Rotary feeder
Rotary feeder working principle
- The working principle of the rotary feeder is to make the rotor with blades rotate in the cylindrical casing through the transmission of the motor and reducer, thereby realizing the transportation and unloading of materials. Material falls from the upper hopper and fills the space between the blades. As the blades rotate, they reach the lower part and are discharged. Rotary feeders are usually equipped with a pressure equalizing exhaust port to reduce the phenomenon of gas ejection and ensure the smooth fall of materials. This equipment plays a role in uniform and continuous feeding of materials in the pneumatic conveying system, and has the functions of unloading and air locking in the separation and dust collection parts of the system.
- The structure of the rotary feeder includes a rotor with several blades, a casing, a seal, a reducer, a motor, etc. It has reliable operation, low noise, few failures and long life, and is suitable for dust removal, metallurgy, building materials, chemical industry, food and other industries. According to different usage environments, rotary feeders can also be divided into standard, high-pressure, high-temperature, wear-resistant, anti-jamming and electric types to meet different work needs.
The purpose of the rotary feeder
- Grain processing: Transport barley, malt, etc. in the malt workshop and brewing workshop of the brewery.
- Chemical Raw Materials: Widely used in the transportation and measurement of chemical raw materials.
- Plastic Metallurgy: Used for material transport in the plastics and metallurgical industries.
- Energy and Mining: It is also widely used in the fields of energy and mining.
- Building Materials Cement: Used for the transportation and measurement of materials in the building materials and cement industries.
- Terminal: Used for the transportation of bulk materials in the terminal industry.
Technical parameters of rotary feeder
- Feeding capacity: Feeding capacity per hour (t/h), converted to cubic meters per hour (m³/h) of the rotary valve.
- Pressure difference: The working pressure difference (kPa) between the upper and lower flanges when ensuring the feeding performance of the rotary valve.
- Temperature: The temperature of the medium material in the rotary feeder. Different temperatures determine the gap setting of the rotary valve. When the temperature is higher than the environment, measures such as heat preservation and heating should be considered.
- Gas leakage: The amount of gas leakage through the gap between the rotor and the shell when the feeder has a pressure difference (m³/h).
- Speed: The number of revolutions of the rotor per minute (RPM).
- Filling coefficient: Volumetric efficiency without pressure difference, related to the geometric size, shape and material characteristics of the rotary feeder.
- Wear resistance: The characteristics of the material itself affect the degree of wear of the casing and rotor of the rotary valve pneumatic conveying project. Wear-resistant feeders should be used for materials with high wear resistance.
Main features of rotary feeder
- As feeders, rotary feeders are widely used. In the suction-type pneumatic conveying system, it is used for unloading and ash discharge at the lower part of the separator and dust collector; in the pressure-feeding pneumatic conveying system, it is used for feeding materials at the beginning of the conveying end.
- Simple structure, easy to use and maintain:
- Compact structure, small dimensions, and small installation space:
- By adjusting its rotational speed, it is easy to change the feeding amount:
- As the material changes and the amount of material stored in the upper separator changes, the discharge amount changes very little:
- Has a certain degree of air tightness:
- Almost no damage to the transported materials:
- Materials can be transported when the temperature is <500°C.
- Generally, it is suitable for powdery granular materials and small lump materials with good fluidity and low grindability.
