The rotary feeder air knife is a kind of ventilation valve controlled by the solenoid valve, which is controlled by the pulse signal generator. The solenoid valve is used for pulse air supply according to the required opening and closing time, so that the powder materials from the pressure tank can be cut into the material plunger with the same length by the air knife. Pulse pneumatic conveying system is a promising pneumatic conveying mode due to its high productivity, material gas ratio M of 30~300, conveying distance of 500 m, low air consumption, low conveying wind speed of only 1~2 m/s, less pipeline wear, less broken materials during conveying, and low energy consumption.

旋转供料器供料系统需要使用密闭性好的设备，不同工况设计不同的结构及密封的选择供料系统，供气力输送系统正压的输送使用，很好的解决了颗粒物料的防卡，粘附物料的粘壁，塑性物料的挤压塑化，高温物料的受热膨胀，磨损物料的设备**，温差物料的表面揭露等等一系列问题。

The feeding system of the rotary feeder needs to use equipment with good airtightness. Different structures and seals are designed for different working conditions. The positive pressure transmission of the pneumatic conveying system solves a series of problems, such as the anti seize of granular materials, the sticking of materials to the wall, the extrusion and plasticization of plastic materials, the thermal expansion of high-temperature materials, the equipment * * for wearing materials, and the surface exposure of temperature difference materials.