Composition and Operating Environment of Industrial Boiler Fans

In industrial boiler fans, gas enters the impeller axially. As the gas flows through the impeller, it changes direction and then enters the diffuser. Within the diffuser, the gas alters its flow path to induce deceleration, thereby converting two forms of energy.

A slight increase in air pressure occurs during the impeller's rotational speed, followed by the expansion process. In multi-stage fans, a return duct directs air into the next impeller to generate pressure.

Industrial boiler fans primarily consist of an impeller and a casing. The impeller is directly mounted on the motor and connected via a coupling.

Centrifugal fans typically feature a single-sided inlet and utilize a single-stage impeller. High-flow pumps can draw air from both sides, employing two back-to-back impellers—also termed double-suction.

The impeller is the core component of a fan, with its shape, dimensions, blade count, and manufacturing significantly impacting performance. Impellers require static or dynamic balancing to ensure stable fan rotation. Based on blade outlet direction, impellers are categorized into three types: forward, radial, and backward.

Industrial boiler fans constitute a general category of machinery for exhausting gases. Based on discharge pressure, they are classified as blowers, compressors, and turbo compressors. The term “small and medium-sized enterprises” in the fan industry primarily refers to companies manufacturing various types of fan products.

Fan products are characterized by their extensive range and broad coverage. Their structures are not overly complex, and manufacturing precision requirements are relatively low. Nevertheless, they account for approximately 96% of all fans in the industry.

Correcting the development of micro-enterprises in the fan industry not only holds practical significance but also concerns the long-term interests of the sector. Skilled workers, engineers, and technicians all require continuous knowledge enhancement.

Industrial boiler fans serve various industrial applications. Generally, industrial boiler fans are suitable for low-flow, high-pressure scenarios, while axial fans are typically used for high-flow, low-pressure conditions.

With the continuous advancement of science and technology, demands for fan performance continue to rise. Boiler fans can be either centrifugal or axial flow types, depending on boiler specifications.

Based on function, industrial boiler fans can be categorized into those that supply air to the boiler and those that exhaust flue gases from the boiler.