much larger size dust particles, a drop size of approximately the same size or somewhat larger than the particle size would be adequate. The drop size required for a specific application has an important effect on nozzle selection.Furthermore, capturing airborne dust with water sprays is most effective in areas with little turbulence. Depending on the environment, enclosures may be required.
Before & After Videos
ROM Bin Dust Suppression – Before
ROM Bin Dust Suppression – After
Typical Dust Suppression Applications:
- Primary Dump Hoppers
- Jaw Crushers
- Vibrating Screens
- Transfer Points
- Cone / Gyratory Crushers
- Coal Loading Terminals
- Stackers and Reclaimers
- Transport Areas / Railroads
- Railroad Dump to Conveyer
- Railroad Rotary Dump to Receiving Hopper
- Feeder to Impactors
- Feeder to Hammer-mill Crushers
- Feeder to Bucket Elevator
- Feeder to Belt Conveyor
- Feeder to Storage Hopper
- Mine Shafts – Ventilation
- Long- wall Shearers
- Continuous Miners
- Products / Washing ore or coal Conveyer Belts
There are many variables to consider when specifying a spray system for dust control applications :
- Dust particle size
- Spray drop size
- Spray pattern
- Spray angle
- Operating pressure
- Surface wetting
- Nozzle placement
- Water quality and availability
- Control options
These and many other factors, can have a significant impact on the overall performance and efficiency of a dust-control system. Working with a single supplier who is an expert in all facets of spray technology is the best way to ensure optimal dust control. We are uniquely qualified to be that supplier.