High density pneumatic transport method for use in powder or granular material and system for practising the method.

摘要

An improved method and the related system for pneumatically transporting powdered or granular materials stored in an airtight storage container(3) to a collector(6) through a transport pipe(5) in the form of a lengthy column(P) in high density and at a slow speed by the use of pressurized gas. The method of the invention comprises the steps of stopping feeding of the pressurized gas when the whole of powdered or granular materials corresponding to final batch contained in the storage container(3) are sent into the material transport pipe(5), simultaneously discharge internal pressure of the storage container(3) through a gas decompressing means(B), inserting a transport plug(14) from the base end of the material transport pipe(5), and carrying forward the transport plug(14) at a slow speed by feeding pressurized gas from the base end of the transport pipe(5).