Negative pressure pneumatic conveying is a system that uses negative pressure (i.e. pressure difference below atmospheric pressure) to transport materials. Its working principle is to generate negative pressure in a closed pipeline, suck the material into the pipeline, and then transport the material to the destination through pneumatic means. The negative pressure pneumatic conveying system has a series of advantages, such as remote control, easy centralized management, and less pipeline blockage.

In the negative pressure pneumatic conveying system, the main equipment includes suction fans, suction nozzles, pipelines, and dust collectors. The suction fan generates negative pressure, and the suction nozzle sucks the material into the pipeline. Under the negative pressure, the material is transported along the pipeline to the dust collector and reaches the destination. The function of a dust collector is to remove dust and impurities from materials to maintain their purity.

The negative pressure pneumatic conveying system has a wide range of applications and can be used to transport various granular, powdery or small block materials, such as grains, fertilizers, feed, etc. Its applicable scenarios include but are not limited to factory production lines, warehouses, ports, airports, and other places that require a large amount of material transportation. Compared with traditional mechanical conveying methods, negative pressure pneumatic conveying systems have higher conveying efficiency, lower energy consumption, and lower maintenance costs.

It should be noted that negative pressure pneumatic conveying systems also have some drawbacks, such as not being suitable for conveying materials with high humidity, and pipelines being prone to wear and tear. Therefore, in practical applications, it is necessary to choose the appropriate conveying method according to the specific situation to achieve the desired conveying effect.