Positive pressure dense phase low velocity and high concentration (double pipe, single pipe) pneumatic conveying system is a product with international advanced technology level independently developed by our company on the basis of introducing German advanced pneumatic conveying technology and combining with years of practical experience This system is mainly suitable for the transportation of powder and granular materials such as carbon black (granulation), clay, zinc oxide, limestone powder, slag, fly ash, cement raw meal, mineral powder, rubber powder, grain , etc., mainly by compressed air source and purification System, aggregate unpacking and feeding system, pressure delivery (silo, pump, tank) system, conveying pipeline and distribution system, large storage bin (ash storage room) receiving system, daily storage hopper secondary receiving system, dust removal and pressure system, Microcomputer and PLC control system, etc. The control mode of the control system is divided into centralized control and on-site control, and the control form is a combination of automatic and manual.     Compared with similar products and mechanical conveying, this system has the advantages of clean environment, high degree of automation, flexible layout, convenient installation, high mixing ratio, large conveying capacity, long conveying distance, low conveying crushing rate, and no blockage (proprietary forward and reverse pumping anti blocking technology), safe and reliable operation, which is superior to other types of conveying modes.