Roots blower (positive displacement blower )is widely used for pneumatic conveying system equipment. It is including power plant power station;chemical plant;cement industry ;food grains processing factory ; pharmaceuticals industry;PVC PP particles; soybean wheat ;peas ;rice husk powder conveying .coal dust pneumatic conveying project; it is beneficial for environment protection and control pollution. Pneumatic conveying is an important link of cleaner production.The pneumatic conveying process is a sealed pipeline conveying material instead of the traditional mechanical technology .It is a modern logistics system, is suitable for bulk material conveying.With strong advantages to replac the traditional mechanical transmission.Roots blower→material→pipe→bunker→bag dust collector→unloader