Reducing the Amount of Water Droplets Carried with the Exhaust Air (Drift Reduction)
The primary function of drift eliminators is to prevent small water droplets from escaping the cooling tower along with the airflow.
Water droplets suspended in the air stream (drift) can cause environmental problems (pollution of surrounding soil and water) and water loss in the system.
Drift eliminators collect and separate these droplets, minimizing water loss.
Environmental Protection and Water Conservation
By reducing the amount of suspended droplets in the exhaust air, the pollution caused by water discharged into the environment is decreased.
The collected water is returned to the tower’s water loop, optimizing water consumption and reducing costs.
Reducing Corrosion and Damage to Nearby Structures and Equipment
Water droplets containing chemicals or dissolved solids may damage nearby structures and equipment.
By removing suspended droplets from the air, drift eliminators help protect auxiliary equipment and surrounding structures.
Preventing Slippery Surfaces and Safety Hazards
Water droplets that escape may drip onto the ground and create slippery surfaces.
Drift eliminators reduce these droplets, thereby decreasing the risk of accidents and safety hazards.
Operating Principles and Mechanism
Drift eliminators are typically constructed from thin plates or blades shaped in specific patterns (such as Z, V, or W shapes).
The airflow is forced to follow a spiral or zigzag path, causing droplets to impact the plates due to inertia and centrifugal force, thus separating from the air.
The separated water is redirected downward and returned to the cooling tower water circuit.
Importance of Design and Material Selection
Drift eliminators must resist the chemical and mechanical conditions of cooling water. They are usually made from corrosion-resistant plastics such as PVC, PP, or reinforced polypropylene.
Optimized design of drift eliminators ensures minimal airflow pressure drop and improves overall tower efficiency.
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