Dry Fog Dust Suppression System Technology: Dust Containment as Well as Minimal Moisture on the Material

Dry Fog Dust Suppression System Technology is a highly effective method for controlling airborne dust with minimal moisture, particularly suited for applications where excessive wetting of materials is undesirable. This technology is widely used in industries such as mining, bulk material handling, coal processing, and power plants.

Key Features of Dry Fog Dust Suppression:

1. Fine Droplet Size:
   • Dry fog systems produce extremely fine water droplets (typically 1–10 microns in size), which are comparable in size to airborne dust particles. These fine droplets effectively capture and agglomerate dust particles, causing them to fall out of the air without significant moisture impact on the material or surrounding surfaces.
2. Minimal Water Usage:
   • The system uses very little water (compared to traditional water spray systems) to form the fog. This prevents oversaturation and ensures that the material being processed or stored remains dry. The minimal moisture added is evaporated quickly, leaving the material virtually unaffected by the water.
3. Dust Containment:
   • Dry fog systems are usually deployed at dust generation points, such as conveyor belts, crushers, transfer points, or screens, where dust can become airborne. The fog encapsulates the dust particles, preventing them from dispersing into the surrounding environment, ensuring effective dust containment within a localized area.
4. No Wetting of Materials:
   • One of the primary advantages of the dry fog system is that it controls dust without wetting the bulk material. This is particularly beneficial in industries handling materials like coal, aggregates, or powders where excessive moisture can cause issues like clogging, material degradation, or poor product quality.

How the Technology Works:

• Fog Generation: The system uses specialized nozzles that combine air and water to create an ultra-fine fog with droplet sizes that are similar to the size of dust particles.
• Dust Particle Interaction: When the fog is introduced into the air, the small water droplets collide with the dust particles. Due to the similarity in size, they bond together, forming larger agglomerates.
• Dust Settlement: These larger particles become heavier and fall back onto the material surface or the ground, effectively removing dust from the air without leaving the material damp.

Applications of Dry Fog Dust Suppression:

1. Conveyor Transfer Points: To prevent dust from becoming airborne as material is transferred from one conveyor belt to another.
2. Crushers: Used at crushing sites to prevent dust generation during material size reduction.
3. Screens and Hoppers: Effective in reducing dust in material handling points such as screening or unloading hoppers.
4. Stockpiles: To control dust from open stockpiles without over-wetting the material.

Advantages:

• Efficient Dust Control: Dry fog systems effectively capture and control fine dust that traditional water spray systems may not handle as well.
• Low Water Consumption: Unlike traditional spray systems, dry fog uses very little water, minimizing operational costs and avoiding issues with runoff or material saturation.
• Environmentally Friendly: Reduced water usage and no need for chemical additives make dry fog a sustainable solution.
• Maintains Material Quality: Since the material remains dry, there’s no risk of degradation, clogging, or changes in handling characteristics due to moisture.
• Low Maintenance: Once installed, dry fog systems require minimal maintenance and can operate continuously with little operator intervention.

Where It Excels:

• Coal Handling and Processing: Dry fog systems are popular in coal handling due to the need to minimize moisture while controlling dust effectively.
• Mining: Used in mining operations where dust control is critical, but moisture addition needs to be minimized to prevent material degradation.
• Power Plants: Employed in power plants to reduce dust emissions from coal handling and ash transfer points.

Overall, dry fog dust suppression technology is a versatile, effective, and low-water-use solution, especially when dust containment is critical, and moisture addition must be minimized.