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.

Abstract: A no-moving parts pulverizer and classifier system reduces carbonaceous materials to one hundred fifty microns to less than ten microns using superheated steam or any gas capable of being compressed and expanded thru machined orifices. The resultant size reduction depends upon the classifier gas rate and pressure, the pulverizer gas rate and its pressure. These combinations control and regulate maximum particle size, average particle size and the mix of gas and solids in process. The feedstock enters the classifier chamber by auger or similar as long as the feeder maintains a positive seal. The classifier chamber separates the feedstock by size and particles of a predetermined size exit the system in a specific ratio of gas and solids. The feedstock larger than specified exit the base of the classifier, split into two equal streams and accelerate thru the pulverizer. The reduced feedstock exits the pulverizer, mixes with incoming feedstock and again enters the classifier.