A wetting system for a batch mixing plant is designed to control dust emissions by spraying fine mist or water at critical dust-generating points during the handling and mixing of dry bulk materials. It ensures better air quality, reduces product loss, and minimizes health hazards in industries such as cement, concrete, fly ash, chemical, or food powder processing.
Purpose
To suppress airborne dust by spraying water or fine mist during
Raw material loading/unloading
Weigh batching
Transfer to mixers or hoppers
Bag opening or silo feeding
Key Components
High-Pressure Mist Nozzles / Spray Nozzles
Stainless steel or brass
Fine droplet size (10–50 microns) for fog-like coverage
Installed above conveyor belts, mixer openings, hoppers, or bag dump stations
Water Pumping System
High-pressure pump (30–70 bar range)
Flow rate typically 2–15 LPM depending on plant capacity
Includes inlet filter and pressure relief valve
Control Panel (Manual or PLC)
Timed or sensor-based operation
Interlocked with batching cycle to spray during critical operation.
Piping Network
SS or HDPE lines with mist ring assemblies
Easily maintainable and corrosion-resistant.
Optional Add-ons
Solenoid valves for zone-based control
Humidity or dust sensors for automatic operation
Chemical dosing (for odor control or binding agents)
Working Principle
When batch ingredients are loaded or mixed, the system automatically sprays a fine mist into the air or onto material surfaces.
The water droplets capture airborne dust particles and bring them down, preventing them from escaping into the environment.
Benefits
Suppresses fugitive dust at source
Minimizes water consumption compared to traditional water sprays