The blower and induced draft fan are two common types of fans in the industrial field, which have significant differences in function and application.

Firstly, from the perspective of working principle, the blower mainly generates centrifugal force through the rotation of the impeller, which sucks in air from the center of the impeller and accelerates it before being discharged, thus forming an airflow. This type of airflow is usually used for conveying materials, ventilation, or providing power. The induced draft fan, on the other hand, utilizes the principle of negative pressure to form a negative pressure zone at the air inlet through the rotation of the impeller, which then sucks in air and is accelerated before being discharged. Induced draft fans are commonly used in scenarios such as flue gas treatment and ventilation.

Secondly, from the perspective of structural characteristics, blowers are usually designed with axial or centrifugal flow, which have the characteristics of high flow rate and low pressure. It has fewer blades and a radial distribution of airflow. In contrast, induced draft fans mostly adopt centrifugal design, which has the characteristics of small flow rate and high pressure. It has a large number of blades and an axial distribution of airflow.

Finally, in terms of application, blowers are widely used in industries such as chemical, metallurgical, and power, for material transportation, ventilation, and ventilation. Induced draft fans are more commonly used in environmental protection, boilers, and other fields, for flue gas treatment, combustion air supply, and so on.

In summary, there are significant differences between blowers and induced draft fans in terms of working principles, structural characteristics, and application fields. In practical applications, appropriate fan types should be selected based on specific needs and scenarios.