The centrifugal cabinet exhaust fan, when applied for extended periods in the chemical raw material processing industry, faces corrosion issues that need to be addressed. To prevent or slow down corrosion, the following are three recommended strategies:
Select the Appropriate Fan Model and Materials
Different separation conditions and materials affect fan selection, making it crucial to choose the correct centrifugal cabinet fan. After determining the fan model and main parameters, it is necessary to carefully select the material for reinforcing ribs based on various factors such as corrosion resistance, performance rationality, cost, and effectiveness in different environments. The material’s safety must be strictly verified to ensure it can withstand chemical medium corrosion during long-term use. This not only enhances the durability of the equipment but also reduces failures and downtime caused by corrosion.
Optimize Mechanical Devices and Structural Design
The mechanical and structural design of the fan can significantly extend its service life and ensure its proper operation. In the fan’s structural design, factors that accelerate corrosion mainly come from stress concentration and gap environments. Even if metal immersed in corrosive solutions corrodes slowly, stress concentration areas and tiny gaps can lead to localized corrosion, forming cracks that further trigger chemical reactions. This electrochemical reaction accelerates crack propagation and results in severe corrosion. Therefore, during design, special attention should be paid to avoiding stress concentration and reducing the formation of gaps. Additionally, in existing technologies, the centrifugal cabinet fan is typically driven by a single motor. If a power failure occurs, relying on a backup power source can pose risks. Particularly during emergencies such as fires, traditional power sources and backup lines may be damaged, causing the motor to fail, disabling the mechanical smoke control system, and potentially resulting in severe harm and equipment damage. To address this safety issue, new cabinet exhaust centrifugal fans use a more intelligent power switching system. When the main power is operational, the fan is driven by the motor, and if power fails, the backup motor will automatically start, ensuring the fan continues to operate and stabilizing the mechanical smoke control system, thus reducing accident risks.
Improve the Fan’s Corrosion-Resistant Treatment
To effectively enhance the fan’s corrosion resistance, surface treatments such as anti-corrosion coatings or plating can be applied to critical parts of the fan. These treatments not only improve the fan’s anti-corrosion capability but also enhance its wear resistance and anti-aging properties, further extending the equipment’s lifespan. Additionally, using corrosion-resistant alloys or composite materials to manufacture the fan blades and core components can maintain stability under prolonged chemical medium exposure, preventing performance degradation or failures caused by corrosion in traditional materials.
These improvements and measures will effectively enhance the overall performance and safety of the centrifugal cabinet exhaust fan, ensuring its long-term stable operation in harsh environments such as the chemical industry.