Reasonably select the power source air volume and air pressure based on the conveying distance and output of positive and negative pressure, and combine them into different forms of integrated positive and negative pressure pneumatic conveying systems according to different working conditions.

The centralized feeding system adopts a sealed circuit design with one machine and one pipe, ensuring stable operation of the entire system and no occurrence of moisture regain or material blockage.

The dense phase pneumatic conveying system has the characteristics of simple system, flexible layout, reliable operation, high degree of automation, low system investment, high conveying ash gas ratio, low flow rate, low maintenance workload, and low annual operating cost

Negative pressure pneumatic conveying refers to the pneumatic conveying system that uses Roots fan (Roots vacuum pump) to generate negative pressure, and pumps the powder and granular materials evenly mixed with air in the bin pump through the pipeline to the material seal pump device, and the conveying pressure of the whole pipeline is lower than the local air pressure. Pneumatic conveying is an early, reliable and mature conveying method for the whole pneumatic conveying. According to the different working pressure can be divided into low vacuum (vacuum degree less than 1000mm water column) and high vacuum (vacuum degree greater than 1000mm water column) two forms.

The positive pressure conveying system uses a positive pressure gas source as the conveying medium to transport materials at high speed into the pipeline, in a dispersed and suspended state, and transported in the pipeline. Use centrifugal fans, Roots blowers, air compressors, etc. as power sources. The conveying pressure varies from several thousand to several hundred kPa depending on different working conditions.