Working principle and advantages of dilute phase pneumatic conveying system of Roots blower for negative pressure conveying

Working principle and advantages of dilute phase pneumatic conveying system of Roots blower for negative pressure conveying

Negative pressure dilute phase pneumatic conveying system

The negative pressure pneumatic conveying system is mainly composed of: pneumatic conveying fan, reclaiming device, pipeline, buffer bin, dust remover, unloading device, etc.

The negative pressure dilute phase pneumatic conveying system mainly uses the negative pressure roots vacuum pump as the power source. The pipeline conveying pressure is in the low vacuum state, the pipeline wind speed is about 10-35 m/s, and the material is in the form of fog in the pipeline. The starting pressure of negative pressure transmission is equal to or close to atmospheric pressure, and the ending pressure is between - 10 and - 50Kpa. The vacuum degree of the pipeline gradually increases along the pneumatic transmission pipeline.

working principle

1. The system mainly uses Roots blower or vacuum pump as the air source equipment, and the air source equipment is at the end of the system;

2. The components of the reclaiming device of the pneumatic conveying system usually adopt the suction nozzle with special structure;

3. After the fan runs, the whole system of air extraction forms negative pressure. The material is sucked into the material conveying pipe by the pressure difference between the inside and outside of the pipe. The material and part of the air are sucked into the suction nozzle at the same time and sent to the buffer bin;

4. In the buffer bin, the material is separated from the air, and the separated material is discharged from the bottom of the buffer bin through the air lock valve;

5. The fine powder particles not separated are transported into the dust remover for purification, and the purified air is discharged into the atmosphere by the fan.

System advantages

1. The negative pressure system has the characteristics of large pneumatic conveying capacity, long conveying distance, fast conveying speed, etc;

2. The system is easy to take materials. It is suitable for taking materials from low pressure, deep and narrow reclaiming points. It can be used in situations where it is required to take materials without producing dust. It can realize centralized feeding from multiple places to one place. The negative pressure dilute phase pneumatic conveying system has wide applicability and is widely used, and the powder and particle can be transported smoothly;

3. The air source of the system is located at the end, and the lubricating oil or water will not be mixed with the transported materials, so the transported materials are cleaner;

4. The system has negative pressure in the material conveying pipeline, so when there is wear or gap in the system pipeline, the conveyed materials will not leak. In addition, since the pressure in the negative pressure dilute phase pneumatic conveying system is lower than atmospheric pressure, the water is easier to evaporate, so it is easier to transport materials with more water than other methods;

5. The gas transported by the system is generally directly taken from the atmosphere, and the temperature of the gas is the ambient temperature, so the negative pressure pneumatic conveying system is suitable for temperature sensitive heat sensitive materials

The negative pressure dilute phase pneumatic conveying system has high bulk material conveying efficiency. Because the materials are transported in a completely closed pipeline, it can avoid moisture, dirt and other sundries in the conveyed materials. The quality of material conveying is high, which can be sent from multiple points to one place or from one place to multiple places, and can realize long-distance conveying. In addition, In the process of material conveying, the system can also realize various technological operations such as material mixing, crushing, grading, drying, cooling, dust removal, etc.