The star discharger is used to install at the discharge port of the discharger working under negative pressure. The upper part accepts the material discharged by the discharger, and relies on the rotating impeller to transport the material and also acts as a seal to prevent air from being inhaled from the discharge port during the pneumatic conveying process. As a special discharge equipment, ensuring the normal discharge of the discharger plays a great role in cleaning and cleaning work. The star discharger device is the main equipment of dust removal equipment, air supply and other equipment feeding. It is widely used in building materials, metallurgy, chemical industry, electric power and other departments as the ash hopper discharging device of various dust removal equipment. It relies on the gravity action of the material and the forced action of the feeder working mechanism to discharge the material in the warehouse and feed it into the next device continuously and evenly. It can also be used as a feeding and unloading device for various grinding machines, dryers, silos and other equipment, suitable for drying powder and small particles.