Corrosion-resistant fans are ventilation devices made of corrosion-resistant materials (such as fiberglass, polypropylene, stainless steel, etc.) or treated with special anti-corrosion materials. They are mainly used in environments with acidic, alkaline, or corrosive gases, such as chemical plants, electroplating plants, and mines. Their core working principle is based on the conversion of kinetic energy to pressure energy in fluid mechanics, with the specific implementation varying depending on the fan type (e.g., centrifugal or axial flow).
Centrifugal Corrosion-Resistant Fans: Driven by a motor, the impeller rotates at high speed. Under centrifugal force, gas is thrown from the center of the impeller to the surrounding areas, increasing its velocity and kinetic energy. The gas then enters the diffuser channel inside the casing, where its velocity decreases, converting kinetic energy into static pressure energy, thus pressurizing and expelling the gas. A negative pressure zone is formed at the center of the impeller, continuously drawing in fresh gas and completing continuous ventilation. This type of fan has high air pressure and is suitable for pipeline transport systems.
Axial Flow Corrosion-Resistant Fans: Gas enters along the fan's axial direction, is accelerated by the high-speed rotating blades, and then changes direction and decelerates in the flow guiding device, converting kinetic energy into pressure energy. Its simple structure and large air volume, but relatively low air pressure, make it suitable for direct installation on walls or near equipment for localized exhaust ventilation.
The key to corrosion-resistant fans lies in the corrosion resistance of materials and processes, such as using fiberglass shells, stainless steel impellers, or surface coating technology to ensure long-term stable operation in harsh environments.
