High density phase powder material conveyor with obstacle avoidance device having at least three caissons

摘要

A bypass device connected between an upstream and a downstream conveyor, and comprising at least three caissons: i) at the entry to the device is an upstream caisson comprising a lower duct supplied with gas at pressure P1, and an upper duct composed of a column, wherein the caisson is connected at one end to the upper duct of the upstream conveyor and at the other end to the upper duct of the intermediate caisson ii) in the middle is an intermediate caisson comprising a lower duct supplied with gas at pressure P3, and an upper duct connected to the upper duct of the upstream caisson and the upper duct of the downstream caisson iii) at the outlet to the device is a downstream caisson comprising a lower duct supplied with gas at pressure P2, and an upper duct composed of a column connected at one end to the upper duct of the intermediate caisson and at the other end to the upper duct of the downstream conveyor. Also disclosed is the use of said device in a process for conveyance of a powder material in a hyperdense bed to bypass an obstacle.