Abstract: An auger venturi conveying system for particulate materials includes a hopper-fed auger conveyor section for transporting the particulate material toward the discharge end of a barrel and a venturi arrangement for non-turbulent mixing of the material transported through the barrel with a pressurized gas flow. The venturi arrangement comprises a plenum chamber surrounding the barrel of the auger conveyor section adjacent the discharge end, a venturi pipe coupled to the plenum chamber having a tapered section leading to a constriction, and a jet member within the venturi pipe coupled to the discharge end of the barrel and extending approximately to the constriction. The outer surface of the jet member cooperates with the interior surface of the tapered section of the venturi pipe to form a narrow annular passage between the plenum chamber and the constriction of the venturi pipe. The venturi pipe is coupled at its other end to a conduit.

Abstract: An apparatus for feeding product to a pipeline via a venturi assembly has first and second tanks adapted to separately hold a quantity of product. The product is fed to the tanks from a supply hopper and enters each tank through an upper opening which accommodates a feed chute. The open end of each feed chute is closable by a flapper door which is swingable between open and closed positions. Pressurized air from a compressor is used to selectively close the flapper doors via a set of pressure valves which control the flow of air into the tanks. The product is fed from each tank to the pipeline through a Y-shaped housing and the venturi assembly. The housing has respective lower openings for each tank, also closable by swingable flapper doors. When the upper doors are closed by the air pressure, the product is forced out of the tank into the pipeline.