SYSTEM FOR DOSING AND INJECTING DENSE PHASE POWDERS BY GRAVITY AND AERATED BY A GAS

摘要

A dense phase powder supply system (1) comprising:- A dosing device (2), adapted to dose the powder at a given average flow rate;- A gravity injection device (3) of the powder in the form of a truncated cone, arranged below the metering device so as to receive the powder by gravity;- A gas blowing tube (4), the tube being straight and having at its lower end, a hole (41) opening along its axis, or a plurality of holes (42) opening radially to the axis of the tube substantially at the same longitudinal rib (P) thereof; the right tube being arranged in the truncated cone with its longitudinal axis X coincides with that of the truncated cone, so as to be able to locally inject a gas through the hole (s) into the flow of powder falling by gravity into the injection cone.