Working principle and three forms of pneumatic conveying Roots blower conveying powder materials

The working principle of pneumatic conveying of powder particles is to use the kinetic energy of air flow generated by the operation of Roots blower to make the granular materials in a suspended state to be transported along the pipeline with the air flow. There are three ways of using Roots blower to transport powder: suction type, pressure type and mixed type. The following is the introduction of three forms of Roots blower conveying powder:

1、 Suction type. Roots blower is a negative pressure Roots blower. After the Roots blower is started, the whole system presents a certain degree of vacuum. Under the effect of pressure difference, the air flow makes the powder enter the suction nozzle, It is delivered to the separator at the rotary discharge place along the material conveying pipe. The powder is discharged from the bottom of the separator after being separated from the air flow. The air flow is purified by the dust remover and then discharged into the atmosphere through the muffler. The advantage is simple material supply, It can absorb powder from several places at the same time. But the conveying distance is short and the productivity is low. High sealing requirements.

2、 Press feed type. The operation of Roots blower presses air into the conveying pipe, and the powder is fed from the rotary feeder. The mixture of air and powder is pressed along the conveying pipe to the unloading place by the wind pressure generated by Roots blower, The powder is discharged through the separator, and the air is discharged into the atmosphere after being purified by the dust remover. Contrary to the suction type, the powder can be transported to several places at the same time. The conveying distance is long, the productivity is high, but the structure is complex.

3、 Hybrid. The combination of positive pressure conveying powder and negative pressure suction conveying powder of Roots blower. Compared with the mechanical continuous conveying device, it is characterized by: the material is completely sealed during conveying, It is less affected by climate and environment, and the working conditions of workers are good, The powder material will not be affected with damp, dirt or mixed with impurities. The equipment is simple, compact, flexible, small in floor area, and low in equipment cost. Some processes (such as crushing, drying, grading) can be carried out at the same time, which is easy to control centrally, and can realize automation and improve the conveying capacity.

The pneumatic conveying device is a device that uses air flow to transport granular materials along the pipeline. Suction type There are three types: pressure feed type and hybrid type. Its working principle is to use the kinetic energy of the air flow to make the granular materials in a suspended state to be transported along the pipeline with the air flow. Except for materials that are fragile, highly adhesive, abrasive, corrosive and prone to chemical changes, Generally, loose materials can be transported.