초록 ▼

A closed loop method and apparatus for unloading particulate materials from a transport container into a supply bin is disclosed. Material is conveyed from the discharge manifold of the transport container via vacuum into a transfer unit. The transfer unit has a vacuum zone and a pressure zone. The

A closed loop method and apparatus for unloading particulate materials from a transport container into a supply bin is disclosed. Material is conveyed from the discharge manifold of the transport container via vacuum into a transfer unit. The transfer unit has a vacuum zone and a pressure zone. The material is transferred from the vacuum to the pressure zone within the transfer unit and is conveyed via pressure to a cyclone separator mounted upon the supply bin. The particulate materials are separated in the cyclone separator and dropped into the supply bin. The overhead stream from the cyclone separator on top of the supply bin is returned to the discharge manifold on the transport container. Excess pressure developed in the supply bin is relieved into the transport container. Excess pressure in the transport container is filtered before being vented to the atmosphere.

대표청구항 ▼

A closed loop pneumatic conveying system for transferring granular and powdered particulate materials from a transport container having a discharge manifold and a vent opening thereon, to a supply bin comprising: transfer unit means, having a first and second connection, for generating a vacuum at s

A closed loop pneumatic conveying system for transferring granular and powdered particulate materials from a transport container having a discharge manifold and a vent opening thereon, to a supply bin comprising: transfer unit means, having a first and second connection, for generating a vacuum at said first connection and pressure at said second connection; first conduit means for connecting a discharge manifold on the transport container to said first connection of said transfer unit; separator means mounted to the supply bin having an inlet, a particulate outlet and a fluid outlet for separating particulate material, from an incoming fluid-particulate material stream, through said particulate outlet into the supply bin; second conduit means for connecting said second connection of said transfer unit to said inlet of said separator means for transfer of particulate material under pressure; said transfer unit means further comprising conveying means to separate said transfer unit means into a pressure zone, connected to said second conduit, and a vacuum zone, connected to said first conduit, and to allow particulate materials to flow from said vacuum to said pressure zone; third conduit means for connecting said fluid outlet of said separator means to the discharge manifold on the transport container thereby closing a loop, said third conduit means being devoid of flow controlling elements therein; and means for venting the supply bin into the transport container. A method for unloading a transport container into a supply bin comprising the steps of: connecting a first cyclone separator inlet to a particulate material discharge connection of a transport container; applying a vacuum to said first cyclone separator to pneumatically convey particulate matter from the discharge connection of the transport container into the first cyclone separator; discharging particulate matter from the first cyclone separator through a valve into a pressure conveying line; applying a pressure source to the pressure conveying line to pneumatically convey the particulate material in the pressure conveying line to a second cyclone separator mounted to the supply bin; discharging particulate material from said second cyclone separator into the supply bin; conducting fluid and particulate matter emerging from an overhead connection on said second cyclone separator into a conduit connected to said particulate matter discharge connection of the transport container; venting the conduit used in said conducting step into a vent connection on the transport container.