How to solve the problem of corrosion and scaling in the exhaust fan impeller?
Thread Content
The image below shows that the impeller of the environmental protection exhaust fan is heavily covered in dust, with an operating temperature of 80–90°C. Generally, the rotational speed is greater than 1000 r/min. After the equipment has been in operation for some time, corrosion appears on the surface of the fan impeller, along with an accumulation of ash and dirt, which severely affects the dynamic balance of the impeller and its safe operation. Are there any good ways to solve this problem given this situation?
To address issues of impeller corrosion and scaling, the following measures can be taken: 1. Regular cleaning: Clean the smoke extractor impellers regularly to remove dust and scale. 2. Use of coatings: Apply special anti-corrosion and anti-scaling coatings to the surface of the impeller. 3. Optimize materials: Consider using high-temperature and corrosion-resistant materials to manufacture the impeller, such as stainless steel. 4. Process improvement: Examine and optimize the operation of the exhaust system to reduce the generation of pollutants. 5. Install filtering equipment: Add a filtering device at the flue gas inlet to remove some dust and impurities. .
This is a really annoying problem. The measures taken back then, such as applying oil, spraying paint, and using water for cleaning during operation, were all unsatisfactory. Rust dust, lime, and other dust particles in the flue gas accumulate firmly on the impeller blades, making cleaning a time-consuming and labor-intensive task. In the end, it was resolved by choosing a cleaning method that is convenient. At that time, 10,000 yuan was spent on a sandblasting machine; the cleaning process was labor-saving and thorough, and the service life of the equipment was extended by more than twice. For reference.