The impeller feeder is one of the pneumatic conveying feeding equipment, which consists of a casing body, impeller, transmission device, sealing ring, etc. The upper end of the casing is the feeding port connected to the hopper, and the lower end is the discharging port. The rotating impeller is the main working component, which separates the inlet and outlet ports, allowing materials to smoothly enter the conveying pipe under positive pressure without overflowing.When the rotary feeder is working, the material is fed from the hopper above and falls between two blades. With the rotation of the blades, the material is continuously transported into the pipeline, and combined with the Roots blower, the material is transported out. The impeller feeder can be used in negative pressure or positive pressure pneumatic conveying systems; The function of negative pressure pneumatic conveying is to feed the material into the conveying pipe, and secondly, to fully mix the material with air and make it easy to accelerate; Thirdly, quantitative feeding is possible; In positive pressure pneumatic conveying, it has a significant impact on improving productivity and reducing pipeline pressure loss. It is a key equipment in the entire device and has the function of closing the air.

Principles for selecting from feeders:
1. Can supply materials in a quantitative, uniform, and dispersed manner, ensuring that materials and air can be fully mixed;
2. Low resistance and power consumption, try to make the flow direction of the incoming material as consistent as possible with the flow direction of the airflow, avoid reverse feeding, and reduce the energy consumption of the airflow pushing the material;
3. No air leakage or crushing of material particles;
4. Smooth feeding, reliable and stable operation, simple and easy to use, and durable;
5. When used as a feeder, it must have good airtightness to ensure its feeding capacity and prevent air leakage;
6. Simple structure, low height, small footprint, etc.